POLYVINYL CHLORIDE BASED CARBON PASTE FOR SCREEN PRINTING OF ELECTRODES

This paper describes various compositions of electrically conductive pastes based on polyvinyl chloride, which are suitable for screen printing technology. These pastes are composite systems consisting of finely dispersed particles of a conductive filler, specifically various carbon modifications. These carbon particles are uniformly dispersed within a polymer binder. Electrically conductive carbon pastes therefore consist of three main components: the conductive carbon filler, the polymer binder, and a solvent. Other modifying or stabilizing additives can also be used in the paste, depending on the specific application. The paper investigates the optimal ratio of these components in pastes, specifically between the selected polymer binder (polyvinyl chloride) and the total amount of carbon fillers (graphite and carbon black). This allows to obtaine relatively high-quality electrodes with low electrical resistance. To further search of the minimum possible electrical resistivity value at the selected polyvinyl chloride concentration, an additional set of experiments was conducted with varying ratios of both carbon fillers. The results of a comparative analysis of the surface of the manufactured electrodes using scanning electron microscopy are presented, showing the difference in coating quality based on the composition. It is demonstrated that, in order to meet the required objectives, it is possible to produce electrically conductive carbon pastes with specific properties. Factors that lead to defects affecting both the screen printing process and final printed products are discussed. A unique graph illustrating the correlation between the possibility of screen printing the developed electrically conductive carbon paste and the final electrical resistivity values of the electrodes based on them is provided. For citation: Gryaznova M.I., Lugvishchuk D.S., Karaeva A.R., Mordkovich V.Z. Polyvinyl chloride based carbon paste for screen printing of electrodes. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2024. V. 67. N 10. P. 99-104. DOI: 10.6060/ivkkt.20246710.3y.