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  4. Flux-enhanced PVDF mixed matrix membranes incorporating APTS-functionalized graphene oxide for membrane distillation
 
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Flux-enhanced PVDF mixed matrix membranes incorporating APTS-functionalized graphene oxide for membrane distillation

Publikationstyp
Journal Article
Date Issued
2018-05-15
Sprache
English
Author(s)
Leaper, Sebastian  
Abdel-Karim, Ahmed  
Faki, Bilal  
Luque-Alled, Jose Miguel  
Alberto, Monica  
Vijayaraghavan, Aravind  
Holmes, Stuart M.  
Szekely, Gyorgy  
Badawy, Mohamed I.  
Shokri, Nima  
Gorgojo, Patricia  
TORE-URI
http://hdl.handle.net/11420/9448
Journal
Journal of membrane science  
Volume
554
Start Page
309
End Page
323
Citation
Journal of Membrane Science 554: 309-323 (2018-05-15)
Publisher DOI
10.1016/j.memsci.2018.03.013
Scopus ID
2-s2.0-85043754965
Air gap membrane distillation (AGMD) is an emerging desalination technology with the potential to meet the challenge of global water scarcity due to its low cost and high thermal efficiency compared to other processes. However, despite the potential of AGMD, a lack of appropriate membranes limits its commercial application. Therefore, this study was focussed on the fabrication of high flux, robust membranes for the purification of artificial sea water by incorporating graphene oxide functionalized with 3-(aminopropyl)triethoxysilane (APTS) into PVDF polymer solutions. Successful functionalisation of GO with APTS was confirmed with XPS and FTIR. It was shown that the addition of GO and GO-APTS enhanced the permeate flux by 52% and 86%, respectively, compared to pure PVDF. The best performing membrane contained 0.3 wt% GO-APTS (with respect to PVDF) and had a flux of 6.2 LMH (L m h ) whilst maintaining perfect salt rejection (>99.9%). These improvements were attributed to increased surface and bulk porosity, larger mean pore size and hydrophilic interactions owing to the functional groups of GO and GO-APTS. These membranes are evidence of the potential that GO and related materials have as nanocomposite fillers in high performance desalination membranes. −2 −1
Subjects
Air gap membrane distillation
Graphene oxide
Mixed matrix membranes
Sea water desalination
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