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Facile preparation of wear-resistant and anti-fingerprint hard coating with chemisorption of fluorosilane by simple wet coating
Journal of Sol-Gel Science and Technology ( IF 2.5 ) Pub Date : 2020-04-21 , DOI: 10.1007/s10971-020-05294-z
Kwanchan Chansomwong , Yun Hyeok Kim , Hyunhwan Lee , Byeong-Soo Bae

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 (~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.



中文翻译:

通过简单的湿涂法方便地制备具有氟硅烷化学吸附作用的耐磨和抗指纹硬质涂层

据报道,环氧-硅氧烷混合硬质涂层(HC)由于具有折衷的玻璃状硬度和塑料状柔韧性,因此可用于可折叠的显示器覆盖窗膜。另外,为了提供对HC具有耐磨性的抗指纹(AF)功能,在HC表面上添加持久的疏水功能是必不可少的。本文中,通过用简单的湿涂将氟硅烷化学吸附在HC上,报道了耐用的疏水性和耐磨性F-HC。源自TEOS的二氧化硅底漆可增加HC表面的羟基(–OH),然后改善与氟硅烷的溶胶-凝胶缩合反应。氟处理降低了摩擦系数以保持疏水性(< 在钢丝棉测试5000次和橡皮擦磨损测试2000次之后,初始水接触角的10%)和光学透明度(〜90%)。性能取决于等离子处理,退火条件和在HC表面进行的预处理,以便更强地吸收氟硅烷。

更新日期:2020-06-26
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