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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

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Frontiers of Chemical Science and Engineering 2023年第10期17卷 1484-1502页

作者： Sania Kadanyo Christine n.Matindi Derrick S.Dlamini nozipho n.gumbi Yunxia Hu Zhenyu Cui Jianxin Li State Key Laboratory of Separation Membranes and Membrane Processes National Center for International Joint Research on Membrane Science and TechnologyTiangong UniversityTianjin 300387China School of Materials Science and Engineering Tiangong UniversityTianjin 300387China Institute for nanotechnology and Water Sustainability College of ScienceEngineering and TechnologyUniversity of South Africa Science CampusFlorida 1710South Africa University of California Los Angeles(UCLA)Department of Civil&Environmental EngineeringUCLA California NanoSystems Institute and UCLA Institute of the Environment&SustainabilityLos AngelesCA 90095USA

Various hydrophilic poly(ethylene-co-vinyl alcohol)(EVOH)were used herein to precisely control the structure and hydrodynamic properties of polysulfone(PSF)***,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 *** glycol was used as a compatibilizer and as a porogen in n,*** and ultrasonic separation kinetic measurements were also carried out to develop an ultrafiltration membrane *** extracted membrane properties and filtration capabilities were systematically compared to the proposed ***,the addition of EVOH led to an increase in the rheology of the *** resulting membranes exhibited a microporous structure,while the finger-like structures became more evident with increasing VOH *** PSF/EVOH behavior was changed from immediate to delayed segregation due to a change in the hydrodynamic ***,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 ***,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

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