An Anodized Titanium/Sol-Gel Composite Coating with Self-Healable Superhydrophobic and Oleophobic Property

Li, Tinghua; Dong, Chongjian; Liu, Yupeng; Wu, Jun; Zhang, Xia; Gong, Xiaowei; Zhao, Wei; Wang, Daoai; Donglai, Zhu

doi:10.3389/fmats.2021.618674

Cited by 8 publications

(3 citation statements)

References 40 publications

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“…In natural conditions, titanium is covered by a native oxide film of some nanometers [68], which can be increased by electrochemical anodization at a rate of about 2-3 nm V −1 [69][70][71][72][73].…”

Section: Electrochemical Passivationmentioning

confidence: 99%

Passive Layers and Corrosion Resistance of Biomedical Ti-6Al-4V and β-Ti Alloys

et al. 2021

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The high specific strength, good corrosion resistance, and great biocompatibility make titanium and its alloys the ideal materials for biomedical metallic implants. Ti-6Al-4V alloy is the most employed in practical biomedical applications because of the excellent combination of strength, fracture toughness, and corrosion resistance. However, recent studies have demonstrated some limits in biocompatibility due to the presence of toxic Al and V. Consequently, scientific literature has reported novel biomedical β-Ti alloys containing biocompatible β-stabilizers (such as Mo, Ta, and Zr) studying the possibility to obtain similar performances to the Ti-6Al-4V alloys. The aim of this review is to highlight the corrosion resistance of the passive layers on biomedical Ti-6Al-4V and β-type Ti alloys in the human body environment by reviewing relevant literature research contributions. The discussion is focused on all those factors that influence the performance of the passive layer at the surface of the alloy subjected to electrochemical corrosion, among which the alloy composition, the method selected to grow the oxide coating, and the physicochemical conditions of the body fluid are the most significant.

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Section: Electrochemical Passivationmentioning

confidence: 99%

Passive Layers and Corrosion Resistance of Biomedical Ti-6Al-4V and β-Ti Alloys

et al. 2021

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“…The conventional self-healing superhydrophobic coatings could restore their superhydrophobicity via heating of the chemically damaged coatings in an oven. , However, this approach makes it impossible to repair damaged coatings in service. Some recently developed photothermal self-healing superhydrophobic surfaces could solve this issue by near-infrared light or ultraviolet light irradiation, , but are still hindered by a small self-healing area, too long of a self-healing time, and simulated light sources, etc.…”

Section: Resultsmentioning

confidence: 99%

Superhydrophobic Coatings with Photothermal Self-Healing Chemical Composition and Microstructure for Efficient Corrosion Protection of Magnesium Alloy

et al. 2021

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Self-healing superhydrophobic coatings have a wide potential for practical applications by prolonging their lifespan, but still suffer from some shortcomings, for example, difficulty in repairing microstructure damage, limited self-healing cycles, and more importantly the inability to self-heal while in service. Herein, we present the fabrication of superhydrophobic coatings having photothermal self-healing chemical composition and microstructure for the high performance anticorrosion of Mg alloy. The coatings contain a shape-memory polymer (SMP) primer and an upper superhydrophobic coating composed of fluorinated polysiloxane-modified multiwalled carbon nanotubes (PF-POS@MWCNTs). The coatings have good superhydrophobicity, photothermal effect, and anticorrosion performance. The coatings show excellent self-healing performance in response to chemical and microstructure damage, such as rapid self-healing under 1 sun irradiation in 10 min, complete self-healing after serious damage (e.g., 10 damage and self-healing cycles and complex microstructure damage), and even self-healing under natural sunlight in 4 h. Moreover, the self-healed coatings show good corrosion protection for magnesium alloy in the neutral salt spray test. These are because of the combination of the SMP primer with good shape-memory effect and the PF-POS@MWCNTs coating with good superhydrophobicity, photothermal effect, and embedded PF-POS. The coatings are self-healable under natural sunlight while in service and thus may find applications in diverse fields.

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“…The sol–gel technique has numerous advantages, including ease of manufacture and controllable compositions [ 85 ], eco-friendliness and low toxicity to human health. It is a convenient and versatile way to produce fine microstructures at low temperatures [ 84 ].…”

Section: Micro- and Nanofabrication Techniques To Create Superhydroph...mentioning

confidence: 99%

Advances in the Fabrication and Characterization of Superhydrophobic Surfaces Inspired by the Lotus Leaf

et al. 2022

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Nature has proven to be a valuable resource in inspiring the development of novel technologies. The field of biomimetics emerged centuries ago as scientists sought to understand the fundamental science behind the extraordinary properties of organisms in nature and applied the new science to mimic a desired property using various materials. Through evolution, living organisms have developed specialized surface coatings and chemistries with extraordinary properties such as the superhydrophobicity, which has been exploited to maintain structural integrity and for survival in harsh environments. The Lotus leaf is one of many examples which has inspired the fabrication of superhydrophobic surfaces. In this review, the fundamental science, supported by rigorous derivations from a thermodynamic perspective, is presented to explain the origin of superhydrophobicity. Based on theory, the interplay between surface morphology and chemistry is shown to influence surface wetting properties of materials. Various fabrication techniques to create superhydrophobic surfaces are also presented along with the corresponding advantages and/or disadvantages. Recent advances in the characterization techniques used to quantify the superhydrophobicity of surfaces is presented with respect to accuracy and sensitivity of the measurements. Challenges associated with the fabrication and characterization of superhydrophobic surfaces are also discussed.

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An Anodized Titanium/Sol-Gel Composite Coating with Self-Healable Superhydrophobic and Oleophobic Property

Cited by 8 publications

References 40 publications

Passive Layers and Corrosion Resistance of Biomedical Ti-6Al-4V and β-Ti Alloys

Passive Layers and Corrosion Resistance of Biomedical Ti-6Al-4V and β-Ti Alloys

Superhydrophobic Coatings with Photothermal Self-Healing Chemical Composition and Microstructure for Efficient Corrosion Protection of Magnesium Alloy

Advances in the Fabrication and Characterization of Superhydrophobic Surfaces Inspired by the Lotus Leaf

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