Highly Efficient Photothermal Icephobic/de-Icing MOF-Based Micro and Nanostructured Surface

Area of Science:

• Materials Science
• Surface Engineering
• Nanotechnology

Background:

• Photothermal materials are crucial for energy-efficient anti-/de-icing solutions.
• Developing hierarchical structures with both long icing delay and efficient de-icing remains a challenge.

Purpose of the Study:

• To present a novel photothermal icephobic MOF-based micro and nanostructure surface (MOF-MNS).
• To investigate the anti-/de-icing performance of the MOF-MNS under various conditions.

Main Methods:

• Fabrication of a hierarchical surface combining micron grooves and fluorinated MOF nanowhiskers.
• Characterization of solar absorption, photothermal conversion efficiency, and icing delay/de-icing performance.
• Evaluation of mechanical robustness, chemical stability, and self-cleaning properties.

Main Results:

• The optimal MOF-M250 NS achieved over 98% solar absorption and a 65.5 °C temperature increment.
• An unprecedented icing delay of ~3960 s at -18 °C was recorded without solar illumination.
• Rapid de-icing within 720 s under 1-sun illumination with a rate of 5.8 kg m⁻² h⁻¹ was demonstrated.

Conclusions:

• The MOF-MNS offers superior photothermal conversion and icephobic properties.
• This material presents a highly effective and durable solution for anti-/de-icing in harsh environments.
• The hierarchical structure synergistically enhances the performance of icephobic surfaces.