| Texto completo | |
| Autor(es): |
Valencia, German Ayala
;
Luciano, Carla Giovana
;
Lourenco, Rodrigo Vinicius
;
do Amaral Sobral, Paulo Jose
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | International Journal of Biological Macromolecules; v. 107, p. 8-pg., 2018-02-01. |
| Resumo | |
The aim of this research was to study the effects of laponite concentrations on some properties of nano-biocomposite films based on cassava starch, focusing mainly the relation between the properties of the surface microstructure and roughness, water contact angle and gloss. Nano-biocomposite films were produced by casting. We analyzed gloss, color, opacity, water contact angle, crystallinity by X-ray diffraction, and microstructure by scanning electron microscopy and atomic force microscopy. Texture parameters (energy, entropy and fractal dimension) were extracted from micrographs. We observed a great impact of laponite in the morphology of nano-biocomposite films. Texture parameters correlated with surface heterogeneity and roughness. Finally, surface roughness affected the surface hydrophilicity of nano-biocomposite films. Laponite platelets were exfoliated and/or intercalated with amylose and amylopectin chains. This research reports new information on the effects of laponite concentrations on the morphological, optical and wetting properties of nano-biocomposite films aiming future industrial applications. (C) 2017 Elsevier B.V. All rights reserved. (AU) | |
| Processo FAPESP: | 12/24047-3 - Propriedades físicas de filmes a base de biopolímeros reforçados com laponita |
| Beneficiário: | Germán Ayala Valencia |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 13/07914-8 - FoRC - Centro de Pesquisa em Alimentos |
| Beneficiário: | Bernadette Dora Gombossy de Melo Franco |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |