Preparation, Stability and Local Piezoelectrical Properties of P(VDF-TrFE)/Graphene Oxide Composite Fibers

Abstract

The unprecedented attributes such as biocompatibility and flexibility of macromolecular piezoelectric polymer has triggered an immense interested in scientific society for their potential exploitation in implantable electronic devices. In the present article, a theoretical and experimental investigation is done to explore the polarization behavior of composite fibers based on copolymer poly-trifluoroethylene P(VDF-TrFE) and graphene oxide (GO) with varying composition of the components is explored for its possible application in bioelectronic devices. Electromechanical properties of the PVDF/GO nanofibers were investigated using piezoresponse force microscopy (PFM) method. The switching behavior, charge states, and piezoelectric response of the fibers were found to depend on the concentration of GO up to 20%. Theoretical models of PVDF chains, interacting with Graphene/GO layers has been used to explore the evolution of piezoresponse in the composite fibers. In order to compute piezoelectric coefficients, the behavior of composite in electrical fields has been modeled using software HyperChem. The experimental results are qualitatively correlated with a computed theoretical model.

Current and future applications of PVDF-carbon nanomaterials in energy and sensing

“…Xu et al [296] studied PVDF/(γ-oxo-pyrenebutyric acid)-modified graphene and BaTiO3 reporting the improvement of dielectric constant and this effect was not only caused by high dielectric constant of BaTiO3 but also by polarization of the nanofillers. Zhou et al [118] reported BaTiO3@carbon nanoparticle-enabled P(VDF-TrFE) composites for the application in PENGs (GO -P(VDF-TrFE) composite fibers were also studied [297]). Also, rGO-PVDF-TrFE materials emerged as very interesting wearable energy generators (WNGs) [93] -Fig.…”

Graphene and Nanoclay as Processing Aid Agents: A Study on Rheological Behavior in Polystyrene

“…To our knowledge, graphene is not commonly used in molten polymers as a processing aid agent or lubricant, but it could be an interesting candidate given its tribological properties [15]. In addition, it would complement the unique combination of functionalities of graphene, such as high mechanical strength, electrical conductivity [16][17][18], UV resistance [19], piezoelectric response enhancement [20], as well as the valorization of recycled plastics and mixed plastic waste streams [21,22]. Furthermore, recent toxicity studies performed on few-layer graphene industrial grades produced by the mechanochemical exfoliation of graphite have much lower health and safety concerns than other nanocarbons such carbon nanotube and carbon black [23].…”