The effect of gamma radiation on the structure of graphene oxide and graphene oxide functionalized with amino-PEG

Authors

  • Jaqueline Jamara Souza Soares IPEN - Nuclear and Energy Research Institute
  • Raynara Maria Silva Jacovone IPEN - Nuclear and Energy Research Institute
  • Paulo SOUZA Santos IPEN - Nuclear and Energy Research Institute
  • Márcio Henrique Zaim University of São Paulo
  • Dalva Lucia Araújo Faria University of São Paulo
  • Solange Kazumi Sakata IPEN - Nuclear and Energy Research Institute

DOI:

https://doi.org/10.15392/bjrs.v7i3.837

Keywords:

Functionalization, nanocomposite, graphene oxide.

Abstract

ABSTRACT

 

Covalent functionalization of graphene oxide (GO) with polyethylene glycol (PEG) has been widely used in drug delivery systems. This nanocomposite exhibits excellent stability in the presence of high concentrations of salts and proteins and shows low toxicity compared to its raw form. However, must be sterilized prior to use in medical devices, and the gamma irradiation shows a promising option for this purpose. Sterilization by ionizing energy through gamma rays, generated by Cobalt-60 self-disintegration, consists in exposing the materials to short electromagnetic waves. The irradiation process provides substantial advantages when compared to thermal and chemical processes such as more precise control of the process, lower energy consumption, and less environmental pollution. In this work the effects of gamma radiation on GO and GO functionalized com Amino-PEG (GO-PEG-NH2) irradiated with doses (15, 25, 35 and 50 kGy) that have been used to sterilize medical devices and at rate dose 7.3 kGy.h-1 were evaluated. The analyses were performed by Fourier-transform infrared spectroscopy (FT-IR) and Raman spectroscopy. The results showed that gamma radiation up to 50 kGy did  not cause any defects on the nanomaterials.

 

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Author Biographies

  • Jaqueline Jamara Souza Soares, IPEN - Nuclear and Energy Research Institute
    Center for Radiation Technology - CTR (IPEN)
  • Raynara Maria Silva Jacovone, IPEN - Nuclear and Energy Research Institute
    Center for Radiation Technology - CTR (IPEN)
  • Paulo SOUZA Santos, IPEN - Nuclear and Energy Research Institute
    Center for Radiation Technology - CTR (IPEN)
  • Márcio Henrique Zaim, University of São Paulo
    Institute of Chemistry
  • Dalva Lucia Araújo Faria, University of São Paulo
    Institute of Chemistry
  • Solange Kazumi Sakata, IPEN - Nuclear and Energy Research Institute
    Center for Radiation Technology - CTR (IPEN)

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Published

2019-07-04

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Section

Articles

How to Cite

The effect of gamma radiation on the structure of graphene oxide and graphene oxide functionalized with amino-PEG. Brazilian Journal of Radiation Sciences, Rio de Janeiro, Brazil, v. 7, n. 3, 2019. DOI: 10.15392/bjrs.v7i3.837. Disponível em: https://www.bjrs.org.br/revista/index.php/REVISTA/article/view/837.. Acesso em: 29 mar. 2024.

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