화학공학소재연구정보센터
Journal of Industrial and Engineering Chemistry, Vol.39, 181-187, July, 2016
Construction of antibacterial layer on polyvinylchloride three-channel hollow fiber membranes
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The inner surfaces of polyvinylchloride (PVC) three-channel hollow fiber membranes were successfully modified with poly(methacryloxylethyl benzyl dimethyl ammonium chloride) (PDMAE-BC) in a module scale via remote plasma-induced surface graft polymerization method. After grafting a PDMAE-BC layer, the PVC surface hydrophilicity was improved greatly due to the introduction of large amounts of oxygen and nitrogen containing polar groups onto polymer backbone. This hydrophilicity improvement directly leaded to a high pure water flux and a good antifouling property for the obtained PVC-PDMAE-BC membrane module. Meanwhile, the inner surface morphologies of modified PVC membranes changed slightly and the surface structures were maintained well. The tensile strength, though deceased slightly at the remote plasma-treated stage, showed no significant change during overall grafting process. The obtained PVC-PDMAE-BC membrane module exhibited highly effective and stable antibacterial activities against Escherichia coli. The antibacterial efficacy of PVC-PDMAE-BC membrane module with only 6 fibers can achieve about 96.3% and could be further enhanced by increasing the packing density. The antibacterial membrane module may have great potential applications in actual wastewater treatment and membrane bioreactor (MBR).
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