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High-cycle electromechanical aging of dielectric elastomer actuators with carbon-based electrodes

We present high-cycle aging tests of dielectric elastomer actuators (DEAs) based on silicone elastomers, reporting on the time-evolution of actuation strain and of electrode resistance over millions of cycles. We compare several types of carbon-based electrodes, and for the first time show how the c... Full description

Kongresse: International Conference on Electromechanically Active Polymer (EAP) Transducers & Artificial Muscles 7 2017.06.06-2017.06.07 Cartagena, ES
EuroEAP 7 2017.06.06-2017.06.07 Cartagena, ES
International Conference on Electromechanically Active Polymer (EAP) Transducers & Artificial Muscles 7th 2017.06.06-2017.06.07 Cartagena, ES
EuroEAP 2017 2017.06.06-2017.06.07 Cartagena, ES
Progress in Electromechanically Active Polymers 2017.06.06-2017.06.07 Cartagena, ES
Contained in: Smart Materials and Structures Vol. 27, No. 7 (2018), p. 074002/1-10
Fulltext access:
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Links: Additional Link (dx.doi.org)
ISSN: 1361-665X
Additional Keywords: BEDRUCKEN
CARBONYLPULVER
DIELEKTRISCHER-STOFF
ELASTOMER
FEHLERQUELLE
KOHLEELEKTRODE
MEMBRAN
SCHWINGUNGSZAHL
SILICON:POLYMER
SILICONKAUTSCHUK
STEMPELEINDRUCK
TINTENSTRAHLDRUCK
VERBUNDWERKSTOFF
DOI: 10.1088/1361-665X/aa9f45
Notes: Copyright: Metadaten: TEMA, Copyright WTI-Frankfurt eG
Copyright: (C) Alle Rechte beim Herausgeber
Physical Description: 10 Seiten, 34 Quellen
ID (e.g. DOI, URN): 10.1088/1361-665X/aa9f45
PPN (Catalogue-ID): WTI060286474
Note: WTI TEMA DB
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520 |a We present high-cycle aging tests of dielectric elastomer actuators (DEAs) based on silicone elastomers, reporting on the time-evolution of actuation strain and of electrode resistance over millions of cycles. We compare several types of carbon-based electrodes, and for the first time show how the choice of electrode has a dramatic influence on DEA aging. An expanding circle DEA configuration is used, consisting of a commercial silicone membrane with the following electrodes: commercial carbon grease applied manually, solvent-diluted carbon grease applied by stamping (pad printing), loose carbon black powder applied manually, carbon black powder suspension applied by inkjet-printing, and conductive silicone-carbon composite applied by stamping. The silicone-based DEAs with manually applied carbon grease electrodes show the shortest lifetime of less than 105 cycles at 5% strain, while the inkjet-printed carbon powder and the stamped silicone-carbon composite make for the most reliable devices, with lifetimes greater than 107 cycles at 5% strain. These results are valid for the specific dielectric and electrode configurations that were tested: using other dielectrics or electrode formulations would lead to different lifetimes and failure modes. We find that aging (as seen in the change in resistance and in actuation strain versus cycle number) is independent of the actuation frequency from 10 Hz to 200 Hz, and depends on the total accumulated time the DEA spends in an actuated state. [Copyright IOP Institute of Physics Publishing. Reproduced with permission.] 
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