J044061 金属表面処理を施したカーボンナノフイラーからなる高感度ひずみセンサ([J04406]知的材料・構造システム(6))

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This paper experimentally investigates the piezoresistive behavior of a nanocomposite strain sensor. This sensor is fabricated from epoxy based nanocomposite films by using metallic-coated MWNT (Multi-walled carbon nanotube) and metallic-coated VGCF (Vapor grown carbon fiber) as fillers, where two typical metals are used, i.e., Ni or Cu, as coating material. The piezoresistivity of the sensor is inversely proportional to its filler loading. Furthermore, the sensitivity of the sensors using metallic-coated nanofillers is much higher than those of a conventional strain gage and a strain sensor using pristine nanofillers. The main factor for this phenomenon is that, relatively modest aggregates of nanofillers coated by metals are liable to be formed in the nanocomposites. Therefore, there is a coarse conductive network formed by the nanofillers in epoxy matrix. Another possible factor may be the higher conductivity of the nanofillers coated by metals. These two factors result in a much higher sensitivity of the strain sensor using metallic -coated nanofillers.
一般社団法人日本機械学会の論文
2011-09-11