PU对改善PSF/PU共混超滤膜性能的影响  

Effect of PU on Improving Performance of PSF /PU Blend Ultrafiltration Membrane

作　　者：王倩倩[1] 王鸿儒[1] 张小波[1] 罗琼[1] 

机构地区：[1]陕西科技大学资源与环境学院,陕西西安710021

出　　处：《塑料工业》2014年第2期24-27,共4页China Plastics Industry

摘　　要：为提高聚砜(PSF)超滤膜亲水性,增强其抗污染能力,以聚氨酯(PU)作为改性剂,采用沉淀相转化法制备PSF/PU共混超滤膜。用溶解度参数和共溶剂法等预测了PSF/PU是部分相容体系。同时,用接触角测定仪和拉伸强度仪对膜的亲水性、机械性能等进行了表征。结果表明,PU加入后,共混膜的接触角从90.17°下降到73.9°,亲水性提高;对明胶的吸附量从122.36μg/cm2下降为88.64μg/cm2,抗污染性提高;在m(PSF)/m(PU)=80/20时,膜的断裂伸长率由17.78%升高到36.78%,机械性能提高。In order to improve hydrophilicity and antifouling capacity of polysulfone （PSF） membrane,PSF/PU blend ultrafiltration membrane was prepared by phase inversion method in the presence of polyurethane （PU） as modifier.The compatibility of PSF/PU was predicted by the method of solubility parameter and co-solvent.The hydrophilicity and mechanical property of membrane were characterized nsing contact angle （CA） and tensile tester.The experimental results indicated that the contact angle descends from 90.17°to 73.9°and gelatin adsorption descended from 122.36 μg/cm2to 88.64 μg/cm2,and the hydrophilicity and antifouling performance of the membranes were all significantly improved.When PSF/PU was 80/20,the elongation at break of membrane increased from 17.78% to 36.78%,which meant an improvement of mechanical properties.

关 键 词：聚砜 聚氨酯 共混超滤膜 抗污染 

分 类 号：TQ320.721[化学工程—合成树脂塑料工业]