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
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(Document in English)
PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader 18MB |
Official URL: https://doi.org/10.1016/j.memsci.2016.03.017
Abstract
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 |
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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: | |
Statistics: | download |
Deposited On: | 25 Oct 2018 08:06 |
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