一种石墨烯阻燃涂层材料的制备方法

Preparation method of flame retardation graphene coating layer material

Abstract

一种石墨烯阻燃涂层材料的制备方法,涉及一种涂料制备方法,该方法采用Humeers水热法制备的氧化石墨烯用水合肼还原后用有机硅烷作为“桥梁”使石墨烯和环氧树脂通过化学键连接起来,通过分子设计合成石墨烯环氧树脂一体化涂层材料,其表面修饰的有机硅烷可以避免石墨烯片层的重新堆垛、聚集,使石墨烯环氧树脂一体化涂层材料的热稳定性和拉伸强度显著提升,一体化功能材料能够提高环氧树脂的氧指数和拉伸强度,降低热释放速率峰值、热释放总量,这是由于一体化涂层材料可以催化环氧树脂降解,形成密集、多孔炭层,覆盖在聚合物的表面,阻止气相和固相之间的热量与质量交换,延迟内部材料的进一步降解,达到涂层材料阻燃的目的。
The invention discloses a preparation method of a flame retardation graphene coating material, and relates to a preparation method of a coating. The method is characterized in that graphene oxide prepared through a Humeers hydrothermal technology is reduced by hydrazine hydrate, organosilane is used as a bridge to connect graphene with epoxy resin through chemical bonds, and a graphene and epoxy resin integrated coating material is synthesized through molecular design. The surface modifying organosilane avoids afresh stacking and aggregation of graphene flakes, so the heat stability and the tensile strength of the graphene and epoxy resin integrated coating material are substantially improved. The integrated functional material improves oxygen index of the tensile strength of the epoxy resin and reduces the heat release rate peak and the total heat release amount, because the integrated coating material can catalyze degradation of the epoxy resin to form a close and porous carbon layer covering the surface of polymer, prevent heat and mass exchange between a gas phase and a solid phase and delay further degradation of the internal material in order to reach the flame retardation purpose of the coating material.

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