Food and Fermentation Industries >

2024 , Vol. 50 >Issue 23: 114 - 122

DOI: https://doi.org/10.13995/j.cnki.11-1802/ts.038323

Preparation and characterisation of silver-loaded nanocellulose-collagen peptide composite films

  • SUN Baolong ,
  • LI Caiyun ,
  • ZHANG Yubin ,
  • ZHANG Li
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  • (College of Food Science and Engineering, Gansu Agricultural University, Lanzhou 730070, China)

Received date: 2023-12-20

  Revised date: 2024-02-05

  Online published: 2024-12-27

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Abstract

To develop a composite membrane with bacteriostatic effect and biodegradable,in this experiment, a silver-loaded nanocellulose prepared by ammonium sulfate hydrolysis of microcrystalline cellulose was added to silver nitrate solution as a reinforcement, and silver-loaded nanocellulose as a reinforcing agent with collagen peptide as the substrate, and a silver-loaded nanocellulose-collagen peptide composite membrane with good comprehensive performance was prepared.Response surface methodology was used to optimise the effects of different nanocellulose additions, sodium chloride additions, pH and reaction temperature on the mechanical properties of nanocellulose-collagen peptide composite membranes.Physical parameters such as tensile strength of composite films with different silver nanoparticles content were determined and their structures were characterised by Fourier infrared spectroscopy analysis and scanning electron microscopy.Results showed that the tensile strength of the resulting composite film was 12.25 MPa when nanocellulose was added at 3.34% (mass fraction), sodium chloride was added at 5.35% (mass fraction), pH was 7.1, and the heating temperature was 41 ℃.When the theoretical mass of nanosilver accounted for 6% of the mass of nanocellulose, the tensile strength of the composite film was 18.17 MPa, which increased the tensile strength by 64.28% compared with that of nanocellulose-collagen peptide composite film, and at the same time, the elongation at break decreased by 31.58%, the opacity increased by 95.15%, and the water vapour transmission coefficient decreased by 40.86 %.In conclusion, silver-loaded 6% nanocellulose can effectively enhance the comprehensive performance of silver-loaded nanocellulose-collagen peptide composite membrane.

Key words： bovine collagen peptide; silver nanoparticles; nanocellulose; silver-loaded nanocellulose; biodegradable membranes

Cite this article

SUN Baolong , LI Caiyun , ZHANG Yubin , ZHANG Li . Preparation and characterisation of silver-loaded nanocellulose-collagen peptide composite films[J]. Food and Fermentation Industries, 2024 , 50(23) : 114 -122 . DOI: 10.13995/j.cnki.11-1802/ts.038323

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