Abstract

There is a need for durable flame retardant treatments for cotton fabric in order to reduce the risk associated with fires. Many current industrial treatments make use of toxic halogenated organic flame retardants or utilize formaldehyde-evolving chemistry. A facile two-step process is described to coat cotton fabric based on a spontaneous crosslinking reaction between branched polyethyleneimine (PEI) and hexachlorocyclotriphosphazene (HCCP). A coating produced from solutions of 10 wt% PEI and 5 wt% HCCP endows the cotton fabric with a high limiting oxygen index (33.8%), self-extinguishing behavior in open flame testing, and an 85% reduction in peak heat release rate. This treated fabric also maintains self-extinguishing behavior after a simulated washing test. This unique combination of properties is the result of a strongly networked coating that intumesces during burning. The simplicity of this treatment and its formaldehyde-free chemistry make it a good option for replacing organo-halogen and formaldehyde-evolving treatments.

Graphic abstract

中文翻译：

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方便的两步式基于磷嗪的阻燃棉网络涂料

摘要

需要用于棉织物的持久阻燃处理，以减少与火灾相关的风险。当前许多工业处理使用有毒的卤代有机阻燃剂或利用甲醛释放化学物质。描述了一种基于支链聚乙烯亚胺（PEI）和六氯环三磷腈（HCCP）之间自发交联反应的两步涂布棉织物的方法。由10 wt％的PEI和5 wt％的HCCP溶液制成的涂层赋予棉织物很高的极限氧指数（33.8％），明火测试中的自熄性以及峰值放热率降低了85％。经过模拟的洗涤测试后，这种经过处理的织物还保持了自熄性。这种独特的性能组合是在燃烧过程中形成牢固网络的涂层的结果。这种处理方法的简单性及其无甲醛的化学性质使其成为替代有机卤素和甲醛释放处理的好选择。

图形摘要