화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.11, No.5, 322-327, October, 2003
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Resistive Humidity Sensor Using Phosphonium Salt-Containing Polyelectrolytes Based on the Mutually Cross-linkable Copolymers
Chil-Won Lee, and Myoung-Seon Gong†
  • Dept. of Chemistry, Dankook University, Cheonan, Chungnam 330-714, Korea
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Two kinds of mutually cross-linkable copolymers were prepared to be used as humidity-sensing materials. The humidity-sensitive thin films consist of cross-linked polyelectrolytes of the following component: 4-vinylbenzyl dimethyl 2-(dimethylphosphino)ethyl phosphonium chloride (1)/ bis(2-methoxyethyl)itaconate (2)= 3/1, 2/1, 1/1 and 1/2 and 4-vinylbenzyl chloride (3)/ vinylbenzyl tributyl phosphonium chloride (4)= 3/1, 2/1, 1/1 and 1/2. The humidity sensor prepared from the reaction of 1/2= 2/1 with 3/4= 2/1 showed an average resistance of 723, 36.2 and 2.42 kΩ at 30, 60 and 90%RH, respectively. Temperature dependence, frequency dependence, and response time were measured and the reliability test such as water durability and long-term stability were also estimated.
Keywords:polyelectrolyte;phosphonium salt;copolymers;cross-linking;humidity sensor
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