Development of Biodegradable Alginate-Based Films with Bioactive Properties and Optimal Structural Characteristics with Incorporation of Protein Hydrolysates

Oksana Zinina, Svetlana Merenkova () and Damir Galimov
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Oksana Zinina: Department of Food and Biotechnology, South Ural State University (National Research University), 76 Lenin Avenue, 454080 Chelyabinsk, Russia
Svetlana Merenkova: Department of Food and Biotechnology, South Ural State University (National Research University), 76 Lenin Avenue, 454080 Chelyabinsk, Russia
Damir Galimov: Nanotechnology Research & Education Centre, South Ural State University (National Research University), 76 Lenin Avenue, 16, 454080 Chelyabinsk, Russia

Sustainability, 2023, vol. 15, issue 20, 1-18

Abstract: Alginate is widely used in the food industry due to its biodegradability, biocompatibility, and non-toxicity. Protein hydrolysates possess properties important for forming the mechanical characteristics, protective, and barrier properties of the films. The aim of the research was to develop biodegradable alginate-based films with bioactive properties and the optimal structural characteristics when protein hydrolysates were incorporated. The microstructure of the cross-sections of films with 0.5 and 1.0% protein hydrolysates was characterized by smoother and homogeneous surfaces, which indicated the compatibility of sodium alginate and protein hydrolysate. The addition of protein hydrolysate significantly increased the thickness of the film by 0.06 mm and reduced the solubility by 49.4% ( p < 0.05). The results showed the high biodegradability of alginate-based films after 2 weeks of storage. With the introduction of protein hydrolysate, changes occurred in the FTIR patterns due to the interaction between the hydroxyl groups of peptides and the alginate, and, consequently, the thermal stability of the alginate films increased. The alginate films with PH positively affected the storage capacity of sweet cherry berries, both at room temperature and under refrigeration conditions. The alginate-based films with protein hydrolysate have improved properties and can serve as an alternative to polypropylene packaging materials.

Keywords: alginate; film coating; protein hydrolysate; biodegradability; solubility; microstructure; thickness; solubility; chemical relationships; thermal stability; food storage function (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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