新型磺化聚芳醚砜复合反渗透膜的制备及性能  

Preparation and properties of novel composite reverse osmosis membrane based on sulfonated poly(arylene ether sulfone)

作　　者：万莹 李政 刘文 杨扬 白媛媛 毛宗久 Wan Ying;Li Zheng;Liu Wen;Yang Yang;Bai Yuanyuan;Mao Zongjiu(China National Pulp and Paper Research Institute Co.,Ltd.,National Engineering Lab for Pulp and Paper,Beijing 100102,China)

机构地区：[1]中国制浆造纸研究院有限公司制浆造纸国家工程实验室,北京100102

出　　处：《石油化工》2021年第12期1268-1273,共6页Petrochemical Technology

摘　　要：制备了聚砜多孔支撑层,再以含羧基的磺化聚芳醚砜(CSPAES)为分离层,聚乙烯醇(PVA)为交联剂,采用刷涂法、通过热交联方式在聚砜多孔支撑层上制备了具有交联结构的CSPAES-PVA复合反渗透膜。利用1H NMR、SEM、接触角测试、电位分析等方法考察了复合反渗透膜的微观形貌及性能。实验结果表明,复合反渗透膜的表面平整、致密、无缺陷,分离层的厚度约为400 nm;随PVA含量的增加,复合反渗透膜的表面亲水性提高、电负性减弱、截盐率提高;当PVA的含量为0.10%(w)时,复合反渗透膜的截盐率可达98.6%,水通量为12.5 L/(m^(2)·h);且对0.2%(w)NaClO水溶液表现出优异的稳定性,浸泡24 h后,膜的渗透性能基本不变,优于商业聚酰胺反渗透膜。The composite reverse osmosis membranes were prepared by coating method,using sulfonated poly(arylene ether sulfone)containing carboxylic acid group(CSPAES)as separation layer and polyvinyl alcohol(PVA)as crosslinker on polysulfone porous support,following by thermal crosslinking.The surface properties and micromorphology of the membranes were characterized by 1H NMR,SEM,contact angle test and potential analysis.The experimental results indicate that,the reverse osmosis membrane has a flat,dense and defect-free separation layer,with a thickness of 400 nm.With PVA content increasing,the hydrophilicity of the reverse osmosis membrane is improved,with electronegativity decreasing and salt rejection increasing.When PVA content is 0.10%(w),the reverse osmosis membrane shows a salt rejection of 98.6%,with a water flux of 12.5 L/(m^(2)·h).Furthermore,the permeation property of the membrane is almost unchanged after exposure to 0.2%(w)NaClO for 24 h,which is better than that of commercial polyamide membrane.

关 键 词：聚砜多孔支撑层 含羧基的磺化聚芳醚砜 聚乙烯醇 反渗透膜 耐氯性 

分 类 号：TQ326.55[化学工程—合成树脂塑料工业]