Self-cleaning transparent superhydrophobic coatings through simple sol-gel processing of fluoroalkylsilane

Shanhu Liu, Xiaojing Liu, Sanjay S. Latthe, Li Gao, Seongpil An, Suk Goo Yoon, Baoshun Liu, Ruimin Xing

Research output: Contribution to journalArticle

92 Citations (Scopus)

Abstract

Upon contact with a dusty superhydrophobic surface, moving spherical water drops collect the dust particles and eventually flow off the surface. Herein, we report a very simple one-step approach to fabricate transparent and self-cleaning superhydrophobic coatings via the sol-gel processing of long-chain fluoroalkylsilane. The coating surface exhibited a rough, wrinkled, hill-like morphology similar to the microstructure of the lotus leaf (rough micro-scale papillae), which is promising for superhydrophobicity. The air bags trapped in the rough, hill-like structure allow the water drops to take a round shape with a contact angle of 169°. These round water drops abruptly roll off the coating surface at less than 5°of tilting. No major or minor water-drop pinning was observed during the roll off. The dust-repellent (self-cleaning) property, plastron stability, and durability against water-jet impact were examined on the superhydrophobic coatings.

Original languageEnglish
Pages (from-to)897-903
Number of pages7
JournalApplied Surface Science
Volume351
DOIs
Publication statusPublished - 2015 Oct 1

Fingerprint

Sol-gels
Cleaning
Coatings
Water
Processing
Dust
Particles (particulate matter)
Contact angle
Durability
Microstructure

Keywords

  • Dip coating
  • Lotus leaf
  • Plastron layer
  • Self-cleaning
  • Sol-gel process
  • Superhydrophobic

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

Cite this

Self-cleaning transparent superhydrophobic coatings through simple sol-gel processing of fluoroalkylsilane. / Liu, Shanhu; Liu, Xiaojing; Latthe, Sanjay S.; Gao, Li; An, Seongpil; Yoon, Suk Goo; Liu, Baoshun; Xing, Ruimin.

In: Applied Surface Science, Vol. 351, 01.10.2015, p. 897-903.

Research output: Contribution to journalArticle

Liu, Shanhu ; Liu, Xiaojing ; Latthe, Sanjay S. ; Gao, Li ; An, Seongpil ; Yoon, Suk Goo ; Liu, Baoshun ; Xing, Ruimin. / Self-cleaning transparent superhydrophobic coatings through simple sol-gel processing of fluoroalkylsilane. In: Applied Surface Science. 2015 ; Vol. 351. pp. 897-903.
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