Preparation and Properties of Polymer Blends Type Humidity Sensor for Process Safety

공정안전용 Polymer Blend형 습도센서의 특성 연구

  • Published : 2004.09.01


Conductive polymer blends and composites are widely used for different safety application such as electrostatic charge dissipation(ESD), electromagnetic interference(EMI) shielding, electrostatic prevention and safety chemical sensor. In order to prepare a impedance-type humidity sensor that is durable at high humidities and high temperature, electically conductive polymer blends based on diallyldimethylammonium chloride(DADMAC) and epoxy were prepared in this study. The polymer blends type conductive ionomer exhibits reaction each other DADMAC and epoxy in FT-IR and DSC analysis. The blends material was traced by new peak at 1600cm-1 and appeard improvement of thermal resistance by melting point shift. Alumina substrate was deposited a pair of gold electrodes by screen printing. The blend material were spin-coated with a thin film type on the surface of alumina substrate. The polymer bleld type sensor exhibits a linear impedance increasing better than DADMAC coated humidity sensor. Also it shows good sensitivity, low hysteresis and durability against high humidity.


conductive polymer;polymer blend;quaternary ammonium salt;reactive epoxy;ionomer;humidity sensor


  1. G. Jin, J. Norrish, C. Too and G. Wallace, 'Polypyrrole filament sensors for gases and vapours', Current Applied Physics, Vol. 4, pp. 366-369, 2004
  2. N. Tirelli and D. Hunkeler, 'Variation in the diallyldimethylannnoruwn chlorid (DADMAC) polymers architectures : PEG/DADMAC blocks and partially quatemarized polymer', Macromolecular Chemistry and Physics, Vol. 200, pp. 1068-1073, 2004<1068::AID-MACP1068>3.0.CO;2-0
  3. H. Kusano, S. I. Kimura, M. Kitagawa and H. Kobayashi, 'Application of cellulose LangmuirBlodgett films as hmnidity sensors, and characteristics of thesorption of water molecules into polymer monolayer', Thin Solid Films, Vol. 295, pp. 53-59, 1997
  4. 강영구, 조명호, 류상은,' 폴리 4급 암모늄형 습도센서의 개발에 관한 연구', 한국산업안전학회 98추계학술발표논문집, pp. 283-287, 1998
  5. A. Tetelin, C. Pellet, C. Laville and G. NKaoua, 'Fast response hmnidity sensors for a medical microsyste'", Sensors and Actuators, Vol. 91, pp. 211-218, 2003
  6. W. Thongruang, R J. Spontak and C. M. Balik,'Bridged double percolation in conductive polymer composites: an electrical conductivity, morphology and mechanical property study', Polymer, Vol. 43, pp. 3717-3725, 2002
  7. W. A Gazotti Jr, G. C. Miceli, S. Mitzakoff, A Geri, M. C. Gallazzi and M.. A. De Paoli, "Conductive polymer blends as electrochromic materials", Electrochimica Acta, Vol. 44, pp. 1965-1971, 1999.
  8. C. Y. Yang, M .Reghu, A. J. Heeger and Y. Cao, 'Thermal stability of polyaniline networks in conducting polymer blends', Synthetic Metals, Vol. 79, pp. 27-32, 1996
  9. N. S. Choi and J. K. Park, 'New polymer electrolytes based on PVC/PMMA blend for plastic lithitun ion batteries', Electrochimica Acta, Vol. 46, pp. 1453-1459, 2001
  10. 강영구, 조명호,' 무전해 도금 Glass Fiber 복합 플라스틱 성형체의 전자파 차폐효과 및 강도특성', 한국산업안전학회 2004춘계학술발표논문집, pp. 135-139, 2004
  11. W. Gapel, J. Hesse and J. N. Zemel, Sensors, Vol. 3, VCH, Weinheim, 1992
  12. K. S. Lee, Y. C. Lee, B. G. Cho and M. S. Gong, 'Preparation of epoxy resins containing ether ether ketone unit and their thermal properties', Bulletin of the Korean Chemical Society, Vol. 22, No.4, pp. 424-426, 2001
  13. S. L. Bai, G. T. Wang , L. M .River and C. G. Sell, 'Microstructures and mechanical properties of polypropylene/polyamide6/polyethelene octene lastomer blends', Polymer, Vol. 45, pp.3063-3071, 2004
  14. H. Cartier and G.HI. Hu, 'A novel reactive extrusion process for compatibilizing immiscible polymer blends', Polymer, Vol. 42, pp. 8807-8816, 2001
  15. M. Matsuguchi, A. Okamoto and Y. Sakai, 'Effect of hmnidity on $NH_3$ gas sensitivity of polyaniline blend films', Sensors and Actuators, Vol. 94, pp. 46-52, 2003
  16. L. W. Langley, A. Barnes, G. Matijasevic and P. Gandhi, 'High sensitivity, surface attached heat flux sensors', Microelectronics Journal, Vol. 30, pp. 1163-1168, 1999
  17. X. Hou and K .S. Siow, 'Ionic conductivity and electrochemical characterization of novel interpenetrating polymer network electrolytes', Solid State lonics, Vol. 147, pp. 391-395, 2002
  18. S. L. Bai, G. T. Wang, J. M. Hiver and C. G. Sell, 'Microstructures and mechanical properties of polypropylene/polyamide6/polyethelene octene elastomer blends', Polymer, Vol. 45, pp. 3063-3071, 2004