聚乙烯醇缩糠醛纳滤膜的制备  

STUDY OF PREPARATION OF PVFu NANOFILTRATION MEMBRANE

作　　者：翟丁[1] 周勇[1] 张余[1] 高从堦[1] 

机构地区：[1]杭州水处理技术研究开发中心有限公司,浙江杭州310012

出　　处：《水处理技术》2011年第2期23-26,共4页Technology of Water Treatment

基　　金：国家重点基础研究发展规划(973)项目(2009CB623402);国家高科技研究发展计划(863)项目(2007AA030302);国家高科技研究发展计划(863)项目(2009AA032201);钱江人才计划(2009R10067)

摘　　要：以聚乙烯醇(PVA)和糠醛(Fu)为主要原料,采用溶液涂敷法制备了聚乙烯醇缩糠醛(PVFu)复合纳滤膜,考查了聚乙烯醇的浓度、交联剂的用量及糠醛含量等对膜分离性能的影响。结果表明,在25℃,75%相对湿度条件下,通过质量分数5%的聚乙烯醇溶液与1%的糠醛缩醛化交联反应所制得的纳滤膜在1.0 MPa操作压力下对PEG600的截留率达到98.30%,水通量为11.3 L.m-2.h-1。随着操作压力的增加,通量呈线性增加,截留率也相应上升;该膜有较好的耐氯性;用红外光谱仪表征了复合膜的分子结构。用原子力显微镜(AFM)观察了复合膜的表面形态,用X射线衍射仪研究了聚乙烯醇缩糠醛固化后的结晶状态,并用动态活性氯测试法测试膜的耐氯性。The composite nanofiltration is prepared by solution coating hydrophilic polyvinyl alcohol and furfural on the base membrane. The effects oft he concentration of PVA, the quantity of crosslinking agents and the contents of furfural,etc.In the condition of 25℃ and 75% relative humidity,the uanofiltratiou membrane prepared by acetalation crosslinkiug reaction of 5 % content of PVA and 1% furfural showed that the water flux was 11.3 L.m-2.h-1 , andthePEG600 rejection was 98.30%under the operating pressure of 1.0 MPa. with the increase of opemting pressure, the fulx enlarged and the rejection increased. The surface structure of the membrane was proved by infrared spectroscopy （IR）, Atomic force microscopy displayed that the surfaces of the membrane appeared the apparent structure of peaks and valleys.the crystallization state was studied by Energy dispersive X-ray spectrometry （EDS）,and the chlorine tolerance of membranes was tested by dynamic active chlorine.

关 键 词：聚乙烯缩糠醛 纳滤膜 溶液涂敷法 

分 类 号：TQ028.8[化学工程]