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Desalination by dir...
Desalination by direct contact membrane distillation using mixed matrix electrospun nanofibrous membranes with carbon-based nanofillers : a strategic improvement
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- Essalhi, Mohamed (author)
- Umeå universitet,Kemiska institutionen,Department of Structure of Matter, Thermal Physics and Electronics, Faculty of Physics, University Complutense of Madrid, Avda. Complutense s/n, Madrid, Spain
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- Khayet, Mohamed (author)
- Department of Structure of Matter, Thermal Physics and Electronics, Faculty of Physics, University Complutense of Madrid, Avda. Complutense s/n, Madrid, Spain; Madrid Institute for Advanced Studies of Water (IMDEA Water Institute), Calle Punto Net N° 4, Alcalá de Henares, Madrid, Spain
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- Tesfalidet, Solomon (author)
- Umeå universitet,Kemiska institutionen
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- Alsultan, Mohammed (author)
- Umeå universitet,Kemiska institutionen
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- Tavajohi Hassan Kiadeh, Naser (author)
- Umeå universitet,Kemiska institutionen
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(creator_code:org_t)
- Elsevier, 2021
- 2021
- English.
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In: Chemical Engineering Journal. - : Elsevier. - 1385-8947 .- 1873-3212. ; 426
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https://umu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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Abstract
Subject headings
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- Robust hydrophobic and superhydrophobic mixed matrix electrospun nanofibrous membranes (MM-ENMs) have been prepared from low- and high- molecular weight polyvinylidene fluoride with either multi-walled carbon nanotubes or graphene oxide nanofillers (0.05–0.5 wt%). The polymer solutions' properties, including their electrical conductivity, viscosity, and surface tension, were determined and used to guide the design of single-, dual-, and triple-layered MM-ENMs combining layers with different hydrophobic character. All MM-ENMs were subsequently prepared and characterized in terms of their morphology, hydrophobicity, mechanical properties, and direct contact membrane distillation (DCMD) performance. A thinner hydrophobic layer with a thicker hydrophilic support layer in dual-layered MM-ENMs reduced water vapor transport resistance and improved DCMD performance relative to single-layer MM-ENMs. Conversely, placing an intermediate hydrophilic layer between two hydrophobic layers in triple-layered MM-ENMs promoted water condensation (water pocket formation) and thus reduced DCMD performance. Over 10 h DCMD, the best-performing dual-layered MM-ENM allowed ultra-high permeate fluxes of up to 74.7 kg/m2 h while maintaining a stable permeate electrical conductivity of around 7.63 μS/cm and a salt (NaCl) rejection factor of up to 99.995% when operated with a feed temperature of 80°C, a permeate temperature of 20°C, and a feed solution containing NaCl at a concentration of 30 g/L.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Naturresursteknik -- Energisystem (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Engineering -- Energy Systems (hsv//eng)
Keyword
- Dual-layered membranes
- Electrospinning
- Electrospun nanofiber
- Nanofillers protrusions
- Triple-layered membranes
Publication and Content Type
- ref (subject category)
- art (subject category)
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