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송대석,조화연,Bye Ri Yoon,조재영,박종혁 한국고분자학회 2017 Macromolecular Research Vol.25 No.2
To develop air-operating conducting polymer (CP) actuators with enhanced performance, polymer electrolyte membranes with high ionic conductivity and mechanical endurance are necessary. Poly(ethylene oxide) oligomers penetrate into porous poly(vinylidene fluoride) membranes and sequentially undergo crosslinking to produce polymer electrolyte membranes. The properties of the electrolyte membranes are regulated by varying the degree of crosslinking. Polypyrrole layers are constructed on the surfaces of the membranes by chemical polymerization, creating CP actuators. CP actuators based on the resulting polymer electrolyte membranes operate properly in air and show highly enhanced performance such as a large displacement and long operation time. This approach, therefore, has great potential to extend the applications of CP actuators.
Fabrication and Characterization of an Ionic Polymer-Metal Composite Bending Sensor
송대석,한동균,이계한,김동민,조재영 한국고분자학회 2017 Macromolecular Research Vol.25 No.12
A bending sensor was fabricated with ionic polymer-metal composite (IPMC) and its characteristics as a sensor was studied. The IPMC senor, made by stacking a few Nafion films and water-proofed by Parylene coating, was robust and stable enough to be operated over 5 h in the air. Through the experiments examining the relation between the sensor signal and the deformation of the sensor, the output voltage of the sensor appeared to be linearly proportional to the curvature of the sensor. The proportional relation was maintained in the more realistic conditions like when the sensor is surface-mounted on the static and dynamic fingerjoint. The sensor signal was not affected by the sensor size change in length, width and thickness within the range we tested. Through the reliability tests the IPMC sensor was characterized to be inferior to mechanical sensors in accuracy and precision, and superior in sensitivity and resolution.