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http://dx.doi.org/10.7234/kscm.2010.23.3.031

Variations in Electrical Conductivity of CNF/PPy Films with the Ratio of CNF and Application to a Bending Sensor  

Kim, Cheol (경북대학교 기계공학부)
Zhang, Shuai (경북대학교 기계공학과 대학원)
Kim, Seon-Myeong (경북대학교 기계공학과 대학원)
Publication Information
Composites Research / v.23, no.3, 2010 , pp. 31-36 More about this Journal
Abstract
A new material, carbon-nanofiber/polypyrrole (CNF/PPy) composite films, with different CNF weight ratios were fabricated electrochemically. Compared to the fabrication process based on simple physical mixing, the flexibility of the new film has been improved much better than the previous similar material. Pure PPy films were also fabricated by the new electrochemical process for the comparison of difference. Several SEM images were taken at two locations (electrode-side and solution-side) and at the cross section of the samples. Electrical conductivity of the composite films was measured by the four-probe method. The conductivity of the pure PPy film 0.013cm thick was 79.33S/cm. The CNF/PPy composite film with 5% CNF showed a conductivity of 93S/cm. One with 10% CNF showed a conductivity of 126 S/cm. The conductivity of PPy improves, as the CNF weight ratio increases. The good conductivity of CNF/PPy composites makes them a candidate for a small bending actuator. A bending sensor consists of PPy and PVDF, which can be operated in the air, was designed and the bending deflection was calculated using FEM.
Keywords
Carbon nanofiber; Polypyrrole; Electrical conductivity; Nanocomposites; Bending sensor;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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