Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 159, Issue -, Pages 1197-1205Publisher
ELSEVIER
DOI: 10.1016/j.ijbiomac.2020.05.080
Keywords
N-2-hydroxylpropy1-3-trimethylammonium-O-carboxymethyl chitosan (HTCMCh); Carboxymethyl cellulose film; Physicochemical properties; Cytotoxicity; Antibacterial activity
Funding
- Program for Scientific Research Innovation Team in Colleges and Universities of Shandong Province, International cooperation Program [QLUTGJHZ2018002]
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences [ZZ20190117]
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A type of zwitterionic chitosan derivative, N-2-hydroxylpropyl-3-trimethylammonium-O-carboxymethyl chitosan (HTCMCh), was synthesized and introduced into carboxymethyl cellulose (CMC)-based films as a film strength enhancer and antibacterial agent. The influencing factors include degree of substitution (DS) and m(HTCMCh)/m(CMC). Their influences on mechanical properties, thermal stability, antibacterial activities, microstructures, transmittance, and wettability of the CMC-based films were studied. It was found that HTCMCh improves the tensile strength (by 9.0-130.9%), Young's modulus (47.8-351.6%), and elongation at break (90.8-280.8%) of CMC/HTCMCh films simultaneously, depending on the DS and mass content of HTCMCh. However, the HTCMCh shows little influence on microstructure and thermal stability of CMC/HTCMCh films. Satisfactorily, CMC/HTCMCh films show strong antibacterial activities against E. coli and S. aureus and are nontoxic to fibroblast HFF-1 cells. Pork packaging experiments demonstrated that CMC/HTCMCh(10%,0.58) film could significantly inhibit bacterial growth, indicating that the HTCMCh-doped CMC films could be used as food packaging materials. (C) 2020 Elsevier B.V. All rights reserved.
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