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Ambient Climate Influences Anti-Adhesion between Biomimetic Structured Foil and Nanofibers
Marco Meyer1, Gerda Buchberger2, Johannes Heitz2
1Institute for Biology II, RWTH Aachen, Worringerweg 3, 52074 Aachen, Germany.
Nanomaterials (Basel, Switzerland)
|December 24, 2021
Summary
Researchers mimicked spider silk technology to create anti-adhesive nanofiber surfaces. These surfaces lose their non-stick properties above 30°C, enabling potential temperature-sensitive switches for material handling.
Area of Science:
- Biomimetics
- Materials Science
- Surface Engineering
Background:
- Nanofibers possess a high surface-to-volume ratio, beneficial for applications but causing adhesion issues due to van der Waals forces.
- The cribellate spider Uloborus plumipes uses a calamistrum with rippled nanotopography to process nanofibers without adhesion, serving as a biomimetic model.
Purpose of the Study:
- To recreate the spider's anti-adhesion nanotopography on artificial surfaces using laser-induced periodic surface structures (LIPSS).
- To investigate the influence of climatic conditions, specifically humidity and temperature, on the anti-adhesive performance of these biomimetic surfaces.
Main Methods:
- Fabrication of artificial surfaces with nanotopography mimicking the spider's calamistrum using LIPSS.
- Testing the anti-adhesive performance of these surfaces under varying humidity and temperature conditions.
Main Results:
- The biomimetic surfaces demonstrated effective anti-adhesion at both low and high humidity levels.
- A significant loss of anti-adhesive properties was observed at temperatures exceeding 30°C.
Conclusions:
- The developed nanotopography effectively mimics the anti-adhesive properties of the spider's calamistrum.
- The temperature sensitivity of the anti-adhesion effect presents an opportunity for creating temperature-responsive switches for nanofiber handling.
