As an important metal additive, nano-Al powder has an important prospect in the field of energetic materials. However, nano-Al powder has not been widely used at present due to a large specific surface area and easily reacting with water, which reduces the content of active aluminum (only about 50%). In this word, the one of the -NCO acted as bridged functional groups have been connected with -OH on the surface of nano-Al powder, and the other one will be reacted the energetic molecule GAP by covalently grafting. After surface modificating, the surface moisture resistance and antioxidant ability of nano-Al powder have been improved, realizing the functional regulation of nano-Al powder. Through the change of surface energy, the compatibility between nano-Al powder and fluoropolymer was enhanced, and the practical application value of nano-Al in composites is improved. At the same time, based on the surface treatment, the core-shell nanocomposites of energetic-crystal HMX@Al was constructed. Nano-Al powder is evenly distributed on the crystal surface, increasing the contact area of two phases, and promoting the combustion properties and mechanical properties of nanocomposites.

Study on surface interfacial regulation and properties of nanocomposites based on grafting of nano-Al

2019 Fall National Meeting

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