TY - JOUR
T1 - Negligible ageing in poly(ether-ether-ketone) membranes widens application range for solvent processing
AU - Burgal, João da Silva
AU - Peeva, Ludmila
AU - Livingston, Andrew
N1 - Funding Information:
This work was funded by the Novartis Pharma AG, Massachusetts Institute of Technology sub-award agreement No 5710002924 which is gratefully acknowledged. The authors would aso like to acknowledge EPSRC for the financial support under the project EP/J014974/1 entitled Molecular Builders: Constructing Nanoporous Materials.
Publisher Copyright:
© 2016
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2017
Y1 - 2017
N2 - Organic solvent nanofiltration membranes have been prepared from poly(ether-ether-ketone) (PEEK) by phase inversion. Remarkably, these membranes undergo negligible ageing, even under extreme conditions of high temperature air annealing, and high temperature solute filtration with aggressive solvents. This negligible ageing of PEEK membranes is contrasted with substantial ageing of crosslinked polybenzimidazole (PBI) and polyimide (PI) membranes. After air annealing at 120 °C, PBI and PI membranes become brittle and lose all permeance, whereas PEEK membranes remain flexible and retain a constant permeance of ~0.2 L h−1m−2bar−1for tetrahydrofuran (THF). The structural change in PBI and PI membranes is attributed to polymer transition from a non-equilibrium glassy state towards an equilibrium state at which chain packing precludes permeation of solvent. High temperature filtrations in DMF up to 140 °C for the three polymeric membranes showed PEEK performance to be stable and consistent with negligible ageing, whereas PBI and PI rapidly loose stability.
AB - Organic solvent nanofiltration membranes have been prepared from poly(ether-ether-ketone) (PEEK) by phase inversion. Remarkably, these membranes undergo negligible ageing, even under extreme conditions of high temperature air annealing, and high temperature solute filtration with aggressive solvents. This negligible ageing of PEEK membranes is contrasted with substantial ageing of crosslinked polybenzimidazole (PBI) and polyimide (PI) membranes. After air annealing at 120 °C, PBI and PI membranes become brittle and lose all permeance, whereas PEEK membranes remain flexible and retain a constant permeance of ~0.2 L h−1m−2bar−1for tetrahydrofuran (THF). The structural change in PBI and PI membranes is attributed to polymer transition from a non-equilibrium glassy state towards an equilibrium state at which chain packing precludes permeation of solvent. High temperature filtrations in DMF up to 140 °C for the three polymeric membranes showed PEEK performance to be stable and consistent with negligible ageing, whereas PBI and PI rapidly loose stability.
KW - Ageing
KW - High-temperature operation
KW - Organic solvent nanofiltration
KW - Poly(ether ether ketone)
UR - http://www.scopus.com/inward/record.url?scp=85027938627&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2016.10.015
DO - 10.1016/j.memsci.2016.10.015
M3 - Article
AN - SCOPUS:85027938627
SN - 0376-7388
VL - 525
SP - 48
EP - 56
JO - Journal of Membrane Science
JF - Journal of Membrane Science
ER -