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

Jaqueline Jamara Souza Soares; Raynara Maria Silva Jacovone; Paulo SOUZA Santos; Márcio Henrique Zaim; Dalva Lucia Araújo Faria; Solange Kazumi Sakata

doi:10.15392/bjrs.v7i3.837

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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