膜科学与技术

空气段间距对CA/PES共混超滤膜影响

作者：顾志云，许振良，魏永明，杨虎

单位：化学工程联合国家重点实验室，华东理工大学化学工程研究所膜科学与工程研发中心，上海200237

关键词：空气段；共混；超滤膜；醋酸纤维素；聚醚砜

出版年,卷(期):页码： 2016,36(5):31-35

摘要：

采用带空气段的非溶剂致相分离(NIPS)法制备了CA/PES共混中空纤维超滤膜。通过前期实验确定了CA/PES溶液的总浓度为25wt%，CA和PES的质量比为9:1。研究了空气段间距(1-17 cm)对CA/PES共混超滤膜的性能的影响。实验结果表明，空气段间距为9cm时，CA/PES共混超滤膜的通量为73.3L•m-2•h-1，对PEG20000的截留率达84.2%，膜孔径为4.6nm。

CA/PES hollow fiber ultra-filtration (UF) membranes were prepared via non-solvent induced phase separation (NIPS)method with air gap. Based on the previous experiments, the total concentration of cellulose acetate (CA)/ polyethersulphone (PES) blend solution was chosen as 25wt% and the mass ratio of CA/PES was 9:1. The effect of the air-gap distance on the performance of CA/PES UF membranes was investigated. The results showed that the UF membrane has a pure water flux of 73.3L•m-2•h-1, a PEG20000 rejection of84.2% and 4.6 nm pore size when the UF membrane was prepared with an air gap of9 cm.

作者简介：顾志云（1990-），女，江苏泰州人，硕士研究生，主要从事膜分离技术的研究工作。通讯联系人：魏永明，Tel：021-64253670；Email：ymwei@ecust.edu.cn

参考文献：

[1] Mohammad A W, Teowa Y H, Ang W L, et al.Nanofiltration membranes review: Recent advances and future prospects[J]. Desalination, 2015, 356: 226-254.
[2] Han B X, Zhang D L, Shao Z Q, et al. Preparation and characterization of cellulose acetate/carboxymethyl cellulose acetate blend ultrafiltration membranes[J]. Desalination, 2013, 311: 80-89.
[3] Saljoughi E, Mohammadi T. Cellulose Acetate(CA) Polyvinylpyrrolidone(PVP) Blend Asymmetric Membranes: Preparation, Morphology and Performance[J]. Desalination, 2009, 249(2): 850-854.
[4] El Badawi N, Ramadan A R, Esawi A M K, et al. Novel carbon nanotube cellulose acetate nanocomposite membranes for water filtration applications[J]. Desalination, 2014, 344: 79-85.
[5] Yu S C, Cheng Q B, Huang C M, et al. Cellulose acetate hollow fiber nanofiltration membrane with improved permselectivity prepared through hydrolysis followed by carboxymethylation[J]. J. Membr. Sci., 2013, 434: 44-54.
[6] 吕少丽, 王红军, 徐又一. 聚醚砜超滤膜的亲水化改性研究进展[J]. 膜科学与技术, 2005, 25(3): 80-84.
[7] Hu D,Xu Z L,Wei Y M, et al. Poly(styrene sulfonic acid) sodium modified nanofiltration membraneswith improved permeability for the softening of highlyconcentrated seawater. Desalination, 2014, 336:179–186.
[8] 占琦伟, 许振良, 胡登. NIPS法制备小孔径SPES-PES共混UF膜及其性能表征[J]. 膜科学与技术, 2014, 34(2):28-31.
[9] Mahendran R, Malaisamy R, Mohan D R. Cellulose acetate and polyethersulfone blend ultrafiltration membranes. Part I: Preparation and Characterizations[J]. Polym. Adv. Techn., 2004, 15(3): 149-157.
[10] Mahendran R, Malaisamy R, Mohan D R. Cellulose Acetate–Poly(ether sulfone) Blend Ultrafiltration Membranes. II. Application Studies[J]. J. Appl. Polym. Sci.e, 2004, 92(6): 3659 -3665.
[11] Shobana K H, Krithika K, Radha K S, et al. Effect of maleic acid additive on the preparation and performance of CA/PES blend ultrafi ltration membranes[J]. Asia-Pacific J. Chem. Eng., 2013, 8(5): 699-707.
[12] Korminouri F, Rahbari-Sisakht M, Rana D, et al. Study on the effect of air-gap length on properties and performance of surface modified PVDF hollow fiber membrane contactor for carbon dioxide absorption[J]. Sep. Purif. Techn., 2014, 132: 601-609.
[13] Michaels S. Analysis and prediction of sieving curves for ultrafiltration membranes:a universal correlation[J]. Sep. Sci. Techn., 1980, 15(6): 1305-1322.
[14] Tasselli F, Jansen J C, Sidari F, et al. Morphology and transport property control of modified poly(ether ether ketone) (PEEKWC) hollow fiber membranes prepared from PEEKWC/PVP blends: influence of the relative humidity in the air gap[J]. J. Membr. Sci., 2005, 255(1-2): 13-22.
[15] 祝振鑫. 膜材料的亲水性, 膜表面对水的湿润性和水接触角的关系[J]. 膜科学与技术, 2014, 34(2):1-4.

服务与反馈：

【文章下载】【加入收藏】

《膜科学与技术》编辑部地址：北京市朝阳区北三环东路19号蓝星大厦邮政编码：100029 电话：010-64426130/64433466 传真：010-80485372邮箱：mkxyjs@163.com