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Sol-Gel 법에 의한 친수성 무기-유기 혼성 코팅 용액의 제조
Preparation of Hydrophilic Inorganic-Organic Hybrid Coating Solutions by Sol-Gel Method
건양대학교 화학공학과, 320-711 충남 논산시 내동 26 1우리테크, 302-070 대전시 서구 평촌동 88-1
Department of Chemical Engineering, Konyang University, 26, Nae-dong, Nonsan, Chungnam 320-711, Korea 1Uri-Tech, 88-1, Pyungchon-dong, Seo-gu, Daejeon 302-070, Korea
HWAHAK KONGHAK, December 2003, 41(6), 768-772(5), NONE
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Abstract
소수성 고분자 필름의 무적성을 향상시키기 위하여 우수한 친수성을 보이는 무기-유기 혼성 코팅용액을 Sol-Gel법으로 합성하였다. 코팅용액은 무기물인 콜로이드 실리카 용액(Ludox)에 유기 조성을 함유한 화합물인 APS(3-aminopropyltriethoxysilane)를 첨가하여 제조하였다. 실란 커플링제인 APS는 콜로이드 실리카와 주변의 매트릭스인 고분자 필름(PET)에 각각 강한 결합을 형성하여 두 개의 서로 다른 물질을 강하게 연결하는 결합제 역할을 한다. 산성과 중성인 조건에서 (pH 2, 7) APS가 첨가되어 제조된 경우에는 순간적으로 용액은 겔이 되어 고분자 필름 위에 코팅 할 수 없었다. 반면 염기성 조건에서(pH 9, 11) 만들어진 혼성 코팅용액으로 고분자 필름 위에 코팅한 경우에는 코팅 필름의 표면이 거의 균열이 없는 미세구조를 보이며, 낮은 접촉각을 보여 우수한 친수성을 나타내었다.
In order to improve the anti-fogging property of hydrophobic polymer films, inorganic-organic hybrid coating solutions with a good hydrophilic property were synthesized by the sol-gel method. The coating solutions were prepared by adding 3-aminopropyl triethoxysilane (APS) to a colloidal silica solution(Ludox). APS as a silane coupling agent forms strong bonds to the colloidal silica and surrounding polymer matrix (PET), and links two different materials together. Solutions prepared by the addition of APS at acidic and neutral conditions (pH 2, 7) resulted in gels which can not be used as coating solutions. On the other hand, those at basic conditions (pH 9, 11) resulted in coatings that were less prone to cracking and showed a good hydrophilic property.
Keywords
References
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Schmidt H, J. Non-Cryst. Solids, 73, 681 (1985)
Fadeev AY, McCarthy TJ, Langmuir, 14(19), 5586 (1998)
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Song KC, Park JK, Kang HU, Kim SH, J. Sol-Gel Sci. Tech., 27(1), 53 (2003)
