Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Photochromic Properties of Spiropyran in Hard Coating Films Made by Sol-Gel Method

Sol-Gel 하드 코팅 막에서의 Spiropyran의 광 변색 특성

  • Jeong, Sang Hyeok (Department of Chemical and Biochemical Engineering, Konyang University) ;
  • Cho, Kyung In (Department of Chemical and Biochemical Engineering, Konyang University) ;
  • Park, Jeong Yong (Department of Chemical and Biochemical Engineering, Konyang University) ;
  • Song, Ki Chang (Department of Chemical and Biochemical Engineering, Konyang University)
  • 정상혁 (건양대학교 화공생명학과) ;
  • 조경인 (건양대학교 화공생명학과) ;
  • 박정용 (건양대학교 화공생명학과) ;
  • 송기창 (건양대학교 화공생명학과)
  • Received : 2008.01.11
  • Accepted : 2008.01.25
  • Published : 2008.04.30
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Abstract

Organic-inorganic hybrid solutions were made using glycidoxypropyl trimethoxysilane (GPTMS) and vinyltriethoxysilane (VTES) as starting materials by sol-gel method. Photochromic coating solutions were prepared by mixing the solution of photochromic dye (spiropyran) dissolved in ethylacetate with the organic-inorganic hybrid solutions. Photochromic films were prepared on polycarbonate sheets by spin coating and cured for 2 h at $100^{\circ}C$. The resulting films exhibited a reversible color change upon irradiation with UV light from transparent to blue. The color-fading speed and pencil hardness of the coating films increased with increasing the GPTMS content in the coating solutions.

실란커플링제인 glycidoxypropyl trimethoxysilane(GPTMS)과 vinyltriethoxysilane(VTES)을 출발물질로 하여 sol-gel 법에 의해 유-무기 혼성 용액을 제조하였다. 이 용액에 spiropyran계 광 변색 염료를 ethylacetate에 용해시킨 용액을 혼합하여 광 변색 코팅 용액을 제조하였다. 그 후 기재인 polycarbonate 시트에 스핀 코팅 시키고 $100^{\circ}C$에서 2 h 동안 열 경화시켜 광 변색성을 갖는 하드 코팅 막을 제조하였다. 코팅 막은 UV 광을 조사함에 의해 투명색으로부터 푸른색으로 변했다가 다시 투명색으로 변하는 가역적인 색변화를 보여주었다. 이때 코팅 막의 소색속도 및 연필경도는 코팅 용액 중의 GPTMS의 mol비가 증가됨에 따라 증가하였다.

Keywords

Acknowledgement

Supported by : 한국산업기술재단

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