Journal
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
Volume 95, Issue 2, Pages 447-455Publisher
SPRINGER
DOI: 10.1007/s10971-020-05294-z
Keywords
Transparent hard coating; Hydrophobic surface; Abrasion resistance; Surface treatment; Fluorosilane; Anti-fingerprint
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Funding
- Wearable Platform Materials Technology Center (WMC) - National Research Foundation of Korea (NRF) - Korean Government (MSIP) [NRF-2016R1A5A1009926]
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Epoxy-siloxane hybrid hard coating (HC) has been reported to be applicable to foldable display cover window film due to its glass-like hardness and plastic-like flexibility, which are trade-off characteristics. In addition, to provide an anti-fingerprint (AF) function with abrasion resistance to HC, the addition of a durable hydrophobic function on the HC surface is essential. Herein, durable hydrophobic and abrasion resistant F-HC was reported by chemical adsorption of fluorosilane on HC with simple wet coating. TEOS-derived silica primer increased the hydroxyl groups (-OH) on surface of HC, then it improved the sol-gel condensation with fluorosilane. The fluoro-treatment reduced the coefficient of friction to maintain hydrophobicity (<10% of the initial water contact angle) and optical transparency (similar to 90%) after 5000 cycles of a steel-wool test and 2000 cycles of an eraser abrasion test. Performance was dependent on plasma treatment, annealing condition, and pretreatment on the HC surface for the stronger chemisorption of fluorosilane. [GRAPHICS] .
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