通过化学接枝法获得了氨基化埃洛石纳米管(N-HNTs),与聚磷酸铵(APP)复配制备了N-HNTs-APP/EP固体环氧树脂复合材料,并对复合材料的固化行为、力学性能、热降解行为、阻燃性能、残炭形貌进行研究。结果表明,添加5% N-HNTs-APP不仅促进了EP的固化反应,而且复合材料的力学性能得到全面提升,其中冲击强度和断裂伸长率较纯EP分别提高了63.9%和28.2%。同时,5% N-HNTs-APP/EP复合材料的极限氧指数(LOI)达31.7%,通过UL-94 V0级别,其热释放速率峰值(pHRR)、总热释放速率(THR)、烟释放速率峰值(SPR)和生烟总量(TSP)较纯EP均大幅下降。
Aminated halloysite nanotubes (N-HNTs) were fabricated by chemical grafting,and then,by compounding with ammonium polyphosphate (APP),solid epoxy resin composites (N-HNTs-APP/EP) were further prepared.The curing behavior,mechanical properties,thermal degradation behavior,flame retardancy and morphology of char residue of the EP composites were thoroughly investigated.The results showed that the addition of 5% N-HNTs-APP not only promoted the curing reaction of EP,but also comprehensively improved the mechanical properties of the composites,among which the impact strength and the elongation at break increased by 63.9% and 28.2% compared with pure EP,respectively.Additionally,5% N-HNTs-APP/EP composite achieved UL-94 V0 level with the LOI value of 31.7%.Moreover,compared with pure EP,the peak heat release rate (pHRR),total heat release rate (THR),peak smoke release rate (SPR) and total smoke production (TSP) of 5% N-HNTs-APP/EP composite were significantly reduced.
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基金资助
国家自然基金青年项目(51903222);浙江农林大学人才引进启动基金资助项目(2017FR017);2021年浙江省大学生科技创新活动计划(2021R412012);浙江农林大学大学生科研训练项目(2020KX0080,2020KX0077)
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