Zwitterionic Nanocellulose-Based Membranes for Organic Dye Removal
authors Vilela, C; Moreirinha, C; Almeida, A; Silvestre, AJD; Freire, CSR
nationality International
author keywords bacterial nanocellulose; poly(2-methacryloyloxyethyl phosphorylcholine); zwitterionic nanocomposites; dye removal; water remediation; antibacterial activity
abstract The development of efficient and environmentally-friendly nanomaterials to remove contaminants and pollutants (including harmful organic dyes) ravaging water sources is of major importance. Herein, zwitterionic nanocomposite membranes consisting of cross-linked poly(2-methacryloyloxyethyl phosphorylcholine) (PMPC) and bacterial nanocellulose (BNC) were prepared and tested as tools for water remediation. These nanocomposite membranes fabricated via the one-pot polymerization of the zwitterionic monomer, 2-methacryloyloxyethyl phosphorylcholine, within the BNC three-dimensional porous network, exhibit thermal stability up to 250 degrees C, good mechanical performance (Young's modulus 430 MPa) and high water-uptake capacity (627%-912%) in different pH media. Moreover, these zwitterionic membranes reduced the bacterial concentration of both gram-positive (Staphylococcus aureus) and gram-negative (Escherichia coli) pathogenic bacteria with maxima of 4.3- and 1.8-log CFU reduction, respectively, which might be a major advantage in reducing or avoiding bacterial growth in contaminated water. The removal of two water-soluble model dyes, namely methylene blue (MB, cationic) and methyl orange (MO, anionic), from water was also assessed and the results demonstrated that both dyes were successfully removed under the studied conditions, reaching a maximum of ionic dye adsorption of ca. 4.4-4.5 mg g(-1). This combination of properties provides these PMPC/BNC nanocomposites with potential for application as antibacterial bio-based adsorbent membranes for water remediation of anionic and cationic dyes.
publisher MDPI
issn 1996-1944
year published 2019
volume 12
issue 9
digital object identifier (doi) 10.3390/ma12091404
web of science category Materials Science, Multidisciplinary
subject category Materials Science
unique article identifier WOS:000469757500045
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journal analysis (jcr 2019):
journal impact factor 3.057
5 year journal impact factor 3.424
category normalized journal impact factor percentile 58.121
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