Materials 2013, 6(3), 911-926; doi:10.3390/ma6030911
Article

Covalently Bonded Chitosan on Graphene Oxide via Redox Reaction

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Received: 4 January 2013; in revised form: 7 February 2013 / Accepted: 26 February 2013 / Published: 7 March 2013
(This article belongs to the Special Issue Advances in Multifunctional Materials)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: Carbon nanostructures have played an important role in creating a new field of materials based on carbon. Chemical modification of carbon nanostructures through grafting has been a successful step to improve dispersion and compatibility in solvents, with biomolecules and polymers to form nanocomposites. In this sense carbohydrates such as chitosan are extremely valuable because their functional groups play an important role in diversifying the applications of carbon nanomaterials. This paper reports the covalent attachment of chitosan onto graphene oxide, taking advantage of this carbohydrate at the nanometric level. Grafting is an innovative route to modify properties of graphene, a two-dimensional nanometric arrangement, which is one of the most novel and promising nanostructures. Chitosan grafting was achieved by redox reaction using different temperature conditions that impact on the morphology and features of graphene oxide sheets. Transmission Electron Microscopy, Fourier Transform Infrared, Raman and Energy Dispersive spectroscopies were used to study the surface of chitosan-grafted-graphene oxide. Results show a successful modification indicated by the functional groups found in the grafted material. Dispersions of chitosan-grafted-graphene oxide samples in water and hexane revealed different behavior due to the chemical groups attached to the graphene oxide sheet.
Keywords: chitosan; grafting; graphene oxide; carbon nanostructure; redox reaction
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MDPI and ACS Style

Bustos-Ramírez, K.; Martínez-Hernández, A.L.; Martínez-Barrera, G.; Icaza, M.D.; Castaño, V.M.; Velasco-Santos, C. Covalently Bonded Chitosan on Graphene Oxide via Redox Reaction. Materials 2013, 6, 911-926.

AMA Style

Bustos-Ramírez K, Martínez-Hernández AL, Martínez-Barrera G, Icaza MD, Castaño VM, Velasco-Santos C. Covalently Bonded Chitosan on Graphene Oxide via Redox Reaction. Materials. 2013; 6(3):911-926.

Chicago/Turabian Style

Bustos-Ramírez, Karina; Martínez-Hernández, Ana L.; Martínez-Barrera, Gonzalo; Icaza, Miguel D.; Castaño, Víctor M.; Velasco-Santos, Carlos. 2013. "Covalently Bonded Chitosan on Graphene Oxide via Redox Reaction." Materials 6, no. 3: 911-926.

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