气凝胶
锥形量热计
聚氨酯
阻燃剂
材料科学
燃烧
化学工程
复合材料
保温
量热计(粒子物理)
可燃性
纳米颗粒
热重分析
热稳定性
热解
多孔性
烧焦
发泡剂
涂层
有机化学
化学
工程类
电气工程
探测器
作者
X. Long Zheng,Dong Quanxiao,Xi Wang,Peiyun Yu,Weimin Wang,Jinyong Zhang,Lin Ren
标识
DOI:10.3389/fmats.2021.673906
摘要
In this work, silica aerogel was modified by 9,10-dihydro-9-oxa-10-phosphaphenanthrene-1-oxide (DOPO). Then DOPO-immobilized silica aerogel nanoparticles were used as a flame retardant to prepare flame-retardant polyurethane foams. Microscale combustion calorimeter and cone calorimeter tests were employed to evaluate the flame retardancy of polyurethane foams. It was found that both the heat release rate and the total heat release of the composites were reduced with the incorporation of DOPO immobilized silica aerogel. It is speculated that the DOPO-immobilized silica aerogel nanoparticles can inhibit the degradation of polyurethane and catalyze the formation of carbonaceous carbon on the surface.
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