Publisher DOI: 10.1016/j.memsci.2018.03.013
Title: Flux-enhanced PVDF mixed matrix membranes incorporating APTS-functionalized graphene oxide for membrane distillation
Language: English
Authors: 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 
Keywords: Air gap membrane distillation; Graphene oxide; Mixed matrix membranes; Sea water desalination
Issue Date: 15-May-2018
Source: Journal of Membrane Science 554: 309-323 (2018-05-15)
Abstract (english): 
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
ISSN: 0376-7388
Journal: Journal of membrane science 
Document Type: Article
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