Abstract
The elastic membranes with different surface stiffness were fabricated via spin-coating followed by the laser ablation. The as-fabricated elastic membrane exhibited superhydrophobicity with a rough microstructure. The droplet impacting experiment on the cold elastic superhydrophobic membrane was conducted, and the influence of surface stiffness and impacting speed on the droplet impacting process were investigated. It was found that the elastic superhydrophobic membrane exhibits a robust anti-icing performance compared with the elastic hydrophobic membrane. A lower surface stiffness corresponds to a larger deformation degree of the elastic membrane and to a smaller maximum droplet spreading diameter. Moreover, the contact time decreases with the increase of impacting speed as for the same stiffness of the cold elastic superhydrophobic membrane. The underlying mechanism of the cold elastic membrane with low ice adhesion may be due to the face that the deformation of the superhydrophobic membrane provides an elastic force for the droplet to detach from the surface and thus reduce the heat transfer between the droplet and the surface.
Highlights
Ice accumulation is a common and serious phenomenon that exists in numerous industrial fields such as electricity transportation, wind turbine and air conditioning [1,2,3]
Numerous investigations have been carried out to develop surfaces with anti-icing properties to reduce ice adhesion. Foremost among these studies is the use of slippery liquid-infused porous surfaces (SLIPS) [15,16,17], which is created by infiltrating the micro/nanostructured porous structures with a lubricating fluid
The pristine membrane surface is almost smooth without rough structures (Figure 3a), while after laser ablation, the surface is covered with microparticles, which
Summary
Ice accumulation is a common and serious phenomenon that exists in numerous industrial fields such as electricity transportation, wind turbine and air conditioning [1,2,3]. Developing an effective and reliable method to reduce ice accumulation is of great practical importance. Reducing ice adhesion of the droplet to the surface is considered as the most effective way to alleviate ice accumulation because it does not require of any external energy [12,13,14]. Numerous investigations have been carried out to develop surfaces with anti-icing properties to reduce ice adhesion. Foremost among these studies is the use of slippery liquid-infused porous surfaces (SLIPS) [15,16,17], which is created by infiltrating the micro/nanostructured porous structures with a lubricating fluid. The SLIPS may not be durable for practical applications
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