Highly durable superhydrophobic coatings with gradient density by movable spray method

Mizuki Tenjimbayashi, Seimei Shiratori

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Superhydrophobic surface is expected to be applied in anti-fouling, anti-icing, and anti-bacterial. However, practical use is interrupted by low mechanical strength, time-consuming process, and limited coating substrate. Here highly durable superhydrophobic coatings were prepared by simple and novel spraying method, which sprays with changing the "spray distance between substrate and spray" (SD), named "movable spray method." We prepared the solution that changes wettability and durability with spraying distance by mixing SiO2nanoparticles and ethyl alpha cyanoacrylate polymer (EAC). Then, we evaluated the chemical components and surface morphologies of each spraying distance coatings (0 ∼ 50 cm) by XPS, SEM, and laser scanning microscope. It revealed that surface roughness and SiO2/EAC ratio increased as the SD increases. Thus, durable superhydrophobic coatings were designed by spraying with increasing SD gradually. Glow discharge-optical emission spectrometry analysis revealed that designed coatings showed the gradual increase of SiO2/EAC ratio. As a result, coatings prepared on glass, wood, or aluminum substrates maintained their superhydrophobicity up to the abrasion at 40 kPa. This movable spray method is simple coating by the wet process and prepares robust hydrophobic coating on complex shape and large area substrates. The gradient functional surface was found to have mechanical durability and superhydrophobicity, and wide area applications will be expected.

Original languageEnglish
Article number114310
JournalJournal of Applied Physics
Volume116
Issue number11
DOIs
Publication statusPublished - 2014 Sep 21

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sprayers
coatings
spraying
gradients
durability
polymers
antifouling
ice formation
abrasion
wettability
glow discharges
light emission
coating
surface roughness
microscopes
aluminum
scanning electron microscopy
scanning
glass
spectroscopy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Highly durable superhydrophobic coatings with gradient density by movable spray method. / Tenjimbayashi, Mizuki; Shiratori, Seimei.

In: Journal of Applied Physics, Vol. 116, No. 11, 114310, 21.09.2014.

Research output: Contribution to journalArticle

Tenjimbayashi, Mizuki ; Shiratori, Seimei. / Highly durable superhydrophobic coatings with gradient density by movable spray method. In: Journal of Applied Physics. 2014 ; Vol. 116, No. 11.
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