期刊论文

Wu, Y.-Q.(wuyq0506@126.com)

中文

功能材料

1001-9731

2014

45

14

14113-14117

10.3969/j.issn.1001-9731.2014.14.022

国家林业公益性行业科研重大专项资助项目（201204704） “十二五”国家科技支撑计划资助项目（2012BAD24B03） 国家自然科学基金资助项目（31070496） 国家林业科学技术推广资助项目（[2011]52） 湖南省研究生科研创新资助项目（CX2012A013）

本校为第一且通讯机构

采用溶胶-凝胶法制备聚磷酸铵(APP)-Si O 2凝胶/杨木阻燃复合材料,表征其微观形貌、结构组成、物理力学性能,并研究其阻燃抑烟作用机理。结果表明,APP-SiO_2凝胶主要分布在木材导管、木射线及细胞间隙中,凝胶体系与木材纤维素形成氢键紧密结合。复合材料在700℃的失重率仅为素材的71.9%,残炭量由5.4%上升到31.9%,热稳定性改善。复合材料的热释放速率、总热释放量、烟生成速率、总烟释放量较未处理木材均明显降低,当 APP 浓度为18%时,复合材料的总烟释放量仅为素材的4.9%,表现出高效的阻燃抑烟特性。尽管复合材料的静曲强度略微降低,但其弹性模量明显上升,增幅高达35.8%。

The APP-SiO2 aerogel/poplar wood composite with well flame retardant was prepared by sol-gel method. These properties for the resultant composites, including microstructure, chemical composition, and mechanical strength, were characterized to explore the mechanism of flame retardant and smoke suppression. Results showed that APP-SiO2 aerogels, bonded with wood cellulose by hydrogens, majorly distributed in vessels, pits and the spaces between wood cells of poplar substrate. The weight loss ratio of composite at 700 °C was only as 71.9% as popl...