Polypyrrole coatings on gelatin fiber scaffolds: Material and electrochemical characterizations in organic and aqueous electrolyte

•Chemical polymerized polypyrrole on glycose-crosslinked gelatin fiber scaffold (CFS).•Conductivity of CFS found high in range of 0.35S/cm.•CFS revealing high specific capacitance of 175Fg−1 in aqueous electrolyte. Polypyrrole (PPy) was chemically deposited on glycose-crosslinked gelatin fiber scaff...

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Bibliographic Details
Published in:Synthetic metals 2017-10, Vol.232, p.25-30
Main Authors: Harjo, Madis, Kesküla, Arko, Leemets, Kaur, Khorram, Mahdi Safaei, Saar, Rando, Järvekülg, Martin, Tamm, Tarmo, Kiefer, Rudolf
Format: Article
Language:English
Subjects:
Aqueous and propylene carbonate solvent
Aqueous electrolytes
Aqueous solutions
Charge exchange
Crosslinking
Electrochemical analysis
Electrolytes
Electron microscopy
Energy storage
Glycose-gelatin conductive fiber scaffold
Immersion coating
LiTFSI
Lithium
Mechanical properties
PPy chemically
Propylene
Scaffolds
Specific capacitance
Tissue engineering
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Summary:•Chemical polymerized polypyrrole on glycose-crosslinked gelatin fiber scaffold (CFS).•Conductivity of CFS found high in range of 0.35S/cm.•CFS revealing high specific capacitance of 175Fg−1 in aqueous electrolyte. Polypyrrole (PPy) was chemically deposited on glycose-crosslinked gelatin fiber scaffold (FS) by simple dip coating technique, resulting in conductive fiber scaffolds (CFS). The CFS samples were comparatively studied in aqueous and propylene carbonate solutions of equal concentrations of lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) electrolyte. Our aim in this work was to characterize the mechanical and electrochemical properties of the CFS samples. The new CFS material was characterized by scanning electron microscopy (SEM) and FTIR measurements confirming chemical oxidized PPy deposits on FS. The electrochemical measurements applying cyclic voltammetric, chronoamperometric and chronopotentiometric measurements showed that while diffusion coefficients for both solvents were in similar range, the exchanged charge was nearly doubled in aqueous solutions. The specific capacitance of the CFS had the highest value in aqueous electrolyte reaching 175Fg−1, which suggests that in addition to smart tissue engineering, this novel CFS material could also find application in energy storage.
ISSN:0379-6779
1879-3290
DOI:10.1016/j.synthmet.2017.07.014