In situ photo-thermal conversion nanofiber membrane consisting of hydrophilic PAN layer and hydrophobic PVDF-ATO layer for improving solar-thermal membrane distillation

Zhao, Jianqing; Huang, Qinglin; Gao, Shangpeng; Piao, Hongwei; Quan, Quan; Xiao, Changfa

doi:10.1016/j.memsci.2021.119500

Cited by 27 publications

(10 citation statements)

References 22 publications

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“…(b) Evaporation rates of the PC@PPy-30 aerogel evaporator in treating brines of different salinities. (c) Comparison of the desalination performance of the PC@PPy-30 aerogel evaporator with previously reported electrospun nanofiber-based evaporators. − ,, (d) Photographs showing the variation of the PC@PPy-30 aerogel surface with time while treating 3.5% brine (upper row) and 20% brine (lower row). (e) Evaporation rate variations in 480 min of the PC@PPy-30 aerogel when treating brines with different concentrations.…”

Section: Resultsmentioning

confidence: 99%

“…The performance of solar vapor generation significantly depends on the material and structure of the supporting substrate . Electrospun nanofibers have been widely used for architecting various structural evaporators, owing to their large specific area, good flexibility, and ease of functionalization. − Gao et al constructed a nanofibrous membrane-based evaporator through electrospinning polyvinylidene fluoride and polyacrylonitrile (PAN) embedded with carbon black, and the hydrophobic property of the bottom layer and the photothermal property of the upper layer endow the evaporator with floatability and high light absorption . Furthermore, nanofiber-based aerogels as a typical three-dimensional (3D) architecture with ultralow apparent density, large porosity, and low thermal conductivity properties are more beneficial for thermal management and vapor diffusion. , Recently, Dong et al fabricated carbon nanotube (CNT)-deposited silica nanofibrous aerogels using the fiber freeze-shaping technology, which achieved an evaporation rate of 1.5 kg m –2 h –1 under one sun irradiation and possessed a salt-resistance function .…”

Section: Introductionmentioning

confidence: 99%

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Engineering Hierarchically Structured Nanofibrous Aerogels for Highly Efficient Solar Vapor Generation and Desalination

Liu

et al. 2023

ACS Sustainable Chem. Eng.

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Electrospun nanofiber-based evaporators have emerged as advanced candidates in the field of solar-driven desalination, stemming from their favorable flexibility, high porosity, and ease of functionalization. Herein, a novel and facile template-free method is developed for preparing polypyrrole nanorod-adorned nanofibrous aerogels, which are reliable and efficient for solar desalination. More notably, polypyrrole plays a crucial cross-linking role in promoting structural stability, avoiding the use of harmful cross-linkers. The presence of polypyrrole nanorods has further augmented light absorption, decreased vaporization enthalpy, and enhanced evaporation performance with an optimal evaporation rate of 2.37 kg m–2 h–1. In addition, the hierarchically structured nanofibrous aerogel enables durable and stable evaporation out of high-concentration brines, superior to most of the electrospun nanofiber-based evaporators. Taking advantage of the excellent photothermal property, the aerogel assembled with a thermoelectric generator can obtain 58.59 mV voltage output under one sun illumination. The exceptional aerogel holds great potential in harnessing solar energy to address the issue of water and energy scarcity.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Engineering Hierarchically Structured Nanofibrous Aerogels for Highly Efficient Solar Vapor Generation and Desalination

Liu

et al. 2023

ACS Sustainable Chem. Eng.

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“…The hydrophilic PAN layer helps very effective localized heating transfer in the PVDF-ATO/PAN membrane, presenting high potential for scalable water purification and low-cost water desalination. 51 To sum up, PAN has been used as a successful material for MD application to enhance the water flux which is critical and challenging for this process.…”

Section: Pervaporationmentioning

confidence: 99%

Section: Application Of Pan-based Membranesmentioning

confidence: 99%

“…In-situ temperature growth on membrane superficial layer (PVDF-ATO) motivated by solar light, illumination was approved by a thermal imaging system given in Figure C. The hydrophilic PAN layer helps very effective localized heating transfer in the PVDF-ATO/PAN membrane, presenting high potential for scalable water purification and low-cost water desalination …”

Section: Application Of Pan-based Membranesmentioning

confidence: 99%

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Polyacrylonitrile in the Preparation of Separation Membranes: A Review

Vatanpour

Paşaoğlu

Köse-Mutlu

et al. 2023

Ind. Eng. Chem. Res.

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Polyacrylonitrile (PAN) is a hydrophilic polymer with good chemical resistance, low price, and excellent processability for fabricating membranes, especially for electrospun nanofiber-based membranes. In this review, the recent developments in the application and modification of PAN membranes are discussed, focusing on some applications such as pervaporation (PV), ion exchange, hemodialysis, membrane distillation, adsorption membrane, and water and wastewater treatment. First, the physicochemical characteristics and the synthesis techniques of the PAN are discussed, and next, the PAN application in the fabrication of membrane is reviewed. Different PAN membranes with their fabrication techniques are reviewed with detailed studies focused on the modification methods. By using different modifiers especially nanomaterial blending, the physicochemical properties and performance (membrane structure, permeability, mechanical strength, hydrophilicity, porosity, and surface charge) of the PAN membranes are improved. Finally, the challenges and future perspective of these membranes are discussed. The review of research progress in this paper may provide an insight into the development of high-performance PAN membranes and spread the applications of PAN membranes in different separation processes in the future.

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Beyond Symmetry: Exploring Asymmetric Electrospun Nanofiber Membranes for Liquid Separation

Lu,

Wang,

et al. 2023

Adv Funct Materials

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Composite membranes with asymmetric traits have gained attention in liquid separation, featuring gradient chemical and physical attributes that align or oppose mass transfer direction. Chemically asymmetric configurations harness internal driving forces to heighten separation efficiency, rendering them an appealing option for heightened separation efficiency and fouling prevention. Concurrently, the internal hierarchical structure differences within composite membranes—such as fiber‐based structural adjustments and the gradient density of functional layers—yield the dual benefits of effective liquid repelling and heightened transport efficiency. Unlike conventional phase‐change methods, electrospinning technology possesses advantages in constructing and governing composite fibrous membrane materials with asymmetric chemistry and hierarchical structures, driven by its adaptable stacking methodologies. Notably, the inherent pore structure of electrospun nanofibrous membranes emerges as a proven solution for minimizing transport resistance. In recent times, interest has surged in electrospun nanofibrous membranes endowed with internal asymmetric properties. However, the spotlight has predominantly graced Janus membranes, spotlighting opposite wettability on different sides, leaving other facets of asymmetric membrane enhancement somewhat underexplored. This comprehensive work unveils recent strides in design, fabrication, facilitated transport mechanisms, and real‐world liquid separation applications, all under the aegis of electrospun nanofiber membranes, each endowed with distinct asymmetric properties.

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In situ photo-thermal conversion nanofiber membrane consisting of hydrophilic PAN layer and hydrophobic PVDF-ATO layer for improving solar-thermal membrane distillation

Cited by 27 publications

References 22 publications

Engineering Hierarchically Structured Nanofibrous Aerogels for Highly Efficient Solar Vapor Generation and Desalination

Engineering Hierarchically Structured Nanofibrous Aerogels for Highly Efficient Solar Vapor Generation and Desalination

Polyacrylonitrile in the Preparation of Separation Membranes: A Review

Beyond Symmetry: Exploring Asymmetric Electrospun Nanofiber Membranes for Liquid Separation

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