Adsorption-assisted transport of water vapour in super-hydrophobic membranes filled with multilayer graphene platelets
| Autor: | Emilia Gontarek, Enrico Drioli, Marek Lieder, Lidietta Giorno, Francesca Militano, Francesca Macedonio, Annarosa Gugliuzza, Antonio Politano |
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| Rok vydání: | 2019 |
| Předmět: |
Nanocomposite
Materials science Graphene Graphene platelets Membrane distillation 02 engineering and technology Microporous material super-hydrophobic membranes 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention Water desalination Adsorption Membrane Chemical engineering law General Materials Science 2D Materials Wetting 0210 nano-technology Polarization (electrochemistry) |
| Zdroj: | Nanoscale 11 (2019): 11521–11529. doi:10.1039/c9nr02581b info:cnr-pdr/source/autori:Gontarek E; Macedonio F; Militano F; Giorno L; Lieder M; Politano A; Drioli E; Gugliuzza A/titolo:Adsorption-assisted transport of water vapour in superhydrophobic membranes filled with multilayer graphene platelets/doi:10.1039%2Fc9nr02581b/rivista:Nanoscale (Print)/anno:2019/pagina_da:11521/pagina_a:11529/intervallo_pagine:11521–11529/volume:11 |
| ISSN: | 2040-3372 2040-3364 |
| Popis: | The effects of confinement of multilayer graphene platelets in hydrophobic microporous polymeric membranes are here examined. Intermolecular interactions between water vapour molecules and nanocomposite membranes are envisaged to originate assisted transport of water vapour in membrane distillation processes when a suitable filler-polymer ratio is reached. Mass transport coefficients are estimated under different working conditions, suggesting a strong dependence of the transport on molecular interactions. Remarkably, no thermal polarization is observed, although the filler exhibits ultrahigh thermal conductivity. In contrast, enhanced resistance to wetting as well as outstanding mechanical and chemical stability meets the basic requirements of water purification via membrane distillation. As a result, a significant improvement of the productivity-efficiency trade-off is achieved with respect to the pristine polymeric membrane when low amounts of platelets are confined in spherulitic-like PVDF networks. |
| Databáze: | OpenAIRE |
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