超滑表面防冰与疏冰机理研究

A new hydrophobic slippery liquid-infused porous surface is proposed to solve the failure problem of the superhydrophobic surface for anti-icing under high humidity condition. A novel hydrophobic slippery liquid-infused porous (HPO-SLIP) coating fabrication method is proposed based on the self-assembly technology. The HPO-SLIP coating surface is prepared by constructing a rough porous superhydrophobic substrate and then coating with lubricating oil. The wetting characteristics and microstructure of the HPO-SLIP surface are characterized. Finally, the anti-icing and icephobicity characteristics of the HPO-SLIP surface are investigated experimentally. The experimental results and a comparison with the superhydrophobic surface show that the condensation droplets on the HPO-SLIP surface freeze in isolation without ice bridging, and the ice propagation velocity of HPO-SLIP surface is lower. The contact between HPO-SLIP surface and condensation freezing droplets belongs to the solid-oil-solid contact model, and the dynamic migration distribution of the oil film affects ice nucleation and freezing. For the ice phobic properties, the ice adhesion shear strength of the HPO-SLIP surface is one order of magnitude lower than that of the hydrophilic surface. Compared with the hydrophilic surface, the superhydrophobic nano-grass surface and the superhydrophobic micro-nano composite surface, the HPO-SLIP surface has the highest anti-icing propagation and icephobicity performance, which can effectively reduce the ice accumulation.