火炸药学报2024，Vol.47Issue(6)：506-512,7.DOI:10.14077/j.issn.1007-7812.202403009
微流控制备包覆含能材料模拟物的核壳结构微球
Microfluidic Fabrication of Core-Shell Structured Microspheres for Encapsulation of Energetic Materials Simulant
摘要
Abstract
Based on a simple droplet microfluidic technology to produce a single emulsion,the core-shell microspheres with 4-nitrobenzaldehyde(p-NBA)as nuclear layer and polystyrene(PS)as shell layer were prepared,combined with phase separa-tion and crystallization solidification.The p-NBA was coated in one step as the analog of 3,4-dinitrotrifluorotoluene(DNTF).The microspheres with different structures and morphologies were obtained by adjusting the ratio of p-NBA,PS and the shaping agent ethyl cellulose(EC).The influence of above factors on the structures of core-shell microspheres was studied.Based on the double conditions of coating passivation effect and coating amount of high energy explosive DNTF,the optimal experimental conditions were obtained when using PS with large molecular weight(Mr=300000-350000):the mass ratio of EC and p-NBA is 1:10,and the mass fraction of PS is 8％.The results show that the addition of excipients can promote the crystalliza-tion of p-NBA and allow it to form spherical particles when the droplet phase is separated,then it can be completely coated.The larger the initial mass fraction of PS in the microdroplet,the thicker the shell layer and the higher the sphericity.However,the thicker the shell encapsulated with DNTF,the lower the detonation power.关键词
物理化学/微流控/核壳结构/微球/对硝基苯甲醛(p-NBA)/乙基纤维素(EC)/DNTF/赋形剂Key words
physical chemistry/microfluidic/core-shell structure/microspheres/4-nitrobenzaldehyde(p-NBA)/ethyl cellu-lose(EC)/DNTF/excipient分类
军事科技引用本文复制引用
刘静,吕英迪,刘建行,杨文博,陶胜洋..微流控制备包覆含能材料模拟物的核壳结构微球[J].火炸药学报,2024,47(6):506-512,7.基金项目
国家自然科学基金(No.22372025 （）
No.22272017) （）
中央高校基本科研业务费专项资金(No.DUT22LAB607) （No.DUT22LAB607）
