Slippery surfaces with high pressure stability, optical transparency, and self-healing characteristics

摘要

The present disclosure describes a strategy to create self-healing, slippery liquid-infused porous surfaces (SLIPS). Roughened (e.g., porous) surfaces can be utilized to lock in place a lubricating fluid, referred to herein as Liquid B to repel a wide range of materials, referred to herein as Object A (Solid A or Liquid A). SLIPS outperforms other conventional surfaces in its capability to repel various simple and complex liquids (water, hydrocarbons, crude oil and blood), maintain low-contact-angle hysteresis (<2.5°), quickly restore liquid-repellency after physical damage (within 0.1-1 s), resist ice, microorganisms and insects adhesion, and function at high pressures (up to at least 690 atm). Some exemplary application where SLIPS will be useful include energy-efficient fluid handling and transportation, optical sensing, medicine, and as self-cleaning, and anti-fouling materials operating in extreme environments.

主权项

1. An article having a repellant surface, the article comprising:
a substrate comprising a roughened surface having a predetermined roughness and one or more functional groups chemically attached to the roughened surface; and a lubricating liquid that has a chemical affinity to the substrate, as determined by an equilibrium contact angle of less than 90°, to wet spontaneously the substrate, the lubricating liquid wetting and adhering to the functionalized roughened surface to provided a stabilized liquid at a thickness sufficient to form a liquid overlayer above the functionalized roughened surface, wherein the predetermined roughness and the one or more functional groups are effective to substantially stably immobilize the lubricating liquid in, on and over the functionalized roughened surface, without dewetting from the substrate, to form a repellant surface.