超临界流体反溶剂法制备超细HMX传爆药

摘要

In order to avoid defects of the ultra-fine explosive which was easy to agglomerate in the course of general coating,ultra-fine booster explosive based on sub-micron HMX was prepared by supercritical anti-solvent (SAS) technique. The influence of technical condition on the coating effect was studied. Test results show that the major factors affecting coating effect of sb-micron HMX are: initial solution concentration, system temperature, system pressure, average pressure increase velocity and average pressure decrease velocity. Under the conditions of volum of ethyl acetate 20 mL, system pressure 9. 5 Mpa , system temperature 50℃,average pressure increase velocity 3. 0 Mpa/min, average pressure decrease velocity 4. 0 Mpa/min,the grain diameter of ultra-fine booster explosive is 4- 8μm, Its characteristic drop of impact sensitivity is the highest and gap thickness of shock wave sensitivity is decreased by 35. 27% compared with that of JO-9C( I ) booster explosive.%为了克服超细炸药在常规包覆过程中易团聚的缺点,采用超临界流体反溶剂法( SAS)制备了以亚微米HMX为主体炸药的超细传爆药,探讨了工艺条件对亚微米HMX包覆效果的影响.结果表明,影响亚微米HMX包覆效果的主要因素有初始浓度、系统温度、系统压力、平均压力升高速率和平均压力下降速率.在加入20 mL的乙酸乙酯、系统压力9.5 MPa、系统温度50℃、平均压力升高速率3.0 MPa/min、平均压力下降速率4.0 MPa/min的条件下,超细传爆药的粒径为4～8μm,H50最高(即包覆效果最好),冲击波感度的隔板值比JO-9C(Ⅰ型)传爆药降低35.27％.