Functionalized graphene oxide with different isocyanate based chemicals

The aim of this study was the surface modification of the graphene oxide with aliphatic polyisocyanate (PI) and aromatic toluene diisocyanate (TDI) chemicals in order to achieve hydrophobic surface nature. The surface modification was done in a three neck reactor at 45 ⁰C for 24 hrs under nitrogen atmosphere. The amount of isociyanats grafted on the surface of GO was investigated by the X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and thermal gravimetric analysis (TGA). Results showed that both polyisocyanate and toluene diisocyanate were successfully grafted on the surface of graphene oxide through forming covalent bonds. The surface nature of the graphene oxide was changed from hydrophilic to hydrophobic after modification. The PI formed thicker layer on the surface of GO than TDI

کلیدواژه ها:

Graphene oxide ، surface modification ، polyisocyanate ، diisocyanate