A robust and anticorrosion non-fluorinated superhydrophobic aluminium surface for microplastic removal

Rius-Ayra, Oriol; Llorca-Isern, Núria

doi:10.1016/j.scitotenv.2020.144090

Cited by 39 publications

(18 citation statements)

References 59 publications

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“…Herein, we show that superhydrophobic coatings can also be used in an innovative way to address the increasingly significant issue of pollution caused by MPs [53]. The coating obtained in this study confirmed that the wetting properties of superhydrophobic surfaces combined with the properties of MPs can be used to remove these pollutants [54].…”

Section: Microplasticssupporting

confidence: 70%

Durable Superhydrophobic Coating for Efficient Microplastic Removal

2021

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The pollution caused by microplastics around the world is an increasingly significant issue that has to be tackled with different methods and technologies. Here, we report a straightforward and rapid process combining electrodeposition and electrophoresis to produce a durable superhydrophobic coating on an aluminum substrate (UNS A91070) that has a static contact angle (153°), sliding angle (1°), and contact angle hysteresis (1°). Field emission scanning electron microscopy and high-resolution transmission electron microscopy showed the presence of a hierarchical structure with nanolayers that were 70 nm thick. The chemical composition was also analyzed using attenuated total reflectance-Fourier transform infrared spectroscopy and high-resolution X-ray photoelectron spectroscopy, which revealed that the hierarchical structure was composed of zinc laurate (Zn(C11H20COO)2) that decreased the surface free energy of the system. Moreover, the coating showed high durability against abrasion caused by the P1200 SiC paper due to the presence of TiO2 particles in the upper layers as well as the homogeneous chemical composition of the hierarchical structure. Finally, taking advantage of the superoleophilic properties of superhydrophobic surfaces, the ability of the coating to remove high-density polyethylene microplastics from water was studied.

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Section: Microplasticssupporting

confidence: 70%

Durable Superhydrophobic Coating for Efficient Microplastic Removal

2021

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“…The C 1s peaks of 284.1, 284.8, and 288.3 eV are assigned to the inorganic carbon, C–C/C–H, and O–CO, , respectively, confirming the existence of lauric acid on the aluminum alloy surface. In Figure S2(b), the Al 2p peaks of three surfaces can be attributed to three peaks and assigned to Al metal, alumina, and Al–O from hydroxyl, but the peaks of alumina and Al–O on S-1.25 shift about 0.6 eV in the larger binding energy direction, confirming the change in the chemical environment of aluminum. − At the same time, the intensity of Al metal peaks on S-2.5 and S-5 are lower than that on S-1.25. Combined with the characteristic that XPS can record only elements with a thickness of a few nanometers, we can analyze that the excessive accumulation of lauric acid on the surface caused the changes in binding energy and intensity.…”

Section: Resultsmentioning

confidence: 90%

Convenient and large-scale fabrication of cost-effective superhydrophobic aluminum alloy surface with excellent reparability

Cui

Cao

et al. 2021

Langmuir

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Superhydrophobic surfaces are widely used in industry and daily life, yet their practical application is limited by their complicated preparation process, high cost, and poor repairability. We propose a low-cost, facile process for preparing superhydrophobic surfaces to address this limitation. Through a simple three-step spraying process, the rough structure was first constructed on the aluminum alloy, and upon modification by modifier, the superhydrophobic aluminum alloy surface was successfully prepared. The effect of the process parameters on wettability was experimentally studied. The results showed that this method can obtain superhydrophobic surfaces with a contact angle of 156.2°and contact angle hysteresis of 7.4°by simply adjusting the etching time and modifier concentration. In addition, it was found that the prepared surface can keep the superhydrophobic property unchanged at 180 °C, showing good thermal stability. When immersed in acetic acid and sodium hydroxide solution, the prepared surface can maintain its superhydrophobicity for about 2 days, showing good chemical stability. Besides, the surface has excellent repairability and can compensate for the short-life defects caused by poor friction resistance. This superhydrophobic surface with a simple preparation process, low cost, and excellent repairable characteristics also has excellent selfcleaning, antifogging, and antifrosting applications.

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“…This method is widely utilized and many new papers are added every day in the literature. In a recent one, anodization and liquid-phase deposition with lauric acid are combined to achieve superhydrophobicity and simultaneous superoleophilicity on Al exhibiting anticorrosion properties, while it was also reported that such surfaces if used underwater could remove microplastic particles [62].…”

Section: Combination Of Wet Etching and Synthesis Methodsmentioning

confidence: 99%

A Review of Fabrication Methods, Properties and Applications of Superhydrophobic Metals

et al. 2021

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Hydrophobicity and superhydrophobicity with self-cleaning properties are well-known characteristics of several natural surfaces, such as the leaves of the sacred lotus plant (Nelumbo nucifera). To achieve a superhydrophobic state, micro- and nanometer scale topography should be realized on a low surface energy material, or a low surface energy coating should be deposited on top of the micro-nano topography if the material is inherently hydrophilic. Tailoring the surface chemistry and topography to control the wetting properties between extreme wetting states enables a palette of functionalities, such as self-cleaning, antifogging, anti-biofouling etc. A variety of surface topographies have been realized in polymers, ceramics, and metals. Metallic surfaces are particularly important in several engineering applications (e.g., naval, aircrafts, buildings, automobile) and their transformation to superhydrophobic can provide additional functionalities, such as corrosion protection, drag reduction, and anti-icing properties. This review paper focuses on the recent advances on superhydrophobic metals and alloys which can be applicable in real life applications and aims to provide an overview of the most promising methods to achieve sustainable superhydrophobicity.

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A robust and anticorrosion non-fluorinated superhydrophobic aluminium surface for microplastic removal

Cited by 39 publications

References 59 publications

Durable Superhydrophobic Coating for Efficient Microplastic Removal

Durable Superhydrophobic Coating for Efficient Microplastic Removal

Convenient and large-scale fabrication of cost-effective superhydrophobic aluminum alloy surface with excellent reparability

A Review of Fabrication Methods, Properties and Applications of Superhydrophobic Metals

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