화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Chemical Engineering Research, Vol.57, No.2, 177-184, April, 2019
DOI10.9713/kcer.2019.57.2.177  Export Citation
Methyltrimethoxysilane과 Trimethylethoxysilane을 이용한 비불소계 발수 코팅 도막의 제조
Preparation of Non-Fluorinated Water Repellent Coating Films Using Methyltrimethoxysilane and Trimethylethoxysilane
김동구, 이병화1, 송기창†
  • 건양대학교 의료신소재학과, 35365 대전 서구 관저동로 158
  • 1대흥화학공업(주) 기술연구소, 17746 경기도 평택시 산단로 64번길 68
Dong Gu Kim, Byoung Hwa Lee1, and Ki Chang Song†
  • Department of Biomedical Materials, Konyang University, 158, Gwanjeodong-ro, Seo-gu, Daejeon, 35365, Korea
  • 1Research Institute of Daeheung Chemical Industry Co., 68, 64, Beon-gil, Sandan-ro, Pyeongtack-si, Gyeonggi-do, 17746, Korea
E-mail:
초록
Methyltrimethoxysilane (MTMS)과 trimethylethoxysilane (TMES)을 전구체로 사용하여 비 불소계 발수 코팅 용액을 제조하였다. 이 코팅 용액을 냉연 강판 위에 스핀 코팅하고 열 경화시켜 발수 코팅 도막을 제조 하였다. 이 과정 중 코팅 도막의 소수성에 미치는 TMES/MTMS의 몰 비 영향이 연구되었다. 코팅 도막의 소수성은 접촉각 측정, 표면 형상분석 및 적외선 분광법을 사용하여 연구되었다. TMES/MTMS의 몰 비를 0에서 30까지 변화 시켰을 때, 코팅되지 않은 냉연강판의 접촉각은 30°인 반면에 TMES/MTMS의 몰 비가 1인 경우는 접촉각이 104°로 크게 증가하여 발수성이 향상되었다. 또한 TMES/MTMS의 몰 비가 10, 15, 25, 30인 경우는 각각 접촉각이 109°, 114°, 117°, 144°로 TMES/MTMS의 몰 비가 증가할수록 냉연강판의 접촉각이 점차 증가하는 경향을 보였다. 이때 코팅 도막의 소수성은 표면 거칠기의 증가와 코팅 표면에서의 메틸 성분의 함량 증가로 인해 향상되었다. 특히 TMES/MTMS의 몰 비가 30인 경우에는 TMES의 메틸기로 인한 발수성뿐만 아니라 표면 입자의 존재로 인해 전체적인 표면 거칠기가 크게 증가하였기 때문에 144°의 초발수성을 나타내었다.
Non-fluorinated water repellent coating solutions were obtained using methyltrimethoxysilane (MTMS) and trimethylethoxysilane (TMES) as precursors. The solutions were spin-coated on a cold-rolled steel sheet and cured thermally to prepare water repellent coating films. During this process, the effect of molar ratio of TMES/MTMS was studied for the hydrophobic properties of the coating films. Hydrophobic properties of coating films were characterized using contact angle measurement, surface morphology analysis and infrared spectroscopy. When the molar ratio of TMES/MTMS was varied from 0 to 30, the contact angle of the un-coated cold-rolled steel sheet was 30°, whereas when the molar ratio of TMES/MTMS was 1, the contact angle increased to 104° and water repellency was significantly improved. In the case of TMES/MTMS molar ratios of 10, 15, 25 and 30, the contact angles of coating films showed 109°, 114°, 117° and 144°, respectively. At this time, the hydrophobicity of the coating films was improved by the increase of the surface roughness and the content of the methyl component at the coating surface. In particular, when the molar ratio of TMES/MTMS was 30, the overall surface roughness was greatly increased due to the presence of surface particles as well as the water repellency due to methyl groups of TMES, resulting in super hydrophobicity of 144°.
Keywords:Methyltrimethoxysilane;Trimethylethoxysilane;Non-florinated;Water repellent;Coating films;Contact angle;Cold-rolled steel sheet
  1. Kim T, Jeong J, Chung I, J. Adhes. Interface, 16, 116 (2015)
  2. Lv C, Wang H, Liu Z, Wang C, Li H, Zhao Y, Zhu Y, Prog. Org. Coat., 110, 47 (2017)
  3. Jeevajothi K, Subasri R, Raju RCS, Ceramics International, 39, 2111 (2013)
  4. Kim TK, Kang HJ, Park JH, Textile Coloration Finishing, 29(2), 55 (2017)
  5. Castellino V, Cheng YL, Acosta E, J. Colloid Interface Sci., 353(1), 196 (2011)
  6. Kim DG, Lee BW, Song KC, Korean Chem. Eng. Res., 56(3), 327 (2018)
  7. Yang H, Pi PH, Cai ZQ, Wen XF, Wang XB, Cheng J, Yang ZR, Appl. Surf. Sci., 256(13), 4095 (2010)
  8. Park JH, Lee BW, Song KC, Korean Chem. Eng. Res., in press (2019).
  9. ASTM D 3359, “Standard Test Methods for Measuring Adhesion by Tape Test,” ASTM International, 927-929(1997).
  10. Kuo CFJ, Chen JB, Shih CY, Huang CY, J. Appl. Polym. Sci., 131, 40317 (2014)