Molecular engineering of high-performance nanofiltration membranes from intrinsically microporous poly(ether-ether-ketone)
AuthorsAbdulhamid, Mahmoud A.
Ng, Kim Choon
KAUST DepartmentAdvanced Membranes and Porous Materials Research Center
Biological and Environmental Sciences and Engineering (BESE) Division
Chemical Engineering Program
Computational Physics and Materials Science (CPMS)
Environmental Science and Engineering Program
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
Water Desalination and Reuse Research Center (WDRC)
Permanent link to this recordhttp://hdl.handle.net/10754/665456
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AbstractPoly(ether-ether-ketone) has received increased attention due to its high thermal and chemical stability, and high performance in various applications. However, it suffers from semi-crystalline morphology, low fractional free volume, and poor processability, requiring the use of harsh acidic solvents, which leads to undesired sulfonation. In this work, three intrinsically microporous poly(ether-ether-ketone) (iPEEK), incorporating spirobisindane, Tröger’s base, and triptycene contorted structures, were developed for organic solvent nanofiltration. Molecular dynamics simulations have assisted the molecular engineering of the polymers and the understanding of the improved membrane performance through the binding energies between solvents and polymers. Application of the design principles of polymers of intrinsic microporosity has led to a paradigm shift with a notable enhancement in both the polymer properties and the subsequently fabricated nanofiltration membranes’ performance. The iPEEKs showed excellent solution processability, high surface area of 205–250 m2 g-1, and excellent thermal stability. Mechanically flexible nanofiltration membranes were prepared from N-methyl-2-pyrrolidone dope solution at iPEEK concentrations of 19–35 wt%. The molecular weight cutoff of the membranes was fine-tuned in the range of 450–845 g mol-1 displaying 2–6 fold higher permeance (3.57–11.09 L m-2 h-1 bar-1) than previous reports. The long-term stabilities were demonstrated by a 7-day continuous cross-flow filtration.
CitationAbdulhamid, M. A., Park, S.-H., Vovusha, H., Akhtar, F. H., Ng, K. C., Schwingenschlogl, U., & Szekely, G. (2020). Molecular engineering of high-performance nanofiltration membranes from intrinsically microporous poly(ether-ether-ketone). Journal of Materials Chemistry A. doi:10.1039/d0ta08194a
SponsorsThe graphical abstract and Fig. 1 were created by Heno Hwang, scientific illustrator at King Abdullah University of Science and Technology (KAUST). The postdoctoral fellowship from the Advanced Membranes and Porous Materials Center at KAUST is gratefully acknowledged (MAH, SHP, HV, FHA). This work was supported by funding from KAUST.
PublisherRoyal Society of Chemistry
JournalJournal of Materials Chemistry A
CollectionsArticles; Biological and Environmental Sciences and Engineering (BESE) Division; Advanced Membranes and Porous Materials Research Center; Environmental Science and Engineering Program; Physical Science and Engineering (PSE) Division; Chemical Engineering Program; Material Science and Engineering Program; Computational Physics and Materials Science (CPMS); Water Desalination and Reuse Research Center (WDRC)
Except where otherwise noted, this item's license is described as This article is Open Access. Archived with thanks to Journal of Materials Chemistry A.