NIR‐Triggered Photothermal Responsive Coatings with Remote and Localized Tunable Underwater Oil Adhesion

Abstract

Tunable underwater oil adhesion is a critical issue in interfacial science and industrial applications. Although much progress has been made to date, development of novel smart coating materials that can selectively change the wetting property at different areas is considerably scarce. Here, a simple strategy is proposed to fabricate photothermal responsive coatings, which can change the oil adhesion behavior from low‐adhesive rolling state to high‐adhesive pinning state for a variety of oily liquids in a remote, local, and reversible manner. Owing to this unique controllability, the adhesion and no‐adhesion of oil droplets on the coated surfaces can be easily manipulated by remote and local near‐infrared radiation.

3D MXene Sponge: Facile Synthesis, Excellent Hydrophobicity, and High Photothermal Efficiency for Waste Oil Collection and Purification

“…Until now, multiple photothermal agents have been explored for the fabrication of superhydrophobic surfaces, such as carbon nanotubes (CNTs), graphene, candle soot, MXenes, inorganic nanomaterials, and thermopolymers . As a rapidly developing class of 2D materials, MXenes show strong absorption in the near-infrared region , and have a nearly 100% internal light-to-heat conversion efficiency. , The distinctly better photothermal efficiency of MXenes than other 2D materials (CNTs, , graphene, MoS 2 , Te, , etc. ) makes them an ideal photothermal agent for the fabrication of superhydrophobic materials with multifunctionalities, for example, photothermal therapy, photothermal catalysis, photothermal desalination, and self-propelled machines …”

Dually reactive multilayer coatings enable orthogonal manipulation of underwater superoleophobicity and oil adhesion via post-functionalization

“…, nanowire arrays, micro-brushes, and micropillars). 24–28 While promising, these surfaces are commonly only able to switch between a ground and stimulated oil adhesion state and lack the ability to finely tune the CAH and the consequent oil droplet mobility. Recently, we have reported the design of multilayer coatings with a single type of reactive residual group ( e.g.…”

Wettability and Droplet Directional Spread Investigation of Crescent Array Surface Inspired by Slippery Zone of Nepenthes

“…The functional surfaces with elaborately arranged micro/nanostructures can achieve the precise control of liquid and then realize the fine transfer, [ 1,2 ] separation, [ 3 ] mixture, [ 4 ] or transport [ 5,6 ] of tiny substance. [ 7–9 ] A variety of artificial surfaces with various wettability inspired by natural creatures have been developed [ 10–12 ] and successfully applied in the fields of medical testing, [ 13 ] anti/collect‐fog, [ 14 ] self‐cleaning [ 15 ] and chip heat dissipation. [ 16 ]…”

“…The functional surfaces with elaborately arranged micro/nanostructures can achieve the precise control of liquid and then realize the fine transfer, [1,2] separation, [3] mixture, [4] or transport [5,6] of tiny substance. [7][8][9] A variety of artificial surfaces with various wettability inspired by natural creatures have been developed [10][11][12] and successfully applied in the fields of medical testing, [13] anti/collect-fog, [14] self-cleaning [15] and chip heat dissipation. [16] Among the various creatures with special wettability, Nepenthes has aroused widespread concerns due to its marvelous its low efficiency and high positioning accuracy requirement over a large area.…”