Icephobic Gradient Polymer Coatings Deposited via iCVD: A Novel Approach for Icing Control and Mitigation

Area of Science:

• Materials Science
• Surface Chemistry

Background:

• Ice formation and accretion pose significant challenges across various industries.
• Existing icephobic materials often lack the durability, scalability, or broad effectiveness required for widespread application.

Purpose of the Study:

• To develop and evaluate novel gradient polymer coatings for enhanced ice mitigation.
• To investigate the relationship between material structure, surface properties, and icephobic performance.

Main Methods:

• Fabrication of gradient polymer coatings using initiated chemical vapor deposition (iCVD) with 1,3,5,7-tetravinyl-1,3,5,7-tetramethylcyclotetrasiloxane (V4D4) and 1H,1H,2H,2H-perfluorodecyl acrylate (PFDA).
• Characterization of surface properties using grazing-incidence X-ray diffraction (GIXRD).
• Assessment of icephobic performance, including ice adhesion, freezing point depression, and nucleation inhibition.

Main Results:

• The gradient polymer coatings demonstrated significant reduction in ice adhesion and delayed drop freezing.
• Icephobicity was linked to surface energy discontinuities arising from the orientation of fluorinated groups.
• Optimizing surface crystallinity, rather than just wetting, further improved ice adhesion resistance.

Conclusions:

• Gradient polymers fabricated via iCVD offer a promising solution for effective ice control.
• These coatings address limitations of traditional fluorinated materials regarding adhesion, stability, and durability.
• The findings suggest potential for large-scale applications requiring robust ice mitigation strategies.