Smooth and Transparent Films Showing Paradoxical Surface Properties: The Lower the Static Contact Angle, the Better the Water Sliding Performance

Smooth and Transparent Films Showing Paradoxical Surface Properties: The Lower the Static Contact Angle, the Better the Water Sliding Performance

Smooth and transparent hydrophilic films showing excellent water sliding properties were prepared by using a sol–gel solution of 2-[methoxy (ethyleneoxy)10 propyl]­trimethoxysilane and tetraethoxysilane. The resulting hybrid films were statically hydrophilic (static water contact angles (CAs) were i...

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Veröffentlicht in:Langmuir 2019-05, Vol.35 (21), p.6822-6829
Hauptverfasser: Kaneko, Sohei, Urata, Chihiro, Sato, Tomoya, Hönes, Roland, Hozumi, Atsushi
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container_end_page 6829
container_issue 21
container_start_page 6822
container_title Langmuir
container_volume 35
creator Kaneko, Sohei
Urata, Chihiro
Sato, Tomoya
Hönes, Roland
Hozumi, Atsushi
description Smooth and transparent hydrophilic films showing excellent water sliding properties were prepared by using a sol–gel solution of 2-[methoxy (ethyleneoxy)10 propyl]­trimethoxysilane and tetraethoxysilane. The resulting hybrid films were statically hydrophilic (static water contact angles (CAs) were in the range of 30–45°), but water droplets (50 μL) could move smoothly on an inclined surface (minimum sliding angle was 6°) without pinning or tailing because of low CA hysteresis (5 ± 1°). Thanks to this hybrid film formation on aluminum (Al) substrate, drainage performance during condensation and frosting/defrosting markedly improved compared to that on hydrophilic, bare Al, or hydrophobic monolayer-covered Al substrates.
doi_str_mv 10.1021/acs.langmuir.9b00206
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title Smooth and Transparent Films Showing Paradoxical Surface Properties: The Lower the Static Contact Angle, the Better the Water Sliding Performance
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