摘要
为了提升RDX基PBX造型粉的包覆效果和质量一致性,采用膜乳化技术制备出乳滴直径均一的水包油型粘结剂(NC/F_(2602))乳液,将超细RDX颗粒悬浮于乳液体系中,通过驱除乳滴中的溶剂,实现NC/F_(2602)/RDX含能微球的悬浮组装成型。对样品形貌、粒度分布、晶型和热分解性能进行表征,并对不同样品的撞击感度进行测试。结果表明:NC/F_(2602)/RDX复合物呈球状,包覆致密且粒度分布较窄,晶型未发生改变。相比超细RDX,NC/F_(2602)/RDX复合微球的表观活化能由162.25kJ·mol^(-1)升至165.98kJ·mol^(-1),热爆炸临界温度仅降低了0.01℃;复合微球的撞击安全性显著改善,特性落高H50由47.3cm升至62.5cm。
In order to improve the coating effect and quality consistency of RDX-based PBX molding powder,an oil-in-water emulsion with uniform droplet diameter dissolved with binder(NC/F_(2602))was prepared by membrane emulsification technology,and then ultrafine RDX particles were suspended in the emulsion system.By expelling the solvent in the droplets,the suspension assembly molding of NC/F_(2602)/RDX energetic microspheres was realized.The morphology,particle size distribution,crystal form and thermal decomposition properties of RDX samples were characterized,furthermore,the impact sensitivity of different samples was also tested.The results show that the NC/F_(2602)/RDX composite is spherical,with compact coating and narrow particle size distribution,and the crystal form remains unchanged.Compared with ultrafine RDX,the apparent activation energy of the thermal decomposition of NC/F_(2602)/RDX composite microspheres is increased from 162.25kJ·mol^(-1)to 165.98kJ·mol^(-1),the critical temperature of thermal explosion is decreased by only 0.01℃.The safety performance of composite microspheres under impact is significantly improved,and the character drop height is increased from 47.3cm to 62.5cm.
作者
朱玉宇
霍宏彪
王杰超
刘淳睿
都吉航
安崇伟
ZHU Yu-yu;HUO Hong-biao;WANG Jie-chao;LIU Chun-rui;DU Ji-hang;AN Chong-wei(School of Environmental and Safety Engineering,North University of China,Taiyuan,030051)
出处
《火工品》
CAS
CSCD
北大核心
2023年第1期58-62,共5页
Initiators & Pyrotechnics
基金
山西省高等学校大学生创新创业训练计划项目基金(No.2020328)
山西省高等学校创新人才支持计划项目(No.2019031)。
关键词
黑索今
膜乳化
复合微球
悬浮组装
撞击感度
RDX
Membrane emulsification
Composite microspheres
Suspension assembly
Impact sensitivity
