Preparation of PVA nanofibers reinforced with magnetic graphene by electrospinning method and investigation of their degradation kinetics using master plot analyses on solid state

In this study, magnetic graphene nanoparticles have been prepared by Hummers method. The synthesized magnetic graphene nanoparticles were applied in the preparation of polyvinyl alcohol/magnetic graphene (PVA/Fe₃O₄/G) nanofibers by the electrospinning process. The prepared nanoparticles and nanofibers were characterized using the scanning electron microscopy (SEM), X-ray diffraction and Fourier Transform Infrared Spectroscopy. SEM measurements showed that addition of magnetic graphene to the solution of PVA decreases the diameter of fibers. The degradation kinetics of nanofibers was studied by thermogravimetric (TG) and differential thermogravimetric. TG results showed that the nanoparticles improve the thermal stability of the nanofibers. The activation energy was calculated by Vyazovkin method. Master plots are employed for the determination of the reaction models for solid-state reactions. The investigations showed that the experimental master curves are in better agreement with the theoretical master curve corresponding to the F1 mechanism.