文献类型：期刊文献

中文题名：相对润湿度概念及其在挤出—滚圆法造粒中的应用

英文题名：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：[1]华东理工大学化工机械研究所,上海200237

年份：2003

期号：3

起止页码：26

中文期刊名：机械工程师

外文期刊名：Mechanical Engineer

基金：国家中医药管理局重点中药生产装备开发项目

语种：中文

中文关键词：相对润湿度;接触角;透过速度法;挤出-滚圆法

外文关键词：relative wetting degree;contact angle;permeating speed measurement;extrusion-spheronization

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.