The effect of gamma radiation on the stability of aqueous dispersions of graphene oxide and graphene oxide functionalized with amino-peg
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2018
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CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.
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Nanocomposites based on graphene have been prominent in the field of biomedicine
due to the biocompatibility with the physiological medium and the possibility of being
functionalized by a series of biocompatible polymers, such as chitosan, polyethylene
glycol, poly (caprolactone), among others. However, there is a need for sterilization of
these nanomaterials in the medical field and gamma irradiation is a promising option.
In the present work graphene oxide (GO), produced by the modified Hummers method,
was functionalized with amino-PEG (GO-PEG-NH2) through the amidation process.
The objective of this study was to evaluate the aqueous dispersions stability of these
nanomaterials before and after gamma radiation (Cobalt 60) at a dose of 25 kGy.
Dynamics light scattering (DLS) was used to determine the zeta potential. The results
showed no significant differences between the zeta potentials of the non-irradiated and
irradiated graphene oxide. The dispersion of the functionalized graphene oxide
showed to be stable and the irradiated unstable.
Como referenciar
SOARES, J.J.S.; SANTOS, P.S.; ZAIM, M.H.; SAKATA, S.K. The effect of gamma radiation on the stability of aqueous dispersions of graphene oxide and graphene oxide functionalized with amino-peg. In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23., 04-08 de novembro, 2018, Foz do Iguaçu, PR. Resumo... p. 2343-2343. Disponível em: http://repositorio.ipen.br/handle/123456789/29525. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.