A1 Journal article (refereed), original research

Design and Performance Evaluation of Hybrid Nanofiltration Membranes Based on Multiwalled Carbon Nanotubes and Polyelectrolyte Multilayers for Larger Ion
Rejection and Separation


Publication Details
Authors: Irigoyen Joseba, Laakso Timo, Politakos Nikolaos, Dahne Lars, Pihlajamäki Arto, Mänttäri Mika, Moya Sergio Enrique
Publication year: 2016
Language: English
Related Journal or Series Information: Macromolecular Chemistry and Physics
Volume number: 217
Issue number: 6
Start page: 804
End page: 811
JUFO-Level of this publication: 1
Open Access: Not an Open Access publication

Abstract
A polyelectrolyte multilayer (PEM) membrane of poly(diallyldimethylammonium chloride)(PDADMAC) and poly(sodium 4-styrenesulfonate) (PSS) is deposited on top of a thick-layer micrometer range of multiwalled carbon nanotubes (MWCNTs) assembled on a porous siliconcarbide (SiC) tubular membrane support. MWCNTs are assembled “layer-by-layer” alternating oxidized CNTs and poly(allylamine hydrochloride)-modified CNTs. The MWCNTs layer is crosslinked by annealing after the assembly. The MWCNT layer acts as a spacer between the PDADMAC/PSS PEM and the SiC support. The MWCNT support increases water permeability in 42% compared with the PEMs deposited without MWCNTs. Hybrid MWCNT–PEM membranes show high rejection for divalent ions, which increases directlywith flux. A rejection up to 92% is measured for MgSO4 and there is up to a 60% rejection difference between MgCl2 and NaCl, making the hybrid MWCNT–PEMs highly appealing for nanofi ltration and monovalent and divalent ion separations.

Last updated on 2018-19-10 at 08:49