膜科学与技术

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Preparation and performance exploration of oil-water separation membrane with imitated spider web structure

Authors： WANG Qi ,DENG Xuesong ,ZHENG Tiantian ,GAO Yixin ,CHENG Qi ,YANG Jing , QIANG Rongrong ,LI Xinyang ,MA Wensong ,LIN Ligang ,ZHANG Yuzhong

Units： State Key Laboratory of Separation Membranes and Membrane Processes, School of Materials Science and Engineering，Tiangong University, Tianjin 300387, China

KeyWords： Hydrogel; membrane separation; oil-water separation; bionic; modification

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2021,41(2):9-17

Abstract：

Hydrogels with three-dimensional network structure and hydrophilic properties have attracted much attention for the modification of separation membranes. In this paper, polyvinylidene fluoride (PVDF) membrane is used as the substrate, and carboxymethyl cellulose (CMC) is introduced into the membrane surface through self-crosslinking, and a CMC-PVDF modified membrane with a spider web structure is prepared, which separates oil and water from the membrane. Performance, anti-pollution performance, mechanical performance, etc. were investigated. The results show that coMPared with the raw membrane, the oil-water emulsion flux of the modified membrane increased by 4 times to 612 L/(m2·h), and the oil-water separation performance increased from 74% to more than 94%; The modified membrane has better anti-pollution ability;CoMPared with the raw membrane, the elastic modulus of the CMC-PVDF modified membrane has increased from 3.647 MPa to 14.86 MPa, and the elongation has increased from 31.5% to 58.4%. This is related to the spider web structure on the surface of the membrane. Through the method described in this study, a modified membrane material with high separation performance, anti-fouling performance and mechanical performance was obtained, which has certain reference value for the study of separation membrane modification.

Funds：

国家自然科学基金(22078244、21676199)，全国大学生创新训练项目（201910058007）

AuthorIntro：

汪祺（1995-），男，浙江嵊州人，硕士研究生，主要从事分离膜的研究

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