Self-cleaning superhydrophobic films by supersonic-spraying polytetrafluoroethylene-titania nanoparticles

Do Yeon Kim, Jong Gun Lee, Bhavana N. Joshi, Sanjay S. Latthe, Salem S. Al-Deyab, Suk Goo Yoon

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Spherical water drops show little or no adhesion to superhydrophobic surfaces due to the strong water repellence. Polytetrafluoroethylene (PTFE)-titania (TiO2) nanocomposite films were fabricated using a scalable, rapid and cost-effective technique: supersonic spray coating at room temperature. The wettability of the supersonic spray-coated nanocomposite films can be tuned to the Cassie-Baxter or Wenzel wetting states by simply varying the relative content of titania. This wettability tuning can also be used to adjust the surface morphology of the films, resulting in either a rough compact structure or a porous morphology. The static water contact angle and roll-off angles were measured for the nanocomposite films as a function of the titania content. Furthermore, water drop rebounding and water jet impact tests were performed on the nanocomposite films and their self-cleaning properties were investigated.

Original languageEnglish
Pages (from-to)3975-3983
Number of pages9
JournalJournal of Materials Chemistry A
Volume3
Issue number7
DOIs
Publication statusPublished - 2015 Feb 21

Fingerprint

Polytetrafluoroethylene
Spraying
Polytetrafluoroethylenes
Nanocomposite films
Cleaning
Titanium
Nanoparticles
Water
Wetting
Contact angle
Surface morphology
Adhesion
Tuning
titanium dioxide
Coatings
Costs
Temperature

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Self-cleaning superhydrophobic films by supersonic-spraying polytetrafluoroethylene-titania nanoparticles. / Kim, Do Yeon; Lee, Jong Gun; Joshi, Bhavana N.; Latthe, Sanjay S.; Al-Deyab, Salem S.; Yoon, Suk Goo.

In: Journal of Materials Chemistry A, Vol. 3, No. 7, 21.02.2015, p. 3975-3983.

Research output: Contribution to journalArticle

Kim, Do Yeon ; Lee, Jong Gun ; Joshi, Bhavana N. ; Latthe, Sanjay S. ; Al-Deyab, Salem S. ; Yoon, Suk Goo. / Self-cleaning superhydrophobic films by supersonic-spraying polytetrafluoroethylene-titania nanoparticles. In: Journal of Materials Chemistry A. 2015 ; Vol. 3, No. 7. pp. 3975-3983.
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