Humidity-Sensitive Characteristics and Reliabilities of Polymeric Humidity Sensors Using 2-Methacryloxyethyl dimethyl 2-hydroxyethyl ammonium brornide

2-Methacryloxyethyl dimethyl 2-hydroxyethyl ammonium bromide를 이용한 고분자 습도센서의 감습 특성 및 신뢰성

  • Received : 1999.02.13
  • Accepted : 1999.04.13
  • Published : 1999.05.10


The humidity sensor containing ammonium salt was prepared from the copolymer of 2-methacryloxyethyl dimethyl 2-hydroxyethyl ammonium bromide (MDHAB)/MMA/DAEMA = 6/3/1. The humid membrane was fabricated on the gold/alumina electrode by dipping. The impedances were $298k{\Omega},\;11k{\Omega}$, and $2.3k{\Omega}$ at 40%RH, 70%RH and 90%RH, respectively, at $5^{\circ}C$ and the humidity-sensitive characteristics were suitable for low temperature humidity sensor. The temperature-dependent coefficient between $5^{\circ}C$ and $20^{\circ}C$ was found to be $-0.80%RH/^{\circ}C$ and the hysteresis falled in the ${\pm}2%RH$ range. The response time was found to be 38 sec for the relative humidity ranging from 34%RH to 88%RH at $20^{\circ}C$. The reliabilities such as temperature cycle, humidity cycle, high temperature and humidity resistance, electrical load stability, stability of long-term storage and water durability were measured and evaluated for the application as a humidity sensor.


Humidity Sensor;2-Methacryloxyethyl dimethyl 2-hydroxyethyl ammonium bromide;Reliability;Cross-linked Copolymer


Supported by : 한국과학재단


  1. Kobunshi Ronbunshu v.41 Y. Sakai;Y. Sadaoka;S. Okumura;K. Ikeuchi
  2. Polymer(Korea) v.19 J. S. Paek;S. T. Kim;M. S. Gong
  3. J. Electrochem. Soc. v.136 Y. Sakai;Y. Sakaoka;M. Matsuguchi
  4. Sensors and Actuators v.16 Y. Sakai;Y. Sakaoka;M. Matsuguchi;N. Moriga;M. Shirnada
  5. Sensor and Actuators v.13 Y. Sakai;Y. Sakaoka;H. Fukumoto
  6. Polymer(Korea) v.20 J. S. Baek;M. S. Gong
  7. Humidity Sensors Manual Association of Humidity Measuring Sensors
  8. J. Korean Ind. & Eng. Chemistry v.9 O. Kim;M. S. Gong
  9. Korean J. Mater Res. v.5 J. S. Paek;M. S. Gong
  10. J. Mater. Sci. v.21 Y. Sadaoka;Y. Sakai
  11. Sensors and Actuators v.9 Y. Sakai;Y. Sakaoka;K. Ikeuchi
  12. Polymer(Korea) v.18 J. S. Paek;I. Y. Lee;J. K. Park;M. S. Gong
  13. Sensor and Actuators v.11 J. P. Randin;F. Zulling
  14. Kobunshi Ronbunshu v.45 S. Otsuki;Y. Dozen
  15. Handbook of Materials and Moisture Kyoritsu Publish