Polymer-Ti<inf>3</inf>C<inf>2</inf>T<inf>x</inf> composite membranes to overcome the trade-off in solvent resistant nanofiltration for alcohol-based system
|dc.identifier.citation||Wu, X. and Hao, L. and Zhang, J. and Zhang, X. and Wang, J. and Liu, J. 2016. Polymer-Ti<inf>3</inf>C<inf>2</inf>T<inf>x</inf> composite membranes to overcome the trade-off in solvent resistant nanofiltration for alcohol-based system. Journal of Membrane Science. 515: pp. 175-188.|
© 2016 Elsevier B.V. Solvent resistant nanofiltration (SRNF) technology is an energy efficient and environmentally friendly alternative to purify alcohol-based mixtures, but there exists a challenge in overcoming the trade-off between membrane flux and rejection. Herein, as the representative of the emerging family of MXenes, Ti3C2Tx nanosheets with abundant -OH groups are chosen as nanofillers to prepare SRNF composite membrane after being incorporated into two typical polymer matrixes: hydrophilic polyethyleneimine (PEI) and hydrophobic polydimethylsiloxane (PDMS). Systematic characterizations and measurements suggest that the uniformly dispersed Ti3C2Tx nanosheets enhance the thermal/mechanical stabilities and solvent resistance for both polymer-based membranes through steric effects and/or interfacial interactions. Besides, the horizontally-lied Ti3C2Tx nanosheets give significant promotion on the transfer of alcohol molecules by providing additional pathways along nanosheet surface using -OH as adsorption site. Particularly, they afford improvements of alcohol flux as high as 30% to PEI-based membrane and 162% to PDMS-based membrane. Meanwhile, the rejection abilities are dramatically improved with MWCOs below 200 Da due to the blockage of solute transfer by the nanosheets. These results indicate that the trade-off between alcohol flux and solute rejection is readily overcome. The transfer properties of weak- or non-polar solvents and the long-term operation stability of membranes are also explored.
|dc.title||Polymer-Ti<inf>3</inf>C<inf>2</inf>T<inf>x</inf> composite membranes to overcome the trade-off in solvent resistant nanofiltration for alcohol-based system|
|dcterms.source.title||Journal of Membrane Science|
|curtin.department||WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)|
|curtin.accessStatus||Fulltext not available|
Files in this item
There are no files associated with this item.