1. Frost Delay of a Water-Absorbing Surface with Engineered Wettability via Nonfreezing Water
- Author
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Bishwash Shrestha, Mohammadamin Ezazi, Vahid Rad, Anjana Maharjan, and Gibum Kwon
- Subjects
Acrylates ,Freezing ,Temperature ,Wettability ,Electrochemistry ,Water ,General Materials Science ,Surfaces and Interfaces ,Condensed Matter Physics ,Spectroscopy - Abstract
Frost is common when a solid surface is subjected to a humid and cold environment. It can cause various inconveniences, complications, or fatal accidents. Water-repellent surfaces have demonstrated an antifreezing capability by enabling the water droplets to roll or bounce off before they freeze. However, these surfaces are often limited by their inability to shed the small water condensates, which can eventually grow and freeze. Recently, surfaces that can rapidly absorb and hydrogen bond with these water condensates have demonstrated significant delay in frost formation and growth. This is attributed to a lower freezing temperature of the absorbed water which makes it stay in a nonfreezing state. Herein, we report a surface with preferential wettability of water over oil (i.e., superhydrophilic and oleophobic wettability) that can significantly delay frost formation. The surface is fabricated by copolymerizing poly(ethylene glycol) diacrylate (PEGDA) and perfluorinated acrylate (1
- Published
- 2022