PA/PEG交联共聚反渗透膜的制备及耐污染性能

doi:10.16085/j.issn.1000-6613.2020-2558

化工进展 ›› 2021, Vol. 40 ›› Issue (12): 6792-6799.DOI: 10.16085/j.issn.1000-6613.2020-2558

PA/PEG交联共聚反渗透膜的制备及耐污染性能

徐荣¹(), 李燕¹, 郭猛¹, 任秀秀¹, 吴楠桦¹, 张琪¹, 钟璟¹(), 陈波²

^1.常州大学石油化工学院，江苏省绿色催化材料与技术重点实验室，江苏常州 213164
^2.江苏峰伟环境科技有限公司，江苏常州 213164

收稿日期:2020-12-23 修回日期:2021-02-08 出版日期:2021-12-05 发布日期:2021-12-21
通讯作者: 钟璟
作者简介:徐荣（1983—），副教授，硕士生导师，研究方向为反渗透和渗透汽化膜过程及有机硅膜材料。E-mail：xurong@cczu.edu.cn。
基金资助:
江苏省高校自然科学研究重大项目(18KJA530001);江苏省绿色催化材料与技术重点实验室项目(BM2012110);江苏省先进催化与绿色制造协同创新中心项目（常州大学）

Fabrication and anti-fouling performance of PA/PEG cross-linked copolymer reverse osmosis membranes

XU Rong¹(), LI Yan¹, GUO Meng¹, REN Xiuxiu¹, WU Nanhua¹, ZHANG Qi¹, ZHONG Jing¹(), CHEN Bo²

^1.Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, Jiangsu, China
^2.Jiangsu Fining Wit Environment Technology Company Limited, Changzhou 213164, Jiangsu, China

Received:2020-12-23 Revised:2021-02-08 Online:2021-12-05 Published:2021-12-21
Contact: ZHONG Jing

摘要/Abstract

摘要：

以聚丙烯腈（PAN）超滤膜为基底，在均苯三甲酰氯（TMC）和间苯二胺（MPD）界面聚合反应过程中引入聚乙二醇（PEG），制备聚酰胺（PA）/PEG反渗透复合膜。利用傅里叶红外光谱（FTIR）、X射线光电子能谱（XPS）、场发射扫描电镜（FE-SEM）和原子力显微镜（AFM）等对膜的结构和物化性质进行了表征。考察了PEG分子量、PEG加入量、热处理温度及时间对膜反渗透性能的影响，并系统考察了膜对十二烷基硫酸钠（SDS）、十二烷基三甲基溴化铵（DTAB）以及牛血清蛋白（BSA）三种不同荷电性典型污染物的耐受性能。实验结果表明，相比于未改性的PA反渗透膜，PEG交联共聚反渗透膜的盐截留率和通量恢复率均有所提高。其中PA/PEG1000-0.1膜渗透通量为3.96kg/(m²?h)，NaCl表观截留率为97.5%，并且对于SDS、DTAB和BSA都表现出较高的耐污染性，其中，SDS污染清洗后膜的通量恢复率可达89.4%。

关键词: 耐污染, 反渗透, 聚乙二醇, 膜, 脱盐

Abstract:

Polyethylene glycol (PEG) modified polyamide (PA) reverse osmosis (RO) composite membranes were fabricated via an interfacial polymerization of trimesoyl chloride (TMC) and m-phenylenediamine (MPD) with PEG using the polyacrylonitrile (PAN) ultrafiltration membranes as the supports. Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscope (FE-SEM) and atomic force microscope (AFM) were used to characterize the textural and physicochemical properties of the membranes. The effects of PEG molecular weight, PEG content, heat treatment temperature and time on RO performances of the membranes were investigated. Moreover, three typical pollutants, sodium dodecyl sulfate (SDS), dodecyl trimethyl ammonium bromide (DTAB) and bovine serum albumin (BSA) were used to examine fouling resistance of the membranes. Compared with the unmodified PA membranes, the salt rejection and flux recovery of PEG cross-linked PA membranes were improved. The PA/PEG1000-0.1 membranes delivered an observed NaCl rejection of 97.5% and a water flux up to 3.96kg/(m²?h). Moreover, the membrane exhibited high fouling resistance to SDS, DTAB and BSA with a flux recovery rate of 89.4% after fouling of SDS.

Key words: antifouling, reverse osmosis, poly(ethylene glycol), membranes, desalination

中图分类号:

TQ028

徐荣, 李燕, 郭猛, 任秀秀, 吴楠桦, 张琪, 钟璟, 陈波. PA/PEG交联共聚反渗透膜的制备及耐污染性能[J]. 化工进展, 2021, 40(12): 6792-6799.

XU Rong, LI Yan, GUO Meng, REN Xiuxiu, WU Nanhua, ZHANG Qi, ZHONG Jing, CHEN Bo. Fabrication and anti-fouling performance of PA/PEG cross-linked copolymer reverse osmosis membranes[J]. Chemical Industry and Engineering Progress, 2021, 40(12): 6792-6799.

图/表 11

图1 PA/PEG反渗透复合膜的制备示意图

图2 复合膜的AFM和SEM照片（热处理条件：70℃、5min）

图3 PA、PA/PEG1000-0.1膜的FTIR谱图和XPS谱图（热处理条件：70℃、5min）

表1 PA膜和PA/PEG1000-0.1膜表面元素丰度分析

膜	C质量分数/%	N质量分数/%	O质量分数/%
PA	57.16	11.96	30.88
PA/PEG	56.00	11.85	32.15

图4 PA/PEG1000膜的水接触角（热处理条件：70℃、5min）

图5 PEG分子量对PA/PEG-0.1复合膜分离性能的影响[热处理条件：70℃、5min，操作条件：(25±1)℃、1.0MPa]

图6 PEG含量对PA/PEG1000复合膜分离性能的影响[热处理条件：70℃、5min，操作条件：(25±1)℃、1.0MPa]

图7 热处理条件对PA/PEG1000-0.1复合膜分离性能的影响[操作条件：(25±1)℃、1.0MPa]

图8 复合膜处理SDS水溶液归一化通量随时间变化[操作条件：(25±1)℃、1.0MPa]

图9 复合膜处理DTAB水溶液归一化通量随时间变化[操作条件：(25±1)℃、1.0MPa]

图10 复合膜处理BSA水溶液归一化通量随时间变化[操作条件：(25±1)℃、1.0MPa]

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PA/PEG交联共聚反渗透膜的制备及耐污染性能

Fabrication and anti-fouling performance of PA/PEG cross-linked copolymer reverse osmosis membranes

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