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http://dx.doi.org/10.9713/kcer.2019.57.1.124

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

Park, Jong Ho (Department of Biomedical Materials, Konyang University)
Lee, Byung Wha (Research Institute of Daeheung Chemical Industry Co.)
Song, Ki Chang (Department of Biomedical Materials, Konyang University)
Publication Information
Korean Chemical Engineering Research / v.57, no.1, 2019 , pp. 124-132 More about this Journal
Abstract
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 $107^{\circ}$ 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;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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