Fractal Medium Model for Diffusion in Dense Polymer Membranes

ＦｒａｃｔａｌＭｅｄｉｕｍＭｏｄｅｌｆｏｒＤｉｆｕｓｉｏｎｉｎＤｅｎｓｅＰｏｌｙｍｅｒＭｅｍｂｒａｎｅｓ＊ＳｈａｎｇＴｉａｎｇａｎｇ（尚天刚），ＣｈｅｎＣｕｉｘｉａｎ（陈翠仙），ＬｉＬｉｎ（李琳），ＪｉａｎｇＷｅｉｊｕｎ（蒋维钧）Ｄｅｐａｒｔｍｅｎｔ...     

Crosslinking of PVA Pervaporation Membrane by Maleic Acid

Introduction　　Therehasbeenmuchprogressintheresearchanddevelopmentofmembranesandtheirusesinpervaporationprocessesfortheseparationofvariousorganicliquidmixturesandforthedehydrationoforganicmixtures.Currently,muchattentionisstillbeingpaidtopervaporation,because,asanenergysavingseparationmethod,itmightpartlyreplacetraditionaldistillationofaqueousalcoholsolutionsandazeotropicmixtures[14].Inaddition,ithastheadvantageofsimplifyingtheprocessdesignandavoidingthepollutionofproductscausedbythesubstance…     

StudyontheDehydrationofOrganicSolventsbyPervaporationandtheMasTransferMechanismofPervaporation

ＳｔｕｄｙｏｎｔｈｅＤｅｈｙｄｒａｔｉｏｎｏｆＯｒｇａｎｉｃＳｏｌｖｅｎｔｓｂｙＰｅｒｖａｐｏｒａｔｉｏｎａｎｄｔｈｅＭａｓＴｒａｎｓｆｅｒＭｅｃｈａｎｉｓｍｏｆＰｅｒｖａｐｏｒａｔｉｏｎ＊ＹｕＬｉｘｉｎ（余立新），ＣｈｅｎＣｕｉｘｉａｎ（陈翠仙），...     

PVA-MA 酯化交联膜的制备及性能表征

介绍了聚乙烯醇（ＰＶＡ）与马来酸（ＭＡ）酯化交联膜的制备及性能表征。ＰＶＡ与ＭＡ在浓硫酸催化下，高温脱水酯化交联。利用红外光谱（ＩＲ）、拉伸强度分别表征了交联膜的化学结构及力学性能。在沸水中测定了ＰＶＡ交联膜的耐水性，将ＰＶＡ与聚丙烯腈（ＰＡＮ）制成ＰＶＡ－ＰＡＮ交联复合膜用于渗透汽化法分离乙醇—水混合物。研究了交联度与复合膜渗透汽化特性之间的关系。