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(100.58) 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.
|Number of pages||9|
|Journal||International Journal of Biological Macromolecules|
|Publication status||Published - 15 Sep 2020|
|MoE publication type||A1 Journal article-refereed|
- Chemical Engineering
- Physicochemical properties
- Antibacterial activity