Intrinsic microspheres structure of electrospun nanofibrous membrane with rational superhydrophobicity for desalination via membrane distillation

Zhou, Lei; Li, Chang Long; Chang, Pei Thing; Tan, Soon Huat; Ahmad, Abdul Latif; Low, Siew Chun

doi:10.1016/j.desal.2022.115594

Cited by 38 publications

(5 citation statements)

References 42 publications

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“…High‐boiling‐point solvents could hinder fiber solidification. [ 44 , 55 ] As a result, beaded nanofibers could be fabricated using a high‐boiling‐point solvent during electrospinning. [ 44 , 55 ] Interestingly, beaded nanofiber membranes possessed higher WCA than the non‐beaded ones, [ 44 , 56 ] which might be ascribed to its hierarchically reentrant‐like structure.…”

Section: Methods To Enhance Anti‐wetting Propertiesmentioning

confidence: 99%

“…[ 44 , 55 ] As a result, beaded nanofibers could be fabricated using a high‐boiling‐point solvent during electrospinning. [ 44 , 55 ] Interestingly, beaded nanofiber membranes possessed higher WCA than the non‐beaded ones, [ 44 , 56 ] which might be ascribed to its hierarchically reentrant‐like structure. Using N ‐methyl‐2‐pyrrolidone with the high boiling point solvent instead of DMF/acetone, Zhou et al.…”

Section: Methods To Enhance Anti‐wetting Propertiesmentioning

confidence: 99%

“…Using N ‐methyl‐2‐pyrrolidone with the high boiling point solvent instead of DMF/acetone, Zhou et al. [ 44 ] electrospun a beaded nanofiber membrane with superhydrophobicity (WCA > 150°). Remarkably, by the one‐step controlled‐electrospinning method, the resultant membrane possessed a hierarchical reentrant‐like structure.…”

Section: Methods To Enhance Anti‐wetting Propertiesmentioning

confidence: 99%

“…Since the long‐chain organofluorides tend to accumulate in animals through food chains, [ 78 , 80 ] as reflected by the high value of log K ow , [ 78a ] some ultrashort‐chain organofluorides (e.g., FC1 in Table S5 , Supporting Information) or other green modifiers, and even the modifier‐free methods, should be considered more in practice. [ 43 , 44 , 45 , 47 , 78 , 81 ]…”

Section: Methods To Enhance Anti‐wetting Propertiesmentioning

confidence: 99%

See 3 more Smart Citations

Enhanced Anti‐Wetting Methods of Hydrophobic Membrane for Membrane Distillation

Zhang

Zhao

2023

Advanced Science

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Increasing issues of hydrophobic membrane wetting occur in the membrane distillation (MD) process, stimulating the research on enhanced anti‐wetting methods for membrane materials. In recent years, surface structural construction (i.e., constructing reentrant‐like structures), surface chemical modification (i.e., coating organofluorides), and their combination have significantly improved the anti‐wetting properties of the hydrophobic membranes. Besides, these methods change the MD performance (i.e., increased/decreased vapor flux and increased salt rejection). This review first introduces the characterization parameters of wettability and the fundamental principles of membrane surface wetting. Then it summarizes the enhanced anti‐wetting methods, the related principles, and most importantly, the anti‐wetting properties of the resultant membranes. Next, the MD performance of hydrophobic membranes prepared by different enhanced anti‐wetting methods is discussed in desalinating different feeds. Finally, facile and reproducible strategies are aspired for the robust MD membrane in the future.

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Section: Methods To Enhance Anti‐wetting Propertiesmentioning

confidence: 99%

Section: Methods To Enhance Anti‐wetting Propertiesmentioning

confidence: 99%

Section: Methods To Enhance Anti‐wetting Propertiesmentioning

confidence: 99%

Section: Methods To Enhance Anti‐wetting Propertiesmentioning

confidence: 99%

See 2 more Smart Citations

Enhanced Anti‐Wetting Methods of Hydrophobic Membrane for Membrane Distillation

Zhang

Zhao

2023

Advanced Science

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“…The surface roughness of an electrospun structure is adjusted by the deposited fibers, while the surface energy is controlled by the selected fiber material. For example, to develop low-adhesive superhydrophobicity, fibers with secondary fiber morphology including nanoparticle-doped fibers 14 and beaded fibers 15 are produced to increase fiber surface roughness. Moreover, the surface energy of fibers is often reduced by using synthesized polymers with low surface energy 16 or by coating fibers with a low surface energy material, e.g., poly(perfluoroalkyl ethyl methacrylate) (PPFEMA).…”

Section: ■ Introductionmentioning

confidence: 99%

Development of Adjustable High- to Low-Adhesive Superhydrophobicity Using Aligned Electrospun Fibers

Zhang,

Li,

Tan

2023

Langmuir

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Superhydrophobic surfaces based on electrospun fibrous structures exhibit advantages of additive manufacturing and enable the passage of gases. Compared to randomly deposited fibers, directionally aligned fibers improve the control of surface wetting by a specified fiber orientation and predictable liquid−fiber contact interface. In this article, we create superhydrophobicity with adjustable adhesion based on the understanding of droplet wetting behavior on directionally aligned fibers. Directionally aligned polystyrene fibers with different diameters and interfiber distances (l) are produced using electrospinning with a rotating fin collector. The wetting behavior of droplets on the surfaces dressed by aligned fibers is characterized, and a thermodynamic model of wetting behavior is established to guide the experimental studies. As a result, highadhesive superhydrophobicity is achieved on weak hydrophobic substrate surfaces dressed by aligned polystyrene fibers with a diameter of 1.8 μm and l between 5 and 130 μm. Water droplets (2 μL) exhibit a maximum contact angle of 156°and adhere to the fiber-dressed surfaces by tilting upside down. Low-adhesive superhydrophobicity is achieved by introducing an additional layer of aligned fibers to increase the transition energy barrier. On the dual-layer structure with an upper-layer l of 9 μm, droplets show a contact angle of 155°and can readily roll off the surface. Moreover, increasing the upper-layer l to 15 μm reserves the surface to high-adhesive superhydrophobicity.

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A Facile and Strategic Approach to Superhydrophobic Fibrous Structure with Biaxially Aligned Electrospun Porous Fibers

Zhang,

Li,

Huang

et al. 2023

Adv Materials Inter

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Electrospun fibrous structures can be developed superhydrophobic while remaining breathable. However, current electrospinning‐based methods for developing superhydrophobicity require complex fabrication processes and multiple raw materials, lacking a facile approach to superhydrophobicity using electrospun fibers. Inspired by a cultural relic known as Plain Gauze Gown, a fibrous structure consisting two layers of porous fibers aligned in warp and weft directions by simple electrospinning is developed. Through investigation of wetting behavior, an unique Cassie–Baxter‐“restoring” (CaRe) wetting contributing to a stable Cassie–Baxter state is unveiled in the developed structure. The CaRe wetting ensures that droplet stays on the upper‐layer fibers even at a sparse inter‐fiber distance, enabling strategically reaching superhydrophobicity by lowering structure solidity. Remarkably, the developed structure with water contact angle between 159° and 162° and roll‐off angle from 10° to 3° has a water vapor transmission rate of 20.8 kg m−2 d−1, which is the highest value among all superhydrophobic electrospun structures reported, and it is also waterproof and semi‐transparent. These features make the structure suitable for a wide range of applications, including developing waterproof, breathable, and superhydrophobic membrane with simple preparation and low cost, and as a surface layer for wearable electronics that facilitates sweat evaporation and prevents water intrusion.

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Intrinsic microspheres structure of electrospun nanofibrous membrane with rational superhydrophobicity for desalination via membrane distillation

Cited by 38 publications

References 42 publications

Enhanced Anti‐Wetting Methods of Hydrophobic Membrane for Membrane Distillation

Enhanced Anti‐Wetting Methods of Hydrophobic Membrane for Membrane Distillation

Development of Adjustable High- to Low-Adhesive Superhydrophobicity Using Aligned Electrospun Fibers

A Facile and Strategic Approach to Superhydrophobic Fibrous Structure with Biaxially Aligned Electrospun Porous Fibers

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