超细HMX的微流体结晶调控及高通量制备OA北大核心CSTPCD

To make accurate control of crystal microstructure and improve the crystal quality and quality consistence of ultra-fine energetic materials,a microfluidic crystallization platform was established and the flow characteristics of fluids under mi-croscale conditions were studied by taken HMX as the research object.The effect of reaction parameters such as concentration and flow on the morphology of ultrafine HMX crystals was studied and the large-scale preparation of ultrafine HMX was ex-plored.The results show that the swirling chip has better mass transfer effect and thinner boundary layer effect than the heart shaped chip,make it more suitable for the preparation of brittle crystals.When DMSO is used as solvent,HMX crystals have good morphology with uniform size and high sphericity.When the flow ratios R are 1,5,and 10,the average particle sizes of HMX are 8.86,4.14,and0.86µm,respectively.With the increasing of R,the particle size of HMX gradually decreases and the particle size distribution narrows.By changing the process parameters,microfluidic crystallization can realize the con-trollable preparation of ultrafine HMX with different morphologies and particle sizes.The high-throughput preparation of ultra-fine HMX is realized by multi-layer combination and parallel shunt.This method not only has the merits of small mixing efficien-cy difference,large product processing capacity and low overall energy consumption of the equipment,but also provides a way for the high-throughput preparation of micro-nano energetic materials with narrow particle size range.