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Investigation of pore formation for polyacrylonitrile base asymmetric membrane during phase inversion process

Authors： Jin Xin1, Li Lin1*, Wang Chunlei1, Liu Qiao1, Xu Ruisong1, Wang Tonghua*1, Kueirrarn Lee*2, Pan Yanqiu1

Units：（1State Key Laboratory of Fine Chemicals, R&D Center of Membrane Science, School of Chemical Engineering, Dalian University of Technology, Dalian 116024. 2R&D Center for Membrane Technology, Department of Chemical Engineering, Chung Yuan University, Taiwan 32023.）

KeyWords： polyacrylonitrile; asymmetric membrane; phase inversion; pore structure formation

ClassificationCode：TQ028.2

year,volume(issue):pagination： 2017,37(2):46-52

Abstract：

The asymmetric membranes were prepared by L-S phase inversion method. Optical microscopy was adopted to investigate the diffusion rate of non-solvent in casting solution. Light transmittance experiment, scanning electron microscopy and gas permeation test were used to investigate the effects of solvent type of the casting solution, casting solution concentration and evaporation time on the asymmetric membrane formation process. Results show that the pore structure of membrane formation process was affected significantly by technological conditions. Type of solvent affected the viscosity and intermiscibility of solvent and non-solvent, which caused the different diffusivity of non-solvent in casting solution and affected the pore structure formation during phase inversion process. Increasing the casting solution concentration caused the rise of viscosity and extension of evaporation time increased the dense membrane thickness which both decreased the diffusivity of non-solvent in casting solution and affected the pore structure formation during phase inversion process.

Funds：

国家自然科学基金(21506020,21436009,21576035,21376037); 中央高校基本科研业务费(DUT16RC(4)05); 中国博士后科学基金(2014M561232)

AuthorIntro：

第一作者简介：金鑫(1989-)，女，辽宁大连人，博士生，从事炭膜材料的研究 E-mail：jinxin925@126.com

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