A multilayered coating of Phenoxycyclophosphazene-functionalized graphene oxide (FGO) and chitosan-functionalized carbon nanotubes (CNTs) for wood pulp paper (WPP) is designed by a facile layer-by-layer assembly method. The obtained FGO/CNTs coated WPP shows enhanced mechanical properties as well as improved flame retardancy without deteriorating the intrinsic flexibility of WPP. Meanwhile, the electrical resistance of the hybrid FGO/CNTs structure is highly sensitive to flame and temperature, which makes the coated WPP an ideal fire sensor. The as-prepared flexible FGO/CNTs coated WPP sensor exhibits excellent shape retentivity and flame retardancy when burnt by ethanol flame or heat treated, and can detect fire by sensing the elevated temperature in several seconds before igniting the combustible materials. Besides, the response time is adjustable by varying the content of CNTs in constructing the hybrid conductive network. These results suggest that the novel design of multilayer coating of FGO/CNTs on WPP has great potential in the applications of advanced fire alarm systems.

通过简便的逐层组装方法设计了用于木浆纸（WPP）的苯氧基环磷腈官能化的氧化石墨烯（FGO）和壳聚糖官能化的碳纳米管（CNT）的多层涂层。所获得的涂覆有FGO / CNTs的WPP显示出增强的机械性能以及改进的阻燃性，而不会降低WPP的固有挠性。同时，混合FGO / CNTs结构的电阻对火焰和温度高度敏感，这使得涂覆的WPP成为理想的火灾传感器。制备的柔性FGO / CNTs涂层WPP传感器在被乙醇火焰或热处理后燃烧时，具有出色的形状保持性和阻燃性，并且可以在点燃可燃材料之前几秒钟内检测到高温，从而探测到火灾。除了，在构建混合导电网络时，可通过改变CNT的含量来调节响应时间。这些结果表明，WPP上FGO / CNTs多层涂层的新颖设计在先进的火灾报警系统的应用中具有巨大的潜力。