聚乙烯醇/聚乙烯吡咯烷酮共混膜的制备和性能  

Poly (Vinyl Alcohol)/Polyvinylpyrrolidone Blending Membranes:Preparation,Characterization and Dehydration of Ethyl Acetate/Ethanol/Water Azeotrope by Pervaporation

作　　者：张秀华[1] 朱爱梅[1] 张秋根[1] 刘庆林[1] 

机构地区：[1]国家醇醚酯化工清洁生产工程实验室,厦门大学化学化工学院化学工程与生物工程系,福建厦门361005

出　　处：《高分子材料科学与工程》2010年第9期146-150,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(20976145);福建省自然科学基金资助项目(2009J01040)

摘　　要：制备了聚乙烯醇(PVA)、PVA/聚乙烯吡咯烷酮(PVP)与戊二醛交联的PVA/PVP膜用于渗透蒸发对乙酸乙酯/乙醇/水三元共沸体系脱水。采用傅立叶变换红外光谱(FT-IR),X射线散射(XRD)和扫描电镜(SEM)等对膜的物理化学结构及形貌进行了表征。考察了PVP含量、交联度对共混膜结构和亲水性的影响。考察了PVP含量、交联度和温度对PVA均质膜的分离性能和溶胀行为的影响。结果表明,交联的PVA/PVP共混膜对乙酸乙酯/乙醇/水有着优异的分离性能。Homogeneous membranes were prepared by blending poly （vinyl alcohol） （PVA） with polyvinylpyrrolidone （PVP） and then cross-linked with glutaraldehyde （GA）. The dehydration of ethyl acetate/ethanol/water azeotrope by pervaporation was proposed with the aims of low energy consumption and high separation factor. The membranes were characterized by Fourier transform infrared spectroscopy （FT-IR）,wide-angle X-ray diffraction （XRD） and scanning electron microscopy （SEM）. The effects of the PVP content and cross-linking agent volume on the structure of PVA membranes were studied. The effects of the PVP content,cross-linking agent volume and temperature on pervaporation performance and the swelling of PVA membranes were studied. The results show that the cross-linked PVA/PVP blending membranes have high hydrophilicity and high separation performance for ethyl acetate/ethanol/water mixtures.

关 键 词：渗透蒸发 乙酸乙酯 交联 共混 

分 类 号：TB383[一般工业技术—材料科学与工程]