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Type: Artigo de periódico
Title: Fabrication Of Transparent And Ultraviolet Shielding Composite Films Based On Graphene Oxide And Cellulose Acetate.
Author: de Moraes, Ana Carolina Mazarin
Andrade, Patricia Fernanda
de Faria, Andreia Fonseca
Simões, Mateus Batista
Salomão, Francisco Carlos Carneiro Soares
Barros, Eduardo Bedê
Gonçalves, Maria do Carmo
Alves, Oswaldo Luiz
Abstract: Graphene oxide (GO) has been considered a promising filler material for building polymeric nanocomposites because of its excellent dispersibility and high surface area. In this work, we present the fabrication and characterization of transparent and ultraviolet (UV) shielding composite films based on GO and cellulose acetate (CA). GO sheets were found to be well-dispersed throughout the CA matrix, providing smooth and homogeneous composite films. Moreover, the GO sheets were completely embedded within the CA matrix and no presence of this nanomaterial was found at the surface. Nevertheless, CAGO composite films offered an improved high energy light-shielding capacity when compared to pristine CA films. Particularly for UVC irradiation, the CAGO film containing 0.50wt% GO displayed a UV-shielding capacity of 57%, combined with 79% optical transparency under visible light. These CAGO composite films can be potentially applied as transparent UV-protective coatings for packing biomedical, pharmaceutical, and food products.
Subject: Cellulose Acetate
Composite Films
Graphene Oxide
Ultraviolet Shielding
Citation: Carbohydrate Polymers. v. 123, p. 217-227, 2015-Jun.
Rights: embargo
Identifier DOI: 10.1016/j.carbpol.2015.01.034
Date Issue: 2015
Appears in Collections:Unicamp - Artigos e Outros Documentos

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