화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of the Korean Industrial and Engineering Chemistry, Vol.13, No.5, 443-449, August, 2002
Export Citation
3-(Triethoxysilyl)propyl Perfluoroalkyl Urethane의 합성 및 발수성능
Water Repellent Properties 3-(Triethoxysilyl)propyl Perfluoroalkyl Urethanes
김영운†, 정근우, 이은아, 서용걸
  • 한국화학연구원 응용화학연구부, 대전 305-600
Young Wun Kim†, Keunwo Chung, Eung A Lee, and Yong Geol Seo
  • Applied Chemistry & Engineering Division, Korea Research Institute of Chemical Technology, Yusung, Daejeon 305-600, Korea
E-mail:
초록
과불화기를 함유한 여러 가지 알콜, F(CF2)m(CH2)n+2-OH을 합성하였다. 합성 알콜을 트리에톡시실릴아이소시아네이트와 축합반응하여 트리에톡시실릴프로필 우레탄을 합성하였으며 1H-NMR과 FT-IR 스펙트라로 구조를 확인하였다. 합성 우레탄을 IPA 용매에 녹이고 산 촉매하에서 가수분해 반응을 행한 후 유리에 스핀 코팅하였다. 코팅된 유리를 150 ℃에서 열처리하고 물에 대한 접촉각을 측정하므로써 발수성능을 평가하였다. 발수성능 측정 결과, 물에 대한 접촉각은 100 ~ 120 ° 범위를 나타내었으며 우레탄의 불소기와 메틸렌의 수 및 가수분해 시간에 크게 의존하였다. 또한, 6개월 동안 장기 보관된 코팅 유리의 접촉각은 큰 감소없이 처음의 접촉각을 그대로 나타내어 발수성능은 아주 우수하였다.
A series of alcohols with perfluorinated segments F(CF2)m(CH2)n+2-OH (m={8, 10} and n={2, 4, 8}) were synthesized. The alcohols were converted to triethoxysilylpropyl perfluoroalkyl urethanes by condensation reaction, which were then characterized by 1H-NMR and FT-IR spectra. In the presence of an acid catalyst, the triethoxysilylpropyl urethanes underwent hydrolysis and condensation to yield heavily cross-linked matrixes, and onto glass the spin-coated films were prepared. Curing the spin-coated films at 150 ℃ in air produced thermally stable films. The water contact angles of the films varied from 100 ° to 120 °, depending on the numbers of fluorocarbon and methylene units and the hydrolysis times. It was found that the water contact angles of 6 months old coated films were similar to that of newly coated films. In conclusion, the water-repellent properties of the coated films for a long term storage were excellent.
Keywords:triethoxysilylpropyl perfluoroalkyl urethane;hydrolysis;condensation;contact angle
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