Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Preparation of Hard Coating Solutions using Colloidal Silica and Glycidoxypropyl Trimethoxysilane by the Sol-Gel Method

Sol-Gel 법에 의해 Colloidal Silica와 Glycidoxypropyl Trimethoxysilane으로 부터 하드코팅 용액의 제조

  • Kim, Dae Hyun (Department of Chemical and Biochemical Engineering, Konyang University) ;
  • Song, Ki Chang (Department of Chemical and Biochemical Engineering, Konyang University) ;
  • Chung, Jae Shik (Advanced Materials Institute) ;
  • Lee, Bum Suk (Korea Institute of Energy Research)
  • Received : 2007.05.30
  • Accepted : 2007.06.13
  • Published : 2007.10.31
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Abstract

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 $80^{\circ}C$ 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.

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, $80^{\circ}C$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.

Keywords

Acknowledgement

Grant : 저가용 금속알콕사이드 합성 및 이를 이용한 에너지 절약형 유리타일

Supported by : 에너지관리공단

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