化工进展2017，Vol.36Issue(8)：3024-3031,8.DOI:10.16085/j.issn.1000-6613.2017-0211
半互穿网络法制备聚偏氟乙烯复合超滤膜
Preparation of PVDF composite ultrafiltration membrane by semi-IPN method
杨丽 1栾金义 1杨永强 1奚振宇 1魏昕 1郭智1
作者信息
- 1. 中国石油化工股份有限公司北京化工研究院环境保护研究所,北京100013
- 折叠
摘要
Abstract
The polyvinylidene fluoride (PVDF) composite ultrafiltration membrane was prepared using semi-interpenetrating polymer network (semi-IPN) method.According to the membrane properties and its structure observed by SEM,the best conditions for building PVA/PVDF semi-IPN structure by acetalation of polyvinyl alcohol (PVA) and glutaraldehyde (GD) were that the addition of polyvinyl alcohol was 4.0％ (mass percentage) and the ratio of glutaraldehyde to PVA was 0.5 in the casting solution.Performance of the semi-IPN structure composite membrane reached the best when the casting solution formula was PVDF/PVA/PVP/GD/NMP=16/4/3/2/75,with the flux=612.3L/(m2·h),the contact angle=48.3°,the BSA rejection=98.7％,the blasting pressure=1.0MPa,and the adsorption capacity of BSA 45.3μtg/cm2.The composition and structure of the membrane were characterized by X-ray photoelectron spectroscopy (XPS) and infrared analyzer (FTIR).After treating practical petrochemical wastewater for a month,the water flux was 144.4L/(m2·h),the removal rate of COD was 80.4％,and the turbidity removal rate was about 97.2％.Compared with the parameters of the membrane prepared by the formula without the semi-IPN structure,the PVA/PVDF composite membrane had larger water flux,enhanced hydrophilicity,higher anti-pollution and backwashing capacity and therefore the comprehensive performance of the membrane was increased significantly.关键词
半互穿网络/聚偏氟乙烯/制备/膜/亲水性/废水Key words
semi-interpenetrating polymer network (semi-IPN)/polyvinylidene fluoride(PVDF)/preparation/membrane/hydrophilic/wastewater分类
化学化工引用本文复制引用
杨丽,栾金义,杨永强,奚振宇,魏昕,郭智..半互穿网络法制备聚偏氟乙烯复合超滤膜[J].化工进展,2017,36(8):3024-3031,8.
