摘要
采用界面聚合技术(IP)制备的复合纳滤膜在处理污水时,面临同时排斥二价阴离子或阳离子的挑战。此外IP反应生成的聚酰胺层存在选择性和渗透性的权衡问题(“trade-off”效应),这限制了复合纳滤膜性能。为此,本文利用壳聚糖与龙胆酸的层层自组装,在聚醚砜基膜表面构建带电中间层,随后通过IP制备新型双电荷复合纳滤膜,并对所制得的复合纳滤膜进行了详细表征。结果显示,在0.6 MPa压力下,该复合膜的纯水通量为114.53 L/(m^(2)·h);对于不同无机盐类溶液,均表现出优异的截留效果[98.66%(Na_(2)SO_4)、98.41%(MgSO_4)、65.13%(NaCl)、81.17%(MgCl_(2))]。此外,在长达48 h的连续过滤测试中,此复合膜展现了良好的稳定性。其双电荷结构以及高亲水性表面增强了分离过程中抵抗污染的能力。
The composite nanofiltration membranes prepared using interfacial polymerization technology(IP)face the challenge of simultaneously repelling divalent anions or cations when treating wastewater.In addition,the polyamide layer generated by IP reaction has a trade-off problem between selectivity and permeability(“trade-off”effect),which limits the performances of composite nanofiltration membranes.Therefore,this article utilized layer by layer self-assembly of chitosan and gentian acid to construct a charged intermediate layer on the surface of polyether sulfone based membranes,followed by the preparation of novel double charged composite nanofiltration membranes via IP.Then the composite nanofiltration membranes were characterized.The results show that under a pressure of 0.6 MPa,the pure water flux of the composite membrane is 114.53 L/(m^(2)·h).For different inorganic salt solutions,excellent retention effects are observed[98.66%(Na_(2)SO_(4)),98.41%(MgSO_(4)),65.13%(NaCl)and 81.17%(MgCl_(2))].In addition,during a continuous filtration test lasting up to 48 h,this composite membrane demonstrates good stability.Its dual charge structure and highly hydrophilic surface enhance the ability to resist contamination during the separation process.
作者
孙孟超
刘大朋
张明铎
洪耀良
SUN Mengchao;LIU Dapeng;ZHANG Mingduo;HONG Yaoliang(School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;Jiangsu Separation and Purification Materials and Technology Engineering Research Center,Suzhou 215009,China;Jiangsu Water Treatment Technology and Materials Collaborative Innovation Center,Suzhou 215009,China)
出处
《塑料工业》
北大核心
2025年第4期106-115,共10页
China Plastics Industry
关键词
界面聚合
层层自组装
双电荷
中间层
纳滤膜
聚醚砜
Interface Polymerization
Layer by Layer Self-assembly
Double Charge
Middle Layer
Nanofiltration Membrance
Polyether Sulfone
作者简介
通信作者:洪耀良,男,1965年生,博士,教授,主要研究膜法水处理技术。hongyaoliang407@126.com;孙孟超,男,2000年生,硕士研究生,主要研究污水处理与回用技术。3131650266@qq.com。
