The preparation of natural brucite nanofibers through dispersion by the wet process is described. The test results indicate that brucite fibers can be well dispersed by using sodium dioctyl sulfosuccinate （OT） as th...The preparation of natural brucite nanofibers through dispersion by the wet process is described. The test results indicate that brucite fibers can be well dispersed by using sodium dioctyl sulfosuccinate （OT） as the dispersant at a dispersant/fiber mass ratio of 0.15：1, dispersing for 30 min at a water/solid mass ratio of 20：1. The prepared nanofibers were characterized with X-ray diffraction （XRD）, scanning electron microscope （SEM）, and transmission electron microscope （TEM）. It is shown that the prepared single brucite nanofiber is around 30 nm in diameter and the talus of the nonsingle brucite nanofibers is about 50-150 nm in diameter. Natural brucite mineral fibers were treated by the dispersion method to obtain nanomaterials. These fibers have significant advantages over artificial nanofibers both in yield and in cost.展开更多
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...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。展开更多
基金This study was financially supported by the National High-Tech Research and Development Program of China (No.2003AA302610)
文摘The preparation of natural brucite nanofibers through dispersion by the wet process is described. The test results indicate that brucite fibers can be well dispersed by using sodium dioctyl sulfosuccinate （OT） as the dispersant at a dispersant/fiber mass ratio of 0.15：1, dispersing for 30 min at a water/solid mass ratio of 20：1. The prepared nanofibers were characterized with X-ray diffraction （XRD）, scanning electron microscope （SEM）, and transmission electron microscope （TEM）. It is shown that the prepared single brucite nanofiber is around 30 nm in diameter and the talus of the nonsingle brucite nanofibers is about 50-150 nm in diameter. Natural brucite mineral fibers were treated by the dispersion method to obtain nanomaterials. These fibers have significant advantages over artificial nanofibers both in yield and in cost.
