Biobased particleboards based on rice husk and soy proteins: Effect of the impregnation with tung oil on the physical and mechanical behavior (original) (raw)
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Bioresource Technology, 2010
The main goal of this work was to evaluate the technical feasibility of using rice husk (RH) as wood substitute in the production of environmentally sound medium-density particleboards using adhesives from soybean protein concentrate (SPC). Chemical modification of rice husk with sodium hydroxide and sodium hydroxide followed by hydrogen peroxide (bleaching) were undertaken to evaluate the effect of such treatments on the composition and topology of rice husk and the performance of produced panels. Both treatments were efficient in partially eliminating hemicelluloses, lignin and silica from RH, as evidenced by thermo-gravimetric analysis (TGA). Scanning electron microscopy observations suggested that alkaline treatment resulted in a more damaged RH substrate than bleaching. The dependence of mechanical properties (modulus of rupture, modulus of elasticity, and internal bond) and the physical properties (water absorption and thickness swelling) on chemical treatments performed on both, rice husk and SPC was studied. Bleached-rice husk particleboards bonded with alkaline-treated soybean protein concentrate displayed the best set of final properties. Particleboards with this formulation met the minimum requirements of internal bond, modulus of elasticity and modulus of rupture recommended by the US Standard ANSI/A208.1 specifications for M1, MS and M2-grade medium-density particleboards, but failed to achieve the thickness swelling value recommended for general use panels. This limitation of soybean protein concentrate-bonded rice husk particleboards was counterbalanced by the advantage of being formaldehyde-free which makes them a suitable alternative for indoor applications.
Medium-density particleboards from rice husks and soybean protein concentrate
Journal of Applied Polymer Science, 2007
Rice husks are a valuable agricultural residue produced worldwide with potential applications as a wood substitute in particleboard manufacturing. In this work, the feasibility of producing medium-density particleboards based on waste rice husks bonded with environmentally friendly adhesives from soybean protein concentrate was analyzed. The mechanical properties, internal bond strength, and water resistance of the obtained panels bonded with the homemade soybean protein concentrate adhesives were compared to those of boards glued with commercial adhesives such as phenol-formaldehyde and urea-formaldehyde resins. An alkaline treatment improved the gluing ability of the soybean protein concentrate. The mechanical properties of the alkali-treated soybean protein concentrate were comparable to those determined for panels with urea-formaldehyde. The lower water resistance of the alkali-treated soybean protein concentrate particleboards, compared with that of the formaldehyde-based resins, was counterbalanced by the advantage of being more environmentally sound, which makes them suitable for applications for which the requirements for water resistance are not stringent.
Flexural and tensile properties of biobased rice husk-jute-soybean protein particleboards
Journal of Building Engineering, 2020
Low flexural strength is one of the major drawbacks of most alternative raw materials particleboards. In this sense, we study the effect of incorporating a natural reinforcement, bidirectional jute fabric, on the final properties of particleboard based on rice husk and soy protein-based adhesive. The addition of two jute fabric layers improved significantly the mechanical properties of the particleboards (flexure and tensile) exceeding the ANSI standard established values for medium density particleboards for indoor use, without affecting the water absorption and thickness swelling. Tensile strength values of reinforced boards were also numerically predicted according the rule of mixtures.
Academic Journal of Civil Engineering, 2017
Because the timber market is more and more competitive, the particleboard manufacturers are looked for new sources of vegetal raw material supply. In the same time, the use of healthier, safer and more environmentally friendly materials become a priority in the building sector. In this context, some agricultural byproducts as annual plant stems can be an interesting alternative. In fact these resources are abundant, renewable and safe raw material. Moreover their porous structure gives them interesting properties for building materials such as lightness and thermal insulation capacity. In order to diversify raw material supply sources of a particleboard manufacturer, two agricultural byproducts have been studied: flax shives and sunflower bark. The particleboards are made at a laboratory scale by thermocompression of vegetal raw particles at a target density of 500 kg.m-3. Two particle sizes have been compared in the panels for each agroresource: 0.5-2 mm and 2-5mm. The vegetal particles are bonded by different methods:-without addition of any binder. In that case water is sprayed on the vegetal particles before the forming process at 80% w/w. The lignocellulosic compounds contained in the agroresources can act as binders.-with a biosourced binder based on casein, incorporated at different rates with the vegetal particles. The observed mechanical behavior (by bending test and internal bond) for the particleboards can be very different in function of the agroresource, the particle size and the binder used. The different materials are also compared by their thermal properties and their behavior with water. By using a biobased binder the mechanical properties of the particleboards are very better. For all studied properties, panels made with flax shives present better properties than these made with sunflower bark so flax shives seem more suitable for particleboard manufacturing. Butwith optimization of the formulation and the process, both studied agroresources could be used in particleboards for applications as furniture or door panel and efficient 100% biobased panels can be obtained.
Journal of Physics: Conference Series
Research of modifying particle board has been prepared by mixing of pinus merkusii sawdust and rice husk, where used of adhesive base on Boiled Soybean Water (BSW) has been done. The research utilize the rise husk and sawdust pines mixed, and used of a renewable and environmental adhesive to replace the toxic and carcinogenic one. The testing of adhesive included are; colour, pH, solid contain, gelatination time, density and viscosity. Result showed yellowish colour, 10 of pH, 44.70 % of solid contained, 56.29 minutes of gelatination time, and 1.1656 g/cm 3 and 182.4387 cP of viscocity respectively. While the particle boards testing include are density, moisture, immersion, thickness, Modulus of Rapture (MOR) and Modulus of Elasticity (MOE). The particle board best ratio it was 1:4 (Rice husk: pinus merkusii sawdust). Result of each parameter are, 0.7735 g/cm 3 of density, 5.79 % of moisture, however the immersion for 2 hours is 26.90 % and immersion for 24 hours is 39.77 %, 101.1592 kg/cm 2 of MOR and 18,248.3063 kg/cm 2 of MOE. The summary, the adhesive based on SNI 06-4567-1998 and the particle board based on
Physicomechanical Properties of Bio-based Sawdust-Cow Horn-Coconut Husk Particleboards
Journal of The Institution of Engineers (India): Series D, 2022
The physicomechanical properties of bio-based sawdust-cow horn-coconut husk particleboards were determined in the present study. The particleboards were first produced using urea formaldehyde as a binder and thereafter characterized in terms of water absorption, thickness swelling, modulus of rupture (MOR), and modulus of elasticity (MOE). The thickness swelling and water absorption properties were determined at 24 and 48 h. The results of the thickness swelling at 24 and 48 h showed that boards exhibited average values of 0.55 to 1.25% and 1.40 to 2.57%, respectively, while the water absorption at 24 and 48 h gave a result of 0.71 to 1.42% and 1.08 to 2.74%, respectively. The boards also exhibited MOR with average values of 0.54 to 0.98 MPa and 12.97 to 32.37 MPa for MOE. The result shows that both water absorption and thickness swelling after 24 and 48 h decreases with an increase in the blends of sawdust, cow horn, and coconut husk. The physical properties (water absorption, thickness swelling) and mechanical properties (MOR and MOE) meet international standards confirming the strength of the manufactured boards.
Physical and mechanical properties of particleboard manufactured from wood, bamboo and rice husk
Materials Research, 2014
In this work, the physical-mechanical properties of particleboards manufactured with wood (Eucalyptus grandis), bamboo (Bambusa vulgaris) and/or rice husk (Oryza sativa) particles, combined or not, were assessed. They were produced in the following proportions: 100% wood; 100% bamboo; 100% rice; 50% wood and 50% bamboo; 50% wood and 50% rice husk. In order to characterize the manufactured particleboards, their physical (density; moisture content; water absorption and thickness swelling) and mechanical properties (static bending; internal bonding and screw withdrawal) were assessed. The results indicated that the use of rice husk caused reduction in particleboard quality. Particleboards manufactured with bamboo showed better quality than those using rice husk as raw material. For most parameters, the particleboards manufactured exclusively with wood particles showed similar performance to bamboo and wood-bamboo particleboards.
Particleboard Based on Rice Husk: Effect of Binder Content and Processing Conditions
Journal of Renewable Materials, 2017
In the development of materials based on renewable resources, the search for lignocellulosic substitutes for wood is one of the biggest challenges that academia and the particleboard and wood industries are facing. In this article, particleboards were processed using rice husk, an agricultural waste, as a substitute for wood. Rice husk without any further treatment was processed into particleboards using phenol-formaldehyde resin as binder. The effect of the processing parameters, pressure and binder content (BC) on the density, water absorption (WA), thickness swelling (TS), modulus of rupture (MOR) and modulus of elasticity (MOE) was analyzed. The performance of the obtained panels was evaluated in comparison with the US Standard ANSI/ A208.1. Particleboards with 11% of BC met the minimum requirements of MOR and MOE recommended by the ANSI specifications for commercial use, while particleboards with high BC (14%) also accomplished the requirements for industrial use, finding a resourceful use for this agricultural waste.
Jurnal Bahan Alam Terbarukan
Particleboard is a panel product made of wood particles or other lignocellulosic materials added with adhesive then pressed. The development of particleboard manufactured using non wood biomass has become important due to the decreased of wood as main raw material for the particleboard industry. Corn husk (Zea mays L.) and Sembilang bamboo (Dendrocalamus giganteus Munro) are lignocellulosic biomass that has potential as renewable materials for hybrid particleboard. The purposes of this study were to determine the suitability, the effect of adhesive type, and particle composition on physical and mechanical properties of hybrid particleboard made of corn husk and Sembilang bamboo particles. The adhesive types used were urea formaldehyde (UF) and phenol formaldehyde (PF) with 10 wt% adhesive content and the composition of corn husk : Sembilang bamboo was set at 100 : 0, 75 : 25, 50 : 50, 25 : 75, 0 : 100 (% w/w). The target density of hybrid particleboard was set at 0.80 g/cm3. The ...
Journal of Building Material Science
This work contributes to the use of alternative adhesives in the wood-based industry, where pine wood is commonly used. The investigation identifies the influence and the optimal content (8, 12 and 15wt%) of a bio-based polyurethane adhesive in the production of medium density particleboards (MDP). A compaction pressure of 4 MPa at 100oC for 10 minutes is considered in the manufacture of panels based on pine wood residues and bio-based resin. The bulk density, flexural modulus (MOE) and strength (MOR) properties under static three-point bending are obtained according to the Brazilian standard NBR 14810. The results are compared with NBR 14810 and other standards to verify its performance based on the minimum requirements. Bulk density is not significantly affected by the investigated adhesive levels. MOE and MOR reach average values equivalent to 12wt% and 15wt% of the adhesive, and both meet the minimum requirements established in international normative documents. The adhesive lev...