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.
Resumo
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: 12 May 2024.
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.