Influence of treatment with hydrazine and subsequent annealing on the composition and thermophysical properties of polytetrafluoroethylene-graphene oxide composite aerogel

The composition and thermophysical properties of the composite aerogel of polytetrafluoroethylene with graphene oxide (PTFE-GO) before and after reduction with hydrazine vapour were investigated using X-ray photoelectron spectroscopy (XPS), thermogravimetry (TG), and differential scanning calorimetry (DSC). The reduction and subsequent heating at 370 degrees C, it was shown, increases the surface fluorine concentration and the thermal stability of the aerogel. The reduced sample has no weight loss associated with the pyrolysis of oxygen-containing functional groups in the temperature range from 95 to 230 degrees C. Nevertheless, the destruction of the polymer component even in the reduced aerogel begins at 400 degrees C, which is much lower than the temperature at the onset of thermal decomposition of bulk PTFE.

Automated summary

The composition and thermophysical properties of the composite aerogel of polytetrafluoroethylene with graphene oxide (PTFE-GO) before and after reduction with hydrazine vapour were investigated using X-ray photoelectron spectroscopy (XPS), thermogravimetry (TG), and differential scanning calorimetry (DSC). The reduction and subsequent heating at 370 degrees C, it was shown, increases the surface fluorine concentration and the thermal stability of the aerogel.