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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 November 19, 2018
Accepted December 11, 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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Tetraethoxysilane과 Chlorotrimethylsilane으로부터 PMMA 기재 위에 발수성 코팅 도막 제조

Preparation of Water-Repellent Coating Films from Tetraethoxysilane and Chlorotrimethylsilane on PMMA Substrates

박종호 이병화¹ 송기창^†

Jong Ho Park Byung Wha Lee¹ Ki Chang Song^†

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

Department of Biomedical Materials, Konyang University, 158 Gwanjeodong-ro, Seog-u, 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, February 2019, 57(1), 124-132(9), 10.9713/kcer.2019.57.1.124 Epub 31 January 2019

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Abstract

출발물질로서 TEOS (tetraethoxysilane)와 CTMS (chlorotrimethylsilane)를 사용하여 물과의 가수분해 및 중축합 반응에 의해 발수 코팅 용액을 합성하였다. 또한 이 용액을 PMMA 시트 위에 도포하고 열처리하여 비불소계 발수 코팅도막을 제조하였다. 코팅 도막은 수접촉각, UV-Vis 투과율 및 미세구조 관찰에 의해 분석되었다. CTMS/TEOS의 몰비를 0.6~1.0으로 변화시켜 제조 된 코팅 도막은 CTMS/TEOS의 몰 비가 0.8일 때 107o의 최대 접촉각을 나타내었다. 또한 코팅 도막은 CTMS/TEOS의 몰 비가 0.6~0.8일 때 90%의 높은 가시광선 투과율을 보였다. 그러나 CTMS/TEOS의 몰 비가 0.9~1.0인 경우에는 거친 표면의 불균일한 형상으로 인해 코팅 도막은 70% 이하의 낮은 투과율을 보였다.

Water-repellent coating solutions were synthesized by hydrolysis and polycondensation reactions with water using tetraethoxysilane (TEOS) and chlorotrimethylsilane (CTMS) as precursors. The solutions were coated on a PMMA sheet and thermally cured to prepare non-fluorinated water-repellent coating films. Coating films were characterized by water contact angles, UV-Vis transmittance and surface morphology. The contact angle of coating films prepared by varying the molar ratio of CTMS/TEOS to 0.6~1.0 exhibited a maximum value of 107o when the CTMS/TEOS molar ratio was 0.8. The coating films showed a high transmittance over the visible range up to 90% when the CTMS/ TEOS molar ratios were 0.6~0.8. However, when the molar ratios of CTMS/TEOS were 0.9~1.0, the transmittance of coating films was lower than 70% due to an uneven shape of the rough surface.

Keywords

Water-repellent coating solutions Tetraethoxysilane Chlorotrimethylsilane PMMA sheet Non-fluorinated Contact angles

References

Bakhshi M, Ozeiri M, Sharif A, Aalaie J, Korean J. Chem. Eng., 34(3), 903 (2017)
Kim DG, Lee BW, Song KC, Korean J. Chem. Eng., 56(3), 327 (2018)
Kim TK, Kang HJ, Park JH, Textile Coloration and Finishing, 29(2), 55 (2017)
Jeevajothi K, Subasri R, Raju KRCS, Ceram. Int., 39, 2111 (2013)
Yang H, Pi PH, Cai ZQ, Wen XF, Wang XB, Cheng J, Yang ZR, Appl. Surf. Sci., 256(13), 4095 (2010)
Kuo CFJ, Chen JB, Shih CY, Huang CY, J. Appl. Polym. Sci., 131(1), 40317 (2014)
ASTM D 3359, “Standard Test Methods for Measuring Adhesion by Tape Test,” ASTM International, 927-929(1997).