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http://dx.doi.org/10.14478/ace.2022.1016

The Electrochemical Characterization of Conducting Polymer-Lignin Composite  

Bae, Joonwon (Department of Applied Chemistry, Dongduk Women's University)
Publication Information
Applied Chemistry for Engineering / v.33, no.2, 2022 , pp. 210-215 More about this Journal
Abstract
Two types of lignin materials with a different surface ionic character were used and polypyrrole layer was introduced on the lignin surface to obtain polypyrrole@lignin and polypyrrole@lignosulfonate composites using a simple chemical oxidation polymerization, reported in a previous article. Polypyrrole was effectively prepared regardless of the lignin type and the resulting composites were investigated using scanning electron microscope (SEM), cyclic voltammetry (CV), and impedance analysis. SEM and CV results showed that the obtained composites retained stable electrochemical properties after introduction of polypyrrole on the lignin surface. Impedance analyses showed that the surface properties of composites were dependent on lignin characteristics. In addition, the composites were embedded in agarose, an gelifying agent, to obtain conductive gels. It was found that the conductive gels possessed an electrical conductivity and also retained stable electrochemical properties, which indicated that the conductive gels might be useful for some applications.
Keywords
Lignin; Polypyrrole; Conductive gel; Lignosulfonate; Electrochemical analysis;
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