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Received September 22, 2017
Accepted October 16, 2017
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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콜로이드 실리카 종류가 친수성 코팅 필름의 물성에 미치는 영향

Effect of Types of Colloidal Silica on Properties of Hydrophilic Coating Films

건양대학교 의료신소재학과, 32992 충청남도 논산시 대학로 121
Department of Biomedical Materials, Konyang University, 121, Daehak-ro, Nonsan, Chungnam, 32992, Korea
Korean Chemical Engineering Research, December 2017, 55(6), 830-836(7), 10.9713/kcer.2017.55.6.830 Epub 5 December 2017
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Abstract

콜로이드 실리카를 실란커플링제인 GPTMS (3-glycidoxypropyl trimethoxysilane)와 반응시킴에 의해 친수성 코팅용액을 제조하였다. 또한 이 친수성 코팅 용액을 폴리카보네이트 기재 위에 스핀코팅 시킨 후 120 °C에서 열경화 시킴에 의해 친수성 코팅 도막이 제조되었다. 이 과정 중 콜로이드 실리카의 평균 크기를 15 nm, 25 nm, 45 nm로 각각 변화시켜 코팅 도막의 물성에 미치는 영향을 살펴보았다. 그 결과 25 nm 크기의 콜로이드 실리카를 사용하여 제조된 코팅 도막은 20°의 낮은 접촉각과 H의 우수한 연필경도를 나타내었다. 반면에 15 nm와 45 nm 크기의 콜로이드 실리카로 제조된 코팅 도막은 각각 27°와 36°의 높은 접촉각과 H와 B의 연필경도를 나타내었다.
Hydrophilic coating solutions were prepared by reacting a silane coupling agent, GPTMS (3-glycidoxypropyl trimethoxysilane) with colloidal silica. Hydrophilic coating films were also obtained by depositing the hydrophilic coating solutions on polycarbonate substrates by spin-coating and subsequently by thermal curing at 120 °C. During this process, the effect of average particle sizes of colloidal silica was studied on the properties of coating films. As a result, coating film, prepared from colloidal silica with average particle size of 25 nm, showed a low contact angle of 20° and a good pencil hardness of H. On the other hand, coating films, prepared from colloidal silica with average particle sizes of 15 nm and 45 nm, exhibited high contact angles of 27° and 36° and pencil hardness of H and B, respectively.

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