Fabrication of super hydrophilic surface on alumina ceramic by ultrafast laser microprocessing

Cao, Qianhui; Wang, Zhengsen; He, Wenting

doi:10.1016/j.apsusc.2021.149842

Cited by 36 publications

(9 citation statements)

References 22 publications

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“…The percentages of nonpolar C–C/C–H group on the laser-ablated surface before and after annealing were 74.4 and 78.4%, respectively. In contrast, both C–O and CO are polar groups, − which are beneficial to surface hydrophilicity. The sums of the percentages of polar C–O and CO groups on the laser-ablated surface before and after annealing were 25.6 and 21.6%, respectively.…”

Section: Resultsmentioning

confidence: 99%

Achieving Superhydrophobicity of Zr-Based Metallic Glass Surfaces with Tunable Adhesion by Nanosecond Laser Ablation and Annealing

Cui

Huang

Wang

et al. 2022

ACS Appl. Mater. Interfaces

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Tuning the surface wettability and adhesion of metallic glasses (MGs) is a promising approach to enrich their engineering applications. In this study, using nanosecond laser ablation in air, hierarchical micro/nanostructures were directly fabricated on a Zr-based MG surface. Following subsequent annealing, the surface exhibited superhydrophobicity (maximum contact angle: 166°, minimum sliding angle: 2°). Furthermore, the superhydrophobic surface could be tuned from low to high surface adhesion force by controlling the laser-ablated spot interval. By analyzing the laser-ablated structures and surface chemical compositions, the superhydrophobicity was related to the formation of hierarchical micro/nanostructures and the absorption of organic compounds with low surface free energy in air, and the change in surface adhesion force was attributed to the difference in surface roughness. The experimental results showed that the superhydrophobic surface with low adhesion force could be used in self-cleaning applications, while the superhydrophobic surfaces with different adhesion forces could be used in no-loss liquid transportation. This study provides an efficient and low-cost way to fabricate superhydrophobic MG surfaces with tunable adhesion, which will broaden the functional applications of MGs.

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Section: Resultsmentioning

confidence: 99%

Achieving Superhydrophobicity of Zr-Based Metallic Glass Surfaces with Tunable Adhesion by Nanosecond Laser Ablation and Annealing

Cui

Huang

Wang

et al. 2022

ACS Appl. Mater. Interfaces

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“…At the initial growth stage, HMTA tardily decomposed to liberate OH − ions. The generated OH − ions form insoluble ZnO precipitated at supersaturated Zn(OH) 4 2− ions or Zn 2+ ions. As a polar crystal, ZnO (0001) exhibited a positive charge on the crystalline surface and attracted OH − ions and Zn(OH) 4 2− ions in the solution.…”

Section: Surface Morphology and Chemical Composition Of Zno Coated Me...mentioning

confidence: 99%

“…The generated OH − ions form insoluble ZnO precipitated at supersaturated Zn(OH) 4 2− ions or Zn 2+ ions. As a polar crystal, ZnO (0001) exhibited a positive charge on the crystalline surface and attracted OH − ions and Zn(OH) 4 2− ions in the solution. As a result, ZnO had the highest growth rate along the C-axis compared to other crystal planes and eventually forms ZnO nanostructures [37][38][39][40].…”

Section: Surface Morphology and Chemical Composition Of Zno Coated Me...mentioning

confidence: 99%

“…Surface wettability is an important material property, and it is determined by surface structure and surface chemical composition [ 1 , 2 ]. Based on existing theoretical methods, a special material wettability can be achieved by modification of surface texture and surface chemical composition [ 3 , 4 ]. During the last decades, there has been increasing interest in the materials with unique functions due to their promising application in various fields such as self-cleaning, antimicrobial, anti-icing, biocompatible materials, or oil transportation [ 4 , 5 , 6 , 7 , 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

“…Based on existing theoretical methods, a special material wettability can be achieved by modification of surface texture and surface chemical composition [ 3 , 4 ]. During the last decades, there has been increasing interest in the materials with unique functions due to their promising application in various fields such as self-cleaning, antimicrobial, anti-icing, biocompatible materials, or oil transportation [ 4 , 5 , 6 , 7 , 8 , 9 ]. Particularly, depending on the different interfacial energy between organic compounds and water in immiscible oil–water mixtures, the materials with special wettability have gained widespread attention in oil–water separation [ 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

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Wettability Improvement in Oil–Water Separation by Nano-Pillar ZnO Texturing

et al. 2022

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The nanostructure-based surface texturing can be used to improve the materials wettability. Regarding oil–water separation, designing a surface with special wettability is as an important approach to improve the separation efficiency. Herein, a ZnO nanostructure was prepared by a two-step process for sol–gel process and crystal growth from the liquid phase to achieve both a superhydrophobicity in oil and a superoleophobic property in water. It is found that the filter material with nanostructures presented an excellent wettability. ZnO-coated stainless-steel metal fiber felt had a static underwater oil contact angle of 151.4° ± 0.8° and an underoil water contact angle of 152.7° ± 0.6°. Furthermore, to achieve water/oil separation, the emulsified impurities in both water-in-oil and oil-in-water emulsion were effectively intercepted. Our filter materials with a small pore (~5 μm diameter) could separate diverse water-in-oil and oil-in-water emulsions with a high efficiency (>98%). Finally, the efficacy of filtering quantity on separation performance was also investigated. Our preliminary results showed that the filtration flux decreased with the collection of emulsified impurities. However, the filtration flux could restore after cleaning and drying, suggesting the recyclable nature of our method. Our nanostructured filter material is a promising candidate for both water-in-oil and oil-in-water separation in industry.

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Research progress of surface modification and solid–liquid lubrication synergistic friction reduction and wear resistance

Chen

Yang

et al. 2022

Int J Adv Manuf Technol

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Fabrication of super hydrophilic surface on alumina ceramic by ultrafast laser microprocessing

Cited by 36 publications

References 22 publications

Achieving Superhydrophobicity of Zr-Based Metallic Glass Surfaces with Tunable Adhesion by Nanosecond Laser Ablation and Annealing

Achieving Superhydrophobicity of Zr-Based Metallic Glass Surfaces with Tunable Adhesion by Nanosecond Laser Ablation and Annealing

Wettability Improvement in Oil–Water Separation by Nano-Pillar ZnO Texturing

Research progress of surface modification and solid–liquid lubrication synergistic friction reduction and wear resistance

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