Pirolün Asetonitril Çözeltisinde, Piridin Karboksilik Asitlerin Varlığında, Elektrokimyasal Polimerizasyonu ve Elde Edilen Polipirol Filmlerinin Karakterizasyonu

Abstract

Polyprol, which is one of the most studied conductive polymers, can be easily obtained by chemical or electrochemical methods in aqueous and anhydrous solutions by oxidation of the pyrrole monomer. With a suitable method for obtaining polypyrrole by electrochemical polymerization; Polymerization is initiated by raising the pyrrole monomer with constant current or potential swepping and forming the pyrole radical.

For the first time in this study, the electropolymerization of the polypyrrole was carried out in the presence of pyridine carboxylic acid derivatives. For this purpose, nicotinic acid, picolinic acid, quinaldic acid, isonicotinic acid, 2.4 pyridindicarboxylic acid, 2.5 pyridindicarboxylic acid, 2.6 pyridindicarboxylic acid, 3.4 pyridindicarboxylic acid and 3.5 pyridindicarboxylic acid were used.

First of all, suitable polymerization conditions were determined by cyclic voltammetry technique (potentiodynamics). The polymerization was carried out in the acetonitrile solution in the presence of TBABF4 support electrolyte, at different voltage ranges, at different pyrrole concentrations, and by trying different concentrations of each pyridine carboxylic acid derivative. The polymerization solution was prepared by adding 1% water except acetonitrile and TBABF4 support electrolyte. Polypyrrole was obtained by adding Cu (I) ions in different concentrations to the polymerization solution prepared under the same conditions. The effects of the pyridine carboxylic acid derivatives and the Cu (I) ion used on the changes in the film thickness and conductivity properties of the inhibition and additive events on the formation of polypyrrole were investigated.

Electrochemical behaviors of polymers with different properties obtained by alternating voltammetry method were investigated. Characterization of polypyrole films obtained in the presence of pyridine carboxylic acid, Scanning Electron Microscopy (SEM), Energy Dispersive X-Rays Spectroscopy (EDX), X Rays Photoelectron Spectroscopy (XPS), Four-Probe Conductivity Measurement Method, Raman Spectroscopy, EIS (Electrochemical Impedance Spectroscopy) and Li battery was made using charge discharge tests as cathode material.