The wet phase separation: the effect of cast solution thickness on the appearance of macrovoids in the membrane forming ternary cellulose acetate/acetone/water system
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- 作者：Vogrin ; Nu&scaron ; a ; Stropnik ; Crtomir ; Musil ; Vojko ; Brumen ; Milan
- 关键词：Wet phase separation ; Macrovoid ; Cellulose acetate/acetone/water ; Cast thickness
- 刊名：Journal of Membrane Science
- 出版年：2002
- 出版时间：September 1, 2002
- 年：2002
- 卷：207
- 期：1
- 页码：139-141
- 全文大小：120 K
文摘
We report on novel observations on the appearance of macrovoids in the ternary cellulose acetate (CA)/acetone (ACE)/water membrane forming system. The membranes are prepared by the wet phase separation whereby the cast solution is composed of ACE and polymer, and the coagulation bath is pure water only. It is found that the macrovoid formation in a 12.5wt. % cast solution strongly depends on the cast solution thickness: macrovoids appear at the thickness of 500μm but not at 150 and 300μm.