Xiang Simeng, Chen Chiyuan, Liu Feng, Wang Linsheng, Feng Jiao, Lin Xiang, Yang Hongyu, Feng Xiaming, Wan Chaojun
College of Materials Science and Engineering, Chongqing University, 174 Shazhengjie, Shapingba, Chongqing 400044, China.
College of Materials Science and Engineering, Chongqing University, 174 Shazhengjie, Shapingba, Chongqing 400044, China.
J Colloid Interface Sci. 2024 Sep;669:775-786. doi: 10.1016/j.jcis.2024.05.060. Epub 2024 May 10.
Supramolecular flame retardants have attracted increasing attention recently due to their simple and eco-friendly preparation process. In this study, a novel flame retardant HEPFR was prepared using supramolecular self-assembly technology between piperazine and 1-hydroxy ethylidene-1,1-diphosphonic acid (HEDP). It was introduced into polyvinyl alcohol (PVA) matrix to form PVA/HEPFR composite film. Subsequently, the transparency, mechanical properties, thermal stability, and flame retardancy of PVA/HEPFR films were studied. Due to the hydrogen bonded cross-linked network structure between PVA and HEPFR, the mechanical properties of PVA/HEPFR films have been improved, while maintaining good transparency. With 10 wt% addition of HEPFR, PVA films can reach the VTM-0 level in UL-94 testing. And the limiting oxygen index can be increased from 18.5% of pure PVA to 26.5%. The peak heat release rate was reduced by 61.5%. The flame retardancy and thermal stability of PVA/HEPFR films have been greatly improved. This study provides a "one stone, three birds" strategy for preparing flame-retardant, transparent, and robust PVA film.
超分子阻燃剂因其简单且环保的制备过程，近年来受到越来越多的关注。在本研究中，利用哌嗪与1-羟基亚乙基-1,1-二膦酸（HEDP）之间的超分子自组装技术制备了一种新型阻燃剂HEPFR。将其引入聚乙烯醇（PVA）基体中形成PVA/HEPFR复合薄膜。随后，对PVA/HEPFR薄膜的透明度、力学性能、热稳定性和阻燃性进行了研究。由于PVA与HEPFR之间存在氢键交联网络结构，PVA/HEPFR薄膜的力学性能得到了改善，同时保持了良好的透明度。添加10 wt%的HEPFR时，PVA薄膜在UL-94测试中可达到VTM-0等级。极限氧指数可从纯PVA的18.5%提高到26.5%。热释放速率峰值降低了61.5%。PVA/HEPFR薄膜的阻燃性和热稳定性得到了极大提高。本研究为制备阻燃、透明且坚固的PVA薄膜提供了一种“一石三鸟”的策略。
