Preparation and characterization of egg white protein film incorporated with epigallocatechin gallate and its application on pork preservation

Yue Wu; Yuemeng Wang; Jianhao Lv; Han Jiao; Jiahan Liu; Wenhui Feng; Chengfeng Sun; Xin Li

doi:10.1016/j.fochx.2023.100791

Preparation and characterization of egg white protein film incorporated with epigallocatechin gallate and its application on pork preservation

Food Chem X. 2023 Jul 13:19:100791. doi: 10.1016/j.fochx.2023.100791. eCollection 2023 Oct 30.

Authors

Yue Wu¹, Yuemeng Wang², Jianhao Lv¹, Han Jiao³, Jiahan Liu¹, Wenhui Feng¹, Chengfeng Sun¹, Xin Li¹

Affiliations

¹ School of Life Sciences, Yantai University, Yantai, Shandong 264005, China.
² School of Food and Biological Engineering, Yantai Institute of Technology, Yantai, Shandong 264003, China.
³ Anhui Rongda Food Co., Ltd., Guangde, Anhui 242200, China.

Abstract

The aim of this study was to develop the composite films with antioxidant and biodegradable activity based on egg white protein (EWP) and epigallocatechin gallate (EGCG). Water susceptibility, light transmittance, microstructure and antioxidant properties of the composite films without and with EGCG were fully characterized. It was noted that the addition of EGCG might decrease the moisture content, water solubility and swelling capacity. SEM micrographs revealed that discontinuous blocks and rough surfaces were caused by increasing concentration of EGCG, whereas compact and homogeneous particles appeared when the concentration of EGCG reached to 80 μmol/L. Moreover, the biodegradability of the composite films was demonstrated by the soil degradation properties that they can be almost completely degraded within ten days. Experimental results on the application in chilled fresh pork showed that the EWP-based films could play an antioxidant role when incorporated with EGCG, indicating their great potential for food packaging.

Keywords: Antioxidant activities; Biodegradability; Egg white protein film; Epigallocatechin gallate; Structural properties.