Smart Colorimetric Corn Starch Films Combined with Anthocyanin-Loaded Glutenin-Carboxymethyl Chitosan Nanocomplexes for Freshness Monitoring of Chilled Pork  

作　　者：Juan Yan Wenchao Li Xianfang Zhang Shisheng Liu 

机构地区：[1]College of Food Science and Engineering,Hainan University,Haikou,570100,China [2]Engineering Research Center for Utilization of Tropical Polysaccharide Resources,Ministry of Education,Haikou,570100,China

出　　处：《Journal of Renewable Materials》2024年第1期71-87,共17页可再生材料杂志（英文）

基　　金：funded by the Hainan Provincial Natural Science Foundation of China[Grant Number 2019RC031];National Natural Science Foundation of China[Grant Number 31460407].

摘　　要：In this study,intelligent,pH-responsive colorimetric films were prepared by encapsulating anthocyanins in nanocomplexes prepared from glutenin and carboxymethyl chitosan.These nanocomplexes were added to a corn starch matrix and used in the freshness monitoring of chilled pork.The effects of anthocyanin-loaded nanocomplexes on the physical,structural,and functional characteristics of the films were investigated.The addition of anthocyanin-loaded nanocomplexes increased the tensile strength,elongation at break,hydrophobicity,and light transmittance of the films while decreasing their water vapor permeability.This is because new hydrogen bonds are formed between the film components,resulting in a more homogeneous and dense structure.The colorimetric film has a significant color response to pH changes.These films were used in experiments on the freshness of chilled pork,in which the pH changes with changing freshness states.The results show that the colorimetric film can monitor changes in the freshness of chilled pork in real time,where orange,pink,and green represent the fresh,secondary fresh,and putrefied states of pork,respectively.Therefore,the intelligent colorimetric film developed in this study has good application potential in the food industry.

关 键 词：Carboxymethyl chitosan GLUTENIN nanocomplexes anthocyanins pH indicator film chilled pork 

分 类 号：TB383[一般工业技术—材料科学与工程]