含氟高分子材料包覆铝核壳材料研究进展

Aluminum (Al) is the most popular metal additive in the field of composite solid propellants due to its high calorific value, high density and low oxygen consumption. In order to improve the performance of composite solid propellant, it is necessary to take measures to modify Al. In recent years, the fluorine-containing polymer coated Al has attracted wide attention due to its excellent comprehensive properties. This paper introduces the different kinds of metal aluminum core-shell materials coated with fluorine-containing polymer materials, the different coating methods, the properties of aluminum core-shell materials and the mechanism of action of fluorine-containing polymers and aluminum. The enhanced ignition and combustion performances of aluminum core-shell materials are due to the surface reaction between the fluorine-containing polymer and the alumina layer, resulting in a violent oxidation process. At the same time, the combustion agglomeration and combustion efficiency of aluminum core-shell material modified propellant are significantly improved. The problems existing in the research of fluorine-containing polymer coated aluminum materials are discussed, and the conclusion, prospect and possible research direction are put forward.