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A novel polycaprolactone-grafted-carbon black nanocomposite-based sensor for detecting solvent vapors

Authors

  • Jianguo Cheng,

    1. The State Key Laboratory of Chemical Engineering, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
    2. Department of Chemical Engineering, Hangzhou Vocational and Technical College, Hangzhou 310018, People's Republic of China
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  • Li Wang,

    Corresponding author
    1. The State Key Laboratory of Chemical Engineering, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
    • The State Key Laboratory of Chemical Engineering, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China===

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  • Jia Huo,

    1. The State Key Laboratory of Chemical Engineering, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
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  • Haojie Yu

    1. The State Key Laboratory of Chemical Engineering, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
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Abstract

A novel vapor sensor is fabricated with polycaprolactone-grafted-carbon black (CB-g-PCL) as sensing materials. The influence of PCL with different grafting contents and solvents with various solubility and concentrations including benzene, deionized water, epoxy chloropropane (ECP), ethanol, toluene, and tetrahydrofuran on the response of electric resistance was investigated. When compared with mixture of PCL and carbon black, the CB-g-PCL-based sensor shows high sensitivity and good reproducibility. Sensor with moderate content of grafting PCL showed high sensitivity to vapors. The electric resistance of sensor drastically increased in ECP, ethanol, and deionized water with similar solubility with PCL and showed slight increase in benzene, toluene, and tetrahydrofuran with different solubility. The study on the response of electric resistance of CB-g-PCL to different vapors confirmed the swelling-induced sensing mechanism of sensor based on polymer-grafted-conductive nanomaterials. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

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