一种双核爱斯特诱导的超大分子防火凝涂层,用于保护聚合物
Jin Xu1, Xing Su1, Dichang Xue1
1School of Materials Science and Engineering, Beijing Institute of Technology, No. 5 South Zhongguancun Street, Haidian District, Beijing 100081, China.
天然提取物植物酸 (PA) 和酸 (TA) 形成高分子凝,用于聚合物防火. 这种先进的水凝涂层在暴露于火灾期间显著提高了阻燃性和材料完整性.
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:
- 聚合物材料面临着重大火灾风险,目前的研究优先考虑阻燃性而不是全面的防火保护.
- 现有的阻燃剂策略往往会导致聚合物在接触火灾时的结构和性能退化.
研究的目的:
- 开发一种新型的超分子凝涂层,用于增强聚合物材料的防火保护.
- 为了研究天然提取物制成的水凝的阻燃性能和保护机制.
主要方法:
- 通过通过双核性化合成酸 (PA) 和酸 (TA) 的化合物,合成了一种超分子凝 (T-P5-PAA).
- 将水凝作为薄 (600微米) 的保护涂层涂在各种聚合物材料上.
- 使用点火时间 (TTI) 和限制氧气指数 (LOI) 测试评估火焰阻燃性,并评估火焰暴露后的结构完整性.
主要成果:
- T-P5-PAA水凝涂层表现出异常的阻燃性,TTI增加了超过2800% (至>1280秒),并达到LOI值>60vol%.
- 保护的聚合物材料即使在与火焰直接接触后也保持了它们的原始结构和机械性能,与传统方法不同.
- 水凝的纳米孔隙结构有效地抑制了热量和气体的转移,减缓了热分解.
结论:
- 开发的超分子水凝为聚合物提供了高效的防火策略,超过了传统的阻燃剂.
- 水凝的独特特性,包括自我愈合和机械适应性,提供持久的保护.
- 这项工作为设计高性能,环保的超分子软材料提供了新的见解,用于先进的消防安全应用.
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