超临界CO_2反溶剂法制备CL-20超细微粒

Preparation of Ultrafine CL-20 by Supercritical CO_2 Anti-solvent Method

利用超临界二氧化碳反溶剂法(SAS),以乙酸乙酯为溶剂,聚乙烯醇-200(PEG-200)为表面活性剂,在50℃、12 MPa,CL-20溶液质量百分浓度为5%的条件下,制备了CL-20超细微粒。利用扫描电镜(SEM)、傅里叶变换红外光谱(FTIR)、热重分析(TGA)、差示扫描量热分析(DSC)对其进行了测试,研究了其撞击感度,对SAS过程中CL-20晶型的形成机理进行了分析。研究表明,所得CL-20超细微粒表面圆润,无明显棱角,粒径分布均匀,平均粒径为1.33μm。

The Supercritical CO2 ant PEG-200 as surfactant. At 50 ℃, I characterized by SEM, FIRT, TGA, with good particle size distribution. -solvent method （SAS） was used to prepare ultrafine CL-20 using Ethyl acetate as solvent and 2 MPa and mass concentration of 5%, the ultrafine CL-20 was obtained. The sample was DSC. Result shows the surface of particles is smooth and the average particle size is I 133 μm And the process of CL-20 crystal formation in SAS was analyzed.