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Preparation of hydrophilic and large pore size polyvinyl chloride hollow fiber protein separation membrane

Authors： LONG Tingting, LU Xiaolong

Units： 1，State Key Laboratory of Separation Membrane and Membrane Process, School of Material Science and Engineering, Tiangong University, Tianjin 300387, China；2，State Key Laboratory of Membrane Materials and Membrane Applications，Tianjin Motimo Membrane Technology Co., Ltd., Tianjin 300457，China

KeyWords： Polyvinyl chloride; Hydrophilic modification; Non-solvent induced phase separation; Protein separation

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2024,44(3):97-105

Abstract：

Hydrophilic polyvinyl chloride (PVC) hollow fiber membranes were prepared by non-solvent-initiated phase separation (NIPS) using polyvinyl chloride (PVC) as the membrane material and the polyhydroxy-amino compound meglumine was added to the casting solution, and the amino-NH2 group of putrescine undergoes nucleophilic substitution reaction with the reactive site of C-Cl bond on the polyvinyl chloride (PVC) molecular chain. Investigations conducted into the relationship between meglumine concentrations and PVC membrane hydrophilicity demonstrated that the hydrophilicity and water flux of the PVC membranes rose with increasing meglumine concentrations. On this basis, the hydrophilic amphiphilic polymer Pluronic F127 was added as a pore-forming agent, and large pore size PVC hollow fiber membranes were prepared by the NIPS method. The effect of the addition of Pluronic F127 on the pore size of PVC membranes showed that when the addition of Pluronic F127 increased, the maximum pore size of PVC membrane began to increase and then decreased up to 0.46 μm, at which time the water flux was 6430 L/m2?h?MPa, the BSA permeability and the cell rejection was 95% and 100% respectively, and the flux recovery of hydrophilic large pore size poly(vinyl chloride) hollow fiber membranes was increased compared to the original membranes.

Funds：

天津市高等学校新型膜材料及膜分离技术创新团队(No. TD13-5044)

AuthorIntro：

龙婷婷(1995-)，女，贵州黔东南人，硕士研究生，研究方向为蛋白质分离膜制备与应用

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