Abstract
The article discusses the features of electrochemical synthesis and behavior of polyaniline and polyaniline based composites doped by electroactive anions (EAA). It has been found that in some cases electroactive anion forms complex with the aniline molecule in electrolyte, which performs as initiator of polymerization. This provides acceleration of the initial stage of aniline electropolymerization. As a result, it becomes possible to prepare high-quality corrosion resistant polyaniline coatings on non-noble metal electrodes. The composites based on polyaniline and nanocarbon materials (carbon nanotubes, graphene oxide) have been prepared, which are promising for use in supercapacitors. Using EAA we developed electrochemical sensors to hydrogen and total content of antioxidants in food.
Highlights
IntroductionVarious electroactive polymers have been intensely investigated over the two past decades; polyaniline (PANI) is one of the most analyzed polymers
The role of anions in the formation of spatial structure of polymer matricesVarious electroactive polymers have been intensely investigated over the two past decades; polyaniline (PANI) is one of the most analyzed polymers
We suggested that material based on PANI and Carbon nanotubes (CNT) should be used as support [101,102]
Summary
Various electroactive polymers have been intensely investigated over the two past decades; polyaniline (PANI) is one of the most analyzed polymers. It was found that the type of anion defines morphology of PANI and stimulates formation of either compact (HBF4, HClO4, CF3COOH – the 1st class) or loose (H2SO4, HNO3, HCl – the 2nd class) polymer structure [6]. It is reported in [7, 8] that albeit weaker, to anions, alkali metal cations affect electropolymerization rate and properties of PANI with the effect decreasing in the row: ps+rK+>Li+ >Na+. Anion migration from polymer can be lowered due to anions capable of forming chemical and coordination bonds with the PANI matrix, saving the polymer matrix
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