有机碱多乙烯多胺对聚偏氟乙烯超滤膜结构和性能的影响  

Effect of organic base polyethylene polyamine on the structure and properties of poly(vinylidene fluoride) ultrafiltration membranes

作　　者：华河林[1] 刘贤辉[1] 李娜[1] 符才杰[1] 

机构地区：[1]南昌航空大学环境与化学工程学院,南昌330063

出　　处：《膜科学与技术》2013年第5期30-33,37,共5页Membrane Science and Technology

基　　金：国家自然科学基金(20906044);江西省自然科学基金(2010GQH0109);江西省科技攻关项目(2010BGB00500);江西省教育厅项目(GJJ11525)

摘　　要：将有机碱多乙烯多胺直接加到聚偏氟乙烯(PVDF)铸膜液中,利用L-S相转化法制备PVDF超滤膜;运用红外光谱、扫描电镜、接触角仪等对不同多乙烯多胺含量超滤膜的结构和性能进行表征.结果表明,多乙烯多胺的加入使PVDF超滤膜产生脱氟化氢反应,超滤膜的润湿性有明显改善.随着多乙烯多胺含量的增加,膜通量不断上升;当多乙烯多胺含量不超过6%时,超滤膜对BSA的截留率基本保持不变,当含量超过6%时,超滤膜的截留率明显下降.Organic base of polyethylene polyamine was added directly to the casting solution of poly （vinylidene fluoride） （PVDF）. PVDF ultrafiltration membrane was prepared by using L-S phase inversion technique. Then, the structure and properties of the prepared membranes were characterized by means of IR, SEM, contact angle test, et al. The results indicated that dehydrogenation fluoride reaction on thesurface of PVDF ultrafitration membranes was produced by the addition of polyethylene polyamme. Wetting of ultrafitration membranes was improved significantly. Flux of membranes was increased constantly as rising the contents of polyethylene polyamine. The BSA retention rate was unchanged essentially at the content of polyethylene polyamine no more than 6%, while the ultrafiltration membrane retention rate was decreased significantly at the content of polyethylene polyamine more than 6 %.

关 键 词：聚偏氟乙烯 多乙烯多胺 浸没沉淀相转化 性能表征 

分 类 号：TQ325.4[化学工程—合成树脂塑料工业]