A Biofouling Resistant Zwitterionic Polysulfone Membrane Prepared by a Dual-Bath Procedure

This study introduces a zwitterionic material to modify polysulfone (PSf) membranes formed by a dual bath procedure, in view of reducing their fouling propensity. The zwitterionic copolymer, derived from a random polymer of styrene and 4-vinylpyrridine and referred to as zP(S- -4VP), was incorporate...

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Bibliographic Details
Published in:Membranes (Basel) 2022-01, Vol.12 (1), p.69
Main Authors: Maggay, Irish Valerie B, Aini, Hana Nur, Lagman, Mary Madelaine G, Tang, Shuo-Hsi, Aquino, Ruth R, Chang, Yung, Venault, Antoine
Format: Article
Language:English
Subjects:
Adsorption
antifouling membrane
Biofouling
Biomedical materials
blending
Blood cells
Cell adhesion
Chemicals
Copolymers
Hemodialysis
Membranes
Permeability
Polymers
Polysulfone
polysulfone membrane
Polysulfone resins
Pore formation
Proteins
Solvents
Styrene
zwitterionic modification
Zwitterions
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Summary:This study introduces a zwitterionic material to modify polysulfone (PSf) membranes formed by a dual bath procedure, in view of reducing their fouling propensity. The zwitterionic copolymer, derived from a random polymer of styrene and 4-vinylpyrridine and referred to as zP(S- -4VP), was incorporated to the PSf solution without any supplementary pore-forming additive to study the effect of the sole copolymer on membrane-structuring, chemical, and arising properties. XPS and mapping FT-IR provided evidence of the modification. Macrovoids appeared and then disappeared as the copolymer content increased in the range 1-4 wt%. The copolymer has hydrophilic units and its addition increases the casting solution viscosity. Both effects play an opposite role on transfers, and so on the growth of macrovoids. Biofouling tests demonstrated the efficiency of the copolymer to mitigate biofouling with a reduction in bacterial and blood cell attachment by more than 85%. Filtration tests revealed that the permeability increased by a twofold factor, the flux recovery ratio was augmented from 40% to 63% after water/BSA cycles, and irreversible fouling was reduced by 1/3. Although improvements are needed, these zwitterionic PSf membranes could be used in biomedical applications where resistance to biofouling by cells is a requirement.
ISSN:2077-0375
2077-0375
DOI:10.3390/membranes12010069