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Low-biofouling membranes prepared by liquid-induced phase separation of the PVDF/polystyrene-b-poly (ethylene glycol) methacrylate blend

Venault, Antoine and Liu, Yi-Hung and Wu, Jia-Ru and Yang, Hui-Shan and Chang, Yung and Lai, Juin-Yih and Aimar, Philippe Low-biofouling membranes prepared by liquid-induced phase separation of the PVDF/polystyrene-b-poly (ethylene glycol) methacrylate blend. (2014) Journal of Membrane Science, 450. 340-350. ISSN 0376-7388

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Official URL: https://doi.org/10.1016/j.memsci.2013.09.004

Abstract

In the present work, the focus is laid on the formation, and low-biofouling properties of polyvinylidene fluoride (PVDF) membranes modified using an amphiphilic copolymer additive: polystyrene-b-poly (ethylene glycol) methacrylate (PS-b-PEGMA). PVDF was blended with PS-b-PEGMA and membranes were prepared by liquid-induced phase separation. The additive played a significant role on membrane formation, slightly decreasing surface porosity, reducing the shrinkage during phase separation, and increasing both the size and porosity of macrovoids. Owing to its numerous hydrophilic moieties, the copolymer was believed to promote solvent and nonsolvent exchanges during phase inversion. In addition, it significantly enhanced surface hydrophilicity and matrix hydration capability. Indeed, water was easily trapped by the PEGylated chains spread onto the surface and within the matrix, and then stored in the larger macrovoids. It led to an important reduction of protein adsorption, including bovine serum albumin (65%) and lysozyme (89%). Bacterial attachment tests revealed that adhesion of Escherichia coli and Staphylococcus epidermidis was almost totally prevented (over 99% reduction of attachment), which demonstrates the excellent efficiency of PS-b-PEGMA copolymer to provide PVDF membranes with low-biofouling properties.

Item Type:Article
HAL Id:hal-01894125
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 - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Chung Yuan Christian University - CYCU (TAIWAN)
Laboratory name:
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Deposited By: Loetitia MOYA
Deposited On:12 Oct 2018 08:24

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