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Study on small molecular weight cut-off(MWCO) blend ultrafiltration membrane(III)——Post-treatment and comparison of chemical stability between PVDF UF membrane and PVDF/PVAc blend UF membrane

Qi Gong

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Abstract

The hydrophilic small molecular weight cut-off(MWCO) blend ultrafiltration(UF) membranes were prepared by phase inversion method with the raw materials of polyvinylidene fluoride(PVDF) and polyvinyl acetate(PVAc). In this paper, the comparision of chemical stability between PVDF UF membrane and PVDF/PVAc blend UF membrane was studied and the results indicated that, the chemical stability of PVDF/PVAc blend membranes was good. On the premise of same retention, the water flux of blend membrane, with weak solvent post-treatment, was significantly increased.

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What this paper is about

The hydrophilic small molecular weight cut-off(MWCO) blend ultrafiltration(UF) membranes were prepared by phase inversion method with the raw materials of polyvinylidene fluoride(PVDF) and polyvinyl acetate(PVAc). In this paper, the comparision of chemical stability between PVDF UF membrane and PVDF/PVAc blend UF membrane was studied and the results indicated that, the chemical stability of PVDF/PVAc blend membranes was good. On the premise of same retention, the water flux of blend membrane, with weak solvent post-treatment, was significantly increased.

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Available abstract

The hydrophilic small molecular weight cut-off(MWCO) blend ultrafiltration(UF) membranes were prepared by phase inversion method with the raw materials of polyvinylidene fluoride(PVDF) and polyvinyl acetate(PVAc). In this paper, the comparision of chemical stability between PVDF UF membrane and PVDF/PVAc blend UF membrane was studied and the results indicated that, the chemical stability of PVDF/PVAc blend membranes was good. On the premise of same retention, the water flux of blend membrane, with weak solvent post-treatment, was significantly increased.

Key concepts: Ultrafiltration (renal), Membrane, Phase inversion, Polyvinylidene fluoride, Polyvinyl acetate, Chemical engineering, Polymer chemistry, Polymer blend

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Study on small molecular weight cut-off(MWCO) blend ultrafiltration membrane(III)——Post-treatment and comparison of chemical stability between PVDF UF membrane and PVDF/PVAc blend UF membrane — Research Paper | ScholarLens