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Humidity-sensitive properties of phosphonium salt-containing polyelectrolytes

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Abstract

New phosphonium salt-containing monomer, (vinylbenzyl) tributyl phosphonium chloride (1), was prepared and polymerized for a humidity-sensing film. The humidity-sensitive membranes were composed of copolymers with different contents of 1 and styrene (2) or n-butyl acrylate (3) (1/2 or 1/3 = 1/0, 4/1, 2/1 and 1/1). When the impedance dependencies on the relative humidity of the copolymers were measured, the impedance increased with an increase in the content of 2 or 3. The impedance ranged from 107 to 104 Ω between 20%RH and 95%RH, which was required for a humidity sensor operating at ambient humidity. Temperature dependence, frequency dependence, hysteresis and response time were also measured and reliability was evaluated.

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Authors and Affiliations

  1. Department of Chemistry, Dankook University, Cheonan, Chungnam, 330-714, Korea

    Myoung-Seon Gong, Chil-Won Lee & Sang-Woo Joo

  2. Department of Applied Physics, Dankook University, Seoul, 140-714, Korea

    Byoung-Koo Choi

Authors
  1. Myoung-Seon Gong
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  2. Chil-Won Lee
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  3. Sang-Woo Joo
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  4. Byoung-Koo Choi
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Correspondence to Myoung-Seon Gong.

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Gong, MS., Lee, CW., Joo, SW. et al. Humidity-sensitive properties of phosphonium salt-containing polyelectrolytes. Journal of Materials Science 37, 4615–4620 (2002). https://doi.org/10.1023/A:1020604617228

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