文献类型：期刊文献

中文题名：乙醇和水在聚酰亚胺膜中的溶解和传递现象研究(Ⅰ)——吸收和解吸实验

英文题名：STUDY ON THE SOLUBILITY AND TRANSPORT PHENOMENA OF ALCOHOL AND WATER IN POLYEMIDE MEMBRANES (Ⅰ) MEASUREMENT OF SORPTION AND DESORPTION CURVES

作者：李军[1];许振良[1];刘洪来[1];胡英[1]

机构：[1]华东理工大学化学系,上海200237

年份：1997

卷号：48

期号：5

起止页码：517

中文期刊名：化工学报

外文期刊名：CIESC Journal

收录：CSTPCD;;Scopus;北大核心:【北大核心1996】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金资助项目(No.29506044)

语种：中文

中文关键词：膜分离;渗透;蒸发;聚酰亚胺;吸收;解吸;乙醇;水

外文关键词：membrane separation, pervaporation, polyimide, sorption, desorption, diffusion

摘要：用石英弹簧法测定了298.15 K、308.15 K和313.15 K下乙醇和水在聚酰亚胺膜中的吸收平衡数据和吸收解吸动力学数据,结果表明乙醇和水在聚酰亚胺膜中以吸附态和溶解态两种形式存在;乙醇和水在膜中的传质过程比较复杂,既有费克扩散类型也有非费克扩散类型;含交联剂的聚酰亚胺膜对水有溶解选择性,乙醇的解吸速度受交联剂的影响较大,表明交联剂的加入有利于提高聚酰亚胺膜的分离性能。
The equilibrium solubility and sorption/desorption curves for alcohol and water in a kind of polyimide membrane with and without crosslinking agent at 298. 15 K, 308. 15 K and 313. 15 K are measured by quartz-springs weighing method. Results show that both adsorbed and dissolved states of alcohol and water exist in this kind of polyimide membrane. Fickian diffusion or anomalous diffusion are found under different conditions. Crosslinking agent added to membrane can enhance the solubility of water and decrease the desorption rate of alcohol. It is shown that the crosslinking agent can improve the separation properties of polyimide membrane.