Sustainable Bioactive Packaging Based on Thermoplastic Starch and Microalgae

This study combines the use of corn starch and microalgae for the production of antioxidant starch films as flexible packaging material. Starch was plasticized with glycerol and blended with 1 w% polyallylamine chosen as an agent to modify the film physical properties. The addition of polyallylamine...

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Bibliographic Details
Published in:International journal of molecular sciences 2021-12, Vol.23 (1), p.178
Main Authors: Tedeschi, Anna Martina, Di Caprio, Fabrizio, Piozzi, Antonella, Pagnanelli, Francesca, Francolini, Iolanda
Format: Article
Language:English
Subjects:
Algae
antioxidant packaging
Antioxidants
Aquatic microorganisms
Biological activity
Bioplastics
Chlorophyceae
Contact angle
flexible packaging
food
Food Packaging
Food preservation
Glycerol
Investigations
Low density polyethylenes
Mechanical properties
Microalgae
Physical properties
Plastics
Polyallylamine
Polyethylene terephthalate
Polymers
Reagents
Starch
Stiffness
Tensile strength
Tetradesmus obliquus
Water stability
Water vapor
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Summary:This study combines the use of corn starch and microalgae for the production of antioxidant starch films as flexible packaging material. Starch was plasticized with glycerol and blended with 1 w% polyallylamine chosen as an agent to modify the film physical properties. The addition of polyallylamine improved film water stability and water vapor transmission rate as well as mechanical stiffness and tenacity. The dried microalgae, which showed an EC value of 2.8 mg/mg DPPH (2.2-Diphenyl-1-picrylhydrazyl radical), was then used as antioxidant filler. The addition of microalgae provided the films with good antioxidant activity, which increased with microalgae content increasing. To our knowledge, this is the first study reporting the development of sustainable bioactive packaging films composed of almost 100% starch, and follows the European union's goals on plastics strategy concerning the promotion of bio-based, compostable plastics and the setting up of approaches to prevent food waste with a simple plastic packaging.
ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms23010178