球形化CL-20制备及性能表征

Preparation and Characterization of Spheroidized CL-20

为降低工业六硝基六氮杂异伍兹烷(CL-20)的机械感度,增强其工艺适应性,提高使用安全性,通过超声分散处理工艺、湿法粉碎工艺以及高剪切分散乳化工艺分别制备了球形化CL-20,采用扫描电子显微镜(scanning electron microscope,SEM)、X射线衍射(diffraction of X-rays,XRD)、激光粒度仪、差示扫描量热仪(differential scanning calorimeter,DSC)对处理前后CL-20的形貌、晶型、粒度、热分解等性能进行了测试,采用GJB 772A—1997方法测定了机械感度。结果表明:采用三种工艺方式制备的CL-20粒度减小,表面圆滑;处理前后晶型不变,均为ε型;处理后的CL-20机械感度降低;采用高剪切分散乳化工艺制备的球形化CL-20分解温度较原材料降低6.59℃,而其他两种方法制备的CL-20分解温度无明显变化;采用超声分散处理后的CL-20粒度为60~80μm,采用湿法粉碎工艺处理后的CL-20粒度为15~20μm,采用实验室高剪切分散乳化机粒度可达到10μm以下;三种工艺处理时间分别为150~180 min、45~60 min、20~30 min。

To reduce the mechanical,increase the process adaptability,and enhance the safety of industrial CL-20,the heroidized CL-20 was prepared respectively by ultrasonic dispersion,wet grinding and high-shear dispersing emulsification technology.The morphology,crystal form,particle size and thermal decomposition of CL-20 before and after treatment were tested by scanning electron microscope(SEM),X-ray diffraction(XRD),laser particle size analyzer and differential scanning calorimeter(DSC),and GJB 772A—1997 methods were adopted to test the mechanical sensitivities of CL-20.The results indicate that the particles size of CL-20 prepared by three methods isreduced,and the surface is smooth.The crystal form of the spherical CL-20 is epsilon(ε)as the same with raw CL-20.The mechanical sensitivities of spherical CL-20 decreased.The decomposition temperature of spheroidized CL-20 was prepared by high-shear dispersing emulsification process is 6.59℃lower than that of raw CL-20,while the decomposition temperature of CL-20 prepared by the other two methods has no obvious change.The particle size of spherical CL-20 treated by ultrasonic dispersion is 60~80μm,and that treated by wet grinding is 15~20μm.The particle size of spherical CL-20 treated by high-sheer dispersing emulsifier can reach less than 10μm.The processing time of the three processes was 150~180 min,45~60 min and 20~30 min,respectively.