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The influence of silane coupling agent and poplar particles on the wettability, surface roughness, and hardness of UF-bonded wheat straw(Triticum aestivum L.)/poplar wood particleboard

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Journal of Forestry Research 2014年第3期25卷 667-670页

作者： Seyedeh Masoumeh Hafezi Kazem Doosthoseini Department of Wood and Paper Sciences and Technology Faculty of Natural Resources University of Tehran

We used silane coupling agents to improve the bonding ability between wheat straw particles and UF resin, and investigated surface properties （wettability and surface roughness） and hardness of parti-cleboard made from UF-bonded wheat straw （Triticum aestivum L.） combined with poplar wood as affected by silane coupling agent content and straw/poplar wood particle ratios. We manufactured one-layered particleboard panels at four different ratios of straw to poplar wood par-ticles （0%, 15%, 30% and 45% wheat straw） and silane coupling agent content at three levels of 0, 5% and 10%. Roughness measurements, average roughness （Ra）, mean peak-to-valley height （Rz）, and root mean square roughness （Rq） were measured on unsanded samples by using a fine stylus tracing technique. We obtained contact angle measurements by using a goniometer connected to a digital camera and computer sys-tem. Boards containing greater amounts of poplar particles had superior hardness compared to control samples and had lower wettability. Panels made with higher amounts of silane had lower Rq values.

关键词： wheat straw particleboard poplar wood surface properties,wettability silane coupling agent hardness

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维普期刊数据库

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Use of amino silane coupling agent to improve physical and mechanical properties of UF-bonded wheat straw(Triticum aestivum L.) poplar wood particleboard

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Journal of Forestry Research 2016年第2期27卷 427-431页

作者： Seyedeh Masoumeh Hafezi Aliakbar Enayati Kazem Doost Hosseini Asghar Tarmian Sayed Ahmad Mirshokraii Department of Wood and Paper Sciecne & Technology Faculty of Natural Resources University of Tehran Chemistry Department Payame Nour University

We evaluated the potential use of amino silane coupling agent （SiNH） to improve physical and mechanical properties of UF-bonded wheat straw （Triticurn aestivum L.） poplar wood particleboard. We examined the effects of varied content of silane coupling agent content and ratios of straw to poplar wood particles on particleboard prop- erties. The ratios of straw to poplar wood particles were 100：0, 85：15, 70：30 and 55：45. Silane coupling agent content was tested at three levels, 0, 5 and 10 %. The experimental panels were tested for their mechanical strength, including modulus of elasticity （MOE）, modulus of rupture （MOR）, intemal bonding （IB） and physical properties according to procedures specified in DIN 68763 （Chipboard for special purposes in building construction： concepts, requirements, testing, 1982-03, 1982）. All board properties were improved by the addition of silane cou- pling agent. The use of poplar wood particles had a positive effect on the mechanical properties of wheat straw parti- cleboard but had a negative effect on physical properties （thickness swelling and water absorption）.

关键词： wheat straw particleboard Poplar wood UFresin Silane coupling age

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维普期刊数据库

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The effect of urea pretreatment on the formaldehyde emission and properties of straw particleboard

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Journal of Forestry Research 2012年第3期23卷 497-502页

作者： Hojat Hematabadi Rabi Behrooz Department of Wood and Paper Science and Technology College of Natural ResourcesTarbiat Modares UniversityP.O.Box 46414-356NoorIran

For manufacturing low-formaldehyde emission particleboard from wheat straw and urea-formaldehyde （UF） resins using urea treatment for indoor environments, we investigated the influence of urea treatment on the formaldehyde emission, physical and mechanical properties of the manufactured particleboard. wheat straws were treated at three levels of urea concentration （5%, 10%, 15%） and 95℃ as holding temperature. wheat straw particleboards were manufactured using hot press at 180℃ and 3 MPa with two types of UF adhesive （UF-45, UF-91）. Then the formaldehyde emission values, physical properties and mechanical properties were considered. The results show that the for- maldehyde emission value was decreased by increasing urea concentration. Furthermore, the results indicate that the specimens under urea treatment have better mechanical and physical properties compared with control specimens. Also specimens under urea treatment at 10% concentration and UF-91 type adhesive have the most optimum physical and mechanical strength.

关键词： formaldehyde emission physical and mechanical properties wheat straw particleboard Urea formaldehyde resin

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