Preparation and characterization of TiO2-Ag loaded fish gelatin-chitosan antibacterial composite film for food packaging

Derong Lin; Yuanmeng Yang; Jie Wang; Wenjing Yan; Zhijun Wu; Hong Chen; Qing Zhang; Dingtao Wu; Wen Qin; Zongcai Tu

doi:10.1016/j.ijbiomac.2020.03.070

Preparation and characterization of TiO₂-Ag loaded fish gelatin-chitosan antibacterial composite film for food packaging

Int J Biol Macromol. 2020 Jul 1:154:123-133. doi: 10.1016/j.ijbiomac.2020.03.070. Epub 2020 Mar 19.

Authors

Derong Lin¹, Yuanmeng Yang², Jie Wang², Wenjing Yan², Zhijun Wu³, Hong Chen², Qing Zhang², Dingtao Wu², Wen Qin², Zongcai Tu⁴

Affiliations

¹ College of Food Science, Sichuan Agricultural University, Ya'an 625014, China. Electronic address: lindr2018@sicau.edu.cn.
² College of Food Science, Sichuan Agricultural University, Ya'an 625014, China.
³ College of Mechanical and Electrical Engineering, Sichuan Agricultural University, Ya'an 625014, China. Electronic address: wzj@sicau.edu.cn.
⁴ National R&D Center for Freshwater Fish Processing, Jiangxi Normal University, Nanchang 330022, China; Engineering Research Center for Freshwater Fish High-value Utilization of Jiangxi, Jiangxi Normal University, Nanchang 330022, China; State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China.

PMID: 32171840
DOI: 10.1016/j.ijbiomac.2020.03.070

Abstract

In this study, fish gelatin and chitosan were used as the film-forming substrate, and different concentrations of TiO₂-Ag were added to prepare composite films. The physicochemical characteristics and microstructure of the films were studied. The results showed that the addition of TiO₂-Ag significantly increased the water solubility of the film. When the TiO₂-Ag concentration was increased to 0.5%, the film had the best antibacterial ability and the lowest light transmittance (54.6%), but the tensile strength of the film was the lowest, decreased from 17.39 MPa to 9.014 MPa. The water vapor permeability of film first decreased and then increased, and the minimum value was 2.63 × 10^-12 g·cm/cm²·s·Pa when the concentration of TiO₂-Ag was 0.4%. XRD, XPS, and ATR-FTIR results showed that the presence of TiO₂-Ag crystals in the film could enhance the interaction between the components, and FE-SEM results showed that the film had a very smooth and uniform surface. In general, FG/Ch/TiO₂-Ag composite film is expected to be used in the food packaging industry.

Keywords: Composite films; Fish gelatin-chitosan; Food packaging; TiO(2)-Ag.

MeSH terms

Animals
Anti-Bacterial Agents / chemistry*
Anti-Bacterial Agents / pharmacology
Chitosan / chemistry*
Fishes*
Food Packaging / methods*
Gelatin / chemistry*
Mechanical Phenomena
Silver / chemistry*
Solubility
Steam
Titanium / chemistry*

Substances

Anti-Bacterial Agents
Steam
titanium dioxide
Silver
Gelatin
Chitosan
Titanium