A metal hydride in-situ polymerization coating passivation method

Abstract

The invention discloses a metal hydride in situ polymerization and cladding passivation method, and is characterized by comprising the following steps: (1) dissolving 3,3-diazido methyloxetane and tetrahydrofuran (BAMO-THF) copolyether and a curing agent into anhydrous ethyl acetate, and preparing into a dilute solution; (2) putting metal hydride into the dilute solution and performing ultrasonic dispersion to form suspension liquid; (3) stirring and warming to the temperature of 40 to 60 DEG C, stirring for reaction, and recycling the solvent ethyl acetate by evaporation after the reaction is ended; (4) a product obtained after the solvent is removed completely by evaporation is dried and cured in a drying oven, so as to obtain the clad passivated metal hydride. According to the metal hydride in situ polymerization and cladding passivation method provided by the invention, the BAMO-THF copolyether is used for in situ polymerization and cladding of the metal hydride, and the treated and obtained metal hydride is insensitive to water in air. The own energy performance of the metal hydride is not affected while passivating the metal hydride.

Description

technical field [0001] The invention relates to a metal hydride in-situ polymerization coating passivation method, which specifically belongs to the technical field of energetic material safety protection. Background technique [0002] Metal hydrides, also known as salt-type hydrides, are binary compounds formed by the direct combination of active alkali metals and hydrogen. The general chemical formula is MH, where M is any one of alkali metal elements such as Li, Na, and Al. . Compared with other hydrogen storage methods, metal hydride has the advantages of high hydrogen storage density, stable pressure and simple hydrogen charging. The hydrogen storage density of metal hydride per unit volume can reach 1000 times that of gaseous hydrogen under the same temperature and pressure conditions. Because metal hydrides have the advantage of high hydrogen storage density, they are used as high-energy additives in rocket solid propellants to further increase the energy specific im...

AI Technical Summary

Problems solved by technology

The cladding layer used in this method is a non-energetic cladding layer, and the metal hydride is passivated by such a non-energetic cladding layer. Although the purpose of passivating the metal hydride is achieved, at the same time Also reduces the high-energy properties of metal hydrides when used as high-energy additives

[0005] In addition, there are few reports on metal hydride-related passivation treatment processes. The above-mentioned patented methods mainly focus on the passivation protection of metal hydrides, and do not consider the impact of the non-energetic coating layer on the energy characteristics of the metal hydride itself.