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Received October 17, 2007
Accepted October 18, 2007
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Sol-Gel법에 의해 Spiropyran을 함유한 광 변색 코팅 막의 제조
Preparation of Photochromic Coating Films Containing Spiropyran by Sol-Gel Method
건양대학교 화공생명학과, 302-711 충남 논산시 내동 26
Department of Chemical and Biochemical Engineering, Konyang University, 26 Nae-dong, Nonsan, Chungnam 320-711, Korea
Korean Chemical Engineering Research, February 2008, 46(1), 112-117(6), NONE Epub 28 February 2008
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Abstract
1:1로 몰 비가 조절된 glycidoxypropyl trimethoxysilane(GPTMS)과 methyl triethoxysilane(MTES)을 출발물질로 하여 sol-gel법에 의해 유-무기 혼성 용액을 제조하였다. 이 용액에 spiropyran계 광 변색 염료를 ethylacetate(EA)에 용해 시킨 용액을 혼합하여 광 변색 코팅 용액을 제조하였다. 그 후 기재인 polycarbonate 시트에 스핀 코팅 시키고 100 ℃ 에서 2 h 동안 열 경화 시켜 광 변색 코팅 막을 제조하였다. 코팅 막은 UV 광을 조사함에 의해 가역적인 색변화를 보여주었다. 이때 코팅 막의 소색속도는 코팅 용액 중의 EA의 첨가량이 증가됨에 따라 증가하였다.
Organic-inorganic hybrid solutions were prepared via sol-gel method using glycidoxypropyl trimethoxysilane (GPTMS) and methyl triethoxysilane (MTES) as starting precursors at a molar ratio of 1:1. The photochromic coating solutions were prepared by mixing the solutions of photochromic dye (spiropyran) dissolved in ethylacetate (EA) with the organic-inorganic hybrid solutions. Photochromic films were prepared on polycarbonate substrate by spin coating and cured for 2 h at 100 ℃. The resulting films exhibited a reversible color change upon irradiation with UV light. The photochromic properties of the films showed that the color-fading speed increases with increasing the EA content in the coating solutions.
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References
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Guglielmetti R, Photochromism, Elsevier Sci. Amsterdam (1990)
Zayat M, Levy D, J. Mater. Chem., 13, 727 (2003)
Hou LS, Schmidt H, J. Mater. Sci., 31(13), 3427 (1996)
