27 March 2018 Solvent change in polymerization influence linear actuation of polypyrrole carbide-derived carbon films
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Abstract
For actuator applications, conducting polymers are typically deposited at lower temperatures e.g. -20°C, in order to obtain more regular, smooth and ordered films with fewer defects. Clearly, standard aqueous electrolyte solutions cannot be used at these temperatures, and some organic solvents cannot be used, as not all salts are soluble in these. A wellknown approach is to use ethylene glycol: water mixtures (often 50:50 wt%, PPy/CDC(EG:W). The goal of this work is to analyze the role of water in the solution: to compare the linear actuation properties of conducting polymer hybrid films PPy/CDC(EG) polymerized from just ethylene glycol solution and that with 50% water, both at -20°C. Cyclic voltammetry and chronoamperometric electro-chemo-mechanical-deformation (ECMD) measurements were performed to study the linear actuation properties in lithium bis(trifluoromethylsulfonyl)imide in aqueous solution (LiTFSI-aq). Both conductivity and linear actuation strain were found dependent on the solvent in the polymerization solution with ethylene glycol: water the clearly superior solvent choice.
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Zane Zondaka, Zane Zondaka, Tarmo Tamm, Tarmo Tamm, Alvo Aabloo, Alvo Aabloo, Rudolf Kiefer, Rudolf Kiefer, } "Solvent change in polymerization influence linear actuation of polypyrrole carbide-derived carbon films ", Proc. SPIE 10594, Electroactive Polymer Actuators and Devices (EAPAD) XX, 105942H (27 March 2018); doi: 10.1117/12.2300146; https://doi.org/10.1117/12.2300146
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