A Fluorine-free Slippery Surface with Hot Water Repellency and Improved Stability against Boiling

Ryo Togasawa, Mizuki Tenjimbayashi, Takeshi Matsubayashi, Takeo Moriya, Kengo Manabe, Seimei Shiratori

Research output: Contribution to journalArticlepeer-review

49 Citations (Scopus)


Inspired by natural living things such as lotus leaves and pitcher plants, researchers have developed many excellent antifouling coatings. In particular, hot-water-repellent surfaces have received much attention in recent years because of their wide range of applications. However, coatings with stability against boiling in hot water have not been achieved yet. Long-chain perfluorinated materials, which are often used for liquid-repellent coatings owing to their low surface energy, hinder the potential application of antifouling coatings in food containers. Herein, we design a fluorine-free slippery surface that immobilizes a biocompatible lubricant layer on a phenyl-group-modified smooth solid surface through OH-π interactions. The smooth base layer was fabricated by modification of phenyltriethoxysilane through a sol-gel method. The π-electrons of the phenyl groups interact with the carboxyl group of the oleic acid used as a lubricant, which facilitates immobilization on the base layer. Water droplets slid off the surface in the temperature range from 20 to 80 °C at very low sliding angles (<2°). Furthermore, we increased the π-electron density in the base layer to strengthen the OH-π interactions, which improved long-term boiling stability under hot water. We believe that this surface will be applied in fields in which the practical use of antifouling coatings is desirable, such as food containers, drink cans, and glassware.

Original languageEnglish
Pages (from-to)4198-4205
Number of pages8
JournalACS Applied Materials and Interfaces
Issue number4
Publication statusPublished - 2018 Jan 31


  • OH-π interaction
  • boiling stability
  • fluorine-free
  • hot water repellency
  • slippery surface

ASJC Scopus subject areas

  • General Materials Science


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