聚偏氟乙烯微滤膜亲水化处理  

CHEMICAL MODIFICATION FOR A HYDROPHILIC PVDF MF MEMBRANE

作　　者：邵平海[1] 孙国庆[1] 

机构地区：[1]中科院大连化物所

出　　处：《水处理技术》1995年第1期26-29,共4页Technology of Water Treatment

摘　　要：本文以ＫＭｎＯ＿４为氧化剂，ＫＯＨ为强碱，在８０℃下对平板式聚偏氟乙烯（ＰＶＤＦ）膜进行脱ＨＦ处理，在酸性环境下经亲核反应后用０．５％的聚乙烯吡咯烷酮（ＰＶＰ）水溶液处理。干燥后获得了亲水性的ＰＶＤＦ膜。实验考察了ＫＯＨ浓度及涂层时间对ＰＶＤＦ膜亲水性的影响，改性后的膜经泡点试验表明，其孔结构未发生变化。高温水浸泡及水通量试验表明，经过上述工艺处理后的ＰＶＤＦ膜，其亲水性良好。When KMnO4 and KOH are used respectively as oxidating agent and stronge base to facilitate the HF-elimination from PVDF chain,and 0.5% PVP aqueous solution as coating media,the hydrophilic PVDF MF membrane was achieved.By observing the effects of KMno4 and KOH concentration,and that of coating time upon membrane's potential wettability,the HF-elimination reaction was thought as the limitting step to membrane's wettability.The modified membrane was then tested with respect to bubble point, water flux and coating layer resistance to hot water at 90℃.Results indicated that both membrane surface and membrane pore wall were effectively modified,and membrane coating layer is of enough stability.

关 键 词：分离膜 聚偏氟乙烯 微滤膜 亲水性 涂层 

分 类 号：TQ028.8[化学工程]