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Updated: Jan 25, 2026

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification
Published on: April 7, 2017
Smooth and Transparent Films Showing Paradoxical Surface Properties: The Lower the Static Contact Angle, the Better
Sohei Kaneko1, Chihiro Urata2, Tomoya Sato2
1Nippon Paint Surf Chemicals. Co., Ltd. , 4-1-15 Minami-Shinagawa , Shinagawa , Tokyo 140-8675 , Japan.
Abstract:
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.
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