Zhu Taohua, Zhou Xuan, Guo Guozheng, Chai Zhihua, Gao Ming
Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China.
School of Electronic Science and Control Engineering, Institute of Disaster Prevention, Sanhe 065201, China.
Polymers (Basel). 2023 Mar 15;15(6):1455. doi: 10.3390/polym15061455.
Ionic liquid functionalized imogolite nanotubes (INTs-PF-ILs) were introduced into the epoxy resin (EP)/ammonium polyphosphate (APP) system to investigate the flame retardant performance and thermal properties using the limiting oxygen index (LOI) test, the UL-94 test, and the cone calorimeter test (CCT). The results suggested that a synergistic effect exists between INTs-PF-ILs and APP on the char formation and anti-dripping behavior of EP composites. For the EP/APP, an UL-94 V-1 rating was obtained for the loading of 4 wt% APP. However, the composites containing 3.7 wt% APP and 0.3 wt% INTs-PF-ILs could pass the UL-94 V-0 rating without dripping behavior. In addition, compared with the EP/APP composite, the fire performance index (FPI) value and fire spread index (FSI) value of EP/APP/INTs-PF-ILs composites were remarkably reduced by 11.4% and 21.1%, respectively. Moreover, the char formed by EP/APP composites was intumescent, but of poor quality. In contrast, the char for EP/APP/INTs-PF-ILs was strong and compact. Therefore, it can resist the erosion due to heat and gas formation and protect the inside of the matrix. This was the main reason for the good flame retardant property of EP/APP/INTs-PF-ILs composites.
将离子液体功能化埃洛石纳米管（INTs-PF-ILs）引入环氧树脂（EP）/聚磷酸铵（APP）体系，通过极限氧指数（LOI）测试、UL-94测试和锥形量热仪测试（CCT）来研究其阻燃性能和热性能。结果表明，INTs-PF-ILs与APP在EP复合材料的成炭和抗滴落行为方面存在协同效应。对于EP/APP体系，当APP负载量为4 wt%时，获得了UL-94 V-1等级。然而，含有3.7 wt% APP和0.3 wt% INTs-PF-ILs的复合材料能够通过UL-94 V-0等级且无滴落行为。此外，与EP/APP复合材料相比，EP/APP/INTs-PF-ILs复合材料的火灾性能指数（FPI）值和火灾蔓延指数（FSI）值分别显著降低了11.4%和21.1%。而且，EP/APP复合材料形成的炭是膨胀型的，但质量较差。相比之下，EP/APP/INTs-PF-ILs形成的炭坚固且致密。因此，它能够抵抗因热和气体形成而导致的侵蚀，并保护基体内部。这是EP/APP/INTs-PF-ILs复合材料具有良好阻燃性能的主要原因。
