Design of Natural Fiber Reinforced Polymer Composite (original) (raw)
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This paper gives an overview of the production and application of polymer materials based on renewable raw materials – biopolymers. It is pointed out that, investment of resources in the study of renewable raw materials in the last twenty years has led to the improvement of old and development of completely new chemical and biochemical processes for using biomass for the production of low molecular weight chemical substances, and especially for the production of biopolymers, which are biodegradable and compostable, and biopolymers which are nonbiodegradable. In the same period, producers of polymers based on fossil raw materials have also developed biopolymers that are biodegradable and some of them compostable and, most important, compatible with biopolymers based on renewable raw materials. The facts considering the state of biopolymers based on renewable raw materials on the market, and prediction of production increase over the next five years are also stated. Additionally, the ...
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In Vojvodina, where crop husbandry is the most widespread agricultural production, straw/shells combustion represents a perspective way for renewable energy and there is a serious interest from farmers for biomass utilization for energy purposes. The average yearly biomass wastes in Vojvodina make 9 million tons only in the agriculture. The energetic use of the post-harvest residues is the technological combustion process by which large amount of ash is generated. These ashes are, in Serbia, either used as a fertilizer or disposed on the landfills, occupying valuable land and polluting the environment. This paper provides data on the availability of biomass ashes in Vojvodina and experimental analysis of their possible application as an mineral additive in cement-based composites. This research is supported by IPA Interreg project-Agricultural Waste-Challenges and Business Opportunities.
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Utilization of wood powder is one of the alternative in waste wood prevention which has not been optimally utilized. Utilization of bionanofiller based on wood waste such as wood powder can also reduce dependence on raw materials such as silica, clay, bentonite, zeolite which diminished its existence. The sample used in this study is Meranti wood powder which is then prepared and characterized. The characterization of bionanofiller waste of Meranti wood powder is done by analyzing particle density, XRD, SEM, and FTIR. Particle density analysis showed Meranti wood powder having density of 0,044 gr/cm 3. XRD analysis shows that the maximum peak at an angle of 2θ = 22,2 o indicates the presence of carbon phase. The results of SEM analysis of Meranti wood powder are suitable for use as fillers because they are 1 μm in size. The result of functional group analysis shows the presence of functional groups-OH,-CH3,-CH2
Drvna Industrija, 2013
Besides its inherent resistance against degrading organisms, the durability of timber is infl uenced by design details and climatic conditions, making it diffi cult to treat wood durability as an absolute value. Durability classifi cation is, therefore, based on comparing performance indicators between the timber in question and a reference timber. These relative values are grouped and related to durability classes, which can refer to a high range of service-lives. The insuffi cient comparability of such durability records has turned out to be a key challenge for service-life prediction. This paper reviewed literature data, based on service-life measures, not masked by a durability classifi cation. It focused on natural durability of timber tested in the fi eld above-ground. Additionally, results from ongoing aboveground durability studies in Europe and Australia are presented and have been used for further analysis. In total, 163 durability recordings from 31 different test sites worldwide based on ten different test methods have been considered for calculation of resistance factors. The datasets were heterogeneous in quality and quantity; the resulting resistance factors suffered from high variation. In conclusion, an open platform for scientifi c exchange is needed to increase the amount of available service-life related data.
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Son yıllarda farklı endüstriyel uygulamalar için geleneksel polimer kompozitlerin yerine yenilenebilir kaynakların kullanımına olan ilgi artmaktadır. En az bir bileşen biyobazlı veya biyobozunur olan polimer kompozitlere biyokompozit adı verilmektedir. Son zamanlarda bitki liflerinin sahip oldukları mekanik, termal, optik ve biyobozunurluk gibi benzersiz özellikleri sebebiyle biyokompozit ürünlerdekullanılmaktadır. Bu malzemelere olan yüksek ilginin bir diğer nedeni ise ucuz ve düşük ortam etkisine sahip olmalarıdır. Bitki liflerinin bol miktarda bulunabilirliği ve erişilebilirliği ortaya çıkan yeni ilginin ana nedenleridir. Doğal kaynaklardan oluşan yüksek performanslı malzemeler sayesinde, malzeme bilimi alanındaki biyoteknolojide önemli kazanımlar dünya çapında artış göstermektedir. Bunlara ilaveten, dünyadaki çevre sorunlarına karşı artanfarkındalık, araştırmacıları ve üreticileri biyokompozit malzemeler alanında çaba göstermeye yöneltmektedir. Bu kapsamda farklı polimerlerl...
İleri Teknoloji Bilimleri Dergisi, 2017
Wood is an excellent engineering material with its light weight and high mechanical properties, and has been used for furniture production from the early ages of humankind. However, its susceptibility to biodegradation due to its hygroscopic nature and chemical composition limits usage of wood as outdoor furniture. For the outdoor utilization, chemical modification methods may provide long service-life to the products. Water repellence and dimensional stability can be both improved up to 70% and 40% respectively by inserting hydrophobic molecules inside spruce wood cell walls. Paulownia, Poplar, and Eucalyptus are fast growing trees and their wood has different properties. In this study, a pretty new modification method was carried out by grafting a hydrophobic polymer poly(ε-caprolactone) (PCL) onto economically valuable Paulownia, Poplar, and Eucalyptus wood cell walls. The water absorption, dimensional stability (ASE), equilibrium moisture content (EMC), and density change of poly(εcaprolactone) grafted wood were characterized and found that dimensional stability and water repellence has significantly better compared to references for poplar wood but not for the paulownia and eucalptus.