Slippery liquid-infused porous electric heating coating for anti-icing and de-icing applications

摘要

Unexpected ice accretion on surfaces can cause well-known severe problems that will disturb normal function of aircrafts, wind turbines, high-speed trains and power lines, and seriously threaten the security of life and property. Here, we proposed a novel self-assembly method of fabricating slippery porous electric heating coating and characterized its static de-icing and dynamic anti-icing performance. Direct construction of close-aligned micropores on MWCNTs/polymer-based electric heating coating was realized by a simple breath figure method, and then silicone oil is infused into the micropores to achieve the slippery liquid infused porous electric heating coating (SEHC), which possesses superior "oil film isolating effect" for ultralow ice adhesion. De-icing tests demonstrated that SEHC can remarkably shorten the de-icing process and thus reduce electric heating energy consumption by up to 53%, and the thermal resistance-based heat transfer model of SEHC-ice interface has been adopted and the superiority of slippery electric heating coating in de-icing has been analyzed. Better durability of SEHC than superhydrophobic porous electric heating coating was confirmed by continuous high-speed scour tests, static icing/de-icing cycles and dynamic anti-icing tests. The semi-closed porous structure enhanced the immobilization of the infused oil even under dynamic conditions like high-speed airflow, and further ensured its long-lasting performance.