摘要
为了在安全临界尺度下实现炸药结晶的调控与批量生产,基于微流控技术组建了ZS-1型微流控结晶系统,并选用二甲亚砜(DMSO)和去离子水分别作为溶剂与反溶剂,通过改变两相流量比、炸药相浓度与总流量等结晶过程参数,在微尺度下进行了环三亚甲基三硝胺(RDX)的粒度控制研究和环四亚甲基四硝胺(HMX)的粒度与晶型控制研究,探索了结晶参数的高通量筛选。在ZS-1型微流控结晶系统上进行了微米级RDX的批量制备实验。结果表明,经系统重结晶细化的RDX样品的D_(50)为3.35μm,跨度(粒径分布)为0.956,纯度为99.80%,平均粒径较原料RDX缩小了22.2倍,且产量可达每小时百克量级,验证了微尺度下窄分布微米级炸药批量制备的可行性。
To achieve the crystallization regulation and batch production of explosives at the safety⁃critical scale,the ZS⁃1 micro⁃fluidic crystallization system was established based on the microfluidic technology.The experiments were carried out with DMSO as the solvent and deionized water as the anti⁃solvent.By changing the crystallization process parameters such as the two⁃phase flow rate ratio,explosive concentration and total flow rate,the particle size control of RDX and the polymorphic transformation of HMX at the microscale was studied,and high⁃throughput screening of crystallization parameters was explored.Batch preparation experiment of micron RDX was carried out on the ZS⁃1 microfluidic system.The results show that the average paritcle size of RDX is deduced by 22.2 times after recrystallization.Specifically,the D_(50)of RDX samples is 3.35μm,the SPAN number is 0.956 and the purity is 99.80%,and the hourly output of single system reaches 207.7 g.The ZS⁃1 microfluidic crystal⁃lization system verifies the feasibility of batch preparation of narrow size⁃distributed micron explosives at the microscale.
作者
夏皓轩
石锦宇
刘津搏
周星屹
费翼鹏
宁爵勇
刘立
朱朋
沈瑞琪
XIA Hao-xuan;SHI Jin-yu;LIU Jin-bo;ZHOU Xing-yi;FEI Yi-peng;Ning-Jue-yong;LIU Li;ZHU Peng;SHEN Rui-qi(School of Chemistry and Chemical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;Key Laboratory of Nano‑Micro Energetic Devices,Ministry of Industry and Information Technology,Nanjing 210094,China;Institute of Chemical Materials,CAEP,Mianyang 621999,China)
出处
《含能材料》
EI
CAS
CSCD
北大核心
2024年第3期256-269,共14页
Chinese Journal of Energetic Materials
基金
国家自然科学基金资助(22075145)。
关键词
微流控
硝胺类炸药
重结晶调控
柔性制造
microfluidic
nitramine explosives
recrystallization
flexible manufacturing
