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Related Experiment Videos

A Photocatalytically Active Lubricant-Impregnated Surface.

Sanghyuk Wooh1, Hans-Jürgen Butt1

  • 1Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany.

Angewandte Chemie (International Ed. in English)
|April 4, 2017
PubMed
Summary

Researchers developed a novel lubricant-impregnated surface (LIS) with both photocatalytic activity and superior liquid repellency. This advanced LIS enables efficient decomposition of organic compounds while maintaining stable liquid-repelling properties.

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Area of Science:

  • Materials Science
  • Surface Chemistry
  • Nanotechnology

Background:

  • Lubricant-impregnated surfaces (LISs) are known for low sliding angles.
  • Developing surfaces with combined functionalities like liquid repellency and catalytic activity is challenging.

Purpose of the Study:

  • To create a novel LIS with both enhanced liquid repellency and photocatalytic activity.
  • To investigate the stability and performance of this dual-function surface.

Main Methods:

  • Fabrication of a photocatalytic mesoporous TiO2 substrate.
  • Modification of the substrate surface by grafting polydimethylsiloxane (PDMS) brushes in a single step.
  • Utilizing residual non-bound PDMS as the lubricant.

Main Results:

Keywords:
liquid-repelling surfaceslubricant impregnated surfacephotocatalysispolydimethysiloxane brushslippery liquid-infused porous surfaces

Related Experiment Videos

  • Achieved ultra-low sliding angles below 1° for various liquids, including water, methanol, and fluorocarbons.
  • Demonstrated stable, long-term photocatalytic activity alongside retained liquid repellency.
  • Confirmed stable swelling of the grafted PDMS layer by the lubricant PDMS, preventing direct liquid-substrate contact.

Conclusions:

  • The developed LIS offers a stable, dual-functional platform combining extreme liquid repellency with photocatalysis.
  • This surface enables efficient photocatalytic reactions, such as organic decomposition, on repellent surfaces.
  • The chemically identical lubricant and hydrophobic layer ensure surface integrity and performance.