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管状复合炭膜的制备及其气体渗透性能

作者：田亮，李琳，王维，徐瑞松，洪周，顾学红，王同华

单位： 1大连理工大学化工学院大连市膜材料与膜过程重点实验室，大连116024 2南京工业大学化学化工学院材料化学工程国家重点实验室，南京211800

关键词：复合炭膜；气体分离；浸涂法；相转化法

DOI号：

分类号：

出版年,卷(期):页码： 2023,43(1):13-20

摘要：

以中空纤维陶瓷膜为载体，聚芳醚酮为聚合物前驱体，采用浸涂-相转化结合的方法制备复合炭膜，探讨了制膜工艺对复合炭膜结构及性能的影响。结果发现，铸膜液浓度和提拉速率对膜的完整性影响较大，在15%质量分数铸膜液和2cm/min提拉速率的条件下，可制备出表面膜层完整均一且兼具较高气体渗透通量的复合炭膜；通过控制制备前驱体膜过程中蒸发温度和蒸发时间，复合炭膜分离层缺陷大幅减少，气体分离选择性得到了显著提升。以15%铸膜液和2cm/min提拉速率，在60℃蒸发温度及10s蒸发时间的制膜工艺条件下制备出的复合炭膜，其O2/N2、CO2/N2和CO2/CH4分别为5.62、26.27、25.10，O2、CO2渗透通量分别可达252、1177GPU。

Using hollow fiber ceramic membrane as carrier and poly (aryl ether ketone) as polymer precursor, composite carbon membrane was prepared by combination of dip coating and phase transformation. The effects of preparation parameters on structure and performance of composite carbon membranes were investigated. The results showed that the concentration of casting solution and the pulling rate had a great influence on the integrity of the membrane. Under the conditions of 15% concentration of casting solution and 2cm/min pulling rate, the composite carbon membrane with complete and uniform surface membrane layer and high gas permeation rate could be prepared. By controlling the evaporation temperature and time in the precursor membrane preparation process, the defects of the composite carbon membrane separation layer were greatly reduced and the gas separation selectivity was significantly improved. The O2/N2, CO2/N2 and CO2/CH4 of the composite carbon membrane prepared under the evaporation time of 10s and evaporation temperature of 60℃ were 5.62, 26.27 and 25.10 respectively, and the permeation rates of O2 and CO2 were 252 and 1177 GPU respectively.

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作者简介：

田亮（1997-），男，山西太原人，硕士研究生，研究方向：管状复合炭膜制备，Email：2385026732@qq.com

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