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Preparation of antifouling PVDF membrane via plasma-induced surface zwitterionization
Authors: LI Yizhu,SONG Weilong,LI Zhipeng,YOU Hong
Units: Harbin Institute of Technology(Weihai),School of Marine Science and Technology,Shandong Weihai 264209
KeyWords: PVDF membrane; plasma grafting; zwitterionization; antifouling performance
ClassificationCode:X703.1
year,volume(issue):pagination: 2018,38(2):29-36

Abstract:
 In order to improve the antifouling performance of polyvinylidene fluoride (PVDF) membrane, dimethylamine ethyl methacrylate (DMAEMA) was first grafted onto the surface of PVDF membrane by plasma technology, and then reacted with 3-bromopropionic acid (3-BPA) by quaternization reaction., and finally the zwitterionic modified membrane(PVDF-g-PCBMA) was obtained. The chemical functional groups, structural morphology and hydrophobicity of PVDF membrane were analyzed by Fourier transform infrared spectroscopy (FTIR-ATR), scanning electron microscopy (SEM) and contact angle analyzer. The antifouling properties of the original membrane and the modified membrane against bovine serum albumin (BSA) and sodium alginate (SA) were investigated by dynamic filtration experiment. The result shows that the contact angle of PVDF-g-PCBMA membrane decreases from 88.27 ° to 39 ° comparing to the original membrane, and the hydrophilicity of PVDF-g-PCBMA membrane is improved greatly. The flux reduction rate of BSA and SA decreases, and the water flux recovery rate increases after cleaning, reflecting the good antifouling performance of the zwitterionic modified membrane.

Funds:
基金项目:2017年山东省自然科学基金(ZR2017MEE020)

AuthorIntro:
第一作者简介:李壹竹(1994-),女,辽宁省葫芦岛市人,硕士研究生,研究方向为膜改性及其抗污染性能研究,E-mail:496438918@qq.com 通讯作者,E-mail:youhong@hit.edu.cn

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