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

    Year: 2020

    Journal: Int. J. Biol. Macromol., Volume 159, SEP 15, page 1048–1061

    Authors: de Souza Coelho, Caroline Correa; Soares Silva, Raysa Brandao; Piler Carvalho, Carlos Wanderlei; Rossi, Andre Linhares; Teixeira, Jose Antonio; Freitas-Silva, Otniel; Correa Cabral, Lourdes Maria

    Organizations: FAPERJ -Fundacao de Amparo a Pesquisa do Estado do Rio de Janeiro, BrazilFundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio De Janeiro (FAPERJ) [E-26.202749/2018]; National Council for Scientific and Technological Development -CNPqConselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ) [311936/2018-0]; Coordenacao de Aperfeicoamento Pessoal do Ensino Superior (CAPES)Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)

    Keywords: Packaging; Biopolymers; Nanocomposites; Mechanical properties; Barrier properties

    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/1 00 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 per-meability, important characteristics in food packaging materials. This study provided an effective method to ob-tain CNCs from the agroindustrial waste and open the way to produce high-value starch based nanocomposites. (C) 2020 Elsevier B.V. All rights reserved.
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