Effect of mixture microstructure/compatibility on the properties of type-A gelatin-dextran edible films

Ling Wu; Bo Cui; Die Dong; Zhengzong Wu; Jianpeng Li; Lu Lu; Na Wang; Katsuyoshi Nishinari; Meng Zhao

doi:10.1016/j.carbpol.2023.121733

Effect of mixture microstructure/compatibility on the properties of type-A gelatin-dextran edible films

Carbohydr Polym. 2024 Apr 1:329:121733. doi: 10.1016/j.carbpol.2023.121733. Epub 2023 Dec 25.

Authors

Ling Wu¹, Bo Cui², Die Dong², Zhengzong Wu², Jianpeng Li², Lu Lu², Na Wang², Katsuyoshi Nishinari³, Meng Zhao⁴

Affiliations

¹ State Key Laboratory of Biobased Material and Green Papermaking, School of Food Science and Technology, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China; Glyn O. Phillips Hydrocolloid Research Centre at HUT, Hubei University of Technology, Wuhan 430068, China.
² State Key Laboratory of Biobased Material and Green Papermaking, School of Food Science and Technology, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China.
³ Glyn O. Phillips Hydrocolloid Research Centre at HUT, Hubei University of Technology, Wuhan 430068, China.
⁴ State Key Laboratory of Biobased Material and Green Papermaking, School of Food Science and Technology, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China. Electronic address: 2001zhaomeng@163.com.

PMID: 38286534
DOI: 10.1016/j.carbpol.2023.121733

Abstract

The influence of phase separation behavior on bio-based film properties has attracted more and more attention. This work investigated the effects of microstructure and compatibility of the type-A gelatin (GE)-dextran (DE) mixtures on GE-DE edible film properties. Three kinds of GE-DE edible films with different textures were prepared via modulating the microstructure and compatibility of film-forming mixtures using the method of gelation-drying, e.g., homogeneous films, microphase separated films with relatively homogeneous texture, and microphase separated films with uneven texture. The optical, mechanical, water barrier, and thermal properties of films were characterized. Results showed that microstructure and compatibility significantly affected the film properties. In general, films with DE-in-GE microstructure exhibited the best film properties, followed by films with water-in-water-in-water/bicontinuous microstructure, and then films with GE-in-DE microstructure. And homogeneous films showed the best film properties, followed by films with relatively homogeneous texture, and then films with uneven texture. The weight loss results suggested the potential of GE-DE edible films for application in cherry tomato preservation. This work provided interesting information for the design of film with fabricated microstructure and properties.

Keywords: Compatibility; Edible film; Film properties; Microstructure; Phase separation.