Synthesis of Graphene Oxide Grafted with Epoxidized Natural Rubber via Aminosilane Linkage

Abstract:

Graphene oxide was synthesized from graphite by Hummer method and connected with (3-aminopropyl) triethoxysilane to form graphene oxide-aminosilane (GO-Si) linkage. The solution was centrifuged and washed with acetone to remove unreacted aminosilane before grafting with epoxidized natural rubber (ENR). ENR dissolved in toluene solution was mixed with GO-Si particle and dried at room temperature. Then, it was grafted to form graphene oxide grated with ENR via aminosilane linkage (GO-Si-ENR) by heat treatment. GO-Si-ENR was washed in toluene to remove unconnected ENR molecule. The synthesized GO particle in each step was characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The possible reaction mechanism was proposed in this research. The aim of this synthesis is to improve natural rubber - graphene interfacial interaction thus the dispersion of GO and GO-Si-ENR particle in natural rubber matrix by solvent mixing process was observed by transmission electron microscopy (TEM).

• Periodical: Materials Science Forum (Volume 940)
• Pages: 28-34
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.940.28
• Online since: December 2018
• Authors: Pollawat Charoeythornkhajhornchai*, Anongnat Somwangthanaroj
• Keywords: Aminosilane, Epoxidized Natural Rubber, Graphene Oxide, Natural Rubber

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