Uncovering the effect of poly(ethylene-co-vinyl alcohol)molecular weight and vinyl alcohol content on morphology,antifouling,and permeation properties of polysulfone ultrafiltration membrane:thermodynamic and formation hydrodynamic behavior  

作　　者：Sania Kadanyo Christine N.Matindi Derrick S.Dlamini Nozipho N.Gumbi Yunxia Hu Zhenyu Cui Jianxin Li 

机构地区：[1]State Key Laboratory of Separation Membranes and Membrane Processes,National Center for International Joint Research on Membrane Science and Technology,Tiangong University,Tianjin 300387,China [2]School of Materials Science and Engineering,Tiangong University,Tianjin 300387,China [3]Institute for Nanotechnology and Water Sustainability,College of Science,Engineering and Technology,University of South Africa Science Campus,Florida 1710,South Africa [4]University of California,Los Angeles(UCLA),Department of Civil&Environmental Engineering,UCLA California NanoSystems Institute and UCLA Institute of the Environment&Sustainability,Los Angeles,CA 90095,USA

出　　处：《Frontiers of Chemical Science and Engineering》2023年第10期1484-1502,共19页化学科学与工程前沿（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(Grant Nos.22278318 and 21878230).

摘　　要：Various hydrophilic poly(ethylene-co-vinyl alcohol)(EVOH)were used herein to precisely control the structure and hydrodynamic properties of polysulfone(PSF)membranes.Particularly,to prepare pristine PSF and PSF/EVOH blends with increasing vinyl alcohol(VOH:73%,68%,56%),the non-solvent-induced phase separation(NIPS)technique was used.Polyethylene glycol was used as a compatibilizer and as a porogen in N,Ndimethylacetamide.Rheological and ultrasonic separation kinetic measurements were also carried out to develop an ultrafiltration membrane mechanism.The extracted membrane properties and filtration capabilities were systematically compared to the proposed mechanism.Accordingly,the addition of EVOH led to an increase in the rheology of the dopes.The resulting membranes exhibited a microporous structure,while the finger-like structures became more evident with increasing VOH content.The PSF/EVOH behavior was changed from immediate to delayed segregation due to a change in the hydrodynamic kinetics.Interestingly,the PSF/EVOH32 membranes showed high hydrophilicity and achieved a pure water permeability of 264 L·m^(–2)·h^(–1)·bar^(–1),which was higher than that of pure PSF membranes(171 L·m^(–2)·h^(–1)·bar^(–1)).In addition,PSF/EVOH32 rejected bovine serum albumin at a high rate(>90%)and achieved a significant restoration of permeability.Finally,from the thermodynamic and hydrodynamic results,valuable insights into the selection of hydrophilic copolymers were provided to tailor the membrane structure while improving both the permeability and antifouling performance.

关 键 词：POLYSULFONE blend modification ultrafiltration membrane formation hydrodynamics poly(ethyleneco-vinyl alcohol)copolymer 

分 类 号：TQ3[化学工程]