Composite membrane with electrospun multiscale-textured surface for robust oil-fouling resistance in membrane distillation

Hou, Deyin; Wang, Zhangxin; Wang, Kunpeng; Wang, Jun; Lin, Shihong

doi:10.1016/j.memsci.2017.10.017

Cited by 91 publications

(43 citation statements)

References 63 publications

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“…An alternate approach to form a hydrophilic layer in a Janus membrane was electrospinning. A nanofibrous network comprising both cellulose acetate and silica nanoparticles could be simultaneously coated on a hydrophobic PTFE substrate in one-step electrospinning; a low water contact angle of 40°and high underwater oil contact angle of 154°were achieved (Hou et al 2018) (Fig. 20.10).…”

Section: Nanofibers For Wastewater Treatmentmentioning

confidence: 99%

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Nanofibers for Water and Wastewater Treatment: Recent Advances and Developments

Tijing

Yao

Ren

et al. 2018

Energy, Environment, and Sustainability

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Materials of nanofibrous morphology and structure are attractive for solving environmental problems including water-related issues. In recent years, increasing interest is geared on the use of specially designed electrospun nanofibers for water/wastewater treatment applications. The nanofibers can be used in the form of nonwoven structures, as stand-alone membranes, as support layer or as a surface modification layer that enables added functionality to a composite material. Continuous research has been carried out in optimizing the nanofiber membrane design and structure by manipulating material, process and surrounding parameters in the electrospinning process. This chapter highlights the recent advances and developments on the potential and application of electrospun nanofibers for water/ wastewater treatment. Comprehensive discussion is presented here on various designs and structures of nanofibers and their applications to water-related treatment and the future prospects of such materials.

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Section: Nanofibers For Wastewater Treatmentmentioning

confidence: 99%

“…The saline oil-in-water emulsion with 600 mM NaCl and 1000 mg/L crude oil was used as the feed. The flow rate at feed and permeate side were 70 L/H (Hou et al 2018)…”

Section: Nanofibers For Wastewater Treatmentmentioning

confidence: 99%

Nanofibers for Water and Wastewater Treatment: Recent Advances and Developments

Tijing

Yao

Ren

et al. 2018

Energy, Environment, and Sustainability

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“…The pristine SFM was underwater oleophobic as evidenced by the relatively high mineral oil CA of 118.5° (Figure , bottom row). The observed underwater oleophobicity of the pristine SFM is attributed to the strong repulsion between the nonpolar, hydrophobic mineral oil and the hydration layer formed on the silica fiber surface . Underwater mineral oil CA on the VCNTF US @SFM membrane was also found to be high (126.3°), likely due to the same mechanism of strong repulsion between oil and the hydrophilic surface.…”

Section: Resultsmentioning

confidence: 83%

Engineering Carbon Nanotube Forest Superstructure for Robust Thermal Desalination Membranes

Sun

Boo

Shi

et al. 2019

Adv Funct Materials

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Desalination by membrane distillation (MD) using low-grade or waste heat provides a potential route for sustainable water supply. Nonwetting, porous membranes that provide a selective pathway for water vapor over nonvolatile salt are at the core of MD desalination. Conventional water-repelling MD membranes (i.e., hydrophobic and superhydrophobic membranes) fail to ensure long-term desalination performance due to pore wetting and surface fouling. To address these challenges, a defect-free carbon nanotube forest (CNTF) is engineered in situ on a porous electrospun silica fiber substrate. The engineered CNTF forms an ultrarough and porous interface structure, allowing outstanding wetting resistance against water in air and oil underwater. As a result of this antiwetting property, the composite CNTF membrane displays a stable water vapor flux and a near complete salt rejection (>99.9%) in the desalination of highly saline water containing low surface tension contaminants. The antimicrobial property of the composite CNTF membrane imparted by the unique forest-like architecture and the oxidative effect of carbon nanotubes (CNTs) are further demonstrated. The results exemplify an effective strategy for engineering CNT architecture to elucidate the structure-property-performance relationship of the nanocomposite membranes and to guide the design of robust thermal desalination membranes. and the inability of RO to desalinate high-salinity waters are major practical challenges. [2] Membrane distillation (MD) is an emerging thermal-driven desalination technology, capable of using low-grade or waste heat to drive selective permeation of water vapor over nonvolatile species (e.g., salt) through a porous hydrophobic membrane. [3] MD is highly advantageous for desalinating hypersaline brines that cannot be treated by RO desalination. However, MD desalination performance is significantly hampered by the inability of conventional hydrophobic membranes to maintain long-term antiwetting and antifouling properties, particularly in the presence of low surface tension contaminants in the feed water. [4] Thus, developing high-performance MD membranes with robust wetting and fouling resistance is crucial for widespread adoption of MD desalination.Recent studies have demonstrated the fabrication of MD membranes with improved wetting resistance by tailoring the surface chemistry and nanostructure. [5] Specifically, the membrane surface in these studies was functionalized with extremely low interfacial energy materials, such as fluoroalkylsilane (FAS), to reduce the surface free energy and thus the attraction of water molecules. Ultralow interfacial energy modification results in a surface exhibiting a water contact angle >90°, regardless of surface morphology. [6] To have an oil-repelling nature as wellan important property for treatment of waters containing oil and Carbon Nanotube Forests

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“…Hou et al [90] developed composite membranes using electrospinning with a hydrophobic substrate and a hydrophilic top surface to alleviate the oil fouling phenomenon in membrane distillation. PTFE hydrophobic substrate was coated with two different hydrophilic fibrous networks (CA plus polymer-nanoparticle composite silica nanoparticles (SiNPs)).…”

Section: Polymermentioning

confidence: 99%

Review on Membranes for the Filtration of Aqueous Based Solution: Oil in Water Emulsion

Gebreslase¹,

Bousquet²,

Bouyer

2018

J Membr Sci Technol

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This review provides insight into the application of membrane technology in the filtration of aqueous solution generated from different industries. Due to the ever-evolving and demanding strict attention to rules and regulation for discharging of oily waste water, researchers have investigated membrane technology as a best and suitable method for separation of oil in oil-water emulsion. Membrane-based separation processes are becoming a novel material to treat oily wastewater due its facile operation process and effective in removal of oil from oil/water emulsion. This review summarizes or highlights the recent development of advanced membrane technology employed to separate oil in water emulsion using polymer and ceramic-based membranes and modified membranes via blending, coating, grafting and other techniques. Moreover, integrated membranes system to achieve high separation efficiency over single membrane process is also discussed. Perspective and conclusions concerning the future development of filtration membranes for treatment of oil in water mixture are also provided. A review of membrane technology for oil/water emulsion treatment could have a substantial contribution in developing novel membranes and modification of the existed membranes.

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Composite membrane with electrospun multiscale-textured surface for robust oil-fouling resistance in membrane distillation

Cited by 91 publications

References 63 publications

Nanofibers for Water and Wastewater Treatment: Recent Advances and Developments

Nanofibers for Water and Wastewater Treatment: Recent Advances and Developments

Engineering Carbon Nanotube Forest Superstructure for Robust Thermal Desalination Membranes

Review on Membranes for the Filtration of Aqueous Based Solution: Oil in Water Emulsion

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