Understanding the structure and performance of self-assembled triblock terpolymer membranes

Handle URI:
http://hdl.handle.net/10754/600131
Title:
Understanding the structure and performance of self-assembled triblock terpolymer membranes
Authors:
Pendergast, MaryTheresa M.; Mika Dorin, Rachel; Phillip, William A.; Wiesner, Ulrich; Hoek, Eric M.V.
Abstract:
Nanoporous membranes represent a possible route towards more precise particle and macromolecular separations, which are of interest across many industries. Here, we explored membranes with vertically-aligned nanopores formed from a poly(isoprene-. b-styrene-. b-4 vinyl pyridine) (ISV) triblock terpolymer via a hybrid self-assembly/nonsolvent induced phase separation process (S-NIPS). ISV concentration, solvent composition, and evaporation time in the S-NIPS process were varied to tailor ordering of the selective layer and produce enhanced water permeability. Here, water permeability was doubled over previous versions of ISV membranes. This was achieved by increasing volatile solvent concentration, thereby decreasing the evaporation period required for self-assembly. Fine-tuning was required, however, since overly-rapid evaporation did not yield the desired pore structure. Transport models, used to relate the in-. situ structure to the performance of these materials, revealed narrowing of pores and blocking by the dense region below. It was shown that these vertically aligned nanoporous membranes compare favorably with commercial ultrafiltration membranes formed by NIPS and track-etching processes, which suggests that there is practical value in further developing and optimizing these materials for specific industrial separations. © 2013 Elsevier B.V.
Citation:
Pendergast MM, Mika Dorin R, Phillip WA, Wiesner U, Hoek EMV (2013) Understanding the structure and performance of self-assembled triblock terpolymer membranes. Journal of Membrane Science 444: 461–468. Available: http://dx.doi.org/10.1016/j.memsci.2013.04.074.
Publisher:
Elsevier BV
Journal:
Journal of Membrane Science
KAUST Grant Number:
KUS-C1-018-02
Issue Date:
Oct-2013
DOI:
10.1016/j.memsci.2013.04.074
Type:
Article
ISSN:
0376-7388
Sponsors:
This publication is based on work supported in part by Award no. KUS-C1-018-02, made by the King Abdullah University of Science and Technology (KAUST). Additional financial support for MTMP and RMD was provided by the National Science Foundation Graduate Research Fellowship, Grant no. DGE-0707424. We acknowledge the use of the SPM facility at the Nano and Pico Characterization Laboratory at the California NanoSystems Institute, as well as the SEM facilities in the Molecular Instrumentation Center at the UCLA Chemistry Department and the Molecular and Nano Archaeology Laboratory at the UCLA Materials Science Department.
Appears in Collections:
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Full metadata record

DC FieldValue Language
dc.contributor.authorPendergast, MaryTheresa M.en
dc.contributor.authorMika Dorin, Rachelen
dc.contributor.authorPhillip, William A.en
dc.contributor.authorWiesner, Ulrichen
dc.contributor.authorHoek, Eric M.V.en
dc.date.accessioned2016-02-28T06:43:21Zen
dc.date.available2016-02-28T06:43:21Zen
dc.date.issued2013-10en
dc.identifier.citationPendergast MM, Mika Dorin R, Phillip WA, Wiesner U, Hoek EMV (2013) Understanding the structure and performance of self-assembled triblock terpolymer membranes. Journal of Membrane Science 444: 461–468. Available: http://dx.doi.org/10.1016/j.memsci.2013.04.074.en
dc.identifier.issn0376-7388en
dc.identifier.doi10.1016/j.memsci.2013.04.074en
dc.identifier.urihttp://hdl.handle.net/10754/600131en
dc.description.abstractNanoporous membranes represent a possible route towards more precise particle and macromolecular separations, which are of interest across many industries. Here, we explored membranes with vertically-aligned nanopores formed from a poly(isoprene-. b-styrene-. b-4 vinyl pyridine) (ISV) triblock terpolymer via a hybrid self-assembly/nonsolvent induced phase separation process (S-NIPS). ISV concentration, solvent composition, and evaporation time in the S-NIPS process were varied to tailor ordering of the selective layer and produce enhanced water permeability. Here, water permeability was doubled over previous versions of ISV membranes. This was achieved by increasing volatile solvent concentration, thereby decreasing the evaporation period required for self-assembly. Fine-tuning was required, however, since overly-rapid evaporation did not yield the desired pore structure. Transport models, used to relate the in-. situ structure to the performance of these materials, revealed narrowing of pores and blocking by the dense region below. It was shown that these vertically aligned nanoporous membranes compare favorably with commercial ultrafiltration membranes formed by NIPS and track-etching processes, which suggests that there is practical value in further developing and optimizing these materials for specific industrial separations. © 2013 Elsevier B.V.en
dc.description.sponsorshipThis publication is based on work supported in part by Award no. KUS-C1-018-02, made by the King Abdullah University of Science and Technology (KAUST). Additional financial support for MTMP and RMD was provided by the National Science Foundation Graduate Research Fellowship, Grant no. DGE-0707424. We acknowledge the use of the SPM facility at the Nano and Pico Characterization Laboratory at the California NanoSystems Institute, as well as the SEM facilities in the Molecular Instrumentation Center at the UCLA Chemistry Department and the Molecular and Nano Archaeology Laboratory at the UCLA Materials Science Department.en
dc.publisherElsevier BVen
dc.subjectBlock copolymeren
dc.subjectMembraneen
dc.subjectPhase separationen
dc.subjectSelf-assemblyen
dc.subjectUltrafiltrationen
dc.titleUnderstanding the structure and performance of self-assembled triblock terpolymer membranesen
dc.typeArticleen
dc.identifier.journalJournal of Membrane Scienceen
dc.contributor.institutionUniversity of California, Los Angeles, Los Angeles, United Statesen
dc.contributor.institutionCornell University, Ithaca, United Statesen
dc.contributor.institutionUniversity of Notre Dame, Notre Dame, United Statesen
kaust.grant.numberKUS-C1-018-02en
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