| 초록 |
Recently, there are demands for highly active sensors, flexible and miniaturized actuators in many fields such as medical equipments and micro-robots [1,2]. Because of these requirements, polymer gel, ionic polymer metal composite (IPMC) and conducting polymer have been discussed in the point of various types such as sensors and actuators. IPMC had larger deformation at low voltage than other polymers, but it has some problems. The deformation of IPMC was affected by several factors such as the hydrated sphere around moving cations inside nafion electrolyte and the interfacial area between the electrodes and polymer electrolyte[3]. Investigation of counter-cation effects on the performance of IPMC actuation indicated that the hydration process is more important than electrostatic field interaction and IPMC having lithium ion showed a greater displacement and force density per volt. Although the lithium ion has the smallest crystal radius, the effective radius of the charged particle is greater than K+, Na+, etc., because of the solvation and the migration of hydrated lithium ions under electric field induces larger deformation. This work is intended to prepare a large surface nafion-metal composite actuator with a replication technique and to investigate the effect of the increase of electrode/electrolyte interfacial area on deformation.
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