Durable Superhydrophobic Coating for Efficient Microplastic Removal

Rius-Ayra, Oriol; Biserova-Tahchieva, Alisiya; Llorca-Isern, Núria

doi:10.3390/coatings11101258

Cited by 10 publications

(4 citation statements)

References 54 publications

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“…Figure 2 presents different engineered adsorbents that are commonly in use for the adsorption of MPs from aqueous media [53]. It has been shown that removal efficiency of these adsorbents is between 25% for biochar [60] to ~ 100% for zinc laurate-TiO 2 particle coating [61]. It should be noted that the adsorption capacity of adsorbents is highly affected by the shape and size of MPs.…”

Section: Removal Methods Of Mps From Aqueous Environmentmentioning

confidence: 99%

Microplastics removal from aqueous environment by metal organic frameworks

Honarmandrad,

Kaykhaii,

Gębicki

2023

BMC Chemistry

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This paper provides an overview of recent research performed on the applications of metal–organic frameworks (MOFs) for microplastics (MPs) removal from aqueous environments. MPs pollution has become a major environmental concern due to its negative impacts on aquatic ecosystems and human health. Therefore, developing effective and sustainable methods for removing them from aqueous environments is crucial. In recent years, MOFs have emerged as a promising solution for this purpose due to their unique properties such as high surface area, renewability, chemical stability, and versatility. Moreover, their specific properties such as their pore size and chemical composition can be tailored to enhance their efficiency in removing MPs. It has been shown that MOFs can effectively adsorb MPs from aqueous media in the range of 70–99.9%. Besides some high price concerns, the main drawback of using MOFs is their powder form which can pose challenges due to their instability. This can be addressed by supporting MOFs on other substrates such as aerogels or foams. Meanwhile, there is a need for more research to investigate the long-term stability of MOFs in aqueous environments and developing efficient regeneration methods for their repeated use.

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Section: Removal Methods Of Mps From Aqueous Environmentmentioning

confidence: 99%

Microplastics removal from aqueous environment by metal organic frameworks

Honarmandrad,

Kaykhaii,

Gębicki

2023

BMC Chemistry

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“… 35 − 37 Recently, the ability of superhydrophobic materials to remove microplastics is attracting attention. A few articles show these innovative applications, 38 − 40 but the removal mechanism has to be exhaustively discussed considering the wetting properties from a chemical and physical point of view.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, these surfaces can be used to separate oil from water mixtures as well as oil-in-water emulsions with extremely low oil contact angles (OCAs) close to 0°. − Recently, the ability of superhydrophobic materials to remove microplastics is attracting attention. A few articles show these innovative applications, − but the removal mechanism has to be exhaustively discussed considering the wetting properties from a chemical and physical point of view.…”

Section: Introductionmentioning

confidence: 99%

Superhydrophobic 304 Stainless Steel Mesh for the Removal of High-Density Polyethylene Microplastics

et al. 2022

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Microplastics are a global issue that affects the environment, economy, as well as human health. Herein, we present a superhydrophobic 304 stainless steel mesh obtained by chemical etching followed by a liquid-phase deposition of lauric acid that can be used for microplastic removal. Field emission scanning electron microscopy (FE-SEM) and high-resolution X-ray photoelectron spectroscopy (HR-XPS), among other techniques, were used to identify the hierarchical structure and chemical composition of the surface. They revealed that iron laurate decreased the surface free energy. The 304 stainless steel mesh was superhydrophobic (169°) and superoleophilic (0°). Taking advantage of these wetting properties, we showed an innovative use of these superhydrophobic surfaces in the removal of microplastics. Additionally, we analyzed the removal efficiency from a surface and colloidal point of view that allowed us to explain and clarify why microplastics can also be removed by their wetting properties. The loss of a double electrostatic cloud between the microplastics and the predominance of van der Waals interactions in the organic phase promote the removal of these persistent pollutants from water.

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“…Inspired by natural lotus leaf, superhydrophobic surfaces show excellent water repellency with low wettability. Superhydrophobic surfaces are surfaces with a water contact angle of more than 150 • and a water sliding angle of less than 10 • , which are always constructed by combining appropriate micro/nano hierarchical structure with low surface energy materials [11][12][13][14]. Rough surface microstructure can be prepared by various methods, such as anodic oxidation, template, hydrothermal treatment, and sol-gel methods [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

D-Cysteine Functionalized Superhydrophobic Nanocomposite Coating with Multiple-Action Antibacterial Property and Enhanced Mechanical Durability

et al. 2022

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In this study, a durable superhydrophobic antibacterial coating was developed by a facile spraying method. A mixture of bisphenol A diglycidyl ether (BADGE) and hydrophobic SiO2 nanoparticles was sprayed on carbon steel to provide a superhydrophobic substrate. D-cysteine (D-cys) functionalized SiO2/dopamine/silver nanoparticles with multilayer core-shell structure were then sprayed on superhydrophobic substrate to enhance antibacterial performance. The results of morphology observation and X-ray photoelectron spectroscopy (XPS) indicated the successful preparation of antibacterial nanoparticles and presented the hierarchical micro/nanostructures of coating surface. The as-prepared coating exhibited superhydrophobicity, with the water contact angle of ~153°. The coating was endowed with good mechanical durability, which maintained the water contact angle of ~150° after 180 cycles in tape-peel tests. The results of electrochemical impedance spectroscopy showed satisfactory corrosion resistance of this coating during 3 days of immersion in 3.5% NaCl solution. Furthermore, the coating showed excellent antibacterial performances against Escherichia coli and Pseudomonas aeruginosa, which benefited from the synergistic actions of low wettability of superhydrophobic surface, bactericidal behavior of Ag nanoparticles, and biofilm inhibition effect of D-cys.

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Durable Superhydrophobic Coating for Efficient Microplastic Removal

Cited by 10 publications

References 54 publications

Microplastics removal from aqueous environment by metal organic frameworks

Microplastics removal from aqueous environment by metal organic frameworks

Superhydrophobic 304 Stainless Steel Mesh for the Removal of High-Density Polyethylene Microplastics

D-Cysteine Functionalized Superhydrophobic Nanocomposite Coating with Multiple-Action Antibacterial Property and Enhanced Mechanical Durability

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