微流控结晶系统制备窄分布微米级硝胺炸药OA北大核心CSTPCD

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 D50 of RDX samples is 3.35 μm,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.