Journal
SMART MATERIALS AND STRUCTURES
Volume 29, Issue 3, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-665X/ab6882
Keywords
ionic electroactive polymer; rapid deformation; ionic liquid (IL); ionic polymer carbon composite(IPCC); ionic polymer-metal composites (IPMC); high impulse voltage
Funding
- National Natural Science Foundation of China (NNSFC) [11802223]
- China Postdoctoral Science Foundation [2017M613113]
- Fundamental Research Funds for the Central Universities
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Slow deformation is an issue that restrains engineering applications of ionic electroactive polymers (EAP). The application of a high impulse voltage has been proposed to accelerate the deformation of water based ionic polymer-metal composites (IPMC). In this paper, focused on ionic liquid (IL) based ionic EAPs, ionic polymer carbon composites (IPCC), IL-IPMC, ionic and capacitive laminates, and bucky gel actuators were selected to verify the effectiveness of the high impulse voltage method. All four were able to be accelerated more than tenfold under high impulse voltages. To investigate the limitations of the high impulse voltage method, constant pulse width measurements were performed on IPCC and IL-IPMC. The deformation speed was almost linear with the pulse amplitude before it reached the maximum deformation. On setting a constant pulse width, a large deformation and a higher speed could be obtained by increasing the pulse amplitude. Additionally, by fixing the pulse amplitude, extending the pulse width induced a larger deformation at a certain speed. Finally, the consumption power and heat issues were investigated via cycling tests. A shorter cycle time (higher frequency) and a higher pulse amplitude led to larger power consumption and higher temperature. The ionic EAPs damaged at high temperature (usually over 100 degrees C), which is probably due to the positive feedback between Joule heating and ion mobility. In addition to the pulse width, the pulse frequency and amplitude require carefully control when using a high impulse voltage.
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