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Issue
Korean Chemical Engineering Research,
Vol.45, No.5, 442-447, 2007
Sol-Gel 법에 의해 Colloidal Silica와 Glycidoxypropyl Trimethoxysilane으로 부터 하드코팅 용액의 제조
Preparation of Hard Coating Solutions using Colloidal Silica and Glycidoxypropyl Trimethoxysilane by the Sol-Gel Method
김대현, 송기창, 정재식, 이범석
투명 플라스틱 필름의 표면강도를 향상시키기 위하여 유-무기 혼성 코팅용액을 Sol-Gel 법을 이용하여 합성하였다. 코팅용액은 입자 직경이 12 nm 크기의 무기물인 colloidal silica 용액(Ludox)에 유기물인 GPTMS(glycidoxypropyl trimethoxysilane)를 첨가하여 제조하였다. 그 후에 기재인 PC(polycarbonate) 필름에 담금 코팅(dip-coating)시키고, 상온에서 10분 동안 건조시킨 후, 80 ℃에서 30분 동안 열 경화시켜 하드 코팅 막을 제조하였다. 이 과정 중 코팅용액의 pH 변화와 GPTMS 첨가량의 변화가 코팅 막의 물성에 미치는 영향을 살펴보았다. pH 4의 산성 조건에서 제조된 코팅용액으로 PC 필름 위에 코팅한 경우는 중성이나 염기성 조건으로 제조된 경우 보다 우수한 연필경도 및 기재와의 부착력을 보였다. 또한 GPTMS의 첨가량이 증가할수록 코팅 막의 연필경도 및 기재와의 부착력이 증가하였다.
In order to improve the surface hardness of transparent plastic films, organic-inorganic hybrid coating solutions were synthesized by the sol-gel method. The coating solutions were prepared by adding GPTMS (glycidoxypropyl trimethoxysilane) to a colloidal silica (12 nm) suspension. PC(polycarbonate) substrates were dipped into the coating solutions and dried at room temperature for 10 min before being cured at 80 ℃ for 30 min. The effect of the solution pH and GPTMS content was investigated on the properties of coating films. The pencil hardness and adhesion to substrates of the coating films, prepared at acidic condition (pH 4), showed better properties than those at neutral or basic conditions. Also, the pencil hardness and adhesion to substrates of the coating films increased with increasing GPTMS content.
Keywords: Glycidoxypropyl Trimethoxysilane; Colloidal Silica; Hard Coating; Sol-Gel Method; Organic-Inorganic; Films
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[Cited By]
  1. Oh SK, Chung JS, Lee BS, Song KC, Korean Chemical Engineering Research, 46(2), 274, 2008
  2. Hwang JH, Song KC, Korean Chemical Engineering Research, 49(3), 277, 2011
  3. Lee BH, Kim EK, Lee S, Lim HJ, Lee IP, Korean Chemical Engineering Research, 54(2), 163, 2016
  4. Yang JH, Cho YJ, Song KC, Korean Chemical Engineering Research, 56(2), 162, 2018
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