Journal
BIOMACROMOLECULES
Volume 22, Issue 11, Pages 4501-4509Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.biomac.1c00725
Keywords
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Funding
- National Natural Science Foundation of China [31870563]
- Innovation Pilot Project of Integration of Science, Education and Industry of Shandong Province [2020KJC-ZD06]
- Foundation of State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences [ZZ20200103]
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By using biografting technique, a multifunctional chitosan copolymer, Lac/LG-CTS, with enhanced antioxidant property, hydrophobicity, and moisture barrier property, was successfully prepared. Although the swelling capacity and acid solubility of the copolymer film decreased significantly, the tensile strength and elongation were slightly weakened.
Biografting is a promising and ecofriendly approach to meet various application requirements of products. Herein, a popular green enzyme, lactase, was adopted to graft a hydrophobic phenolic compound (lauryl gallate, LG) onto chitosan (CTS). The resultant chitosan derivate (Lac/LG-CTS) was systematically analyzed by Fourier transform infrared (FTIR), grafting efficiency, scanning probe microscopy (SPM), and X-ray diffraction (XRD). This grafting technique produced a multifunctional chitosan copolymer with remarkably enhanced antioxidant property, hydrophobicity, and moisture barrier property. Furthermore, the swelling capacity and acid solubility of the copolymer film decreased significantly, although the tensile strength and elongation were slightly weakened as compared to those of native chitosan. These results suggest that the Lac/LG-CTS holds great potential as a food-packaging material, preservative agent, or edible coating material.
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