Excellent Mechanical Abrasion Resistance Research Articles

Facile fabrication of superhydrophobic copper hydroxide coated mesh for effective separation of water-in-oil emulsions

Recently, the super-wetting materials for separating oil/water emulsions have attracted great attention. Developing a low-cost and high-efficient filter material that is challenging to separate stable oil/water emulsions efficiently. In this work, the superhydrophobic copper hydroxide coated mesh was successfully fabricated through a facile spraying and surface modification approach. The excellent separation property of the as-prepared material with efficiency greater than 99.0% under the driving of gravity. Furthermore, the as-developed SCM retained the favorable recyclability and excellent stability even after 10 reuses. More importantly, the SCM exhibited excellent mechanical abrasion resistance after 50 abrasion cycles with sandpaper, which could still remove water from emulsions and possessed excellent separation efficiency. Therefore, the newly developed materials with special wettability have excellent potential in practical use and provide a novel perspective for preparation of stable emulsions separation materials.

Feasible fabrication of a wear-resistant hydrophobic surface

In this study, a novel facile method, namely liquid-phase laser ablation, was proposed to obtain a robust hydrophobic surface. The cemented carbide sample was immersed in a fluorosilane solution and ablated by laser, while controlling the distance between the top surface of sample and liquid level. Then, a surface with good hydrophobicity could be obtained by one step using this technique. The effect of different laser processing parameters on the wettability of the sample surface was studied, and the water contact-angle (WCA) and the rolling angle (RA) could reach 148.4° ± 0.6°, 4.5° ± 0.5°, respectively, which indicated excellent hydrophobicity. Moreover, we found that the hydrophobic surface fabricated by the new method was more wear-resistant than that obtained by the laser texture and fluorination treatment. The hydrophobic surface exhibited excellent mechanical abrasion resistance as it maintained hydrophobicity even after being subjected to mechanical abrasion by hand-polishing 600 times with 1200 grit metallographic sandpaper. Moreover, the mechanism of wear-resistant was analyzed, which was attributed to the formation of the self-healing hydrophobic coatings with a certain thickness on the microstructures. This facile and low-cost method can not only be easily extended to other materials but also produce hydrophobic surfaces with robustness and self-healing properties.

Fabrication of Cu–CuO–Fe2O3/Fe anti-sticky and superhydrophobic surfaces on an iron substrate with mechanical abrasion resistance and corrosion resistance

Superhydrophobic Cu–CuO–Fe2O3/Fe surfaces with excellent mechanical abrasion resistance and anti-corrosion property were fabricated via immersion and annealing.

Facile preparation of superamphiphobic phosphate–Cu coating on iron substrate with mechanical stability, anti-frosting properties, and corrosion resistance

We present a facile, low-cost, and fast method for preparing superamphiphobic surface with water contact angle and rapeseed oil contact angle of 160° and 153° on steel substrate. The fabrication process is composed of the phosphate, Cu co-deposition in phosphating bath and the low surface energy materials modification by 1H,1H,2H,2H-peruorodecyltriisopropoxysilane (FAS-17). Contact angle measurement, X-ray diffraction, scanning electron microscopy equipped with energy-dispersive spectrometry, X-ray photoelectron spectroscopy, and electrochemical workstation were carried out to investigate the surface wettability, chemical composition, morphology, and anti-corrosion performance. Results show that the optimal CuSO4·5H2O concentration for the surface to achieve superamphiphobicity is 6 g L−1, and the prepared surface exhibits excellent mechanical abrasion resistance on 600 grit SiC sand paper. Moreover, the dynamic frosting–defrosting experiments indicated that the surface has a good anti-frosting ability. The potentiodynamic polarization proves that the superhydrophobic surface can protect the steel substrate from corrosion solution. Meanwhile the surface also shows a good chemical stability under different pH values and excellent self-cleaning ability in both muddy water and lubricating oil.

Facile Fabrication of Superhydrophobic Surface with Excellent Mechanical Abrasion and Corrosion Resistance on Copper Substrate by a Novel Method

A novel method for controllable fabrication of a superhydrophobic surface with a water contact angle of 162 ± 1° and a sliding angle of 3 ± 0.5° on copper substrate is reported in this Research Article. The facile and low-cost fabrication process is composed from the electrodeposition in traditional Watts bath and the heat-treatment in the presence of (heptadecafluoro-1,1,2,2-tetradecyl) triethoxysilane (AC-FAS). The superhydrophobicity of the fabricated surface results from its pine-cone-like hierarchical micro-nanostructure and the assembly of low-surface-energy fluorinated components on it. The superhydrophobic surface exhibits high microhardness and excellent mechanical abrasion resistance because it maintains superhydrophobicity after mechanical abrasion against 800 grit SiC sandpaper for 1.0 m at the applied pressure of 4.80 kPa. Moreover, the superhydrophobic surface has good chemical stability in both acidic and alkaline environments. The potentiodynamic polarization and electrochemical impedance spectroscopy test shows that the as-prepared superhydrophobic surface has excellent corrosion resistance that can provide effective protection for the bare Cu substrate. In addition, the as-prepared superhydrophobic surface has self-cleaning ability. It is believed that the facile and low-cost method offer an effective strategy and promising industrial applications for fabricating superhydrophobic surfaces on various metallic materials.

Fabrication of a superhydrophobic graphene surface with excellent mechanical abrasion and corrosion resistance on an aluminum alloy substrate

A superhydrophobic graphene film with excellent mechanical abrasion resistance and corrosion resistance was successfully deposited on Al alloy using a spin-coating method.