Work

Nano-chitosan-nisin composite membrane: Physicochemical properties and its impact on sturgeon storage quality

Year: 2024

Type: article

Abstract: In this study, gelatin was used as the film-forming matrix, and nanoparticles were introduced into chitosan-Nisin film ( Ch-Nisin ) to prepare nano-chitosan-Nisin composite film ( Nch-Nisin ). The physicochemical properties of the film and its effect on the quality of sturgeon during storage were investigated. The tensile strength of Nch-Nisin film and Ch-Nisin film were 113.74 MPa and 101.70 MPa, respectively. The elongation at break was 31.43 % and 26.30 %, respectively. The transmittance showed that Nch-Nisin had higher light blocking ability than Ch-Nisin. SEM observation showed that there were many undulating surfaces on the surface of Nch-Nisin film. XRD and FTIR analysis proved the compatibility and stability between the nanoparticles and the film matrix. Thermogravimetric analysis showed that the Nch-Nisin film had good thermal stability. The Nch-Nisin membrane showed higher DPPH and ABTS antioxidant activity and antibacterial properties than the Ch-Nisin membrane. By conducting preservation trials on sturgeon using PE film as a control, both Ch-Nisin and Nch-Nisin films effectively suppressed the increases in pH, TBARS, TVB-N, and TVC values and protein oxidation. Notably, Nch-Nisin exhibited a more pronounced inhibitory effect compared to Ch-Nisin. This study's findings contribute theoretical foundations for advancing eco-friendly food preservation film technologies.

Source: LWT

DOI: 10.1016/j.lwt.2024.117267