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《Journal of Beijing Forestry University》 2006-02
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Improvement of wood properties by urea-formaldehyde resin and nano-SiO_2

SHI Jin-shu;LI Jian-zhang;ZHOU Wen-rui;ZHANG De-rong.College of Material Science and Technology,Beijing Forestry University,100083,P.R.China.  
In order to improve properties of triploid clones of Populus tomentosa,urea-formaldehyde(UF) resin was compounded with nano-SiO-2,coupling agents and flame retardants in different ways to prepare five kinds of modifiers.The poplar wood samples were impregnated with the modifiers and heated to prepare UF-SiO-2-wood composites.The antiswelling efficiency,oxygen index,and hardness of the composites were measured.Results showed that all of the modifiers reduced water absorption of poplar wood and enhanced its flame resistance and hardness.Nano-SiO-2 showed a marked effect in improving the hardness of wood.In addition,all of the modifiers except UF-C-SiO-2-polymer could improve the dimensional stability of poplar wood.The compound of UF resin and nano-SiO-2 could improve general properties of poplar wood.
【Fund】: 教育部优秀青年教师基金资助(2002-1962)
【CateGory Index】: S781.43
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