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Language: korean

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received April 2, 2018
Accepted May 1, 2018

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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졸-겔법에 의해 Tetraethoxysilane과 Methyltrimethoxysilane으로부터 발수코팅제 제조

Preparation of Water-Repellent Coating Solutions from Tetraethoxysilane and Methyltriethoxysilane by Sol-Gel Method

김동구 이병화¹ 송기창^†

Dong Gu Kim Byung Wha Lee¹ Ki Chang Song^†

건양대학교 의료신소재학과, 35365 대전시 서구 관저동로 158 ¹대흥화학공업(주) 기술연구소, 17746 경기도 평택시 산단로 64번길 68

Department of Biomedical Materials, Konyang University, 158 Gwanjeodong-ro, Seo-gu, Daejeon, 35365, Korea ¹Research Institute of Daeheung Chemical Industry Co., 68, Sandan-ro 64beon-gil, Pyeongtaek-si, Gyeonggi-do, 17746, Korea

Korean Chemical Engineering Research, June 2018, 56(3), 327-334(8), 10.9713/kcer.2018.56.3.327 Epub 4 June 2018

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Abstract

출발물질로서 테트라에톡시실란(TEOS)과 메틸트리메톡시실란(MTMS)을 사용하여 졸-겔법에 의해 발수성 코팅용액을 제조하였다. 이 용액을 냉연강판 위에 스핀 코팅하고 열처리하여 비불소계 발수 코팅 도막을 제조 하였다. 이 과정 중 MTMS/TEOS의 몰 비, 물 농도 및 암모니아 농도가 코팅 도막의 발수성에 미치는 영향을 연구하였다. MTMS/TEOS의 몰 비를 1~20으로 변화시켜 제조 한 코팅 도막의 접촉각은 MTMS/TEOS 몰 비가 10 일 때 최대 수치인 108°를 나타내었다. 반면에 물의 첨가량을 증가시킴에 따라 코팅 도막의 접촉각이 증가하여 발수성이 향상되었다. 또한 암모니아의 첨가량이 커질수록 실리카 입자의 크기가 커져 실리카 입자의 표면 거칠기가 증가하므로 발수성이 증가하였다.

Water-repellent coating solutions were prepared by sol-gel method using tetraethoxysilane (TEOS) and methyltrimethoxysilane (MTMS) as precursors. The solutions were spin-coated on a cold-rolled steel sheet and thermally cured to prepare a non-fluorine water-repellent coating films. The effects of molar ratios of MTMS/TEOS, water concentration and ammonia concentration on the hydrophobic properties of the coating films were studied. The contact angle of water on coating films prepared by varying the molar ratio of MTMS/TEOS to 1~20 showed a maximum value of 108° when the MTMS/TEOS molar ratio was 10. With increasing water content, the coating films showed the larger contact angles and the better the water repellency. As the amount of ammonia added was increased, the contact angles of coating films were increased, showing the better the water repellency. It is considered that the larger the amount of ammonia added, the larger the size of the silica particles generated, which increases the surface roughness of the silica particles, thereby increasing the water repellency.

Keywords

Sol-Gel Method TEOS MTMS Non-fluorine Water Contact Angle Water-repellent Coating Solutions

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