APP硅化泡桐木的制备及其燃烧特性研究

Preparation and Combustion Performance of Paulownia Wood Treated with APP/Silica Gel

将聚磷酸铵(APP)的高效阻燃特性与硅凝胶的吸附和催化转化特性有效结合,有可能实现木材在火灾条件下的不燃烧、不冒烟.通过真空-加压浸注和真空干燥法制备的APP硅化泡桐木载药率达到20.2%(质量分数),在锥形量热试验过程中没有点燃,760℃灼烧下不燃烧,总热释放量稍高于APP阻燃泡桐木,总烟释放量和CO产量远远低于未处理泡桐木和APP阻燃泡桐木.结果表明:APP硅化泡桐木中原位生成的APP-硅凝胶体系不仅对木材具有很好的阻燃作用,而且对火灾烟雾毒气具有极好的转化和抑制作用.

The combination of ammonium polyphosphate（APP）and silica gel is considered to be efficient flame retardant and smoke-suppresser for wooden materials due to their excellent adsorption and catalysis properties.APP/silica gel could be absorbed by 20.2%in mass in paulowna when using vacuum-pressure impregnation followed with vacuum drying.The wood so prepared were not able to be burned during CONE test,and did not show obvious combustion even burned at 760℃.The total heat release for treated paulownia wood was slightly higher than that treated by APP solely.However,the total smoke production and CO yield of treated paulownia wood were significantly reduced.The results indicate that,combination of APP and silica gel in paulownia wood not only contributed to excellent flame retardance,but also to inhibition and conversion of smoke in fire.