Article
  • Resistive Humidity Sensor from Copolymers Containing Quaternary Ammonium Salt (II): Four Component Copolymers
  • Lee DG, Lim TH, Jeon YM, Gong MS
  • 4차 암모늄염을 포함하는 공중합체를 이용한 저항형 습도센서 (II)：4원 공중합체
  • 이동근, 임태호, 전영민, 공명선
Abstract
The resistive-type humidity sensors were prepared from the copolymers of [2-[(methacryloyloxy)ethyl]dimethyl]propylammonium bromide (MEPAB), [2-[(methacryloyloxy)ethyl]- 2-hydroxyethyl]dimethylammonium bromide (MEHDAB), 2-[(methacryloyloxy)ethyl]trimethylammonium chloride (METAC,) and n-butyl methylacrylate (MBA). Four component copolymers MEPAB/BMA/ MEHDAB/METAC＝4/4/1/1, 3/5/1/1, 2/6/1/1, 1/7/1/1 crosslinked with blocked-isocyanate on Ag/Pd electrode/alumina substrate showed a good durability at high humidities. The various electrical properties such as frequency dependency, temperature dependency, hysteresis, response time and water durability were examined. In the case of copolymer composed of MEPAB/BMA/MEHDAB/METAC＝2/6/1/1, the resistance varied from 1.4 M to 2.9 k at 25 ℃ in the range of 30∼90 %RH and this copolymers showed a good linearity and low hysteresis.

저항형 습도센서를 제조하기 위하여 [2-[(methacryloyloxy)ethyl]dimethyl] propylammonium bromide (MEPAB), [2-[(methacryloyloxy)ethyl]-2-hydroxyethyl]dimethylammonium bromide(MEHDAB), 2- [(methacryloyloxy)ethyl]trimethylammonium chloride(METAC,) 그리고 n-butyl methylacrylate(BMA)의 공중합체를 사용하였다. 4가지 종류의 4원 공중합체 MEPAB/BMA/MEHDAB/METAC＝4/4/1/1, 3/5/1/1, 2/6/1/1, 1/7/1/1을 blocked-isocyanate가교제를 사용하여 Ag/Pd 전극/알루미나에 도포한 후 좋은 내수성을 보여주었다. 습도센서의 상대습도에 대한 주파수 의존성, 온도 의존성, 히스테리시스, 응답속도 그리고 내수성을 평가하였다. MEPAB/BMA/MEHDAB/METAC＝2/6/1/1 공중합체의 경우, 30∼90%RH에서 1.4 M ∼2.9 k 의 저항을 보여주었으며 좋은 직선성과 작은 히스테리시스를 보여주었다.

Keywords: resistive humidity sensor; 4-component copolymer; ammonium salt; isocyanate crosslinker

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2023 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2007; 31(4): 302-307

    Published online Jul 25, 2007

  • Received on Jan 23, 2007
  • Accepted on May 16, 2007