Effect of gamma irradiation on dispersion of GO in PVA/GO nanocomposites
Paper ID : 1312-UFGNSM-FULL
Authors:
Masoud Frounchi *1, Susan Dadbin2, Mehrdad Tabatabaei3
1Department of Chemical & Petroleum Eng., Sharif University of Technology
22- Radiation Applications Research School, Nuclear Sci. & and Tech. Research Institute, Tehran, Iran.
3Department of Chemical and Petroleum Eng., Sharif University of Technology, Tehran, Iran
Abstract:
Poly (vinyl alcohol) / graphene oxide (PVA/GO) nanocomposites were made through solution casting method. Graphene oxide was irradiated by gamma rays at 35 kGy in 50/50 ethanol -water solution and then added to poly (vinyl alcohol) aqueous solution in various graphene oxide concentrations (0.3, 0.7, 1 wt.%) and sonicated until a uniformly dispersed suspension was obtained. The resulted PVA/GO suspensions were cast into thin films. The nanocomposite films were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM) and mechanical tests. The XRD analysis exhibited characteristic peaks of graphene oxide. It was observed that graphene oxide uniformly dispersed within poly (vinyl alcohol) indicating strong interfacial interactions through forming hydrogen bonds between hydroxyl groups of poly (vinyl alcohol) and oxygen containing groups on the gamma ray-modified surface of graphene oxide . Tensile modulus and tensile strength of the films improved markedly over the neat poly (vinyl alcohol) film.
Keywords:
Graphene oxide, poly (vinyl alcohol), nanocomposite, Gamma irradiation
Status : Paper Accepted (Poster Presentation)