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Fully-biobased zwitterionic membranes with superior antifouling and antibacterial properties prepared via surface-initiated free-radical polymerization of poly (cysteine methacrylate)

Abstract

This work proposes a strategy to prepare membranes that combine the network characteristics of micro/nanocellulose with zwitterionic poly (cysteine methacrylate) (PCysMA) to develop fully bio-based membranes with antifouling properties. A functional membrane template was obtained first by fabricating a water stable network from cellulose micro- and nanofibers and subsequently surface grafting it with PCysMA. The surface characteristics of the membranes were studied, together with static adsorption of bovine serum albumin (BSA) and S. aureus for evaluating the antifouling properties of the modified membranes. Experimental data revealed a homogenous modification that resulted in excellent antifouling properties with a reduction of 85% in biofilm formation and enhanced antimicrobial activity. Moreover, we introduced a novel method to determine the pore size of membranes in the wet-state and to assess the antifouling performance in situ by means of Synchrotron-based SAXS. This allowed us to clearly observe in real-time the decrease in pore size upon adsorption of BSA during filtration, and how this phenomenon is strongly suppressed by grafting of PCysMA.

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Publication details

The article was received on 25 Jun 2018, accepted on 30 Jul 2018 and first published on 30 Jul 2018


Article type: Paper
DOI: 10.1039/C8TA06095A
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
  • Open access: Creative Commons BY-NC license
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    Fully-biobased zwitterionic membranes with superior antifouling and antibacterial properties prepared via surface-initiated free-radical polymerization of poly (cysteine methacrylate)

    L. Valencia, S. Kumar, B. Jalvo, A. Mautner, G. Salazar-Alvarez and A. Mathew, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA06095A

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