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Design of PVDF/PEGMA- b -PS- b -PEGMA membranes by VIPS for improved biofouling mitigation

Carretier, Séverine and Chen, Li-An and Venault, Antoine and Yang, Zhong-Ru and Aimar, Pierre and Chang, Yung Design of PVDF/PEGMA- b -PS- b -PEGMA membranes by VIPS for improved biofouling mitigation. (2016) Journal of Membrane Science, 510. 355-369. ISSN 0376-7388

(Document in English)

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Official URL: https://doi.org/10.1016/j.memsci.2016.03.017


Literature on the design of efficient nonfouling membranes by in-situ modification is poor, which can be explained by the difficulty to control membrane formation mechanisms when a third material is added to the casting solution, or by the lack of stability of matrix polymers with surface-modifiers. We present polyvinylidene fluoride membranes formed by vapor-induced phase separation and modified with a tri-block copolymer of poly(styrene) and poly(ethylene glycol) methacrylate moieties (PEGMA124-b-PS54-b-PEGMA124). After characterizing the copolymer, we move onto membrane formation mechanisms. Membrane formation is well controlled and leads to structure close to bi-continuous. Considering the formulation chosen, PVDF/PEGMA124-b-PS54-b-PEGMA124 solutions are less viscous and more hydrophilic than virgin PVDF solutions. Both effects promote non-solvent transfer, thus decreasing the chances for crystallization. Hydrophilic capability of membranes is increased from about 59 mg/cm3 to 650 mg/cm3, leading to a severe drop of non-specific protein adsorption, up to 85–90%, also depending on its nature. Biofouling at the micro-scale by modified Escherichia coli and Streptococcus mutans is almost totally inhibited. Finally, biofouling is importantly reduced in dynamic conditions, as measured from the water flux recovery ratio of 69.4%, after 3 water-BSA filtration cycles, much higher than with a commercial hydrophilic PVDF membrane (47.3%). These membranes hold promise as novel materials for water-treatment or blood filtration.

Item Type:Article
HAL Id:hal-01907330
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Chung Yuan Christian University - CYCU (TAIWAN)
Laboratory name:
Deposited On:25 Oct 2018 08:06

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