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Influence of solvent on linear polypyrrole–polyethylene oxide actuators
Author(s) -
Khadka Roshan,
Zondaka Zane,
Kesküla Arko,
Khorram Mahdi Safaei,
Khanh Tran Thien,
Tamm Tarmo,
TravasSejdic Jadranka,
Kiefer Rudolf
Publication year - 2018
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.46831
Subject(s) - propylene carbonate , electrolyte , materials science , polypyrrole , ionic conductivity , dielectric spectroscopy , conductivity , chemical engineering , lithium (medication) , electrochemistry , polymer chemistry , polymer , composite material , chemistry , electrode , medicine , engineering , polymerization , endocrinology
Ionic conductivity of polypyrrole (PPy) doped with dodecylbenzenesulfonate (DBS) was improved by loading of 10 wt % of polyethylene oxide (PEO). The linear actuation properties of PPy–PEO/DBS films were investigated and compared in polar (aqueous) and aprotic (propylene carbonate) solvents keeping the concentration of lithium bis(trifluoromethane)sulfonimide (LiTFSI) electrolyte the same. The results were compared to those of pristine PPy/DBS films. The actuation direction changed from pure cation‐driven in the aqueous electrolyte (LiTFSI(aq)) to anion‐driven in propylene carbonate electrolyte (LiTFSI(PC)). At the same time, the electro‐chemo‐mechanical deformation revealed that the strain of PPy–PEO/DBS increased from 5% in LiTFSI(aq) to 20% in LiTFSI(PC). The effect of solvent on the ionic conductivity was investigated using electrochemical impedance spectroscopy, showing a 27% increase in charge transfer kinetics and an increase in the electronic conductivity, resulting in significant increase in the strain rate, when propylene carbonate electrolyte was used. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46831.