Characterization of a novel super-hydrophilic coating film as a function of different spin coating speeds

• Published in: Journal of the Korean Physical Society 2013, 63(2), , pp.246-250
• Main Authors: Joung, Yeun-Ho, Choi, Won Seok, Shin, Yongtak, Lee, Minji, Kim, Heekon, Song, Woochang
• Format: Article
• Language: English
• Subjects: Mathematical and Computational Physics; Particle and Nuclear Physics; Physics; Physics and Astronomy; Theoretical; 물리학
• ISSN: 0374-4884; 1976-8524
• DOI: 10.3938/jkps.63.246

In this paper, the mechanical and the optical characteristics of a novel super-hydrophilic coating material (Wellture Finetech, Korea) are introduced according to the film thickness. Because a waterbased SiO 2 -abundant material has perfect transparency, as does glass, and a super-hydrophilic property, it can be used as a protection glass for a solar cell module. The film thickness was controlled by selecting several spin speeds in the coating process. After the coating process, the material was cured at around 290 °C for 20 minutes. The hardness of the film was measured using the ASTM D3363 test method, and the adhesion of the film was tested using the ASTM D3359 method. The surface conditions of the film were analyzed via scanning electron microscopy (SEM) and contact-angle measurements. A UV-visible spectrometer was used to measure the optical transmittance of the film. The anti-pollution property of the film (700 rpm) was also tested by pouring regular water on a permanent marker scratch.