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Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications
Published on: August 15, 2018
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Multiscale crack initiator promoted super-low ice adhesion surfaces
Zhiwei He1, Senbo Xiao, Huajian Gao
1NTNU Nanomechanical Lab, Department of Structural Engineering, Norwegian University of Science and Technology (NTNU), Trondheim 7491, Norway. zhiliang.zhang@ntnu.no.
Soft Matter
|September 13, 2017
Summary
Researchers developed a novel surface design to minimize ice adhesion by over 50%. This approach uses integrated crack initiators to reduce ice sticking to surfaces, crucial for technology and safety.
Area of Science:
- Materials Science
- Surface Engineering
- Tribology
Background:
- Preventing ice accumulation on surfaces is critical for safety and technological applications.
- Existing methods focus on suppressing ice nucleation, which remains challenging.
- A practical approach involves minimizing ice adhesion to surfaces.
Purpose of the Study:
- To develop a strategy for significantly reducing ice adhesion on surfaces.
- To investigate the effectiveness of multiscale crack initiation mechanisms for low ice adhesion.
Main Methods:
- Designed and fabricated polydimethylsiloxane (PDMS) coatings with integrated nano- and micro-crack initiators.
- Introduced sub-structures into smooth PDMS surfaces to promote macro-crack initiation.
- Measured ice adhesion forces using fracture mechanics principles.
Main Results:
- The novel surface design reduced ice adhesion by at least approximately 50%.
- Achieved a minimum ice adhesion of 5.7 kPa, independent of curing conditions or structural variations.
- Demonstrated the effectiveness of multiscale crack initiators in lowering ice adhesion.
Conclusions:
- Integrated multiscale crack initiators offer a versatile strategy for designing super-low ice adhesion surfaces.
- This approach provides a realistic roadmap for managing ice on surfaces by minimizing adhesion.
- The findings have implications for developing ice-repellent technologies.
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