Use of Cold Plasma as an Alternative to Improve Corn Starch-Based Films: Effect of the Plasma Application Strategy

Starch-based biodegradable films are a type of packaging material that can naturally decompose in the environment. Current challenges regarding starch-based film applications are their high solubility and low hydrophobicity. Prior studies have shown that plasma application improves the physical, che...

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Bibliographic Details
Published in:Processes 2024-07, Vol.12 (7), p.1429
Main Authors: Goiana, Mayara Lima, Mattos, Adriano Lincoln Albuquerque, Rosa, Morsyleide de Freitas, Fernandes, Fabiano André Narciso
Format: Article
Language:English
Subjects:
Biopolymers
Cold
Cold plasmas
Contact angle
Design of experiments
Ecological footprint
Electrodes
Fossil fuels
Gases
Glycerol
Hydrophobicity
Iodine
Mechanical properties
Packaging materials
Plasma
Solubility
Starch
Viscosity
Water
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Summary:Starch-based biodegradable films are a type of packaging material that can naturally decompose in the environment. Current challenges regarding starch-based film applications are their high solubility and low hydrophobicity. Prior studies have shown that plasma application improves the physical, chemical, and mechanical properties of these films. This work evaluates the plasma application strategy regarding the process stage in which plasma should be applied (starch granule, film-forming solution, or film). Three groups of films were produced: a film produced with the plasma-treated starch, a film produced by subjecting the film-forming solution to plasma treatment, and a plasma-treated film produced with the untreated starch. A 22 face-centered experimental design was applied to each group of films to attain the optimal film of each group. The design consisted of applying plasma at 100, 200, and 300 Hz for 0, 10, and 20 min to each group. The results showed significant differences regarding their physical-chemical and morphological properties. Most chemical changes occurred in the starch subjected to plasma prior to film formation, while the films produced with the untreated starch presented physical changes. Plasma-treated films presented reduced solubility and higher hydrophobicity.
ISSN:2227-9717
2227-9717
DOI:10.3390/pr12071429