A Robust Cu(OH)<sub>2</sub> Nanoneedles Mesh with Tunable Wettability for Nonaqueous Multiphase Liquid Separation

Liu, Jing; Wang, Li; Wang, Nü; Guo, Fengyun; Hou, Lanlan; Chen, Yuee; Liu, Jingchong; Zhao, Yong; Jiang, Lei

doi:10.1002/smll.201600499

Cited by 80 publications

(67 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, matchstick-like nanostructured Cu 2 S copper mesh can turn from superhydrophilic to superhydrophobic after two weeks of storage in air without any modification 76 . The general strategy is to create diverse micro/nanostructures on a substrate and then engineer the surface chemical composition regulation to dynamically build smart surfaces with controlled wettability and hence control the separation of oil/water mixtures 74 . In addition, after the oil/water separation is complete, the wettability of the fabricated mesh can be transitioned back using UV light or temperature.…”

Section: Introductionmentioning

confidence: 99%

Reversibly switching water droplets wettability on hierarchical structured Cu2S mesh for efficient oil/water separation

Sheng

Cao

et al. 2019

Sci Rep

View full text Add to dashboard Cite

Surfaces with reversible wettability have broad applications but remain challenging since the switching process is usually energy intensive and complex. In this paper, a pyramid shaped Cu 2 S film with hierarchical micro/nanostructures is formed on a commercial copper mesh. This film is formed by a spontaneous redox sulfuration reaction and results in a roughened surface, which enables reversible wetting transition between superhydrophilicity to superhydrophobicity. This switching occurs by simple processes such as alternately storing in air or using an ethanol solution treatment and yields cyclic wettability switching for many cycles. This convenient wetting transition behavior, as well as strong stability and efficient oil/water separation with efficiency exceeding 98%, renders it as a potentially useful mesh material for switchable surfaces.

show abstract

Section: Introductionmentioning

confidence: 99%

Reversibly switching water droplets wettability on hierarchical structured Cu2S mesh for efficient oil/water separation

Sheng

Cao

et al. 2019

Sci Rep

View full text Add to dashboard Cite

show abstract

“…A particular challenge faced by modern nanofabrication is tailoring the outermost surface chemistry after nanostructures are produced. This is important because, surface chemistry often becomes another variable to account for when defining wetting behaviour at the nanoscale . To this end plasma assisted nanostructuring and coating methods have the advantage to allow the production of well‐defined substrates, with controlled chemistry .…”

Section: Where To From Now?mentioning

confidence: 99%

Questions and Answers on the Wettability of Nano‐Engineered Surfaces

MacGregor

Vasilev

2017

Adv Materials Inter

View full text Add to dashboard Cite

Surface roughening has long been used to confer materials remarkable wetting properties, such as super hydrophobicity. When roughness belongs to the microscale, existing models can, to some extent, explain and predict real‐world wetting states. With the advent of nanotechnology, however, a multitude of nano‐engineered materials are being developed and unexpected wetting behaviors have been observed which cannot be described by conventional theories. While it is clear that advanced nanotextured materials are essential to a vast range of ground breaking technologies, the intricate mechanisms governing the wetting of such surfaces—at the limit of validity of continuum theories—also need to be clarified. This review aims at presenting what is known and what remains to be discovered about the wettability of nanoengineered materials. The advantages and uniqueness of nanostructured substrates is highlighted first, with a focus on practical applications benefitting from the distinctive wetting properties of nanorough substrates. Classic wetting theories and their limitations are briefly discussed, before describing with a top down vision, why the wetting of nanostructured substrates differ from that of microtextured surfaces. Recent experimental and theoretical studies which contributed to the progress in this field are considered, before outlining potential future areas of research.

show abstract

“…Based on this proper microstructure, through simple modification, superhydrophobicity can be obtained more feasibly. According to the above, many methods including chemical or electrochemical treatment, laser etching, and plasma processing have been reported [15,[36][37][38][39][40][41]. However, the most applied method to obtain superhydrophobicity is by introducing fluorinated low surface-energy chemicals on micro-/nanohierarchical structures [38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

“…Due to the mechanical workability and relatively low cost, a copper mesh has been chosen as one of the most commonly used materials for the oil/water separation [42,43]. Meantime, various morphologies are also reported on the copper substrate, such as needle-like, hair-like, arch-like, and pine needle-like structures [40,41]. But the superhydrophobic surface should be obtained after fluorination, which is more expensive and unfriendly to the environment.…”

Section: Introductionmentioning

confidence: 99%

Superhydrophobic Hair-Like Nanowire Membrane for the Highly Efficient Separation of Oil/Water Mixtures

Fang

Liu

Lei

et al. 2020

Journal of Nanomaterials

View full text Add to dashboard Cite

Water pollution caused by oil leakage and oily wastewater has become a serious environmental problem. Therefore, it is important to develop an efficient material to remove oil from water. Given the cost and efficiency, the membrane with superhydrophobicity is the most used material for the separation of oil/water mixtures. However, many works have been done through modification with a fluorinated reagent, causing high cost and damage to the environment. In this work, a simple and fast two-step method is employed to achieve a superhydrophobic hair-like nanowire membrane. Through the alkali-assisted oxidation process and modification with nonfluorinated low surface energy chemical, the so-obtained membrane (denoted as SHM), with the water contact angle of about 164°, exhibits excellent separation efficiency for binary mixtures of water and oils (toluene, hexane, gasoline, and so on). Meantime, this membrane also exhibits excellent durability and reusability in the long-term separation process, indicating its great potential for practical application in the future.

show abstract

A Robust Cu(OH)₂ Nanoneedles Mesh with Tunable Wettability for Nonaqueous Multiphase Liquid Separation

Cited by 80 publications

References 38 publications

Reversibly switching water droplets wettability on hierarchical structured Cu2S mesh for efficient oil/water separation

Reversibly switching water droplets wettability on hierarchical structured Cu2S mesh for efficient oil/water separation

Questions and Answers on the Wettability of Nano‐Engineered Surfaces

Superhydrophobic Hair-Like Nanowire Membrane for the Highly Efficient Separation of Oil/Water Mixtures

Contact Info

Product

Resources

About

A Robust Cu(OH)2 Nanoneedles Mesh with Tunable Wettability for Nonaqueous Multiphase Liquid Separation

Cited by 80 publications

References 38 publications

Reversibly switching water droplets wettability on hierarchical structured Cu2S mesh for efficient oil/water separation

Reversibly switching water droplets wettability on hierarchical structured Cu2S mesh for efficient oil/water separation

Questions and Answers on the Wettability of Nano‐Engineered Surfaces

Superhydrophobic Hair-Like Nanowire Membrane for the Highly Efficient Separation of Oil/Water Mixtures

Contact Info

Product

Resources

About

A Robust Cu(OH)₂ Nanoneedles Mesh with Tunable Wettability for Nonaqueous Multiphase Liquid Separation