Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/10930
Título : Development of chitosan/montmorillonite nanocomposites with encapsulated α-tocopherol
Autor: Dias, Marali Vilela
Azevedo, Viviane Machado de
Borges, Soraia Vilela
Soares, Nilda de Fatima Ferreira
Fernandes, Regiane Victória de Barros
Marques, João José Granate de Sá e Melo
Medeiros, Eber Antonio Alves
Palavras-chave: Moisture resistance
Structural properties
Morphological properties
Packaging
Publicador: Elsevier; Applied Science Publishers
Data da publicação: 1-Jun-2014
Referência: DIAS, M. V. et al. Development of chitosan/montmorillonite nanocomposites with encapsulated α-tocopherol. Food Chemistry, London, v. 165, p. 323-329, 15 Dec. 2014.
Abstract: Nanocomposites of chitosan (CS) were developed and characterized in a full factorial design with varying levels of montmorillonite (MMTNa) and encapsulated tocopherol (toc-encap). The structural properties (XRD, FTIR), morphology (TEM), hygroscopic properties (water vapour permeability, hydrophobicity, sorption isotherms) and optical properties (haze, CIELab parameters) of the resulting materials were evaluated. Toc-encap contents up to 10% influenced the intercalation of MMTNa in the CS matrix, resulting in films with reduced water vapour permeability (3.48 × 10–11 (g/m s Pa)), increased hydrophobicity (ΔGHydroph |7.93–59.54| mJ m−2) and lower equilibrium moisture content (EMC), thus showing potential for active food packaging materials. At levels above 10%, toc-encap agglomerates occurred, which deteriorated the properties of the resulting films, as shown with the TEM. As the toc-encap content increased, the films became slightly more yellow, more irregular and less transparent, with a higher haze index.
URI: http://www.sciencedirect.com/science/article/pii/S030881461400836X
http://repositorio.ufla.br/jspui/handle/1/10930
Idioma: en_US
Aparece nas coleções:DCA - Artigos publicados em periódicos

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