TY - JOUR
T1 - Porous polymeric membranes with thermal and solvent resistance
AU - Pulido, Bruno
AU - Waldron, Christopher
AU - Zolotukhin, M.G.
AU - Nunes, Suzana Pereira
N1 - KAUST Repository Item: Exported on 2021-02-10
Acknowledgements: This work was sponsored by King Abdullah University of Science and Technology (KAUST).
PY - 2017/5/30
Y1 - 2017/5/30
N2 - Polymeric membranes are highly advantageous over their ceramic counterparts in terms of the simplicity of the manufacturing process, cost and scalability. Their main disadvantages are low stability at temperatures above 200 °C, and in organic solvents. We report for the first time porous polymeric membranes manufactured from poly(oxindolebiphenylylene) (POXI), a polymer with thermal stability as high as 500 °C in oxidative conditions. The membranes were prepared by solution casting and phase inversion by immersion in water. The asymmetric porous morphology was characterized by scanning electronic microscopy. The pristine membranes are stable in alcohols, acetone, acetonitrile and hexane, as well as in aqueous solutions with pH between 0 and 14. The membrane stability was extended for application in other organic solvents by crosslinking, using various dibromides, and the efficiency of the different crosslinkers was evaluated by thermogravimetric analysis (TGA) and X-ray photoelectron spectroscopy (XPS). POXI crosslinked membranes are stable up to 329 °C in oxidative conditions and showed organic solvent resistance in polar aprotic solvents with 99% rejection of Red Direct 80 in DMF at 70 °C. With this development, the application of polymeric membranes could be extended to high temperature and harsh environments, fields currently dominated by ceramic membranes.
AB - Polymeric membranes are highly advantageous over their ceramic counterparts in terms of the simplicity of the manufacturing process, cost and scalability. Their main disadvantages are low stability at temperatures above 200 °C, and in organic solvents. We report for the first time porous polymeric membranes manufactured from poly(oxindolebiphenylylene) (POXI), a polymer with thermal stability as high as 500 °C in oxidative conditions. The membranes were prepared by solution casting and phase inversion by immersion in water. The asymmetric porous morphology was characterized by scanning electronic microscopy. The pristine membranes are stable in alcohols, acetone, acetonitrile and hexane, as well as in aqueous solutions with pH between 0 and 14. The membrane stability was extended for application in other organic solvents by crosslinking, using various dibromides, and the efficiency of the different crosslinkers was evaluated by thermogravimetric analysis (TGA) and X-ray photoelectron spectroscopy (XPS). POXI crosslinked membranes are stable up to 329 °C in oxidative conditions and showed organic solvent resistance in polar aprotic solvents with 99% rejection of Red Direct 80 in DMF at 70 °C. With this development, the application of polymeric membranes could be extended to high temperature and harsh environments, fields currently dominated by ceramic membranes.
UR - http://hdl.handle.net/10754/623770
UR - https://authors.elsevier.com/a/1VBX-1LgHNOEax
UR - http://www.scopus.com/inward/record.url?scp=85020630596&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2017.05.070
DO - 10.1016/j.memsci.2017.05.070
M3 - Article
AN - SCOPUS:85020630596
SN - 0376-7388
VL - 539
SP - 187
EP - 196
JO - Journal of Membrane Science
JF - Journal of Membrane Science
ER -