添加剂的优化,以最大限度地提高可扩展的基于石墨的内燃阻燃聚氨复合材料的性能
Imrana I Kabir1, Juan Carlos Baena1, Wei Wang1
1School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW 2052, Australia.
Molecules (Basel, Switzerland)
|July 14, 2023
概括
这项研究使用可扩展石墨 (EG) 和其他添加剂增强阻燃聚氨 (PU) 复合材料. 40%重量的EG配方显著减少了热量,烟雾和二氧化碳,为建筑材料提供了一个有前途的解决方案.
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:
- 聚氨 (PU) 聚合物在安全应用中需要增强阻燃性.
- 传统的浸泡式阻燃剂 (IFR) 系统对于提高聚合物防火性能至关重要.
- 研究低成本添加剂的协同效应是开发有效阻燃材料的关键.
研究的目的:
- 评估聚氨 (PU) 复合材料中可扩展石墨 (EG),聚酸盐 (APP),玻璃纤维 (FG) 和水晶石 (VMT) 的协同阻燃效应.
- 为了确定最佳的组成,以提高阻燃性和烟雾抑制.
- 评估这些添加剂对PU复合材料机械性能的影响.
主要方法:
- 合成的PU复合材料具有不同重量百分比 (wt.%) 的EG,APP,FG和VMT.
- 利用扫描电子显微镜 (SEM),热重力测量分析 (TGA),拉伸强度测试,以及用于分析的圆热量计.
- 研究了燃烧过程中保护层的形成和紧性.
主要成果:
- 与较低度相比,含有40%重量EG的PU复合材料显示出更高的阻燃性能.
- 与对照PU相比,40重%的EG配方减少了88%的峰值热释放率,93%的总烟雾释放率和92%的CO2产量.
- 玻璃纤维 (FG) 的添加改善了与其他阻燃添加剂观察到的抗拉强度的下降.
结论:
- EG,APP,FG和VMT之间的协同作用显著提高了PU复合材料中的阻燃性和烟雾抑制.
- 保护层的紧性对于观察到的阻燃性能至关重要.
- 这些开发的PU复合材料为建筑应用中的阻燃和阻烟材料提供了可行的策略.
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