Abstract
Research on nanocomposite film from natural polymers such as cellulose and chitosan is of great importance to promote the development and highly efficient utilization of green and renewable bioresources. In this study, enzymatic pretreatment cellulose nanofibril (ETCNF) derived from licorice residues was prepared, and further processed into nanocomposite film with addition of chitosan nanofibril (CHN). This study focused on the effects of CHN dosage on the main properties of resultant nanocomposite film in terms of crystallinity, thermal stability, light transmittance, hydrophobicity, mechanical properties, and antibacterial activity. The results showed that ETCNF/CHN nanocomposite film exhibited good hydrophobicity especially at higher dosage of CHN, good light transmittance and mechanical properties (tensile strain can reach 39.6 MPa for ETCNF/CHN-10.0%). The as-prepared ETCNF/CHN nanocomposite film also showed good antibacterial activity against Escherichia coli. It was expected that the ETCNF/CHN nanocomposite film would help to realize transformation and high value-added utilization of these biomass residues.
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