Femtosecond and picosecond laser fabrication for long-term superhydrophilic metal surfaces

Rajan, Rahul A.; Ngo, Chi-Vinh; Yang, Jin; Liu, Yu; Konda, Srinivasa Rao; Chen, Guo

doi:10.1016/j.optlastec.2021.107241

Cited by 27 publications

(10 citation statements)

References 71 publications

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“…To investigate the physical function of the laser-processed CFRP, we also investigated surface wettability. Unique wetting phenomena, such as excellent hydrophobicity and hydrophilicity, can be exhibited by superwettable textured surfaces and have enabled a wide variety of applications in the fields of bionics, biosensing, surface performance improvement, and so on. − Ultrafast laser processing has great potential in regulating the surface wettability of various materials and achieved significant applications. − ,− The surface wettability of CFRP processed by a femtosecond laser with different laser pulse energies and scanning speeds is shown in Figure . The nontreated CFRP was hydrophobic, and its initial contact angle of water droplet was 105.6°, which was attributed to the good hydrophobicity of smooth epoxy resin on the surface of nontreated CFRP. − Figure a shows the dependence of the droplet contact angle of the laser-processed CFRP on laser scanning speed.…”

Section: Resultsmentioning

confidence: 99%

Controllable Fabrication of Hydrophilic Surface Micro/Nanostructures of CFRP by Femtosecond Laser

Zuo,

Liu,

et al. 2024

ACS Omega

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Carbon fiber reinforced polymer (CFRP), a highly engineered lightweight material with superior properties, is widely used in industrial fields, such as aerospace, automobile, and railway transportation, as well as medical implants and supercapacitor. This work presents an effective surface treatment method for the controllable fabrication of hydrophilic surface micro/nanostructures of CFRP through femtosecond laser processing. Selective removal of the epoxy resin and leaving the carbon fibers exposed are achieved when CFRP is weakly ablated by a femtosecond laser. The diameters and structures of the carbon fibers can be controlled by adjusting the laser processing parameters. Three-dimensional surface micro/nanostructures are processed when CFRP is strongly ablated by a femtosecond laser. Meanwhile, the transformation of the sp 2 orbitals to sp 3 orbitals of graphitic carbons of carbon fibers is induced by a femtosecond laser. Moreover, the investigation of surface roughness and wettability of femtosecond laser-processed CFRP indicates increased roughness and excellent hydrophilicity (a contact angle of 28.1°). This work reveals the effect of femtosecond laser processing on the regulation of the physicochemical properties of CFRP, which can be applicable to surface treatment and performance control of other fiber-resin composites. The excellent hydrophilicity will be conducive to the combination of CFRP with other materials or to reducing the friction resistance of CFRP used in medical implants.

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Section: Resultsmentioning

confidence: 99%

Controllable Fabrication of Hydrophilic Surface Micro/Nanostructures of CFRP by Femtosecond Laser

Zuo,

Liu,

et al. 2024

ACS Omega

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“…The DLW samples preserved their superhydrophilic property during the 55 days without significant variations, presenting final SWCA values between 2.5°± 1.8°and 7.0°± 4.0°. Several studies have reported the fabrication of superhydrophilic laser-treated aluminum surfaces using thermal [45,51,52] or chemical [21,53] treatments. Only a limited number of studies have reported the generation of superhydrophilic laser-structured aluminum surfaces without additional treatments.…”

Section: Wetting Propertiesmentioning

confidence: 99%

On the Corrosion Properties of Aluminum 2024 Laser‐Textured Surfaces with Superhydrophilic and Superhydrophobic Wettability States

Zschach,

Baumann,

Soldera

et al. 2023

Adv Materials Inter

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In this work, the mechanism of the corrosion behavior of laser‐treated aluminum is studied. Two different laser techniques are used to fabricate the samples, direct laser interference patterning (DLIP) and direct laser writing (DLW), using nanosecond laser sources. The DLIP treatment uses a two‐beam optical configuration producing line‐like periodic structures. The DLW technique is employed to produce non‐periodic structures on the Al‐surface with the same cumulated fluences as in DLIP. The surface topography is analyzed by confocal microscopy, and the formation of oxide layers is investigated by scanning electron microscopy of cross‐sections produced using a focused ion beam. Wetting measurements performed on the laser‐treated samples exhibit a contrasting behavior, leading to either superhydrophobic or superhydrophilic states. In the case of the DLIP treatment, the static water contact angle is increased from 81° up to 158°, while for DLW, it decreases to 3°. Electrochemical tests demonstrate a decreased corrosion rate after laser treatment. Additionally, findings indicate no correlation between wettability and corrosion reduction. Therefore, the improvement in corrosion resistance is mainly attributed to the oxide layer formed by laser treatment. Although similar corrosion rates are achieved for both treatments, surfaces produced with DLIP can be beneficial when additional surface properties are required.

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“…A coating with a contact angle value greater than 150 • in water is a superhydrophobic surface, and presents not only deicing ability, but also stimulichromism, antibacterial activity, flame retardant, and lubricating properties. Coatings with contact angle values less than 90 • are hydrophilic, and when the values are under 10 • , the surface is superhydrophilic [169][170][171]. A large number of coating components can increase or decrease the contact angle, leading to a biomimetic structure that is able to induce special properties and multifunctionality.…”

Section: Nanofabrication Aspects Of Green Procedures In Enhancing Coatings Multifunctionality (Green Corrosion Inhibitors Biomimetic Coatmentioning

confidence: 99%

Sustainable Coatings on Metallic Alloys as a Nowadays Challenge

2021

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Starting with a description of the meaning of sustainable coating nowadays, this review presents a selection of methods for sustainable coatings manufacture using raw materials, saving energy and costs. This selection creates an introduction for the coatings performances of intensively investigated coated alloys and their multifunctionality. There are many examples and EU recommendations to be discussed, and we especially chose to introduce sustainable coatings with both industrial and medical functions, such as bioinspired films and coatings on high-entropy alloys, biodegradable metallic alloys, etc. A special focus is on nanotechnology and nanomaterials in green procedures, enhancing coatings’ multifunctionality, introducing green corrosion inhibitors, smart additives, and coatings based on superhydrophobicity. The conclusions and future perspectives of sustainable and multifunctional coatings, as expressions of sustainable advanced materials, are based on important motivations of such studies.

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Femtosecond and picosecond laser fabrication for long-term superhydrophilic metal surfaces

Cited by 27 publications

References 71 publications

Controllable Fabrication of Hydrophilic Surface Micro/Nanostructures of CFRP by Femtosecond Laser

Controllable Fabrication of Hydrophilic Surface Micro/Nanostructures of CFRP by Femtosecond Laser

On the Corrosion Properties of Aluminum 2024 Laser‐Textured Surfaces with Superhydrophilic and Superhydrophobic Wettability States

Sustainable Coatings on Metallic Alloys as a Nowadays Challenge

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