Design of Metal-Based Slippery Liquid-Infused Porous Surfaces (SLIPSs) with Effective Liquid Repellency Achieved with a Femtosecond Laser

Abstract

Slippery liquid-infused porous surfaces (SLIPSs) have become an effective method to provide materials with sliding performance and, thus, achieve liquid repellency, through the process of infusing lubricants into the microstructure of the surface. However, the construction of microstructures on high-strength metals is still a significant challenge. Herein, we used a femtosecond laser with a temporally shaped Bessel beam to process NiTi alloy, and created uniform porous structures with a microhole diameter of around 4 µm, in order to store and lock lubricant. In addition, as the lubricant is an important factor that can influence the sliding properties, five different lubricants were selected to prepare the SLIPSs, and were further compared in terms of their sliding behavior. The temperature cycle test and the hydraulic pressure test were implemented to characterize the durability of the samples, and different liquids were used to investigate the possible failure under complex fluid conditions. In general, the prepared SLIPSs exhibited superior liquid repellency. We believe that, in combination with a femtosecond laser, slippery liquid-infused porous surfaces are promising for applications in a wide range of areas.

Visible light-induced surface grafting polymerization of perfluoropolyether brushes as marine low fouling materials

“…Furthermore, a decrease in SV was reported with increasing viscosity of the oils. Several other studies 19,20 reported the increase in SA and decrease in SV with increasing silicone oil viscosity.…”

Biology and nature: Bionic superhydrophobic surface and principle

“…), femtosecond laser technology has the advantages of high precision, good controllability and applicability to different materials. Therefore, intelligent bionic design with the help of advanced manufacturing technologies and tools such as femtosecond laser machining is also a focus of future research ( Yong et al, 2015 ; Zhang et al, 2020 ; Fang et al, 2022 ; Yong et al, 2022 ; Zhang et al, 2022 ). 5) The structural and functional design can be coherent and consistent, and the functional design can be considered in conjunction with the natural optical properties of the creature, thus imparting a more aesthetic character.…”

“…), femtosecond laser technology has the advantages of high precision, good controllability and applicability to different materials. Therefore, intelligent bionic design with the help of advanced manufacturing technologies and tools such as femtosecond laser machining is also a focus of future research ( Yong et al, 2015 ; Zhang et al, 2020 ; Fang et al, 2022 ; Yong et al, 2022 ; Zhang et al, 2022 ).…”

Durability of Slippery Liquid-Infused Surfaces: Challenges and Advances

“…Roughness can be generated by either adding a textured layer (bottom-top) or removing a portion of the surface (top-bottom) [69,[90][91][92][93]. Subtractive methods include photolithography, soft lithography, laser ablation and etching techniques [43,47,[94][95][96][97][98][99][100]. Additive techniques include methods such as deposition (chemical vapor deposition, electrochemical deposition, liquid-phase deposition techniques), sol-gel methods, self-assembly and layerby-layer assembly [101][102][103][104][105][106][107].…”