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  • Title: Plasticized hemicelluloses/chitosan-based edible films reinforced by cellulose nanofiber with enhanced mechanical properties.
    Author: Xu J, Xia R, Zheng L, Yuan T, Sun R.
    Journal: Carbohydr Polym; 2019 Nov 15; 224():115164. PubMed ID: 31472866.
    Abstract:
    In this work, the properties of the plasticized hemicelluloses/chitosan-based edible films reinforced by cellulose nanofiber (CNF) have been evaluated. Results showed that the tensile strength (TS) of the film increased by 2.3 times with adding 5% CNF. As compared with unplasticized film, the films containing 10-40% plasticizers (glycerol, xylitol, sorbitol) showed slightly higher water vapor permeability, oxygen permeability, transparency, solubility, and lower contact angle. Among the three types of plasticized films, glycerol-plasticized films exhibited the highest tensile strain at break (TB, 7.80-18.53%), while the sorbitol-plasticized films exhibited the highest TS (23.14-48.96 MPa). However, there were no substantial differences in the three types of plasticized films except TS and TB. Overall, the films containing 20-30% glycerol with high TS (31.02-38.56 MPa) and TB (10.07-15.98%) were suitable for food-packaging applications where high mechanical strength and flexibility are required.
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