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Tunable Lotus Leaf Effect by Three-Dimensionally Printed Stretchable Objects.

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  • 1Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel.

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Summary
This summary is machine-generated.

Researchers developed 3D printed, stretchable superhydrophobic surfaces using silicone urethane and silica particles. These tunable lotus-like structures offer reversible control over water repellency for advanced applications.

Keywords:
3D printingparticlessoft materialssuperhydrophobicitytuned wettability

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Area of Science:

  • Materials Science
  • Surface Chemistry
  • Soft Robotics

Background:

  • Adjustable wettability is crucial for droplet manipulation and surface adhesion.
  • Superhydrophobic surfaces mimic natural phenomena like the lotus leaf effect.
  • Developing durable and tunable superhydrophobic materials remains a challenge.

Purpose of the Study:

  • To create high-resolution 3D stretchable structures with tunable superhydrophobicity.
  • To investigate the fabrication of these structures using stereolithography.
  • To demonstrate the control over wetting properties through mechanical deformation.

Main Methods:

  • Stereolithography-based 3D printing using nonfluorinated silicone urethane monomers and hydrophobic silica particles.
  • Design and fabrication of 3D lotus-like structures with microsize pillars.
  • Characterization of superhydrophobicity using contact and rolling angle measurements.
  • Testing durability under various conditions including stretching, water immersion, and heat exposure.

Main Results:

  • Achieved superhydrophobic surfaces with a contact angle of 153.3° ± 1.3° and rolling angle of 3.3° ± 0.5°.
  • Demonstrated self-cleaning, water repellency, and buoyancy properties.
  • Confirmed preservation of superhydrophobicity after stretching, water immersion, and heat exposure.
  • Showcased reversible tuning of wetting properties by stretching the structures.

Conclusions:

  • The developed 3D printed stretchable structures offer tunable superhydrophobicity via mechanical deformation.
  • The nonfluorinated, silica-particle-based approach provides a durable and versatile method for creating advanced wetting surfaces.
  • This technology holds potential for applications in soft robotics, biomedical devices, and stretchable electronics.