液滴微流控技术制备亚微米级HNS基PBX复合微球  

Preparation of Submicron HNS-based PBX Composite Microspheres by Droplet Microfluidics

作　　者：刘意 朱瑞 时嘉辉 韩凯 武碧栋 安崇伟 王晶禹 LIU Yi;ZHU Rui;SHI Jia-hui;HAN Kai;WU Bi-dong;AN Chong-wei;WANG Jing-yu(School of Environmental and Safety Engineering,North University of China,Taiyuan 030051,China;Shanxi Province Ultrafine Powder Engineering Technology Research Center,Taiyuan 030051,China)

机构地区：[1]中北大学环境与安全工程学院,山西太原030051 [2]山西省超细粉体工程技术研究中心,山西太原030051

出　　处：《含能材料》2023年第2期121-129,共9页Chinese Journal of Energetic Materials

基　　金：国家自然科学基金资助(22005275);山西省研究生教育创新项目(2022Y657)。

摘　　要：为了获得形状规则、流散性好和粒径均一的球形化造型粉,采用液滴微流控技术,研究了不同黏结剂对2,2’,4,4’,6,6’-六硝基二苯基乙烯(HNS)复合微球性能的影响。分别选取氟橡胶(F2604)、硝化棉(NC)和聚叠氮缩水甘油醚(GAP)对亚微米HNS进行球形化造粒制备,成功制备出亚微米级HNS/F2604(95/5)、HNS/NC(95/5)和HNS/GAP(95/5)复合微球。通过扫描电镜、X射线衍射仪、比表面积、热分析仪、真密度测试仪和机械感度测试仪等对微球进行测试和表征。结果表明:3种黏结剂均能制得球形度高、单分散性好、粒径分布窄的HNS复合微球,平均圆形度分别为0.934,0.915,0.925,D50分别为45.39,58.68,45.43μm(跨度均小于0.55),热分解峰温分别为354.44,349.53,339.37℃。球形化过程使微球真密度分别增加到1.9408,1.9383,1.9204 g·cm^(-3),有效提高了HNS装药性能。微球堆积形成的锥角分别为27°,24.3°,24°,流散性好。与亚微米HNS相比,3种微球撞击感度分别提高了4.5,4,3.5 J,摩擦感度分别提高了52,36,4 N,安全性更好。In order to obtain spherical granulations with regular shape,good dispersibility and uniform particle size,the effects of different binders on 2,2’,4,4’,6,6’-hexanitrodiphenylethylene (HNS) composite microspheres were studied by using droplet microfluidic technology.Fluoroelastomer (F2604),nitrocellulose (NC) and glycidyl azide polymer (GAP) were selected to prepare spherical granulation of submicron HNS,and submicron-level HNS/F2604(95/5),HNS/NC (95/5) and HNS/GAP (95/5) composite microspheres were successfully prepared.Resultant microspheres were characterized by scanning electron microscope,X-ray diffractometer,specific surface area,thermal analyzer,true density tester and mechanical sensitivity tester.Results indicated that such methods could obtain the HNS composite microspheres with high sphericity,monodisperse,narrow size distribution,good roundness and improved safety performances.The average circularities were 0.934,0.915 and 0.925 with D50of 45.39,58.68μm and 45.43μm (the span was less than 0.55),respectively.Thermal decomposition peak temperatures were 354.44,349.53℃and 339.37℃for HNS/F2604,HNS/NC and HNS/GAP,respectively.The spheroidization process increases the true density of the microspheres to 1.9408,1.9383 g·cm^(-3)and 1.9204 g·cm^(-3),respectively,which can effectively improve the HNS charge performance.The cone angles of 27.0°,24.3°,and 24.0°indicated that microspheres have good dispersion performances.Compared with submicron HNS,the impact sensitivity of the three microspheres was increased by 5.5,4,3.5 J,and the friction sensitivity was increased by 52,36 N and 4 N,respectively,indicating a better safety performance.

关 键 词：液滴微流控技术 亚微米 HNS 复合微球 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术]