Micro/nanoscale hierarchical structured ZnO mesh film for separation of water and oil

Tian, Dongliang; Zhang, Xiaofang; Wang, Xiao; Zhai, Jin; Jiang, Lei

doi:10.1039/c1cp20671k

Cited by 197 publications

(148 citation statements)

References 43 publications

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“…Membranes are typically classified as either hydrophobic or hydrophilic [3][4][5][6][7][8][9][10] . Their wettability by oil is often not specified because, in most cases, such membranes are oleophilic, that is, their contact angle with oil is < 90°.…”

mentioning

confidence: 99%

“…Their wettability by oil is often not specified because, in most cases, such membranes are oleophilic, that is, their contact angle with oil is < 90°. Hydrophobic (or superhydrophobic [9][10][11] ) and oleophilic membranes are typically used in energyintensive cross-flow filtration systems 3,6,7 because they are unsuitable for gravity-driven oil-water separation. This is because water naturally settles below oil and against the membrane owing to its higher density, forming a barrier layer that prevents oil permeation.…”

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confidence: 99%

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Hygro-responsive membranes for effective oil–water separation

et al. 2012

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There is a critical need for new energy-efficient solutions to separate oil-water mixtures, especially those stabilized by surfactants. Traditional membrane-based separation technologies are energy-intensive and limited, either by fouling or by the inability of a single membrane to separate all types of oil-water mixtures. Here we report membranes with hygro-responsive surfaces, which are both superhydrophilic and superoleophobic, in air and under water. our membranes can separate, for the first time, a range of different oil-water mixtures in a singleunit operation, with >99.9% separation efficiency, by using the difference in capillary forces acting on the two phases. our separation methodology is solely gravity-driven and consequently is expected to be highly energy-efficient. We anticipate that our separation methodology will have numerous applications, including the clean-up of oil spills, wastewater treatment, fuel purification and the separation of commercially relevant emulsions.

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confidence: 99%

Hygro-responsive membranes for effective oil–water separation

et al. 2012

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“…[135,136] The liquid permeability and repellency are crucial to control the flow by the electrostatic potential. Tabassian et al reported electric-field-induced wetting of nickel meshes coated by graphene for use as flow control devices (Figure 9).…”

Section: Electric-field-induced Selective Permeation For Separationmentioning

confidence: 99%

External‐Field‐Induced Gradient Wetting for Controllable Liquid Transport: From Movement on the Surface to Penetration into the Surface

Zhang

et al. 2017

Advanced Materials

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103

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External‐field‐responsive liquid transport has received extensive research interest owing to its important applications in microfluidic devices, biological medical, liquid printing, separation, and so forth. To realize different levels of liquid transport on surfaces, the balance of the dynamic competing processes of gradient wetting and dewetting should be controlled to achieve good directionality, confined range, and selectivity of liquid wetting. Here, the recent progress in external‐field‐induced gradient wetting is summarized for controllable liquid transport from movement on the surface to penetration into the surface, particularly for liquid motion on, patterned wetting into, and permeation through films on superwetting surfaces with external field cooperation (e.g., light, electric fields, magnetic fields, temperature, pH, gas, solvent, and their combinations). The selected topics of external‐field‐induced liquid transport on the different levels of surfaces include directional liquid motion on the surface based on the wettability gradient under an external field, partial entry of a liquid into the surface to achieve patterned surface wettability for printing, and liquid‐selective permeation of the film for separation. The future prospects of external‐field‐responsive liquid transport are also discussed.

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“…Therefore, the development of advanced oil/water separation materials that can selectively absorb oil (or water) while completely repelling water (or oil) is highly desirable. 21,22 Recently, some other materials with special wettability have been also fabricated for oil/water separation [23][24][25][26][27][28][29] and the related review has been reported. 30 Herein, we only focus on the polyurethane-based materials for oil/water separation.…”

Section: Introductionmentioning

confidence: 99%

Recent Progress of Polyurethane-Based Materials for Oil/Water Separation

Guo

Liu

Dang

et al. 2017

NANO

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With the development of society, oil pollution has become more and more serious, it is becoming a global issue to separate oil and water mixture. Currently, a variety of functional materials have been successfully prepared for oil/water separation. Among them, polyurethane is an attractive candidate due to its low cost, wear-resistance and excellent mechanical properties. This report summarizes the design strategy of polyurethane-based materials and their applications in oil/ water separation. The progress made so far will guide further development of polyurethane-based materials for oil/water separation.

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Micro/nanoscale hierarchical structured ZnO mesh film for separation of water and oil

Cited by 197 publications

References 43 publications

Hygro-responsive membranes for effective oil–water separation

Hygro-responsive membranes for effective oil–water separation

External‐Field‐Induced Gradient Wetting for Controllable Liquid Transport: From Movement on the Surface to Penetration into the Surface

Recent Progress of Polyurethane-Based Materials for Oil/Water Separation

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