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.
出处
《南京工业大学学报（自然科学版）》
CAS
北大核心
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)
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
poly （ N-isopropylacrylamide ）
porous polypropylene membrane
oil/water separation
membrane fouling
membrane surface cleaning
