Conducting polymers are important for a wide range of industries and scientific applications (e.g., batteries, sensors, capacitors, etc.) owing to their electronic and electrical properties. Polyaniline (PANI) is one of them and has been studied during the past years because of its capability to easily adjusting its oxidation and protonation degrees, as well as environmental stability and economic feasibility. PANI can be produced as a film or powder by using chemical and electrochemical methods, although its processability using other techniques is low because of its high melting point and low viscosity in solution. Thus, Graphene Oxide (GO) can be added to the mixture as a thixotropic agent, however it has the tendency to agglomerate because of its high surface area and energy. To solve this problem, Poly (9-vinylcarbazole) (PVK) can be incorporated into the mixture. Both GO and PVK will contribute to the conductive properties of the final material. Therefore, the combination of PANI/PVK/GO offers the opportunity to prepare a printable ink for the 3D-printing process by using the Direct Ink Writing (DIW) technique. This study aims to 3D-print PANI composites with potential capacitor applications. To test the electrochemical properties of the composites, Cyclic voltammetry (CV) and Galvanostatic EIS will be performed; and to characterize it, a rheological test, Fourier Transform infrared (FTIR), and Scanning Electron Microscope (SEM) techniques are proposed.

Fabrication of high-conductive polyaniline composites by the 3D-printing process with potential application as a capacitor

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