Preparation and Properties of Rice Bran Protein-chitosan-&#x003b5;-polylysine Nanoparticle Composite Film

WANG Lishuang; ZHI Xiao; SUN Jia; WANG Na

doi:10.19554/j.cnki.1001-3563.2025.17.015

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Packaging Engineering ›› 2025, Vol. 46 ›› Issue (17) : 133-143. DOI: 10.19554/j.cnki.1001-3563.2025.17.015

Advanced Materials

Preparation and Properties of Rice Bran Protein-chitosan-ε-polylysine Nanoparticle Composite Film

WANG Lishuang¹, ZHI Xiao², SUN Jia¹, WANG Na^2,*

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Abstract

The work aims to improve the performance and application value of biofilms, and develop a rice bran protein composite film (RBP NPs) with rice bran protein chitosan-ε-polylysine nanoparticles as an improvement factor. Rice bran protein-chitosan-ε-polylysine nanoparticles (RBP-NPs) were prepared by the composite thermal aggregation self-assembly method. A composite film was constructed by the casting film-forming process. The film structure was characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and differential scanning calorimetry (DSC). The mechanical properties, thermal stability, antioxidant and antibacterial properties of the film were systematically tested. The surface morphology, structural properties, mechanical properties, thermodynamic characteristics, etc. of single rice bran protein films (RBP) and RBP NPs films were compared and analyzed. The antioxidant and antibacterial properties of the composite film were tested. Compared with the RBP films, the microstructure of the RBP NPs films with the addition of composite nanoparticles was denser, and there were hydrogen bonds between the membrane substrate, resulting in better compatibility and significantly improved physical properties. The tensile strength was increased to 1.52 MPa, the elongation at break was extended to 55.67%, and the thermal denaturation temperature of the composite film increased from (101.11±1.07) ℃ to (105.63±1.44) ℃, with the enthalpy value increased from (6.28±0.43) J/g to (10.91±0.10) J/g; The opacity of the composite film decreased from 3.90 to 3.13, indicating an improvement in transparency and water holding capacity. Moreover, both the antioxidant and antibacterial properties were significantly enhanced. In conclusion, the performance of the film is significantly improved, providing theoretical reference for the practical application of ε-polylysine and the development of functional biobased films.

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rice bran protein / chitosan / ε-polylysine / film

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WANG Lishuang, ZHI Xiao, SUN Jia, WANG Na. Preparation and Properties of Rice Bran Protein-chitosan-ε-polylysine Nanoparticle Composite Film[J]. Packaging Engineering. 2025, 46(17): 133-143 https://doi.org/10.19554/j.cnki.1001-3563.2025.17.015

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