Abstract
Graphene oxide as a derivative of graphite has been noticed as a high efficient material and its application in nanocomposite coatings is surprisingly increased. In this research, surface modification of graphene oxide using 3-aminopropyltriethoxysilane, as an aminic modifier, was done. Coating compositions based on polydimethylsiloxane containing graphene oxide and also modified graphene oxide were formulated and interaction of graphene oxide derivatives with siloxane polymer was evaluated using Fourier transform infrared spectroscopy – attenuated total reflectance, scanning electron microscopy, Atomic Force Microscopy, Raman spectroscopy and X-Ray Diffraction methods. Also thermogravimetric analysis and water contact angle tests were used for evaluation of thermal properties and hydrophobicity of resultant coatings, respectively. Results confirmed the interaction of graphene oxide with aminic modifier. Also, the presence of modified graphene oxide derivatives in the formulations led to the increase of thermal properties and hydrophobicity of the resultant coatings and the increase of these properties for formulations containing modified graphene was much greater and more pronounced.
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