Amaranth protein films reinforced with maize starch nanocrystals

Authors
Condes, María Cecilia; Añon, Maria Cristina; Mauri, Adriana Noemi; Dufresne, Alain
Publication Year
2015
Language
English
Format
article
Status
Published version
Description
The effect of the addition of starch nanocrystals e prepared from waxy and normal maize starch granules e to amaranth protein formulations on the physicochemical and structural properties of the resulting nanocomposite films was studied. All nanocomposites films were homogeneous, translucent and had similar thickness and optical properties than the neat protein film due to the good dispersion of the nanoreinforcements in the protein matrix and the good chemical affinity between both components. Nevertheless, the presence of nanocrystals affected differently the way in which protein matrix stabilized, according to the origin of the reinforcement: mainly by disulfide bonds for waxy maize nanocrystals and by hydrogen bonds for normal maize nanocrystals. This induced a different reinforcing effect for amaranth protein films, being more significant for normal maize nanocrystals that however presented a lower crystallinity. Moreover, nanocomposite films presented improved water vapor permeability (WVP), water uptake (WU), surface hydrophobicity and mechanical behavior than proteins films and also a delay in their weight loss in soil.
Fil: Condes, María Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Centro de Investigaciones en Criotecnología de Alimentos (i); Argentina
Fil: Añon, Maria Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Centro de Investigaciones en Criotecnología de Alimentos (i); Argentina
Fil: Mauri, Adriana Noemi. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Centro de Investigaciones en Criotecnología de Alimentos (i); Argentina. Universidad Nacional de La Plata; Argentina
Fil: Dufresne, Alain. Université Grenoble Alpes; Francia. Centre National de la Recherche Scientifique; Francia
Subject
Bionanocomposites
Biodegradable films
Starch nanocrystals
Botanical origen
Amaranth proteins
Nano-materiales
Nanotecnología
INGENIERÍAS Y TECNOLOGÍAS
Access level
Restricted access
License
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/10232