Cellulose nanocrystals from grape pomace and their use for the development of starch-based nanocomposite films

Nanocomposite films prepared from starch (ST) in the presence of cellulose nanocrystals (CNCs) was performed using grape pomace as raw material. CNCs were obtained by acid hydrolysis and added to filmogenic solutions (1, 2, 5, 10 and 15 g/100 g of ST). Cellulose, CNCs and Nanocomposites were charact...

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Bibliographic Details
Published in:International journal of biological macromolecules 2020-09, Vol.159, p.1048-1061
Main Authors: Coelho, Caroline Corrêa de Souza, Silva, Raysa Brandão Soares, Carvalho, Carlos Wanderlei Piler, Rossi, André Linhares, Teixeira, José António, Freitas-Silva, Otniel, Cabral, Lourdes Maria Correa
Format: Article
Language:English
Subjects:
acid hydrolysis
agricultural wastes
Barrier properties
Biopolymers
cellulose
Cellulose - analogs & derivatives
Edible Films
Elastic Modulus
grape pomace
Mechanical properties
Nanocomposites
Nanocomposites - chemistry
nanocrystals
Nanoparticles - chemistry
Packaging
permeability
raw materials
starch
Starch - analogs & derivatives
Tensile Strength
Vitis - chemistry
water vapor
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Summary:Nanocomposite films prepared from starch (ST) in the presence of cellulose nanocrystals (CNCs) was performed using grape pomace as raw material. CNCs were obtained by acid hydrolysis and added to filmogenic solutions (1, 2, 5, 10 and 15 g/100 g of ST). Cellulose, CNCs and Nanocomposites were characterized. Amorphous non-cellulosic materials were removed from the grape pomace presented values for CrI 64% and 71% and yield 12 and 70% in Cellulose and CNCs, respectively. Nanocomposites showed smaller permeability and the addition of 5 to 15% CNCs formed more opaque films and had improved tensile strength and Young’s modulus. The addition of CNCs from 5 to 15% proved to be effective in improving mechanical properties and decreasing water vapor permeability, important characteristics in food packaging materials. This study provided an effective method to obtain CNCs from the agroindustrial waste and open the way to produce high-value starch based nanocomposites. [Display omitted] •Grape pomace can be used as raw material for celllulose and cellulose nanocrystals.•Acid hydrolysis leads to the production of high crystallinity cellulose nanocrystals.•The incorporation of the cellulose nanocrystals was able to decrease the WVP values of the films.•The incorporation of cellulose nanocrystals increased the tensile strength and Young's modulus in the films.
ISSN:0141-8130
1879-0003
DOI:10.1016/j.ijbiomac.2020.05.046