Trade-off in membrane distillation with monolithic omniphobic membranes

Wang, Wei; Du, Xuewei; Vahabi, Hamed; Zhao, Song; Yin, Yiming; Kota, Arun K.; Tong, Tiezheng

doi:10.1038/s41467-019-11209-6

Cited by 124 publications

(98 citation statements)

References 59 publications

(71 reference statements)

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“…Omniphobic surfaces that repel liquids of different polarities are critical for a variety of applications, such as carbon dioxide capture, [1] microfluidic devices, [2,3] water-energy harvesting, [4] chemical shielding, [5] and water treatment. [6] The degree to which a surface repels liquids depends on two critical properties of the surface: surface energy and topography. The surface energy determines the interfacial interactions between the liquid and solid phases, through influencing the intermolecular forces, [7][8][9][10][11][12][13][14][15] while surface topography defines the interfacial areas.…”

Section: Introductionmentioning

confidence: 99%

All Dry Bottom‐Up Assembly of Omniphobic Interfaces

Ghaleni

Kaviani

Rajwade

et al. 2020

Adv Materials Inter

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Creating reentrant structures on flexible and porous substrates is a significant challenge for the scalable fabrication of omniphobic membranes. The design of such membranes requires control over the surface topography and chemistry of the interfacial domains. Here, a continuous bottom-up method, based on initiated chemical vapor deposition (iCVD), is developed to enable the fabrication of flexible omniphobic membranes. The developed membranes hinder the intrusion of droplets of low surface energy liquids (e.g., ethanol) colliding with the surface at a velocity of about 2 m/s. The stable wetting resistance of the membranes allows for the desalination of low surface energy synthetic and municipal wastewater streams.

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Section: Introductionmentioning

confidence: 99%

All Dry Bottom‐Up Assembly of Omniphobic Interfaces

Ghaleni

Kaviani

Rajwade

et al. 2020

Adv Materials Inter

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“…The addition of certain species such as oils or surfactants to the feed water can dramatically change the wetting propensity of a given membrane. The development of omniphobic membranes are an attempt to provide high LEP values for various feed waters, including those with low surface tension [33,34]. 3) Porosity.…”

Section: Membrane Propertiesmentioning

confidence: 99%

The use of carbon nanomaterials in membrane distillation membranes: a review

Leaper

Abdel‐Karim

Gorgojo

2021

Front. Chem. Sci. Eng.

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Membrane distillation (MD) is a thermal-based separation technique with the potential to treat a wide range of water types for various applications and industries. Certain challenges remain however, which prevent it from becoming commercially widespread including moderate permeate flux, decline in separation performance over time due to pore wetting and high thermal energy requirements. Nevertheless, its attractive characteristics such as high rejection (ca. 100%) of nonvolatile species, its ability to treat highly saline solutions under low operating pressures (typically atmospheric) as well as its ability to operate at low temperatures, enabling waste-heat integration, continue to drive research interests globally. Of particular interest is the class of carbon-based nanomaterials which includes graphene and carbon nanotubes, whose wide range of properties have been exploited in an attempt to overcome the technical challenges that MD faces. These low dimensional materials exhibit properties such as high specific surface area, high strength, tuneable hydrophobicity, enhanced vapour transport, high thermal and electrical conductivity and others. Their use in MD has resulted in improved membrane performance characteristics like increased permeability and reduced fouling propensity. They have also enabled novel membrane capabilities such as in-situ fouling detection and localised heat generation. In this review we provide a brief introduction to MD and describe key membrane characteristics and fabrication methods. We then give an account of the various uses of carbon nanomaterials for MD applications, focussing on polymeric membrane systems. Future research directions based on the findings are also suggested.

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“…Previous results of alternative surface fluorine-based membranes fabricated with polymers [41] or graphene oxide [42] (applied on ion exchange) have been reported but involved complex wet chemical routes to reach only a hydrophobic state. However, omniphobic polymeric membranes for distillation [43,44] found in the literature are neither fully water repellent nor slippery. Moreover, attending to the approaches based on the nanostructuration of membranes with nanoparticles, [45,46] the omniphobicity has only linked to sliding capacity against water droplets.…”

Section: Photoactivation Of 3d Nanomembranes For a Selective Control Wettingmentioning

confidence: 99%

Plasma‐Assisted Deposition of TiO₂ 3D Nanomembranes: Selective Wetting, Superomniphobicity, and Self‐Cleaning

Montes

Román

García‐Casas

et al. 2021

Adv Materials Inter

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Fabrication of tunable wetting surfaces is sought for the last years given its importance on energy, biomaterials and antimicrobials, water purification, microfluidics, and smart surfaces. Liquid management on surfaces mainly depends on the control at the micro‐ and nanoscale of both roughness and chemical composition. Herein, the combination of a soft‐template method and plasma‐enhanced chemical vapor deposition is presented for the synthesis of TiO2 nanofibers on porous substrates such as cellulose and stainless‐steel membranes. The protocol, carried out under mild conditions, produces 3D nanomembranes with superhydrophobicity and oleophilicity that are tested as microliter water/oil filters. Photoactivation of TiO2 by UV illumination provides a straightforward approach for wetting tunability that converts the surface into amphiphilic. A final chemical modification of the TiO2 nanofibers by embedding them in an elastomeric polymeric shell and by fluorine‐based grafting opens the path toward the formation of superomniphobic and self‐cleaning surfaces with long‐lasting lifetimes. Thus, a reliable procedure is demonstrated for the fabrication of TiO2 nanofibers, which allows the modification of porous supports and provides an innovative route for the development of 3D nanomembranes with under design wetting. This protocol is extendable to alternative metal oxides, metals, and core@shell nanoarchitectures with potential multifunctionalities.

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Trade-off in membrane distillation with monolithic omniphobic membranes

Cited by 124 publications

References 59 publications

All Dry Bottom‐Up Assembly of Omniphobic Interfaces

All Dry Bottom‐Up Assembly of Omniphobic Interfaces

The use of carbon nanomaterials in membrane distillation membranes: a review

Plasma‐Assisted Deposition of TiO₂ 3D Nanomembranes: Selective Wetting, Superomniphobicity, and Self‐Cleaning

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Trade-off in membrane distillation with monolithic omniphobic membranes

Cited by 124 publications

References 59 publications

All Dry Bottom‐Up Assembly of Omniphobic Interfaces

All Dry Bottom‐Up Assembly of Omniphobic Interfaces

The use of carbon nanomaterials in membrane distillation membranes: a review

Plasma‐Assisted Deposition of TiO2 3D Nanomembranes: Selective Wetting, Superomniphobicity, and Self‐Cleaning

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Product

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Plasma‐Assisted Deposition of TiO₂ 3D Nanomembranes: Selective Wetting, Superomniphobicity, and Self‐Cleaning