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Effective immobilization of silver nanoparticles on regenerated cellulose-chitosan composite membrane and its antibacterial activity

Abstract

An antibacterial chitosan-cellulose composite membrane containing silver nanoparticles (AgNPs) was fabricated by coagulating a cellulose solution in a chitosan solution, followed by the in situ synthesis of AgNPs on the produced membrane. By adjusting the concentration of chitosan (0 – 2.5 %, w/v) in acetic acid coagulating solution, various cellulose-chitosan membranes with different chitosan contents were produced, which then served as substrates for the in situ synthesis and immobilization of AgNPs via microwave-assisted approach. The amount of AgNPs deposited on the membrane was measured and found increasing with an increasing of chitosan content on the membrane. The electron micrographs of the membranes revealed that the entanglement of chitosan on the membranes structure, whereas the AgNPs were deposited on the membrane surfaces. Additionally, the surface roughness of the membrane increased as the result of the increase of chitosan and AgNPs on the membrane surfaces. Consequently, the membranes exhibited an improved antibacterial activity against Staphylococcus aureus and Escherichia coli as the AgNPs content increases. In conclusion, this study demonstrated a successful green approach of preparing a nanocomposite membrane of cellulose-chitosan-AgNPs with strong antibacterial activities.

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Publication details

The article was received on 26 Jan 2017, accepted on 09 May 2017 and first published on 10 May 2017


Article type: Paper
DOI: 10.1039/C7NJ00319F
Citation: New J. Chem., 2017, Accepted Manuscript
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    Effective immobilization of silver nanoparticles on regenerated cellulose-chitosan composite membrane and its antibacterial activity

    S. W. Chook, C. H. Chia, S. Zakaria, H. M. Neoh and R. Jamal, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ00319F

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