添加剂PEG对CPVC/PVB共混膜性能的影响

doi:10.16085/j.issn.1000-6613.2017.04.031

化工进展 ›› 2017, Vol. 36 ›› Issue (04): 1388-1394.DOI: 10.16085/j.issn.1000-6613.2017.04.031

添加剂PEG对CPVC/PVB共混膜性能的影响

刘倩文, 张小娟, 顾倩倩, 王军

东华大学环境科学与工程学院, 国家环境保护纺织污染防治工程技术中心, 上海 201620

收稿日期:2016-10-18 修回日期:2016-11-02 出版日期:2017-04-05 发布日期:2017-04-05
通讯作者: 王军,副教授,研究方向为膜分离技术。E-mail:wangj@dhu.edu.cn。
作者简介:刘倩文(1993-),女,硕士研究生,研究方向为膜分离技术。E-mail:vingo.liu@qq.com。

Effects of additive PEG on the properties of CPVC/PVB blended membranes

LIU Qianwen, ZHANG Xiaojuan, GU Qianqian, WANG Jun

College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai 201620, China

Received:2016-10-18 Revised:2016-11-02 Online:2017-04-05 Published:2017-04-05

摘要/Abstract

摘要： 探讨了聚乙二醇（PEG）分子量（400、600、1000、1500、2000、4000和6000）对氯化聚乙烯/聚乙烯醇缩丁醛（CPVC/PVB）超滤膜微观结构及其性能（纯水通量、截留率、机械强度和耐污染性能）的影响。结果表明：PEG分子量小于6000时，CPVC/PVB共混膜断面的指状大孔被疏松的多孔结构取代，PEG达到6000时，膜断面出现指状大孔结构，其微观结构与未加添加剂时的微观结构基本一致；PEG分子量为400和600时，CPVC/PVB共混膜表面为多孔结构，随着PEG分子量的增大，膜表面趋于致密。添加不同分子量PEG，均能使CPVC/PVB共混膜的水通量和耐污染性能大幅提升，其中PEG4000和PEG6000提高最多，但膜的截留率和机械性能略有下降。经过比较PEG6000作为添加剂，CPVC/PVB共混膜的性能较优。

关键词: CPVC/PVB共混膜, 膜性能, 添加剂PEG, 耐污染性

Abstract: Effect of additive PEG molecular weights on the microstructures and properties of CPVC/PVB blended membranes was discussed in this paper. It was found that the finger-like macrovoids structure in the microstructures of CPVC/PVB blended membranes cross section was replaced by porosity microstructure when the molecular weight was less than 6000. The finger-like macrovoids structure reappeared when the molecular weight was up to 6000 and the cross section microstructure was close to that of CPVC/PVB blended membranes which were free of additive. The microstructure of membrane surface was porosity structure when the molecular weight was 400 and 600, respectively. With the increase of molecular weight, the microstructure of membrane surface tended to be dense. All the PEGs increased the permeability and antifouling properties of CPVC/PVB blended membranes remarkably. Among them PEG 4000 and PEG 6000 increased much more. However, the retention and mechanical property declined a little. PEG 6000 as an additive could make CPVC/PVB blended membranes have better membrane properties.

Key words: CPVC/PVB blended membranes, membrane properties, additive PEG, antifouling properties

中图分类号:

TQ028.8

刘倩文, 张小娟, 顾倩倩, 王军. 添加剂PEG对CPVC/PVB共混膜性能的影响[J]. 化工进展, 2017, 36(04): 1388-1394.

LIU Qianwen, ZHANG Xiaojuan, GU Qianqian, WANG Jun. Effects of additive PEG on the properties of CPVC/PVB blended membranes[J]. Chemical Industry and Engineering Progress, 2017, 36(04): 1388-1394.

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添加剂PEG对CPVC/PVB共混膜性能的影响

Effects of additive PEG on the properties of CPVC/PVB blended membranes

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