Spray crystallization to prepare HMX@NTO composites
In order to reduce the mechanical sensitivity of HMX and maintain its explosive performance,the surface of HMX was coated with the insensitive explosive NTO by spray crystallization process.The process conditions were explored by orthogonal experiments.The results show that the surface morphology of the coated HMX was mainly affected by the solvent system and the spray crystallization process.When the optimal solvent system was NMP-dichloromethane,and the optimal spray crystallization process parameters were solvent concentration 0.4 g/mL,solvent ratio 10:200,rotation speed 600 r/min and solvent temperature 25 ℃,the yield is about 5 g and the surface morphology of HMX was the best.Compared with HMX raw materials,the explosive performance of NTO-coated HMX were basically unchanged,but the impact sensitivity characteristics were enhanced 16.3 cm,its friction sensitivity was reduced by 60％and the detonation velocity was reduced by 2.8％.HMX safety performance can be greatly improved.
万方数据
维普
