Abstract
Although thousands of superhydrophobic coatings have been reported, transparent ones with high durability are rare. Here, transparent and durable superhydrophobic coatings were prepared by using multiwalled carbon nanotubes (MWCNTs) as the templates. The superhydrophobic coatings were prepared by spray-coating the homogeneous suspension of polysiloxane-modified MWCNTs (MWCNTs@POS) in toluene onto glass slides, calcination in air at 500°C to form the silica nanotubes (SNTs), and then chemical vapor deposition of polydimethylsiloxane at 200°C onto the surface of the SNTs coatings. The MWCNTs@POS suspension was prepared by hydrolytic condensation of hexadecyltrimethoxysilane and tetraethoxysilane on the surface of MWCNTs. The coatings showed excellent superhydrophobicity (water contact angle=166.6°, sliding angle=1°) and high transparency (83.1% at 600nm). In addition, the transparent superhydrophobic coatings featured high mechanical, chemical and thermal durability. The coatings retained the excellent superhydrophobicity after intensive water jetting at 100kPa for 60min, immersion in various corrosive liquids for 24h, or kept at 390°C for 1h. Moreover, the transparent and durable superhydrophobic coatings exhibited very good anti-bioadhesive properties.
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