来自生物质资源的分层双氧化物对聚乳酸的阻燃修饰
Ruyi Hou1,2, Lixu Liang1,2, Yao Jin1
1School of Chemistry and Materials Science, Hubei Engineering University, Xiaogan 432000, China.
ACS omega
|August 4, 2025
概括
经过植物酸修饰的分层双氧化物 (PA-LDH) 增强了聚乳酸的火焰阻燃性. 通过创建屏障和碳化效应,提高机械性能,PA-LDH提高了分散和消防安全.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 消防安全工程 消防安全工程
背景情况:
- 层状双氧化物 (LDH) 是有前途的无素阻燃剂.
- 低密度聚合物 (LDH) 的分散性和聚合物兼容性不佳,限制了它们的效率.
- 聚乳酸 (PLA) 对于更广泛的应用,需要提高阻燃性.
研究的目的:
- 开发一种新型的植物酸修饰的LDH (PA-LDH) 阻燃剂,用于PLA.
- 为了研究PA-LDH在PLA复合材料中的微观结构,特性和阻燃性能.
- 评估PA-LDH对PLA火灾行为和机械性能的影响.
主要方法:
- 用植物酸修饰的LDH (PA-LDH) 的合成和表征.
- 制备含有PA-LDH和酸 (TA) 的PLA复合材料.
- 使用限制氧气指数 (LOI),UL-94垂直燃烧试验和圆热量计来评估阻燃性.
- 分析微观结构,结晶性和机械性能.
主要成果:
- 与未经修改的LDH相比,PA-LDH在PLA中显示出更高的分散.
- 含有25重%PA-LDH和8.33重%TA的PLA复合材料获得了26.9%的LOI和UL-94 V-0评级.
- 与纯PLA相比,圆热量计显示,峰值热释放率 (PHRR) 显著降低52.1%,总热释放率 (THR) 降低57.9%,总烟雾产量 (TSP) 降低62.2%.
- 由于增强的结合,PA-LDH的结合增加了PLA的结晶性和机械性能.
结论:
- 植物酸修饰有效地改善了LDH分散和PLA的阻燃性能.
- 通过增强屏障和催化碳化效应,PA-LDH充当有效的阻燃剂.
- 开发的PA-LDH混合系统为改善PLA的消防安全和材料性能提供了可行的解决方案.
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