He Gaohong   

Professor
Supervisor of Doctorate Candidates
Supervisor of Master's Candidates

Title : Director of R & D Center of Membrane Science and Technology

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Language:English

Paper Publications

Title of Paper:超临界CO2法制备乙酸纤维素微孔膜

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Date of Publication:2009-01-05

Journal:化工进展

Included Journals:PKU、ISTIC、CSCD

Volume:28

Issue:1

Page Number:121-125

ISSN No.:1000-6613

Key Words:超临界CO2;乙酸纤维素;水通量

Abstract:以超临界CO2为非溶剂,丙酮和 N,N-二甲基甲酰胺(DMF)为溶剂,制备了乙酸纤维素(CA)微孔膜,采用扫描电镜表征膜的微观形态并测定了膜的纯水通量,考察了溶剂与CO2的亲和性、CA质量分数、成膜压力,成膜温度,保压时间和卸压速度等因素对膜形态及性能的影响.实验结果表明,以丙酮为溶剂可制备出表观形态均一完整的膜;随着CA质量分数的增加,膜孔径变小,膜的水通量迅速降低:随着戍膜压力、成膜温度的升高,膜水通量均先增加后减小;保压时间及卸压速度对膜水通量的影响较小.当CA质量分数为10%时,在成膜压力为15 MPa,成膜温度为45℃,保压45 min,快速卸压的操作条件下,微孔CA膜的水通量可达30 L·m-2·min-1.

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