Eco-friendly preparation of electrically conductive chitosan - reduced graphene oxide flexible bionanocomposites for food packaging and biological applications
authors Barra, A; Ferreira, NM; Martins, MA; Lazar, O; Pantazi, A; Jderu, AA; Neumayer, SM; Rodriguez, BJ; Enachescu, M; Ferreira, P; Nunes, C
nationality International
journal COMPOSITES SCIENCE AND TECHNOLOGY
author keywords Bionanocomposites; Chitosan; Reduced graphene oxide; Hydrothermal reduction; Electrical conductivity
keywords ANTIOXIDANT ACTIVITY; HYDROTHERMAL REDUCTION; CHEMICAL-REDUCTION; RAMAN-SPECTROSCOPY; GREEN REDUCTION; CAFFEIC ACID; FILMS; NANOCOMPOSITES; FUNCTIONALIZATION; FABRICATION
abstract Electrically conductive materials have been highlighted in the biomedical and food packaging areas. Conventional electrically conductive polymers have limited biodegradability and biocompatibility and should be replaced by suitable biomaterials. Herein, electrically conductive bionanocomposites of chitosan and reduced graphene oxide were produced by a green methodology. The reduced graphene oxide was hydrothermally reduced in the presence of caffeic acid and was dispersed into chitosan. The final bionanocomposites achieved an electrical conductivity of 0.7 S/m in-plane and 2.1 x 10(-5) S/m through-plane. The reduced graphene oxide promoted a great enhancement of antioxidant activity and a mechanical reinforcement of chitosan matrix, increasing the tensile strength and decreasing the water solubility. The electrical conductivity, mechanical properties and antioxidant activity of the bionanocomposites can be tuned according to the filler content. These active bionanocomposites, prepared using a green methodology, revealed good electrical and mechanical properties, which make them promising materials for food packaging and biological applications.
publisher ELSEVIER SCI LTD
issn 0266-3538
year published 2019
volume 173
beginning page 53
ending page 60
digital object identifier (doi) 10.1016/j.compscitech.2019.01.027
web of science category Materials Science, Composites
subject category Materials Science
unique article identifier WOS:000461002100008

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