Superoleophobic Slippery Lubricant-Infused Surfaces: Combining Two Extremes in the Same Surface

Research output: Contribution to journalArticleScientificpeer-review

Researchers

Research units

  • Shaanxi University of Science and Technology
  • Karlsruhe Institute of Technology
  • East China University of Science and Technology

Abstract

The ability to create superoleophobic surfaces repellent toward low-surface-tension liquids is important for various applications, and has been recently demonstrated using re-entrant or doubly re-entrant microtopography. Liquid droplets on such surfaces feature composite liquid–solid–air interfaces, whereas composite liquid–lubricant–air interfaces would have potential for additional repellency. Here, the development of a novel slippery superoleophobic surface with low adhesion is demonstrated via combining doubly re-entrant microtopography with slippery lubricant-infused porous surfaces. This is realized by using 3D direct laser writing to fabricate doubly re-entrant micropillars with dedicated nanostructures on top of each pillar. The top nanostructures stabilize the impregnated slippery lubricant, while the re-entrant geometry of the micropillars prevents lubricant from spreading. The slippery layer reduces the adhesion of liquid to the pillars, as proved using scanning droplet adhesion microscopy (SDAM), while the doubly re-entrant micropillars make the surface superoleophobic. This novel interface combining two extremes, superoleophobicity and slippery lubricant-infused surface, is of importance for designing superoleophobic and superhydrophobic surfaces with advanced liquid repellent, anti-icing, or anti-fouling properties.

Details

Original languageEnglish
Article number1803890
Number of pages7
JournalAdvanced Materials
Volume30
Issue number45
Publication statusPublished - Aug 2018
MoE publication typeA1 Journal article-refereed

    Research areas

  • direct laser writing, doubly re-entrant, low adhesion force, slippery surfaces, superoleophobicity

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