Ionic liquids-infused slippery surfaces for condensation and hot water repellency

ACS Appl. Mater. Interfaces

et al. 2018

Deep eutectic solvents (DESs) are, at room temperature, about dozens to hundreds of times more viscous than water, which brings pretty thick residues on solid surfaces, for example, causing drag-out and weight loss in the transfer process. Unfortunately, until now little work had been done for solving this knotty problem. In this study, the super antiwetting surface, i.e., super-DES-phobic surface (defined as DES contact angle > 150°) is proposed and fabricated successfully by a facile coating technique. Hierarchical silver dendrites on copper foam substrate provide effective dual-roughness surfaces showing stable superDESphobicity. The superDESphobic surface can repel the DESs and their derived solutions even under elevated temperature of about 120 °C and the impact attack of drops. It is also found that the superDESphobic surface can significantly delay the DESs freezing and reduce the adhesion strength of the frozen DESs. Interestingly, the superDESphobic surface can be applied as an effective tool for gauging the density of DES using an ∼2 μL droplet in virtue of its super antiwetting property. The super antiwetting surfaces show promise for potential applications in DES self-cleaning and antifreezing.

Section: Results and Discussionmentioning

confidence: 99%

Super Antiwetting Surfaces for Mitigating Drag-Out of Deep Eutectic Solvents

Wang

ACS Appl. Mater. Interfaces

et al. 2018

“…In fact, SLIPS develop rapidly in corrosion protection applications. 24,25 Guo et al obtained superior anticorrosion and anti-icing properties by fabricating SLIPSs using the spincoating method. 26 Zhang et al proposed a facile method with inexpensive polyols as lubricant liquids for obtaining a novel SLIPS; the as-prepared samples also exhibit an outstanding anticorrosion performance.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Applying SLIPSs to corrosion protection will greatly extend the service life of the underlying metal because the SLIPS does not depend on an air layer, and its other advantages, such as its ability to withstand extreme temperature and pressure, will expand the application environment range of the metal substrate. In fact, SLIPS develop rapidly in corrosion protection applications. , Guo et al obtained superior anticorrosion and anti-icing properties by fabricating SLIPSs using the spin-coating method . Zhang et al proposed a facile method with inexpensive polyols as lubricant liquids for obtaining a novel SLIPS; the as-prepared samples also exhibit an outstanding anticorrosion performance .…”

Section: Introductionmentioning

confidence: 99%

Effect of Morphology Evolution on the Anticorrosion Performance of Superhydrophobic Surfaces and Lubricant-Infused Surfaces

ACS Sustainable Chem. Eng.

Sun

Guo

et al. 2020

The properties of three kinds of superhydrophobic surfaces (SHSs) and three kinds of superslippery liquid-infused surfaces (SLIPSs) composed of microspheres with different morphologies (solid spheres, bayberry-like hollow spheres, and urchin-like hollow spheres) were studied in this paper. The results show that, in all the superhydrophobic surface samples, the superhydrophobic surfaces with a multilayer structure have outstanding advantages in all aspects of performance over that with a single structure. It is likely due to the multistage structure combining the pressure dissipation of the microstructure and the high capillary pressure of the nanostructure, further reducing the contact angle hysteresis and improving the pressure resistance resulting in an improvement in the surface properties. We also show that SLIPSs with the urchin-like microspheres (U-SLIIPS) provide a superior performance relative to the other two kinds of SLIPSs. The unique inner hollow part of the urchin-like structure provides a good environment for storing lubricating fluids. The spherical outer shell with nanotubes can facilitate better capillary output and minimize lubricant loss. The U-SLIPS has the best shear resistance, lowest contact angle hysteresis, and best corrosion resistance and other properties among all the samples.

“…[27] Wang et al using ionic liquids (ILs) -infused surfaces to facilitate an easier condensation process. [28] Dong et al fabricated SLIPS using 3D direct laser writing where the novel interface offered an improved method for anti-icing. [29] If these versatile SLIPS were constructed on an Al alloy, we deduce that SLIPS could protect the alloy substrate from corrosion and icing, thus enabling the aluminum alloy to be adopted more widely in the marine environment.…”

Section: Introductionmentioning

confidence: 99%

Long‐Term Stability of a Liquid‐Infused Coating with Anti‐Corrosion and Anti‐Icing Potentials on Al Alloy

Chen

et al. 2019

ChemElectroChem

Corrosion and surface icing severely shorten the service life of aluminum and its alloys. Herein, we synthesized wrinkled and porous, hollow, tubular SiO2 on an Al alloy, followed by fluorination with (Heptadecafluoro‐1,1,2,2‐tetradecyl) trimethoxysilane (FAS) and then infusing Krytox 100 for obtaining novel slippery liquid‐infused porous surfaces (SLIPSs). The unique structure greatly reduced the loss of lubricant due to the volatilization or subcooled condensation and thus effectively extended the life of the SLIPS. The corrosion resistance of as‐prepared SLIPS was five orders of magnitude higher than that of the bare Al alloy and did not change significantly after immersion in an NaCl solution for 93 days. The ice‐adhesion strength remained at approximately 18 kPa for the whole duration of the icing/deicing cycles. The samples exhibited a low contact angle hysteresis and superior self‐cleaning properties. In addition, we also revealed the differences in self‐cleaning and anti‐icing macroscopic phenomena of superhydrophobic surfaces (SHS) and SLIPS.