Preparation of hexanitrostilbene/aluminum microspheres with interconnected multi-cavity structure for enhanced safety and combustion performance  

作　　者：Yi Liu Yunyan Guo Fan Wang Zhihua Xue Chongwei An Zhongliang Ma Bidong Wu 

机构地区：[1]School of Environment and Safety Engineering,North University of China,Taiyuan,030051,China

出　　处：《Particuology》2025年第3期21-30,共10页颗粒学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(grant No.22005275).

摘　　要：Achieving performance optimization of aluminized explosives through structural regulation is of great significance for enhancing their practical application value.In this study,hexanitrostilbene/aluminum(HNS/Al)microspheres with interconnected multi-cavity structures were prepared using microjet droplet technology,and the effect of solvent ratio on microsphere morphology and multi-cavity formation was investigated.Furthermore,the impact of the multi-cavity structure on microsphere dispersibility,specific surface area,thermal properties,mechanical sensitivity,and combustion performance was examined.The results indicate that,compared to raw HNS,the multi-cavity HNS/Al microspheres exhibit improved dispersibility while retaining the crystal structure,chemical composition,and thermal stability of the raw material.In comparison to solid HNS/Al microspheres,the multi-cavity HNS/Al microspheres demonstrate a higher specific surface area(26.432 vs.30.987 m^(2) g^(-1))and improved safety performance(3.5 vs.15 J).Ignition test results reveal that the addition of aluminum powder significantly reduces the ignition delay of HNS(275 vs.5.0 ms)and inhibits carbon cluster formation during combustion,thereby enhancing the burning efficiency of HNS.Notably,microspheres with a multi-cavity structure exhibit superior combustion efficiency.This study provides a method for preparing multi-structured aluminized explosives.

关 键 词：Energetic microsphere Aluminized explosive Multi-cavity structure HNS Combustion 

分 类 号：TQ560.1[化学工程—炸药化工]