Ali İhsan Kaya - Academia.edu (original) (raw)

Papers by Ali İhsan Kaya

Cesitli iletken mineraller ile islem goren lif levha kompozit malzemeler yuksek ekranlama ozellig... more Cesitli iletken mineraller ile islem goren lif levha kompozit malzemeler yuksek ekranlama ozelligi ve kolay endustrilesme ozelligi nedeniyle yaygin kullanima uygundurlar. Teknolojik gelismeler ile birlikte artan elektromanyetik kirlilik insan sagligini tehdit etmektedir. Elektromanyetik alana uzun sure maruz kalindiginda dokulara zarar vermekte ve zamanla kansere sebep olmaktadir. Elektromanyetik alanin istenmeyen zararlarindan korunmak zorunluluk haline gelmistir. Bu calismada mineral katkili odun liflerinden levha tasarlanmasi hedeflenmistir. Bu amacla calismada mineral katkili odun lifi esasli kompozit malzemelerin 300MHz, 900 MHz, 1800 MHz, 2100 MHz ve 2400 MHz frekanslarinda elektromanyetik ekranlama yetenegi sayisal olarak belirlenmistir. Deneysel sonuclar, mineral tozlarla (BaSO 4 , C, Fe 2 O 3 , NiSO 4 ) odun lifi esasli levhalarin elektromanyetik koruma etkinliginin kabul edilebilir seviyelerde oldugunu gostermektedir.

Tetra Pak ambalajlari, kullanimlari sonrasinda cevre kirliligi olusturmaktadir. Tetra Pak ambalaj... more Tetra Pak ambalajlari, kullanimlari sonrasinda cevre kirliligi olusturmaktadir. Tetra Pak ambalajinda bulunan % 5 oraninda aluminyumun (Al) geri kazanilmasi hem cevre hem de ekonomik degeri acisindan onemlidir. Al iletken metal olup yaygin bir sekilde bakir gibi elektromanyetik girisimin sogurulmasi icin kullanilabilmektedir. Gelisen teknoloji ile birlikte kullanimi artan elektrikli ve elektronik cihazlarin olusturdugu elektromanyetik alanlar parazite sebep olur. Ayni zamanda uzun sure maruz kalindiginda insan sagligina zararli etkileri bulunmaktadir. Bu nedenle elektromanyetik girisimi soguran malzemelere ihtiyac bulunmaktadir. Bu calismada Tetra Pak ambalajlarinin geri donusumunden elektromanyetik girisimi soguran kompozit malzeme yapilmistir. Proses asamasinda geri donusumden kazanilan Al folyo % 5-10-20-30 oraninda katkilanarak dort tip orta yogunluklu kompozit levha yapilmistir. Isi-basinc islemi sonucu olusan kompozit malzeme tamamen geri donusum elemanlarindan (%75 kâgit, %...

BioResources

The physical and mechanical properties of thermally modified wood impregnated with linseed oil we... more The physical and mechanical properties of thermally modified wood impregnated with linseed oil were investigated to find the relationship between the treatment and the acoustic properties. The samples were impregnated with linseed oil (LO). Heat treatment was performed in an oven at four different temperatures, namely 160, 180, 210, and 240 °C. Statistically, the physical, mechanical, and acoustic properties of the treated wood were significantly intensified as compared to the control samples. The physical properties (water absorption) of the treated wood decreased by 72% as compared to the control group. However, while the increase in both MOR and MOE at 240 °C was 13%, the increase in CS at 240 °C was 7%. As a result of the heat treatment, the porosity increased by 33% as compared to the control group. At 240 °C the maximum SAC value was observed to be 0.71 at 5000 Hz and at 4500 Hz 0.78 and 0.80, respectively. The highest STL value, which was 69.9 dB, was observed at 1540 Hz and ...

Journal of Engineering Research and Reports, 2022

Olivine and dolomite addition with some formulations clearly retarded the water absorption change... more Olivine and dolomite addition with some formulations clearly retarded the water absorption change in both bark (Type 1 boards) and cone (Type 2 boards) based experimental panels. However, the lowest water absorption value of 15.20% was found in dolomite contain (40:60, dolomite-bark chip, w/w, %) sample which show approximately 169.6% lower than olivine contain sample at similar proportions. However, it is important to note that Type 1 boards show considerably lower water absorption than Type 2 boards at similar experimental conditions. The boards which produced with 10-, 20-, and 30% dolomite and 90-, 80-, 70% bark chips (XBI, XBII and XBIII) proportions, show higher thickness swelling (TS, %) than control (B0) while rest of show lower TS than control samples, regardless of type of mineral or experimental conditions. The highest TS improvement of -79.1% was found with sample of YBV which produced with equally (1:1, w/w) proportions olivine and pine cone chips in matrix. It is notic...

Asian Journal of Chemical Sciences, 2022

The aim of this study was to investigate experimental panels produced from mixture of agriculture... more The aim of this study was to investigate experimental panels produced from mixture of agriculture wastes with mineral adducts under synthetic adhesive bonding process. In this respect, the effects of the two different mineral loading as reinforced additive (olivine and dolomite) in lignocellulosic matrix (agricultural residue of tomato- and eggplant stalk chips) system were investigated. The highest heat conductivity value of l: 0.461 W/mK and 0.449 W/mK was found on panels that made only from tomato stalk- and eggplant stalk chips (controls) while lowering effects were found when dolomite and olivine added to matrix at various proportions. But all heat conductivity value were found to be lower than standard value (l: <0.065 W/mK). However, all the experimental panels show the burning pattern on the surfaces which char did not reach the 150 mm threshold limit, regardless of board formulations or experimental conditions. It could be proposed that proportions of olivine and dolomit...

Mehmet Akif Ersoy Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2020

Lignocellulosic waste of eggplant and tomato stalks has used with minerals of olivine and dolomit... more Lignocellulosic waste of eggplant and tomato stalks has used with minerals of olivine and dolomit at various proportions to produce experimental particleboards that have subject to some physical and mechanical tests. In this regards, Thickness Swelling in water (TS, %), Water Absorption (WA, %), Internal Bond (IB), Bending Strength (MOR), Modulus of Elasticity (MOE) and color properties (CIE,L,a,b) of the boards were examined. It has observed that type and content of minerals effects TS and WA of test panels. Besides the internal bond strength values of the test boards that were generally higher than 0.28 N/mm 2 , it was found that the bending resistance properties of the boards produced with tomato stalk/dolomite mixture show higher MOR values in similar manufacturing conditions than those produced with olivine. However, boards prepeared from tomato/eggplant stalks proportions with dolomite/olivine mixture sho lower MOE values than the standard value in all production conditions.

Mehmet Akif Ersoy Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2019

Due to the growing environmental concern, lignocellulosic materials have become a common substitu... more Due to the growing environmental concern, lignocellulosic materials have become a common substitute for the conventional reinforcement element in composite strcutures. However, these natural sources are preferred to cost efficient and to increase mechanical performances. In a cement bonded composites, wood is incorporated as an aggregate in the mineral matrix (as fibres, sawdust, shavings or particles), and cement acts as a binder. These are employed due to their ease of production, and the enhanced biodegradability, leading to applications for sustainable purposes in construction applications. Wood-cement composites are considerably better performance on high fire, weathering and bio-deterioration risk applications to which solid wood and resin bonded composites are vulnerable. However, the vast of literature on cement-wood bonded composites has already been reviewed and pointed by a number of researchers. Many valuable fundamental informations have already established for utilizing wood for these products. A comprehensive results was to investigate some wood species that are abundant resources in many countries, for their suitability for manufacturing such composites.

Mehmet Akif Ersoy Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2018

Elektronik endüstrisinin büyümesinin ve haberleşme, otomasyon, biyomedikal, uzay ve diğer alanlar... more Elektronik endüstrisinin büyümesinin ve haberleşme, otomasyon, biyomedikal, uzay ve diğer alanlardaki yaygın kullanımının etkisi birçok elektromanyetik girişim sorununa yol açmaktadır. Elektromanyetik girişim bir elektronik cihazın, başka bir elektronik cihazdan kaynaklanan, radyo frekansı spektrumunda bir elektromanyetik alanın yakınında çalışmasıyla ortaya çıkan bozulmadır. Bu bozulma elektronik cihazları etkilediği gibi insan sağlığını da etkilemektedir. Bu nedenle, elektromanyetik girişimin olumsuz etkilerinden etkili bir şekilde korunma ihtiyacı ortaya çıkmaktadır. Bu makalede, yönlendirilmiş yonga levha ile bakır levha karma kompozit malzeme olarak kullanılmıştır. Yönlendirilmiş yonga levhanın ara yüzeyi ile yüzeyi bakır folyo ile kaplanarak metal kafes oluşturulmuştur. Bakır folyo kaplı yönlendirilmiş yonga levhanın 1.88 GHz ile 2.62 GHz ve 5.20 GHz ile 5.62 GHz frekansları arasında elektromanyetik soğurma etkinliğinin kabul edilebilir düzeyde olduğu görülmüştür.

American Chemical Science Journal, 2016

The boards made from wood and secondary fibers appears to be well correlated secondary fiber/wood... more The boards made from wood and secondary fibers appears to be well correlated secondary fiber/wood fiber proportions in terms of the behavior of the sound acoustic properties. However, boards were generally shown better acoustic (sound absorption) properties in high frequencies. Moreover, at middle level frequencies and lower boric acid addition (5.0%), the boards made from equal proportion of wood and secondary Old Corrugated Containers (OCC) and newspaper fibers shows markedly improved acoustic properties. However, the boric acid addition had only marginal effects on relative thermal resistance values either improve or increase thermal properties, vice versa. It was observed that both the secondary fiber ratio contributes to the control of the relative thermal resistance values, and that under certain experimental conditions thermal resistance value of as low as 0.140 W/mK can be achieved. It was also found that increasing boric acid content negative impact on thermal degradation that decomposition temperature was increased for boards in all boric acid conditions. This is an important result considering boric acid affects improving board's thermal resistance some level. However, the endothermic peaks at 71 ºC, 266 ºC and 333 ºC for Differential Scanning Calorimetry (DSC) have clearly consisted with Thermogravimetric Analysis (TGA) curves.

Erzincan Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2019

Knowing the mechanical and physical properties of a material is the most important criteria for e... more Knowing the mechanical and physical properties of a material is the most important criteria for engineers and designers interested in determining the intended use of the material. The prediction of wood composite materials based on their mechanical and physical properties plays an important role in their future application. In this study, radial basis function network approach was employed for prediction according to mechanical and physical properties of wood composite materials such as particleboard, fiberboard, oriented strand board and plywood, which have widespread use in the furniture industry and construction sector. Four physical and mechanical properties were used as the board density, bending strength, bending elastic modulus and tensile strength in the prediction of the wood composite materials. This study will assist wood composite users in the selection of wood composite materials that will provide the mechanical and physical properties determined in advance for any construction. Moreover, the present study will fill this gap in literature.

Maderas. Ciencia y tecnología

Red pine (Pinus brutia) wood particles and dolomite mineral were used in varying proportions to f... more Red pine (Pinus brutia) wood particles and dolomite mineral were used in varying proportions to form mineral-added gypsum particleboards. Mechanical, physical, and chemical properties of the boards were tested. The increasing mineral content was found to improve the water absorption properties but the increased amount of gypsum in the mixture negatively affected the thickness swelling and water absorption properties. The usage of dolomite mineral in the board composition increased the internal bond properties and higher than the standard of 0,28 MPa. However, all types of boards had modulus of elastic, modulus of rupture and thermal conductivity results values below the standards. Moreover, the thermal conductivity values decreased in all board types because of the reduction of the mineral dolomite. Thermal gravimetric analysis, Fourier transform infrared spectrometry tests were applied to examine the thermal and flame retardancy properties of inorganic materials, wood-gypsum composites, which are used at different rates for synergistic effect. The gypsum and dolomite amount affected the thermal variation, whereas the increment in the weight of the wood particles also increased the thermal degradation. It was determined that stresses at 850-980 cm-1 reveal Ca-O and Mg-O, reveal at 881cm-1 C-OH, weak vibration at 1619 cm-1 and a strong bond structure in the 1445-950-882 cm-1 bands. These bands express the characteristic presence of the CaO and MgO belonging to dolomite. The study demonstrated the feasibility of producing mineral-based gypsum board products using wood chips.

Mehmet Akif Ersoy Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2019

The change in the dimension (Thickness Swelling; TS) was found to be high, at high boric acid con... more The change in the dimension (Thickness Swelling; TS) was found to be high, at high boric acid content for boards made from Office paper/Newspaper (O/N) and Office paper/Old Corrugated Container (O/C) types. However, the boards made with 10% boric acid exhibits higher Modulus of Rupture (MOR) values than boards made with 5.0% boric acid. The highest value of MOR was found as 7.93 MPa with the addition of 10% boric acid with Newspaper/Old Corrugated Containers (3:1 by weight) mixtures. The Modulus of Elasticity (MOE) of the boards generally decreased with increasing boric acid content from 5% to 10% in furnishes. The Office paper/Newspaper had the highest MOE among the all formulations and considerable higher than standard value of 600 MPa. However, the highest value of MOE was found as 735.63 MPa with the mixture of 3:1 (by weight) proportions of Office paper/Newspaper proportions. The similar results were observed for Internal Bond (IB) properties of boards, as like MOE. While in general, increasing boric acid content from 5.0 to 10%, negative effects on IB properties of boards. It was also realized that the boric acid content and fiber proportions effects various level on thermal properties (thermal conductivity; TC). The boric acid had usually provided higher thermal resistance, but the difference between fiber proportions and fiber types consisting of boric acid was important. However, the lowest TC value of 0.1455 W/mK was found the boards made from only old corrugated containers fibers with 10% BA content. The sound absorption values of boards made from secondary fibers show a sound damping that it was steady increase up to 1600 Hz and then decreasing. It could be realized that the sound absorption properties of boards were generally better than that of in lower frequencies.

The heat transfer coefficient values of 0.250 W/mK and : 0.261 W/mK were found for Type 1 boards... more The heat transfer coefficient values of 0.250 W/mK and : 0.261 W/mK were found for Type 1 boards (bark based experimental boards of XB I and YB V) and : 0.321 W/mK and : 0.311 W/mK were found for Type 2 boards (cone based experimental boards of XC V and YC II), respectively. But all these are lower than standard value of 0.065 W/mK. However, visual evaluation show that all samples have low flame spreading properties which did not reach the threshold limit of 150 mm under a single flame combustion test. All Type 1 boards show lower mass loss (w, %) than control sample (B 0 : 11.97%), regardless of mineral additive type and proportions. The lowest mass loss of 6.36% was obtained with sample of YB IV. It is noticeable that olivine-cone (YC) and olivinebark (YB) based panels usually show lower mass loss than dolomite-cone and dolomite-bark based panels at similar experimental conditions. The surface burning tests clearly indicate that the both mineral additions have lowering effects on burning feature of boards. This is probably olivine and dolomite could be absorbing heat and release water. Hence the burning area might become colder during evaporation of water with increasing charring and improve insulation of materials. The heat insulation levels of boards have found to be closely related with mineral content. But olivine seems to more effective for improving insulation properties for Type 1 boards. It is also found that both type panels (Type 1 and 2) which prepared from various proportions of dolomite and olivine as additives (10-50%) were show higher resistance against thermal degradation than control panels which prepared only (100%) from lignocellulosic material (cone and bark).

The aim of this study was to investigate experimental panels produced from mixture of agriculture... more The aim of this study was to investigate experimental panels produced from mixture of agriculture wastes with mineral adducts under synthetic adhesive bonding process. In this respect, the effects of the two different mineral loading as reinforced additive (olivine and dolomite) in lignocellulosic matrix (agricultural residue of tomato-and eggplant stalk chips) system were investigated. The highest heat conductivity value of : 0.461 W/mK and 0.449 W/mK was found on panels that made only from tomato stalk-and eggplant stalk chips (controls) while lowering effects were found when dolomite and olivine added to matrix at various proportions. But all heat conductivity value were found to be lower than standard value (: <0.065 W/mK). However, all the experimental panels show the burning pattern on the surfaces which char did not reach the 150 mm threshold limit, regardless of board formulations or experimental conditions. It could be proposed that proportions of olivine and dolomite as reinforcing element in lignocellulosic matrix have a lowering effects on flame spreading at certain extent. It is notable that mass loss (%) properties of samples were found to be quite different from the insulation values. For dolomite-based panels, the lowest mass loss values were found to be 8.83% and 9.97% for boards prepared from similar proportion (1:1, w/w, %) of dolomite-tomato stalk chips (XT V) and dolomite-eggplant stalk chips (XE V), respectively. For dolomite-based panels, the lowest mass loss of 6.79% and 9.11% were found to be boards Original Research Article

Maderas-Cienc Tecnol, 2022

Red pine (Pinus brutia) wood particles and dolomite mineral were used in varying proportions to f... more Red pine (Pinus brutia) wood particles and dolomite mineral were used in varying proportions to form mineral-added gypsum particleboards. Mechanical, physical, and chemical properties of the boards were tested. The increasing mineral content was found to improve the water absorption properties but the increased amount of gypsum in the mixture negatively affected the thickness swelling and water absorption properties. The usage of dolomite mineral in the board composition increased the internal bond properties and higher than the standard of 0,28 MPa. However, all types of boards had modulus of elastic, modulus of rupture and thermal conductivity results values below the standards. Moreover, the thermal conductivity values decreased in all board types because of the reduction of the mineral dolomite. Thermal gravimetric analysis, Fourier transform infrared spectrometry tests were applied to examine the thermal and flame retardancy properties of inorganic materials, wood-gypsum composites, which are used at different rates for synergistic effect. The gypsum and dolomite amount affected the thermal variation, whereas the increment in the weight of the wood particles also increased the thermal degradation. It was determined that stresses at 850-980 cm-1 reveal Ca-O and Mg-O, reveal at 881cm-1 C-OH, weak vibration at 1619 cm-1 and a strong bond structure in the 1445-950-882 cm-1 bands. These bands express the characteristic presence of the CaO and MgO belonging to dolomite. The study demonstrated the feasibility of producing mineral-based gypsum board products using wood chips.

Journal of Applied Life Sciences International

The boards made from wood and secondary fibers appear to be well correlated secondary fiber/wood ... more The boards made from wood and secondary fibers appear to be well correlated secondary fiber/wood fiber proportions in terms of the behavior of the sound acoustic properties. However, boards were generally shown better acoustic (sound absorption) properties in high frequencies. Moreover, at middle level frequencies and lower boric acid addition (5.0%), the boards made from equal proportion of wood and secondary Old Corrugated Containers (OCC) and newspaper fibers shows markedly improved acoustic properties. However, the boric acid addition had only marginal effects on relative thermal resistance values either improve or increase thermal properties, vice versa. It was observed that both the secondary Original Research Article

Gümüşhane Üniversitesi Fen Bilimleri Enstitüsü Dergisi

Öz Mekanik özellikler malzemelerin dayanımını ve kullanım alanlarını belirleyen en önemli etkenle... more Öz Mekanik özellikler malzemelerin dayanımını ve kullanım alanlarını belirleyen en önemli etkenlerdir. Bir ağaç malzemenin hangi malzeme grubunda olduğu ve hangi ağaç türü olduğu mekanik özelliklerine bakılarak bilinebilmektedir. Bu çalışmada ticareti yapılan kızılağaç (Alnus glutinosa subsp. Barbata), doğu kayını (Fagus orientalis Lipsky), karakavak (Populus nigra), ceviz (Juglans regia), meşe (Quercus robur), kestane (Castena sativa), sedir (Cedrus libani) ve çam (Pinus) gibi önemli bazı ağaç türlerinin mekanik özellikleri yapay sinir ağları ile modellenmiştir. Bu çalışma, herhangi bir konstrüksiyon için ihtiyaç duyulan mekanik özellikleri karşılayacak ideal ağaç malzemenin tespitinde yardımcı olacaktır. Böylece bilimsel çalışmalarda ve ticarette ağaç türü ile ilgili sınıflandırmalar daha etkin bir şekilde yapılabilecektir.

Rapidly evolving technology brings innumerable innovations that make human life easier. Because o... more Rapidly evolving technology brings innumerable innovations that make human life easier. Because of the electromagnetic field produced by all kinds of device developed, it affects the human nature negatively in the long run. When a living organism is exposed to electromagnetic fields in the frequency range of 10 kHz -3 GHz, ion balance will be impaired and cell renewal will be negatively affected if the duration of action is prolonged. For this reason, it is necessary to develop mater ials that can minimize the loss without wasting time. For this purpose, the electromagnetic shielding ability at 900 MHz, 1800 MHz, 2100 MHz and 2400 MHz frequencies was quantified by coating the wood composite materials which we used widely in daily life with copper conductor.

It was realized that both boric acid (BA) and secondary fibers (S) from Old Corrugated Container ... more It was realized that both boric acid (BA) and secondary fibers (S) from Old Corrugated Container (OCC) negative impact on thickness swelling (TS) properties of boards in water. However, the highest Modulus of Elasticity (MOE) values of both type boards were found at 90/10 Wood/Secondary fiber (W/S) ratio with values of 2966 MPa and 1009 MPa, respectively. It is clear that increasing secondary fiber content effects on lowering MOE values in some level. However, except of the boards of B10 and B10a which produced only from secondary fibers, all other experimental boards show higher MOE than standard value of 600 MPa. The secondary fibers from recycled OCC can be useful for improving sound (acoustic) properties some level. Interestingly, the highest sound absorption (SA) coefficient of 0.91 and 0.81 were also found at 90/10 (W/S) mixture, respectively.

Cesitli iletken mineraller ile islem goren lif levha kompozit malzemeler yuksek ekranlama ozellig... more Cesitli iletken mineraller ile islem goren lif levha kompozit malzemeler yuksek ekranlama ozelligi ve kolay endustrilesme ozelligi nedeniyle yaygin kullanima uygundurlar. Teknolojik gelismeler ile birlikte artan elektromanyetik kirlilik insan sagligini tehdit etmektedir. Elektromanyetik alana uzun sure maruz kalindiginda dokulara zarar vermekte ve zamanla kansere sebep olmaktadir. Elektromanyetik alanin istenmeyen zararlarindan korunmak zorunluluk haline gelmistir. Bu calismada mineral katkili odun liflerinden levha tasarlanmasi hedeflenmistir. Bu amacla calismada mineral katkili odun lifi esasli kompozit malzemelerin 300MHz, 900 MHz, 1800 MHz, 2100 MHz ve 2400 MHz frekanslarinda elektromanyetik ekranlama yetenegi sayisal olarak belirlenmistir. Deneysel sonuclar, mineral tozlarla (BaSO 4 , C, Fe 2 O 3 , NiSO 4 ) odun lifi esasli levhalarin elektromanyetik koruma etkinliginin kabul edilebilir seviyelerde oldugunu gostermektedir.

Tetra Pak ambalajlari, kullanimlari sonrasinda cevre kirliligi olusturmaktadir. Tetra Pak ambalaj... more Tetra Pak ambalajlari, kullanimlari sonrasinda cevre kirliligi olusturmaktadir. Tetra Pak ambalajinda bulunan % 5 oraninda aluminyumun (Al) geri kazanilmasi hem cevre hem de ekonomik degeri acisindan onemlidir. Al iletken metal olup yaygin bir sekilde bakir gibi elektromanyetik girisimin sogurulmasi icin kullanilabilmektedir. Gelisen teknoloji ile birlikte kullanimi artan elektrikli ve elektronik cihazlarin olusturdugu elektromanyetik alanlar parazite sebep olur. Ayni zamanda uzun sure maruz kalindiginda insan sagligina zararli etkileri bulunmaktadir. Bu nedenle elektromanyetik girisimi soguran malzemelere ihtiyac bulunmaktadir. Bu calismada Tetra Pak ambalajlarinin geri donusumunden elektromanyetik girisimi soguran kompozit malzeme yapilmistir. Proses asamasinda geri donusumden kazanilan Al folyo % 5-10-20-30 oraninda katkilanarak dort tip orta yogunluklu kompozit levha yapilmistir. Isi-basinc islemi sonucu olusan kompozit malzeme tamamen geri donusum elemanlarindan (%75 kâgit, %...

BioResources

The physical and mechanical properties of thermally modified wood impregnated with linseed oil we... more The physical and mechanical properties of thermally modified wood impregnated with linseed oil were investigated to find the relationship between the treatment and the acoustic properties. The samples were impregnated with linseed oil (LO). Heat treatment was performed in an oven at four different temperatures, namely 160, 180, 210, and 240 °C. Statistically, the physical, mechanical, and acoustic properties of the treated wood were significantly intensified as compared to the control samples. The physical properties (water absorption) of the treated wood decreased by 72% as compared to the control group. However, while the increase in both MOR and MOE at 240 °C was 13%, the increase in CS at 240 °C was 7%. As a result of the heat treatment, the porosity increased by 33% as compared to the control group. At 240 °C the maximum SAC value was observed to be 0.71 at 5000 Hz and at 4500 Hz 0.78 and 0.80, respectively. The highest STL value, which was 69.9 dB, was observed at 1540 Hz and ...

Journal of Engineering Research and Reports, 2022

Olivine and dolomite addition with some formulations clearly retarded the water absorption change... more Olivine and dolomite addition with some formulations clearly retarded the water absorption change in both bark (Type 1 boards) and cone (Type 2 boards) based experimental panels. However, the lowest water absorption value of 15.20% was found in dolomite contain (40:60, dolomite-bark chip, w/w, %) sample which show approximately 169.6% lower than olivine contain sample at similar proportions. However, it is important to note that Type 1 boards show considerably lower water absorption than Type 2 boards at similar experimental conditions. The boards which produced with 10-, 20-, and 30% dolomite and 90-, 80-, 70% bark chips (XBI, XBII and XBIII) proportions, show higher thickness swelling (TS, %) than control (B0) while rest of show lower TS than control samples, regardless of type of mineral or experimental conditions. The highest TS improvement of -79.1% was found with sample of YBV which produced with equally (1:1, w/w) proportions olivine and pine cone chips in matrix. It is notic...

Asian Journal of Chemical Sciences, 2022

The aim of this study was to investigate experimental panels produced from mixture of agriculture... more The aim of this study was to investigate experimental panels produced from mixture of agriculture wastes with mineral adducts under synthetic adhesive bonding process. In this respect, the effects of the two different mineral loading as reinforced additive (olivine and dolomite) in lignocellulosic matrix (agricultural residue of tomato- and eggplant stalk chips) system were investigated. The highest heat conductivity value of l: 0.461 W/mK and 0.449 W/mK was found on panels that made only from tomato stalk- and eggplant stalk chips (controls) while lowering effects were found when dolomite and olivine added to matrix at various proportions. But all heat conductivity value were found to be lower than standard value (l: <0.065 W/mK). However, all the experimental panels show the burning pattern on the surfaces which char did not reach the 150 mm threshold limit, regardless of board formulations or experimental conditions. It could be proposed that proportions of olivine and dolomit...

Mehmet Akif Ersoy Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2020

Lignocellulosic waste of eggplant and tomato stalks has used with minerals of olivine and dolomit... more Lignocellulosic waste of eggplant and tomato stalks has used with minerals of olivine and dolomit at various proportions to produce experimental particleboards that have subject to some physical and mechanical tests. In this regards, Thickness Swelling in water (TS, %), Water Absorption (WA, %), Internal Bond (IB), Bending Strength (MOR), Modulus of Elasticity (MOE) and color properties (CIE,L,a,b) of the boards were examined. It has observed that type and content of minerals effects TS and WA of test panels. Besides the internal bond strength values of the test boards that were generally higher than 0.28 N/mm 2 , it was found that the bending resistance properties of the boards produced with tomato stalk/dolomite mixture show higher MOR values in similar manufacturing conditions than those produced with olivine. However, boards prepeared from tomato/eggplant stalks proportions with dolomite/olivine mixture sho lower MOE values than the standard value in all production conditions.

Mehmet Akif Ersoy Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2019

Due to the growing environmental concern, lignocellulosic materials have become a common substitu... more Due to the growing environmental concern, lignocellulosic materials have become a common substitute for the conventional reinforcement element in composite strcutures. However, these natural sources are preferred to cost efficient and to increase mechanical performances. In a cement bonded composites, wood is incorporated as an aggregate in the mineral matrix (as fibres, sawdust, shavings or particles), and cement acts as a binder. These are employed due to their ease of production, and the enhanced biodegradability, leading to applications for sustainable purposes in construction applications. Wood-cement composites are considerably better performance on high fire, weathering and bio-deterioration risk applications to which solid wood and resin bonded composites are vulnerable. However, the vast of literature on cement-wood bonded composites has already been reviewed and pointed by a number of researchers. Many valuable fundamental informations have already established for utilizing wood for these products. A comprehensive results was to investigate some wood species that are abundant resources in many countries, for their suitability for manufacturing such composites.

Mehmet Akif Ersoy Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2018

Elektronik endüstrisinin büyümesinin ve haberleşme, otomasyon, biyomedikal, uzay ve diğer alanlar... more Elektronik endüstrisinin büyümesinin ve haberleşme, otomasyon, biyomedikal, uzay ve diğer alanlardaki yaygın kullanımının etkisi birçok elektromanyetik girişim sorununa yol açmaktadır. Elektromanyetik girişim bir elektronik cihazın, başka bir elektronik cihazdan kaynaklanan, radyo frekansı spektrumunda bir elektromanyetik alanın yakınında çalışmasıyla ortaya çıkan bozulmadır. Bu bozulma elektronik cihazları etkilediği gibi insan sağlığını da etkilemektedir. Bu nedenle, elektromanyetik girişimin olumsuz etkilerinden etkili bir şekilde korunma ihtiyacı ortaya çıkmaktadır. Bu makalede, yönlendirilmiş yonga levha ile bakır levha karma kompozit malzeme olarak kullanılmıştır. Yönlendirilmiş yonga levhanın ara yüzeyi ile yüzeyi bakır folyo ile kaplanarak metal kafes oluşturulmuştur. Bakır folyo kaplı yönlendirilmiş yonga levhanın 1.88 GHz ile 2.62 GHz ve 5.20 GHz ile 5.62 GHz frekansları arasında elektromanyetik soğurma etkinliğinin kabul edilebilir düzeyde olduğu görülmüştür.

American Chemical Science Journal, 2016

The boards made from wood and secondary fibers appears to be well correlated secondary fiber/wood... more The boards made from wood and secondary fibers appears to be well correlated secondary fiber/wood fiber proportions in terms of the behavior of the sound acoustic properties. However, boards were generally shown better acoustic (sound absorption) properties in high frequencies. Moreover, at middle level frequencies and lower boric acid addition (5.0%), the boards made from equal proportion of wood and secondary Old Corrugated Containers (OCC) and newspaper fibers shows markedly improved acoustic properties. However, the boric acid addition had only marginal effects on relative thermal resistance values either improve or increase thermal properties, vice versa. It was observed that both the secondary fiber ratio contributes to the control of the relative thermal resistance values, and that under certain experimental conditions thermal resistance value of as low as 0.140 W/mK can be achieved. It was also found that increasing boric acid content negative impact on thermal degradation that decomposition temperature was increased for boards in all boric acid conditions. This is an important result considering boric acid affects improving board's thermal resistance some level. However, the endothermic peaks at 71 ºC, 266 ºC and 333 ºC for Differential Scanning Calorimetry (DSC) have clearly consisted with Thermogravimetric Analysis (TGA) curves.

Erzincan Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2019

Knowing the mechanical and physical properties of a material is the most important criteria for e... more Knowing the mechanical and physical properties of a material is the most important criteria for engineers and designers interested in determining the intended use of the material. The prediction of wood composite materials based on their mechanical and physical properties plays an important role in their future application. In this study, radial basis function network approach was employed for prediction according to mechanical and physical properties of wood composite materials such as particleboard, fiberboard, oriented strand board and plywood, which have widespread use in the furniture industry and construction sector. Four physical and mechanical properties were used as the board density, bending strength, bending elastic modulus and tensile strength in the prediction of the wood composite materials. This study will assist wood composite users in the selection of wood composite materials that will provide the mechanical and physical properties determined in advance for any construction. Moreover, the present study will fill this gap in literature.

Maderas. Ciencia y tecnología

Red pine (Pinus brutia) wood particles and dolomite mineral were used in varying proportions to f... more Red pine (Pinus brutia) wood particles and dolomite mineral were used in varying proportions to form mineral-added gypsum particleboards. Mechanical, physical, and chemical properties of the boards were tested. The increasing mineral content was found to improve the water absorption properties but the increased amount of gypsum in the mixture negatively affected the thickness swelling and water absorption properties. The usage of dolomite mineral in the board composition increased the internal bond properties and higher than the standard of 0,28 MPa. However, all types of boards had modulus of elastic, modulus of rupture and thermal conductivity results values below the standards. Moreover, the thermal conductivity values decreased in all board types because of the reduction of the mineral dolomite. Thermal gravimetric analysis, Fourier transform infrared spectrometry tests were applied to examine the thermal and flame retardancy properties of inorganic materials, wood-gypsum composites, which are used at different rates for synergistic effect. The gypsum and dolomite amount affected the thermal variation, whereas the increment in the weight of the wood particles also increased the thermal degradation. It was determined that stresses at 850-980 cm-1 reveal Ca-O and Mg-O, reveal at 881cm-1 C-OH, weak vibration at 1619 cm-1 and a strong bond structure in the 1445-950-882 cm-1 bands. These bands express the characteristic presence of the CaO and MgO belonging to dolomite. The study demonstrated the feasibility of producing mineral-based gypsum board products using wood chips.

Mehmet Akif Ersoy Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2019

The change in the dimension (Thickness Swelling; TS) was found to be high, at high boric acid con... more The change in the dimension (Thickness Swelling; TS) was found to be high, at high boric acid content for boards made from Office paper/Newspaper (O/N) and Office paper/Old Corrugated Container (O/C) types. However, the boards made with 10% boric acid exhibits higher Modulus of Rupture (MOR) values than boards made with 5.0% boric acid. The highest value of MOR was found as 7.93 MPa with the addition of 10% boric acid with Newspaper/Old Corrugated Containers (3:1 by weight) mixtures. The Modulus of Elasticity (MOE) of the boards generally decreased with increasing boric acid content from 5% to 10% in furnishes. The Office paper/Newspaper had the highest MOE among the all formulations and considerable higher than standard value of 600 MPa. However, the highest value of MOE was found as 735.63 MPa with the mixture of 3:1 (by weight) proportions of Office paper/Newspaper proportions. The similar results were observed for Internal Bond (IB) properties of boards, as like MOE. While in general, increasing boric acid content from 5.0 to 10%, negative effects on IB properties of boards. It was also realized that the boric acid content and fiber proportions effects various level on thermal properties (thermal conductivity; TC). The boric acid had usually provided higher thermal resistance, but the difference between fiber proportions and fiber types consisting of boric acid was important. However, the lowest TC value of 0.1455 W/mK was found the boards made from only old corrugated containers fibers with 10% BA content. The sound absorption values of boards made from secondary fibers show a sound damping that it was steady increase up to 1600 Hz and then decreasing. It could be realized that the sound absorption properties of boards were generally better than that of in lower frequencies.

The heat transfer coefficient values of 0.250 W/mK and : 0.261 W/mK were found for Type 1 boards... more The heat transfer coefficient values of 0.250 W/mK and : 0.261 W/mK were found for Type 1 boards (bark based experimental boards of XB I and YB V) and : 0.321 W/mK and : 0.311 W/mK were found for Type 2 boards (cone based experimental boards of XC V and YC II), respectively. But all these are lower than standard value of 0.065 W/mK. However, visual evaluation show that all samples have low flame spreading properties which did not reach the threshold limit of 150 mm under a single flame combustion test. All Type 1 boards show lower mass loss (w, %) than control sample (B 0 : 11.97%), regardless of mineral additive type and proportions. The lowest mass loss of 6.36% was obtained with sample of YB IV. It is noticeable that olivine-cone (YC) and olivinebark (YB) based panels usually show lower mass loss than dolomite-cone and dolomite-bark based panels at similar experimental conditions. The surface burning tests clearly indicate that the both mineral additions have lowering effects on burning feature of boards. This is probably olivine and dolomite could be absorbing heat and release water. Hence the burning area might become colder during evaporation of water with increasing charring and improve insulation of materials. The heat insulation levels of boards have found to be closely related with mineral content. But olivine seems to more effective for improving insulation properties for Type 1 boards. It is also found that both type panels (Type 1 and 2) which prepared from various proportions of dolomite and olivine as additives (10-50%) were show higher resistance against thermal degradation than control panels which prepared only (100%) from lignocellulosic material (cone and bark).

The aim of this study was to investigate experimental panels produced from mixture of agriculture... more The aim of this study was to investigate experimental panels produced from mixture of agriculture wastes with mineral adducts under synthetic adhesive bonding process. In this respect, the effects of the two different mineral loading as reinforced additive (olivine and dolomite) in lignocellulosic matrix (agricultural residue of tomato-and eggplant stalk chips) system were investigated. The highest heat conductivity value of : 0.461 W/mK and 0.449 W/mK was found on panels that made only from tomato stalk-and eggplant stalk chips (controls) while lowering effects were found when dolomite and olivine added to matrix at various proportions. But all heat conductivity value were found to be lower than standard value (: <0.065 W/mK). However, all the experimental panels show the burning pattern on the surfaces which char did not reach the 150 mm threshold limit, regardless of board formulations or experimental conditions. It could be proposed that proportions of olivine and dolomite as reinforcing element in lignocellulosic matrix have a lowering effects on flame spreading at certain extent. It is notable that mass loss (%) properties of samples were found to be quite different from the insulation values. For dolomite-based panels, the lowest mass loss values were found to be 8.83% and 9.97% for boards prepared from similar proportion (1:1, w/w, %) of dolomite-tomato stalk chips (XT V) and dolomite-eggplant stalk chips (XE V), respectively. For dolomite-based panels, the lowest mass loss of 6.79% and 9.11% were found to be boards Original Research Article

Maderas-Cienc Tecnol, 2022

Red pine (Pinus brutia) wood particles and dolomite mineral were used in varying proportions to f... more Red pine (Pinus brutia) wood particles and dolomite mineral were used in varying proportions to form mineral-added gypsum particleboards. Mechanical, physical, and chemical properties of the boards were tested. The increasing mineral content was found to improve the water absorption properties but the increased amount of gypsum in the mixture negatively affected the thickness swelling and water absorption properties. The usage of dolomite mineral in the board composition increased the internal bond properties and higher than the standard of 0,28 MPa. However, all types of boards had modulus of elastic, modulus of rupture and thermal conductivity results values below the standards. Moreover, the thermal conductivity values decreased in all board types because of the reduction of the mineral dolomite. Thermal gravimetric analysis, Fourier transform infrared spectrometry tests were applied to examine the thermal and flame retardancy properties of inorganic materials, wood-gypsum composites, which are used at different rates for synergistic effect. The gypsum and dolomite amount affected the thermal variation, whereas the increment in the weight of the wood particles also increased the thermal degradation. It was determined that stresses at 850-980 cm-1 reveal Ca-O and Mg-O, reveal at 881cm-1 C-OH, weak vibration at 1619 cm-1 and a strong bond structure in the 1445-950-882 cm-1 bands. These bands express the characteristic presence of the CaO and MgO belonging to dolomite. The study demonstrated the feasibility of producing mineral-based gypsum board products using wood chips.

Journal of Applied Life Sciences International

The boards made from wood and secondary fibers appear to be well correlated secondary fiber/wood ... more The boards made from wood and secondary fibers appear to be well correlated secondary fiber/wood fiber proportions in terms of the behavior of the sound acoustic properties. However, boards were generally shown better acoustic (sound absorption) properties in high frequencies. Moreover, at middle level frequencies and lower boric acid addition (5.0%), the boards made from equal proportion of wood and secondary Old Corrugated Containers (OCC) and newspaper fibers shows markedly improved acoustic properties. However, the boric acid addition had only marginal effects on relative thermal resistance values either improve or increase thermal properties, vice versa. It was observed that both the secondary Original Research Article

Gümüşhane Üniversitesi Fen Bilimleri Enstitüsü Dergisi

Öz Mekanik özellikler malzemelerin dayanımını ve kullanım alanlarını belirleyen en önemli etkenle... more Öz Mekanik özellikler malzemelerin dayanımını ve kullanım alanlarını belirleyen en önemli etkenlerdir. Bir ağaç malzemenin hangi malzeme grubunda olduğu ve hangi ağaç türü olduğu mekanik özelliklerine bakılarak bilinebilmektedir. Bu çalışmada ticareti yapılan kızılağaç (Alnus glutinosa subsp. Barbata), doğu kayını (Fagus orientalis Lipsky), karakavak (Populus nigra), ceviz (Juglans regia), meşe (Quercus robur), kestane (Castena sativa), sedir (Cedrus libani) ve çam (Pinus) gibi önemli bazı ağaç türlerinin mekanik özellikleri yapay sinir ağları ile modellenmiştir. Bu çalışma, herhangi bir konstrüksiyon için ihtiyaç duyulan mekanik özellikleri karşılayacak ideal ağaç malzemenin tespitinde yardımcı olacaktır. Böylece bilimsel çalışmalarda ve ticarette ağaç türü ile ilgili sınıflandırmalar daha etkin bir şekilde yapılabilecektir.

Rapidly evolving technology brings innumerable innovations that make human life easier. Because o... more Rapidly evolving technology brings innumerable innovations that make human life easier. Because of the electromagnetic field produced by all kinds of device developed, it affects the human nature negatively in the long run. When a living organism is exposed to electromagnetic fields in the frequency range of 10 kHz -3 GHz, ion balance will be impaired and cell renewal will be negatively affected if the duration of action is prolonged. For this reason, it is necessary to develop mater ials that can minimize the loss without wasting time. For this purpose, the electromagnetic shielding ability at 900 MHz, 1800 MHz, 2100 MHz and 2400 MHz frequencies was quantified by coating the wood composite materials which we used widely in daily life with copper conductor.

It was realized that both boric acid (BA) and secondary fibers (S) from Old Corrugated Container ... more It was realized that both boric acid (BA) and secondary fibers (S) from Old Corrugated Container (OCC) negative impact on thickness swelling (TS) properties of boards in water. However, the highest Modulus of Elasticity (MOE) values of both type boards were found at 90/10 Wood/Secondary fiber (W/S) ratio with values of 2966 MPa and 1009 MPa, respectively. It is clear that increasing secondary fiber content effects on lowering MOE values in some level. However, except of the boards of B10 and B10a which produced only from secondary fibers, all other experimental boards show higher MOE than standard value of 600 MPa. The secondary fibers from recycled OCC can be useful for improving sound (acoustic) properties some level. Interestingly, the highest sound absorption (SA) coefficient of 0.91 and 0.81 were also found at 90/10 (W/S) mixture, respectively.

Red pine (Pinus brutia) wood particles and dolomite mineral were used in varying proportions to f... more Red pine (Pinus brutia) wood particles and dolomite mineral were used in varying proportions to form mineral-added gypsum particleboards. Mechanical, physical, and chemical properties of the boards were tested. The increasing mineral content was found to improve the water absorption properties but the increased amount of gypsum in the mixture negatively affected the thickness swelling and water absorption properties. The usage of dolomite mineral in the board composition increased the internal bond properties and higher than the standard of 0,28 MPa. However, all types of boards had modulus of elastic, modulus of rupture and thermal conductivity results values below the standards. Moreover, the thermal conductivity values decreased in all board types because of the reduction of the mineral dolomite. Thermal gravimetric analysis, Fourier transform infrared spectrometry tests were applied to examine the thermal and flame retardancy properties of inorganic materials, wood-gypsum composites, which are used at different rates for synergistic effect. The gypsum and dolomite amount affected the thermal variation, whereas the increment in the weight of the wood particles also increased the thermal degradation. It was determined that stresses at 850-980 cm-1 reveal Ca-O and Mg-O, reveal at 881cm-1 C-OH, weak vibration at 1619 cm-1 and a strong bond structure in the 1445-950-882 cm-1 bands. These bands express the characteristic presence of the CaO and MgO belonging to dolomite. The study demonstrated the feasibility of producing mineral-based gypsum board products using wood chips.