溶剂-反溶剂交替法制备大颗粒圆滑ε-CL-20

摘要

The large smooth ε-CL-20 particle was prepared by adding CL-20 filtrate to anti-solvent,precipitated a small amount of crystal of playing a similar role of seed crystal,and the secondary faster adding a lot of anti-solvents,made the crystal grow along the seed crystal.The effect of solvent volume and stirring rate on the morphology and size of ε-CL-20 was analyzed.The performances of ε-CL-20 after crystallization were characterized.Results show that compared with the raw material,the crystal particles of ε-CL-20 prepared by this method have the characteristics of smooth surface,no sharp edge angle,high density and narrow size distribution.The characteristic drop height H50 of ε-CL-20 increases from 25 cm to 40 cm,the friction sensitivity decreases from 96％ to 32％,the density increases from 2.0367 g · cm-3 to 2.0384 g · cm-3.%将六硝基六氮杂异伍兹烷(CL-20)的滤液加入到反溶剂中,析出少量的晶体,起到类似“晶种”的作用,二次快加大量反溶剂使析出的晶体沿“晶种生长”以制备大颗粒圆滑ε-CL-20.分析了反溶剂体积和搅拌速率对ε-CL-20形貌和粒度的影响.对结晶后的ε-CL-20性能进行了表征.结果表明,与原料相比,采用这种方法制备出的ε-CL-20的晶体颗粒,具有表面圆滑、无尖锐棱角、高致密、粒度分布窄的特点.ε-CL-20的特性落高H50从25 cm提高到40 cm,摩擦感度从96％降到32％,密度从2.0367 g· cm-3提高到2.0384 g· cm-3.