Strain and temperature response of Multiwalled Carbon Nanotube (MWCNT/CNT) yarns on a stainless steel test beam has been studied. The carbon nanotube yarns are spun from a multiwalled carbon nanotube forest grown on a silicon substrate to a 4-ply yarn with a diameter of about 15-20 micron. Four of the 4-ply CNT yarns are arranged in a Wheatstone bridge configuration on the stainless steel test beam using a thin layer of polyurethane resin that insulates and protects the yarns from the test beam. Strain sensitivities of the CNT yarn sensors range from 1.39 to 1.75 mV/V/1000 mystrain at room temperature, and temperature sensitivity of the CNT yarn bridge is 91 myA/deg C. Resistance of the yarns range from 215 to 270 ohms for CNT yarn length of approximately 5 mm. Processes used in attaching the CNT yarns on the test beam and experimental procedures used for the measurements are described. Conventional metallic foil strain gauges are attached to the test beam to compare with the CNT sensors. The study demonstrates multifunctional capability of the sensor for strain and temperature measurements and shows its applicability where engineering strain is less than 2%.


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    Title :

    Strain and temperature sensing properties of multiwalled carbon nanotube yarn composites


    Additional title:

    Spannungs- und temperaturabhängige Eigenschaften von Mehrlagen-Kohlenstoff-Nanoröhrchengarn-Verbundwerkstoffen


    Contributors:


    Publication date :

    2008


    Size :

    11 Seiten, 8 Bilder, 11 Quellen


    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English




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