Mechanical properties of wheat straw particleboard using Composite adhesives
The purpose of the study was to use a cheap wheat straw to manufacture particleboard.Wheat straws offer great promise and new challenges as replacement for wood in processed wood products.The particleboard was produced using composite adhesive which the urea-formaldehyde (UF) adhesives modified by emulsifiable polymeric methylene diphenyl diisocyanate (EPU).The properties of the particleboard was evaluated by measuring internal bonding strength(IB),thickness swelling,modulus of rupture(MOR),modulus of elasticity (MOE) and formaldehyde emission.The optimal condition was chosen at density of 0.75g/cm3,UF/EPU ratio of 70/30,adhesive amounts of 10％ based on the dry amounts of wheat straw.The test results showed that maximum dry internal bonding strength,wetting internal bonding strength,modulus of rupture,modulus of elasticity was 0.45MPa,0.072MPa,31.50MPa and 4564MPa,respectively.The thickness swelling (TS2h) and thickness swelling (TS24h) was 3.51％ and 11.1％,respectively.The free formaldehyde of wheat straw particleboard reached EO-type national standards.
wheat straw Mechanical properties Particleboard Composite adhesive
Yanhua Zhang Jiyou Gu Yingfeng Zuo Mingwei Di Haiyan Tan Libin Zhu
College of Material Science and Engineering,Northeast Forestry University,Harbin,China,150040,P.R.China
国际会议
哈尔滨
英文
2096-2099
2010-07-24（万方平台首次上网日期，不代表论文的发表时间）