CIESC Journal

• 化工学报 •    下一篇

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

李军,许振良,刘洪来,胡英   

  1. 华东理工大学化学系,华东理工大学化学系,华东理工大学化学系,华东理工大学化学系 上海 200237 ,上海 200237 ,上海 200237 ,上海 200237
  • 出版日期:1997-10-25 发布日期:1997-10-25

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

Li Jun, Xu Zhenliang , Liu Honglai and Hu Ying( Department of Chemistry, East China University of Science and Technology, Shanghai 200237)   

  • Online:1997-10-25 Published:1997-10-25

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。

Abstract: 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.

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