两性离子纳滤膜的制备及抗污染性能研究  

Preparation of zwitterion nanofiltration membrane and its anti-fouling performance

作　　者：王新乐 刘铭辉 于海军[3] 康国栋[3] 曹义鸣[3] 李霞 付晓燕 WANG Xinle;LIU Minghui;YU Haijun;KANG Guodong;CAO Yiming;LI Xia;FU Xiaoyan(CNOOC EnerTech Beijing Research Institute of Engineering&Technology for Safety&Environment,Tianjin 300457,China;CNOOC Energy Conservation and Environmental Protection Service Co.,Ltd.,Tianjin 300457,China;Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China;Zhongyuan University of Technology,Zhengzhou 450007,China;Dalian Ecological Environment Monitoring Center,Dalian 116023,China)

机构地区：[1]中海油能源发展股份有限公司北京安全环保工程技术研究院,天津300457 [2]中海油节能环保服务有限公司,天津300457 [3]中国科学院大连化学物理研究所,大连116023 [4]中原工学院,郑州450007 [5]辽宁省大连生态环境监测中心,大连116023

出　　处：《膜科学与技术》2021年第6期51-59,共9页Membrane Science and Technology

基　　金：海油发展科技项目(HFKJ-CGXM-AQ-2020-01);大连市科技创新基金应用基础研究项目(2019J12SN67);辽宁省自然科学基金(2019-MS-313)。

摘　　要：采用K_(2)S_(2)O_(8)氧化聚砜膜产生活性羟基,通过接枝-交联法将N,N-二甲基N-(2-甲基丙烯酰胺乙基)N-(3-磺丙基)铵(MPDSAH)和丙烯酰胺(AAm)聚合交联到膜表面,制备两性离子复合纳滤膜.利用ATR/FTIR、XPS、SEM和接触角测定仪对膜进行表征,并考察接枝改性溶液中MPDSAH和AAm不同比例对膜渗透分离性能和抗污染性能的影响.结果表明,经过化学接枝交联,可在聚砜膜表面形成新的分离层,而且随着接枝单体MPDSAH含量的增加,两性离子复合纳滤膜的表面亲水性和截留能力逐渐增强,但膜通量先增加后降低;两性离子复合纳滤膜对不同无机盐的截留顺序为Na_(2)SO_(4)>MgSO_(4)>NaCl>MgCl_(2);聚砜膜表面的接枝改性层稳定性好,使用过程中不易脱落.Polysulfone membrane was oxidized by potassium persulfate to produce active hydroxyl groups.The zwitterionic nanofiltration membrane was prepared by grafting and crosslinking the MPDSAH and AAm to the membrane surface.The changes of the membrane surface before and after modification were characterized by ATR/FTIR,XPS,SEM and Contact angle measurement.The effects of different proportions of MPDSAH and AAm in grafted solution on the permeation separation performance and antifouling performance of the membrane were investigated.The results showed that a new separation layer could be formed on the surface of the polysulfone membrane through chemical grafting and crosslinking.The surface hydrophilicity and rejection rate of the zwitterionic nanofiltration membrane gradually increased with the concentration of grafted monomer MPDSAH,but the flux firstly increased then decreased.The rejection order of different inorganic salts by the zwitterionic nanofiltration membrane was Na_(2)SO_(4)>MgSO_(4)>NaCl>MgCl_(2).The grafted layer on the surface of the polysulfone membrane was stable and not easy to fall off during use.

关 键 词：纳滤膜 接枝改性 交联 抗污染 

分 类 号：TQ028.8[化学工程]