화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.34, No.4, 313-320, July, 2010
Export Citation
알루미나 기재에 부착된 습도센서용 자기 가교형 감습성 전해질 고분자의 내수성
Self-Curable Humidity-Sensitive Polyelectrolytes Attached to the Alumina Substrate for the Humidity Sensor and their Stability in Water
한대상, 공명선†
  • 단국대학교 나노바이오의과학과
Dae-Sang Han, and Myoung-Seon Gong†
  • Department of Nanobiomedical Science, Dankook University, Cheonan, Chungnam 330-714, Korea
E-mail:
초록
신나메이트기를 갖는 새로운 자기 경화형 감습성 고분자 및 고분자형 앵커제로 사용하기 위하여 [2-[(methacryloyloxy) ethyl]dimethyl]propyl ammonium bromide(MEPAB), methyl methacrylate(MMA), 3-(trimethoxysilyl) propyl methacrylate(TMSPM) 및 2-(cinnamoyloxy)ethyl methacrylate(CEMA)의 공중합체들을 합성하였다. 광가교성 공중합체들로서 MEPAB/MMA/TMSPM/CEMA＝70/20/0/10의 조성을 갖는 공중합체는 감습성 전해질 고분자로서, 그리고 50/0/20/30과 0/0/50/50 조성은 고분자형 부착제로 사용하였다. 이들 광가교형 고분자 실란커플링 처리제의 전극 표면과 부착 특성을 비교하기 위하여 3-(triethoxysilyl)propyl cinnamate(TESPC)도 표면 부착을 위한 표면처리제로서 사용하였다. 표면처리제는 전극의 기재 표면 위에 공유결합을 통하여 광가교성 신나메이트 박막을 형성시킬 수 있었으며 센서에 UV가 조사되었을 때 전해질 고분자가 [2π＋2π] 환화반응을 이용한 가교반응으로 기재에 부착되었다. 이렇게 고분자 표면처리제 및 TESPC로 처리된 센서들은 24시간 물에 침적시켰을때 60∼85%의 저항 증가가 생겼으며 이것은 상대습도 변화로서 2.25∼3.15%RH에 해당하였다. 또한, -0.2%RH 이하의 양호한 히스테리시스, 90초의 응답 및 회복속도, 그리고 80 ℃ 및 90%RH의 고온 고습에서 매우 좋은 신뢰성을 보여주었다.
New cinnamate group-containing copolymers for a self-curable, humidity-sensitive polyelectrolyte and polymeric anchoring agents were prepared by copolymerization of [2-[(methacryloyloxy) ethyl]dimethyl]propyl ammonium bromide(MEPAB), methyl methacrylate(MMA), 3-(trimethoxysilyl) propyl methacrylate(TMSPM) and 2-(cinnamoyloxy)ethyl methacrylate(CEMA). Photocrosslinkable copolymer composed of MEPAB/MMA/TMSPM/CEMA＝70/20/0/10 were used for humidity-sensitive membrane, and those of 50/0/20/30 and 0/0/50/50 were used for polymeric anchoring agents. 3-(Triethoxysilyl)propyl cinnamate(TESPC) was also used as a surface-pretreating agent for the comparison of capability of attachment of polyelectrolyte to the electrode surface with polymeric photocurable silanecoupling agents. Pretreatment of the electrode substrate with anchoring agents was performed to form a cinnamate thin film on the electrode through covalent bonds. When the sensors were irradiated with UV light, the anchoring of a polyelectrolyte into the substrate was carried out via the [2π＋2π] cycloaddition. The resulting sensors using polymeric anchoring agents and TESPC showed water durability with increase of resistance by 60∼85%, which is corresponding to the reduction of 2.25∼3.15%RH, after soaking in water for 24 h. They showed good hysteresis (－0.2%RH), response time (90 sec) and long-term stability at high temperature and humidity.
Keywords:humidity sensor;anchoring;polyelectrolyte;photocrosslinking;cinnamate;water durability
  1. Sakai Y, Sadaoka Y, Hukumoto H, Sens. Actuators, 13, 243 (1988)
  2. Hijikigawa M, Miyosh S, Sugihara T, Jinda A, Sens. Actuators, 4, 307 (1983)
  3. Ueda M, Nakamura K, Tanaka K, Kita H, Okamoto K, Sens. Actuators B, 127, 463 (2007)
  4. Jeon YM, Gong MS, Macromol. Res., 17(4), 227 (2009)
  5. Sakai Y, Sadaoka Y, Matsuguchi M. Moriga N, Shimada M, Sens. Actuators B, 16, 359 (1989)
  6. Yang MJ, She Y, Li Y, J. Mater. Sci. Lett., 21(19), 1477 (2002)
  7. Lee DG, Lim TH, Jeon YM, Gong MS, Polym.(Korea), 31(3), 194 (2007)
  8. Lee DG, Lim TH, Jeon YM, Gong MS, Polym.(Korea), 31(4), 302 (2007)
  9. Lee CW, Rhee HW, Gong MS, Synth. Met., 106, 177 (1999)
  10. Cho NB, Lim TH, Jeon YM, Gong MS, Sens. Actuators B, 130, 594 (2008)
  11. Sakai Y, Matsuguchi M, Hurukawa T, Sens. Actuators B, 66, 135 (2000)
  12. Gong MS, Joo SW, Choi BK, J. Mater. Chem., 12, 902 (2002)
  13. Lee CW, Nam DH, Han YS, Chung KC, Gong MS, Sens. Actuators B, 109, 334 (2005)
  14. Lee CW, Kim O, Gong MS, J. Appl. Polym. Sci., 89(4), 1062 (2003)
  15. Li Y, Yang MJ, She Y, Sens. Actuators B, 107, 252 (2005)
  16. Lee CW, Choi BK, Gong MS, Analyst, 129, 651 (2004)
  17. Gong MS, Rhee HW, Lee MH, Sens. Actuators B, 73, 124 (2001)
  18. Sakai Y, Matsuguchi M, Yonesato N, Electrochim. Acta, 46(10-11), 1509 (2001)
  19. Sakai Y, Matsuguchi M, Sadaoka Y, Hirayama K, J. Electrochem. Soc., 140, 432 (1993)
  20. Yao Z, Yang MJ, Sens. Actuators B, 117, 93 (2006)
  21. Lee CW, Choi BK, Gong MS, Sens. Actuators B, 105, 150 (2005)
  22. Lee CW, Park HS, Gong MS, Macromol. Res., 12(3), 311 (2004)
  23. Lee CW, Park HS, Kim JG, Gong MS, Macromol. Res., 13(2), 96 (2005)
  24. Su PG, Chen IC, Wu RJ, Anal. Chim. Acta, 449, 103 (2001)
  25. Park HS, Gong MS, Macromol. Res., 18(6), 596 (2010)
  26. Han DS, Gong MS, Sens. Actuators B, 147, 330 (2010)
  27. Jeon YM, Gong MS, Polym.(Korea), 33(1), 19 (2009)
  28. Lv X, Li Y, Li P, Yang M, Sens. Actuators B, 135, 581 (2009)
  29. Fouassier JP, Photoinitiation, photopolymerization, and photocuring: fundamentals and applications, Hanser Publishers, NewYork, p 2, Chapter1 (1995)
  30. Corrales T, Catalina F, Peinado C, Allen NS, J. Photochem. Photobiol. A, 159, 103 (2003)
  31. Scully AD, Horsham MA, Aguas P, Murphy JKG, J. Photochem. Photobiol. A, 197, 132 (2008)
  32. Prucker O, Naumann CA, Ruhe J, Knoll W, Frank CW, J. Am. Chem. Soc., 121(38), 8766 (1999)
  33. Gupta P, Trenor SR, Long TE, Wilkes GL, Macromolecules, 37(24), 9211 (2004)
  34. Ichimura K, Akita Y, Akiyama H, Kudo K, Hayashi Y, Macromolecules, 30(4), 903 (1997)
  35. Atta AM, El-Ghazawy RAM, Farag RK, El-Kafrawy AF, Abdel-Azim AAA, Polym. Int., 54, 1088 (2005)