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Effects of evaporation time, temperature of evaporation medium and casting solution on properties and structure of poly-(vinyledene fluoride)/polyethersulfone blend membrane  
Effects of evaporation time, temperature of evaporation medium and casting solution on properties and structure of poly-(vinyledene fluoride)/polyethersulfone blend membrane
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关键词: poly  (vinylidene  fluoride)  polyethersulfone  blend  membrane  evaporation  
casting  solution  
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简介:
Theeffectsofsomemembranepreparationconditionsonthepropertiesandstructureofpoly(vinylidenefluoride)/polyethersulfoneblendmembraneswerestudied.Poly(vinylidenefluoride)(PVDF)andpolyethersulfone(PES)wereusedasbasepolymers.Dimethyiacetamide(DMAc)wasselectedasthesolventandpolyvinylpyrrolidone(PVP)wasusedaspore-formingadditive.Thepreparationvariablesinthisworkwereevaporationtime,temperatureofevaporationmediumandcastingsolutiontemperature.Theflat-sheetmembranespreparedbyphaseinversionwerecharacterizedbyscanningelectronmicroscopy(SEM).Membraneperformancewasevaluatedbypurewaterfluxandretentiontobovineserumalbumin(BSA).ThepurewaterfluxofblendmembranesdecreasesandtheretentiontoBSAincreasesastheevaporationtimeextendedandthetemperatureofevaporationmediumincreased.Theretentiondecreaseswhentheevaporationtimeexceeds6minandthetemperatureofevaporationmidumsurpasses60℃.Thepurewaterfluxofblendmembranesincreasesandtheretentionisalmostunchangedwithcastingsolutiontemperatureincreasing.
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