MXene@PANI纳米杂化物对环氧树脂火灾安全性的影响  

Influences of MXene@PANI Nanohybrids on Fire Safety Properties of Epoxy Resin

作　　者：张佳乐 魏琦 谢哲涵 周克清 ZHANG Jiale;WEI Qi;XIE Zhehan;ZHOU Keqing(Faculty of Engineering,China University of Geosciences(Wuhan),Wuhan 430074,China)

机构地区：[1]中国地质大学(武汉)工程学院,湖北武汉430074

出　　处：《安全与环境工程》2023年第6期9-16,共8页Safety and Environmental Engineering

基　　金：中国地质大学(武汉)大学生自主创新资助计划项目(CUGDCJJ202203、CUGDCJJ202230);2022年国家级大学生创新创业训练计划项目(S202210491137);国家自然科学基金项目(22005277、52074247)。

摘　　要：为改善聚合物的火灾安全性,通过氢键相互作用制备了MXene@PANI纳米杂化物,并将其添加到环氧树脂(EP)中,对纳米杂化物在EP中的分散性及其对EP阻燃性能和减毒性能的影响进行了研究,分析了EP复合材料的阻燃机理。结果表明:纳米杂化物能在EP基体中均匀分散;纳米杂化物的加入有效延缓了EP复合材料的热降解,提高了残炭量;EP复合材料的热释放速率峰值(pHRR)、总热释放量(THR)相对纯EP分别降低了22%和10.1%,有毒气体的释放速率也明显降低,表现出更好的火灾安全性;火灾安全性的提升主要归因于二维纳米材料的迷宫效应、MXene和PANI的催化成炭作用以及PANI受热时生成不可燃气体。In order to improve the fire safety of polymers,MXene@PANI nanohybrids were prepared by hydrogen-bond interactions and added to epoxy resin(EP),the dispersion of nanohybrids in EP and their effects on the flame retardancy and toxicity reduction properties of EP were investigated,and the flame retardancy mechanism of EP composites was analyzed.The results show that the nanohybrids are uniformly dispersed in EP matrix,which effectively delays the thermal degradation rate of EP composites and increases the char residues.Meanwhile,the peak heat release rate(PHRR)and the total heat release(THR)of EP/MXene@PANI composites are reduced by 22%and 10.1%,respectively,compared with those of pure EP,and the release rate of toxic gases is also significantly reduced,showing better fire safety.The improvement of fire safety is mainly attributed to the labyrinth effect of two-dimensional nanomaterials,catalytic char-forming effect of MXene and PANI,and the formation of non-combustible gas when PANI is heated.

关 键 词：环氧树脂(EP) 聚苯胺(PANI) MXene 纳米杂化物 火灾安全性 

分 类 号：X932[环境科学与工程—安全科学]