聚(N-异丙基丙烯酰胺)接枝聚丙烯多孔膜的油水分离及易清洗性能  

Performances of oil/water separation and easy-cleaning for poly(N-isopropylacrylamide)grafted porous polypropylene membrane

作　　者：叶远松[1] 李冰[1] 黄健[1] 王晓琳[2] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009 [2]清华大学化学工程系,北京100084

出　　处：《南京工业大学学报（自然科学版）》2016年第6期57-62,共6页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家重点基础研究发展计划(973计划)(2009CB623404);国家自然科学基金(20476045);江苏省大学生创新创业训练计划(201510291090X)

摘　　要：以等离子体引发方法制备聚(N-异丙基丙烯酰胺)(PNIPAAm)接枝的聚丙烯(PP)多孔膜。在考察改性膜表面润湿及水通量温敏性的基础上,详细研究改性膜在处理乳化油废水时的油水分离及变温清洗性能。结果表明:因表面亲水性改善,改性膜在低临界溶解温度(LCST)以下油水分离时的通量衰减明显减缓,在LCST以上的稳定通量明显增大,油截留率超过了99%。经简单的变温(35℃/25℃)水清洗,污染膜的水通量恢复率达89.7%。PNIPAAm的体积相转变是改性膜表面易清洗的原因。The poly（N-isopropylacrylamide） （PNIPAAm） grafted porous polypropylene （PP） membrane was prepared by a plasma method. After investigation on both thermosensitive behaviors of surface wettability and water flux for the modified membrane, its performances of oil/water separation and temperature-change cleaning were evaluated in detail. Benefiting from hydrophilic improvement on the surface,the modified membrane exhibited significant relief in flux decline below the lower critical solution temperature （ LCST） of PNIPAAm and showed much larger steady fluxes above the LCST in the oil/water separation.Simultaneously,the modified membrane acquired an oil retention rate exceeding 99%.After the oil/water separation, the fouled membrane could reach a water flux recovery of 89.7% via a simple temperature-change water cleaning performed at 35 ℃ and 25 ℃ alternately.The volume-phase transition of PNIPAAm was responsible for the easy-cleaning performance of the modified membrane surface.

关 键 词：聚(N-异丙基丙烯酰胺) 聚丙烯多孔膜 油水分离 膜污染 膜表面清洗 

分 类 号：TQ028.8[化学工程]