title: Strain Sensing Characteristics of Rubbery Carbon Nanotube Composite for Flexible Sensors.
abstract: In this study, the piezoresistive properties of CNT (Carbon Nanotube)/EPDM composite are characterized for the applications of a flexible sensor. The CNT/EPDM composites were prepared by using a Brabender mixer with MWCNT (Multi-walled Carbon Nanotube) and organoclay. The static and quasi-dynamic voltage output responses of the composite sensor were also experimentally studied and were compared with those of a conventional foil strain gage. The voltage output by using a signal processing system was fairly stable and it shows somehow linear responses at both of loading and unloading cases with hysteresis. The voltage output was distorted under a quasi-dynamic test due to its unsymmetrical piezoresistive characteristics. The CNT/EPDM sensor showed quite tardy response to its settling time test under static deflections and that would be a hurdle for its real time applications. Furthermore, since the CNT/EPDM sensor does not have directional voltage output to tension and compression, it only could be utilized as a mono-directional force sensor such as a compressive touch sensor.
authors.forename: Gyong Rak
authors.initials: GR
authors.lastname: Choi
authors.forename: Hyung-ki
authors.initials: HK
authors.lastname: Park
authors.forename: Hoon
authors.initials: H
authors.lastname: Huh
authors.forename: Young-Ju
authors.initials: YJ
authors.lastname: Kim
authors.forename: Heon
authors.initials: H
authors.lastname: Ham
authors.forename: Hyoun Woo
authors.initials: HW
authors.lastname: Kim
authors.forename: Kwon Taek
authors.initials: KT
authors.lastname: Lim
authors.forename: Sung Yong
authors.initials: SY
authors.lastname: Kim
authors.forename: Inpil
authors.initials: I
authors.lastname: Kang