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Related Concept Videos

Frost Action on Concrete01:27

Frost Action on Concrete

318
Concrete structures in cold climates, such as those along roadsides, can retain moisture. This moisture makes them susceptible to frost-related damage when temperatures fall below freezing. Adding moisture worsens the damage during temperature fluctuations, leading to repeated freezing and thawing. De-icing salts, spread over these structures to melt ice, add to the freeze-thaw cycle, and draw even more moisture into the concrete.
This freeze-thaw cycle primarily causes surface scaling, where...
318
Frost Resistant Concrete01:29

Frost Resistant Concrete

315
Concrete's susceptibility to frost damage during freeze-thaw cycles demands strategic measures to enhance its frost resistance. Employing techniques like air entrainment, adjusting the water-cement ratio, proper curing, and selecting appropriate aggregates are essential.
Introducing microscopic air bubbles into the concrete mix through air entrainment creates small voids that accommodate ice expansion, thereby reducing internal pressures and preventing cracking. The optimal amount of...
315

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Related Experiment Video

Updated: Dec 23, 2025

Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications
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Rationally designed surface microstructural features for enhanced droplet jumping and anti-frosting performance.

Guanlei Zhao1, Guisheng Zou2, Wengan Wang2

  • 1Department of Mechanical Engineering, State Key Laboratory of Tribology, Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Ministry of Education of PR China, Tsinghua University, Beijing 100084, China. liulei@tsinghua.edu.cn and Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. lvjianyong@iccas.ac.cn wangj220@iccas.ac.cn.

Soft Matter
|April 24, 2020
PubMed
Summary
This summary is machine-generated.

Optimizing surface microstructures enhances water droplet removal via jumping, significantly improving anti-frosting performance for heat exchangers. This reduces frost buildup and delays frosting over 90 minutes.

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Area of Science:

  • Materials Science
  • Surface Engineering
  • Heat Transfer

Background:

  • Frost accretion on heat exchangers reduces efficiency in cold environments.
  • Droplet jumping from micro/nanostructured surfaces is a key anti-frosting strategy.
  • Understanding microstructural effects on droplet jumping is crucial for optimization.

Purpose of the Study:

  • Investigate the relationship between micro-cone array features and water droplet removal.
  • Optimize surface structures for enhanced anti-frosting performance.
  • Clarify the transition from partial wetting to Cassie state for efficient water removal.

Main Methods:

  • Fabrication of aluminum surfaces with varied micro-cone arrays using laser processing and etching.
  • Statistical analysis of condensation processes to evaluate water removal.
  • Condensation experiments measuring water removal rates over time.

Main Results:

  • Enhanced water removal from 3.42 g m⁻² to 13.91 g m⁻² with optimized micro-cone sizes (10-40 μm).
  • Achieved transition from high-adhesion partial wetting to low-adhesion Cassie state.
  • Optimal structures showed minimal water accumulation and over 90 minutes of frosting delay.

Conclusions:

  • Microstructure size critically influences droplet jumping and water removal efficiency.
  • Optimized micro-cone structures provide superior anti-frosting capabilities.
  • This research offers a pathway for designing advanced anti-frosting surfaces.