相对润湿度概念及其在挤出—滚圆法造粒中的应用  

Relative Wetting Degree and Its Application on Preparation of Pellets by Extrusion-spheronization

作　　者：孔令超[1] 潘家祯[1] 崔宁[1] 陈理清[1] 

机构地区：[1]华东理工大学化工机械研究所,上海200237

出　　处：《机械工程师》2003年第3期26-28,共3页Mechanical Engineer

基　　金：国家中医药管理局重点中药生产装备开发项目

摘　　要：首次提出了相对润湿度(RWD)概念,将润湿接触角的余弦值之比作为液体对粉体润湿程度的表征参数,为解决比较不同液体对同一粉体的润湿能力的难题提供了理论依据。以乙醇水溶液和微晶纤维素为试验材料,采用透过速度法测定了相对润湿度,被用于挤出-滚圆法造粒过程物料配方的优化,使其概念的实用性得到很好的验证。The conception of relative wetting degree(RWD)was proposed for the first time,which is ratio of a cosine of wetting contact angle of a liquid and a powder to the one of another liquid and the same powder as a parameter of wetting degree.A theoretical basis was offered to compare the wettability of a powder and different liquids.The practicability of RWD was confirmed in preparation of pellets by extrusion -spheronization,in which the RWD of ethanol solution in different levels and microcrystalline cellulose were obtained by permeating speed measurement.

关 键 词：相对润湿度 接触角 透过速度法 挤出-滚圆法 

分 类 号：TH6[机械工程—机械制造及自动化]