Capillary Balancing: Designing Frost-Resistant Lubricant-Infused Surfaces.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 33206541.
- Also identified by DOI 10.1021/acs.nanolett.0c02956 and PMC identifier 7735743.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Slippery lubricant-infused surfaces (SLIPS) have shown great promise for anti-frosting and anti-icing. However, small length scales associated with frost dendrites exert immense capillary suction pressure on the lubricant. This pressure depletes the lubricant film and is detrimental to the functionality of SLIPS. To prevent lubricant depletion, we demonstrate that interstitial spacing in SLIPS needs to be kept below those found in frost dendrites. Densely packed nanoparticles create the optimally sized nanointerstitial features in SLIPS (Nano-SLIPS). The capillary pressure stabilizing the lubricant in Nano-SLIPS balances or exceeds the capillary suction pressure by frost dendrites. We term this concept capillary balancing. Three-dimensional spatial analysis via confocal microscopy reveals that lubricants in optimally structured Nano-SLIPS are not affected throughout condensation (0 °C), extreme frosting (-20 °C to -100 °C), and traverse ice-shearing (-10 °C) tests. These surfaces preserve low ice adhesion (10-30 kPa) over 50 icing cycles, demonstrating a design principle for next-generation anti-icing surfaces.