期刊
SENSORS
卷 18, 期 9, 页码 -出版社
MDPI
DOI: 10.3390/s18093126
关键词
ionic electroactive polymer actuators; graphene; silver nanowires; poly(3,4-ethylenedioxythiophene):polystyrene sulfonate; nanocomposite electrode
资金
- Defense Acquisition Program Administration
- Agency for Defense Development [UD130070ID]
- Basic Science Research Program through the National Research Foundation of Korea(NRF) - Ministry of Education [NRF-2016R1D1A1B01011724]
- National Research Foundation of Korea [21A20130011089] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Ionic electroactive polymer (IEAP) actuators that are driven by electrical stimuli have been widely investigated for use in practical applications. However, conventional electrodes in IEAP actuators have a serious drawback of poor durability under long-term actuation in open air, mainly because of leakage of the inner electrolyte and hydrated cations through surface cracks on the metallic electrodes. To overcome this problem, a top priority is developing new high-performance ionic polymer actuators with graphene electrodes that have superior mechanical, electrical conductivity, and electromechanical properties. However, the task is made difficultby issues such as the low electrical conductivity of graphene (G). The percolation network of silver nanowires (Ag-NWs) is believed to enhance the conductivity of graphene, while poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS), which exhibits excellent stability under ambient conditions, is expected to improve the actuation performance of IEAP actuators. In this study, we developed a very fast, stable, and durable IEAP actuator by employing electrodes made of a nanocomposite comprising PEDOT:PSS and graphene-Ag-NWs (P/(G-Ag)). The cost-effective P/(G-Ag) electrodes with high electrical conductivity displayed a smooth surface resulting from the PEDOT:PSS coating, which prevented oxidation of the surface upon exposure to air, and showedstrong bonding between the ionic polymer and the electrode surface. More interestingly, the proposed IEAP actuator based on the P/G-Ag electrode can be used in active biomedical devices, biomimetic robots, wearable electronics, and flexible soft electronics.
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