摘要：为解决蒙脱石因吸水膨胀、层状结构在剧烈环境条件下易破碎造成的测试精密度不理想的问题,分别考察超声时间、搅拌时间、搅拌速率和分散时间对颗粒粒度检测结果的影响,建立具有良好精密度的激光散射检测方法。结果表明:超声、长时间高转速搅拌不适合分散蒙脱石颗粒;搅拌1 min,并在2 min内完成测量,搅拌速率控制在450～1 600 r/min之间,能够获得重复性良好的检测结果;与扫描电子显微镜测试进行对比,两者结果相近。

Abstract: In order to sovle the problem of the precision of the results obtained by the existed methods from water absorption and expansion of montmorillonite，and breaking in its layered structure under severe conditions，we established the method with good precisions of laser light scattering method．The effects of ultrasonic time，stirring time，stirring rate and dispersing time on particle sizes were investigated．The results show that ultrasonic and high speed agitation are not suitable for dispersing montmorillonite particles．Under the conditions of moderate stirring rate between 450 and 1 600 r/min，proper dispersing time of 1 min，and measurement within 2 min，the particle size results with good repeatabilities can be obtained and the results are similar to those obtained by scanning electron microscope．

Keywords: montmorillonite; laser light scattering method; particle size analysis; precision