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Antibacterial membranes based on chitosan and quaternary ammonium salts modified nanocrystalline cellulose
Author(s) -
Liu Ying,
Li Mei,
Qiao Mingyu,
Ren Xuehong,
Huang TungShi,
BuschleDiller Gisela
Publication year - 2017
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.4032
Subject(s) - materials science , ultimate tensile strength , ammonium chloride , cellulose , chitosan , ammonium , nanocomposite , nuclear chemistry , antibacterial activity , nanocrystalline material , composite number , chloride , chemical engineering , organic chemistry , chemistry , composite material , nanotechnology , bacteria , biology , metallurgy , genetics , engineering
Etherification of nanocrystalline cellulose (NCC) with three kinds of quaternary ammonium salts epoxypropyltrimethylammonium chloride, N , N ‐dimethyl‐ N ‐dodecyl‐ N ‐(1,2‐epoxypropyl) ammonium chloride (DMDEPAC), and N , N ‐dimethyl‐ N ‐octadecyl‐ N ‐(1,2‐epoxypropyl) ammonium chloride (DMOEPAC) was successfully performed via a nucleophilic addition reaction. The synthesized DMDEPAC and DMOEPAC were characterized by nuclear magnetic resonance. The modified NCC particles, NCC epoxypropyltrimethylammonium chloride, NCC‐DMDEPAC, and NCC‐DMOEPAC, were characterized by energy dispersive spectrometer. Nanocomposite films based on chitosan (CS) containing quaternary ammonium salts modified NCC were prepared with nanoparticle loadings of 5.0, 7.5, and 10.0%, respectively. The effect of nanoparticle content on the tensile strength of composite films was studied. The results indicated that the films with 5.0% nanoparticle loading exhibited the biggest increase in tensile strength. Surface morphology, smoothness, and antibacterial properties of composite films containing 5% modified NCC were also studied. CS/NCC‐DMDEPAC‐5.0 and CS/NCC‐DMOEPAC‐5.0 displayed excellent biocidal abilities against both Gram‐positive Staphylococcus aureus (ATCC 6538) and Gram‐negative Escherichia coli O157:H7 (ATCC 43895). The bio‐based nanocomposite films with increased mechanical strength and excellent antibacterial properties show great potential as food packaging materials. Copyright © 2017 John Wiley & Sons, Ltd.