Magnetic slippery extreme icephobic surfaces.

Area of Science:

• Materials Science
• Surface Engineering
• Physics

Background:

• Anti-icing surfaces are crucial for transportation, infrastructure, and energy systems, but effective solutions for low temperatures are limited.
• Existing icephobic surfaces (non-wetting, liquid-infused) face challenges with high freezing temperatures, strong ice adhesion, and high costs.
• The development of robust and cost-effective anti-icing strategies remains a significant technological hurdle.

Purpose of the Study:

• To develop novel magnetic slippery surfaces with superior anti-icing properties.
• To overcome the limitations of current icephobic surface technologies, including freezing temperature, ice adhesion, and cost.
• To demonstrate the universality and practical applicability of these new surfaces.

Main Methods:

• Exploitation of magnetic volumetric force to decouple ice formation from the solid-liquid interface.
• Fabrication of magnetic slippery surfaces applicable to various solid substrates without micro/nano-structuring.
• Characterization of ice formation temperature, ice adhesion strength, and stability under shear flow.

Main Results:

• Achieved a significantly low ice formation temperature of -34°C.
• Demonstrated a 2-3 orders of magnitude increase in ice formation delay time compared to state-of-the-art surfaces.
• Recorded extremely low ice adhesion strength (approximately 2 Pa) and stability in shear flows up to Reynolds number 10^5.
• Confirmed the universality of the surfaces, applicable to all solid types without surface structuring.

Conclusions:

• The developed magnetic slippery surfaces offer unprecedented anti-icing performance, surpassing current technologies.
• The novel approach utilizing magnetic volumetric forces provides a cost-effective and universal solution for anti-icing applications.
• These surfaces hold significant potential for widespread implementation in critical infrastructure and transportation systems.