Article
  • Fabrication and Characterization of UV-curable Conductive Transparent Film with Polyaniline Nanofibers
  • Kim SH, Song K
  • 폴리아닐린 나노섬유를 이용한 광경화형 전도성 투명필름의 제조 및 특성
  • 김성현, 송기국
Abstract
Conductive polyaniline (PANI) nanofibers in UV-curable resin were used for a transparent conductive film. The emeraldine-salt PANI (ES-PANI) nanofibers were prepared by chemical oxidation polymerization of aniline, which could be changed into emeraldine-base PANI by dedoping. EB-PANI nanofibers as a precursor for conductive fillers were thereby transformed into re-dpoed PANI (rES-PANI) by dodecylbenzenesulfonic acid in the UV-curable resin solution. rES-PANI nanofibers have high conductivity and long-term stability in the solution without a defect of nanostructure. The resulting conductive resin solution was proved to be highly stable where no precipitation of rES-PANI fillers was observed over a period of 3 months. The transparent film was spin-casted on a poly(methyl methacrylate) sheet of thickness ca. 5 μm. A surface resistance of 6.5 × 108 Ω/sq and transmittance at 550 nm of 91.1% were obtained for the film prepared with a concentration of 1.4 wt% rES-PANI nanofibers in the solution. This transformation process of rES-PANI from ES-PANI by dedoping-redoping can be an alternative method for the preparation of an antistatic protection film with controllable surface resistance and optical transparencies with the PANI concentration in UV-curable solution.

폴리아닐린(PANI) 나노섬유를 전도성 충전제로 사용하여 광경화형 전도성 투명필름을 제조하였다. 화학산화 중합(chemical oxidation polymerization)으로 나노섬유 구조의 산화형 폴리아닐린(ES-PANI)을 합성하였다. ES-PANI는 디도핑을 통해 환원형 폴리아닐린(EB-PANI)으로 유도하였다. 이것을 전도성 충전제의 전구체로 사용하여 도데실벤젠설폰산(DBSA)이 포함되어 있는 광경화형 레진에 분산시키면 재도핑된 재산화형 폴리아닐린(rES-PANI)을 얻을 수 있었다. 이런 과정을 통해 나노섬유 형태가 유지되면서 높은 전도성과 분산안정성이 우수한 광경화형 전도성 레진용액을 제조할 수 있었다. 제조된 광경화형 전도성 레진용액은 상온에서 3달 정도 두어도 rES-PANI 충전제의 침전물이 생기지 않았다. 또한 이 용액을 폴리(메틸 메타크릴레이트)(PMMA) 기재 위에 스핀코팅 후 광경화하여 약 5 μm 두께의 전도성 투명필름을 제조하였다. rES-PANI 나노섬유 농도가 1.4 wt%일 때 표면저항 6.5 × 108 Ω/sq, 550 nm 파장에서 91.1%의 투과도를 보였다. ES-PANI의 디도핑-재도핑(dedoping-redoping) 과정을 통해 광경화형 전도성 레진용액에 분산된 PANI는 농도에 따라 필름표면저항과 광학적 투명도를 조절할 수 있는 대전방지 보호필름을 제작하는 새로운 방법을 제시하였다.

Keywords: polyaniline; antistatic; UV-curable; surface resistance; optical transparency.

References
  • 1. Keum J, Ha CS, Kim Y, Macromol. Res., 14(4), 401 (2006)
  •  
  • 2. Chaudhuri D, Kumar A, Rudra I, Sarma DD, Adv. Mater., 13(20), 1548 (2001)
  •  
  • 3. Pei QB, Yu G, Zhang C, Yang Y, Heeger AJ, Science, 269(5227), 1086 (1995)
  •  
  • 4. Lee D, Cher K, Rhee HW, Kim J, Polym.(Korea), 24(1), 29 (2000)
  •  
  • 5. Cao Y, Andereatta A, Heeger AJ, Smith P, Polymer., 30, 2305 (1989)
  •  
  • 6. Jin S, Tiefel TH, Wolfe R, Sherwood RC, Mottine Jr.JJ, Science., 255, 446 (1992)
  •  
  • 7. Aegerter MA, Al-Dahoudi N, Solieman A, Kavak H, Oliveira P, Mol. Cryst. Liq. Cryst., 417, 105 (2004)
  •  
  • 8. Wang YC, Anderson C, Macromolecules, 32(19), 6172 (1999)
  •  
  • 9. Kulkarni VG, “Transparent conductive coatings”, in Handbook of Conducting Polymers, Marcel Dekker, New York, 2, 1059 (1998)
  •  
  • 10. Martins CR, Paoli MAD, Eur. Polym. J., 41, 2867 (2005)
  •  
  • 11. Annala M, Loefgren B, Macromol. Mater. Eng., 291, 848 (2006)
  •  
  • 12. Wonuters MEL, Wolfs DP, Linde MC, Hovens JHP, Tinnemans AHA, Prog. Org Coat., 51, 312 (2004)
  •  
  • 13. Graham CR, Kinlen PJ, Flaim TD, U.S. Patent 7749603 B2 (2010)
  •  
  • 14. Greczynski G, Kugler T, Salaneck WR, Thin Solid Films, 354(1-2), 129 (1999)
  •  
  • 15. Ghosh S, Rasmusson J, Inganas O, Adv. Mater., 10(14), 1097 (1998)
  •  
  • 16. Wessling B, Synth. Met., 102, 1396 (1999)
  •  
  • 17. Huang WS, Humphrey BD, MacDiarmid AG, J. Chem.Soc., Faraday Trans. 1., 82, 2385 (1986)
  •  
  • 18. Huang J, Kaner RB, Chem. Commun., 4, 367 (2006)
  •  
  • 19. Huang JX, Kaner RB, J. Am. Chem. Soc., 126(3), 851 (2004)
  •  
  • 20. Chen S, Rothstein JP, J. Non-Newton. Fluid Mech., 116(2-3), 205 (2004)
  •  
  • 21. Jang J, Adv. Polym. Sci., 199, 189 (2006)
  •  
  • 22. Tang J, Jing X, Wang B, Wang F, Synth. Met., 24, 231 (1998)
  •  
  • 23. Cao Y, Li S, Xue Z, Guo D, Synth. Met., 16, 305 (1986)
  •  
  • 24. Long Y, Chen Z, Wang N, Li J, Wan M, Physica B., 344, 82 (2004)
  •  
  • 25. Huang WS, MacDiarmid AG, Polymer., 34, 1833 (1993)
  •  
  • 26. Chiou NR, Lee LJ, Epstein AJ, Chem. Mater., 19, 3589 (2007)
  •  
  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2012; 36(4): 531-535

    Published online Jul 25, 2012

  • Received on Apr 6, 2012
  • Accepted on May 8, 2012