Improvements of thermal and mechanical properties of achira starch/chitosan/clay nanocomposite films

Thermoplastic biofilms were developed from achira starch, chitosan and nanoclays using the solvent-casting method. To obtain the filmogenic solutions, different sonication times (0, 10, 20 and 30 min) were considered in order to evaluate the incidence of this parameter on the chemical and physico-me...

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Bibliographic Details
Published in:Heliyon 2023-06, Vol.9 (6), p.e16782-e16782, Article e16782
Main Authors: Aguirre-Loredo, Rocio Yaneli, Fonseca-García, Abril, Calambas, Heidy Lorena, Salazar-Arango, Alejandra, Caicedo, Carolina
Format: Article
Language:English
Subjects:
Biodegradable films
Biopolymers
Nanoclay
Nanomaterials
Thermoplastic starch
Ultrasonication
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Summary:Thermoplastic biofilms were developed from achira starch, chitosan and nanoclays using the solvent-casting method. To obtain the filmogenic solutions, different sonication times (0, 10, 20 and 30 min) were considered in order to evaluate the incidence of this parameter on the chemical and physico-mechanical properties of the bionanocomposite films. The chemical analysis using FTIR spectroscopy showed strong intermolecular interactions between the components with increasing sonication times. The results for tensile strength and elongation were satisfactory for films with 20 min of sonication with increases of 154% and 161%, respectively. Morphological analysis showed greater homogeneity, while thermal analysis showed that sonication favoured the plasticization process and thus, the production of homogeneous materials. The water absorption and wettability tests showed less hydrophilic materials allowing these new materials to be considered for use as coatings or packaging for the food sector. [Display omitted]
ISSN:2405-8440
2405-8440
DOI:10.1016/j.heliyon.2023.e16782