Disintegrability under composting conditions of films based on gelatin, chitosan and/or sodium caseinate containing boldo-of-Chile leafs extract

Autor(es)

Bonilla, Jeannine ^[1] ; Sobral, Paulo J. A.

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Fac Anim Sci & Food Engn, Av Duque Caxias Norte 225, BR-13635900 Pirassununga, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: International Journal of Biological Macromolecules; v. 151, p. 178-185, MAY 15 2020.
• Citações Web of Science: 1

Resumo

Biodegradable films based on pure gelatin (GEL100), chitosan (CH100) and sodium caseinate (SCas100), and gelatin-chitosan (GEL50:CH50) and gelatin-sodium caseinate (GEL50:SCas50) blends, without or with boldoof-Chile leafs extract (BoC) were studied. The solubility in water (%) of all the pure films was analyzed. Moreover, the disintegration process was evaluated throughout the mass loss (%), structural (MR) changes and visual analyses of films up to 5 days of composting conditions. The Boltzmann function allowed obtaining the half-maximal disintegration time (t(50)) of all the films. Only Scas100 films exhibited complete solubility in water, compared to the other films (P< 0.05). At day 1, SCas100 + B film exhibited total mass loss, meanwhile for the other film samples this parameter varied between 47.9 +/- 3.0% (CH100 B) and 6.8 +/- 13% (GEL100 + B) (P< 0.05). FTIR analysis showed some changes in the intensity of the typical bands of the pure or blended films. Photographs registered exhibited the complete disintegration of all films into 5 days. Finally, Boltzmann equation displayed that pure SCas100 film disintegrated in the shortest time (0500 days), and GEL50:CH50 blended film in the longest time (1.766 days). In conclusion, the results of this work show an appropriate and complete disintegration of all studied films in composting conditions. (C) 2020 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 14/03288-8 - Desenvolvimento e aplicação de filmes comestíveis ativos com propriedades antioxidantes e/ou antimicrobianas para uso em alimentos
• Beneficiário: María Jeannine Bonilla Lagos
• Linha de fomento: Bolsas no Brasil - Pós-Doutorado