文章编号:1009−444X(2022)04−0341−06SPTA−PVA/CDA−GO/PVDF复合膜的制备与表征徐悦,曾正,袁海宽,陆杰(上海工程技术大学化学化工学院,上海201620)摘要:用1,4−环己二胺(CDA)修饰氧化石墨烯(GO),利用4−磺基邻苯二甲酸(SPTA)对聚乙烯醇(PVA)进行交联,以亲水化的聚偏氟乙烯(PVDF)超滤膜为底膜,通过真空过滤与滴涂,制备SPTA−PVA/CDA−GO/PVDF复合膜.采用全反射傅里叶变换红外光谱(ATR−FTIR)、扫描电子显微镜(SEM)和接触角测试对复合膜表征,并测试复合膜的渗透汽化脱盐性能.结果表明,CDA修饰扩大了GO纳米片的层间距,增加了CDA−GO层的透水性;交联PVA层提高了复合膜的表面亲水性和稳定性,增强了复合膜吸水性和水传输性能.复合膜在70℃对质量分数为3.5%的氯化钠(NaCl)水溶液获得15.6kg/(m2•h)的水通量和99.99%的脱盐率.关键词:渗透汽化;脱盐;氧化石墨烯;聚乙烯醇中图分类号:TQ028.8文献标志码:APreparationandcharacterizationofSPTA−PVA/CDA−GO/PVDFcompositemembraneXUYue,ZENGZheng,YUANHaikuan,LUJie(SchoolofChemistryandChemicalEngineering,ShanghaiUniversityofEngineeringScience,Shanghai201620,China)Abstract:Grapheneoxide(GO)wasmodifiedby1,4−cyclohexanediamine(CDA),andpolyvinylalcohol(PVA)wascrosslinkedby4−sulfophthalicacid(SPTA).Hydrophilizedpolyvinylidenefluoride(PVDF)ultrafiltrationmembraneassupport,SPTA−PVA/CDA−GO/PVDFcompositemembranewaspreparedthroughvacuumfiltrationanddropcoating.ThecompositemembranewascharacterizedbyATR−FTIR,SEMandcontactangle,andthepervaporationdesalinationperformanceofcompositemembranewastested.TheresultsshowthatthemodificationofCDAextendedtheinterlayerspacingofGOnanosheets,thusimprovingthewaterpermeabilityofCDA−GOlayer,andthecrosslinkedPVAlayerenhancedthesurfacehydrophilicityandstabilityofcompositemembrane,consequently,improvedthewaterabsorptionandwatertransportpropertiesofcompositemembrane.Thecompositemembraneobtainedafluxof15.6kg/(m2•h)andarejectionof99.99%whentreatingwithconcentrationof3.5%NaClsolutionat70℃.Keywords:pervaporation;desalination;grapheneoxide;polyvinylalcohol随着全球人口的不断增长,淡水资源的匮乏已经成为一个热门的话题,而将海水进行淡化...