Please use this identifier to cite or link to this item: doi:10.22028/D291-41159
Title: Thermo-Responsive Ultrafiltration Block Copolymer Membranes Based on Polystyrene-block-poly(diethyl acrylamide)
Author(s): Frieß, Florian V.
Hartmann, Frank
Gemmer, Lea
Pieschel, Jens
Niebuur, Bart‐Jan
Faust, Matthias
Kraus, Tobias
Presser, Volker
Gallei, Markus
Language: English
Title: Macromolecular Materials and Engineering
Volume: 308
Issue: 11
Publisher/Platform: Wiley
Year of Publication: 2023
Free key words: anionic polymerization
block copolymers
LCST polymers
stimuli-responsive polymers
DDC notations: 540 Chemistry
Publikation type: Journal Article
Abstract: Within the present work, a thermo-responsive ultrafiltration membrane ismanufactured based on a polystyrene-block-poly(diethyl acrylamide) blockcopolymer (BCP). The poly(diethyl acrylamide) block segment features a lowercritical solution temperature (LCST) in water, similar to the well-knownpoly(N-isopropylacrylamide), but having increased biocompatibility andwithout exhibiting a hysteresis of the thermally induced switching behavior.The BCP is synthesized via sequential “living” anionic polymerizationprotocols and analyzed by1H-NMR spectroscopy, size exclusionchromatography, and differential scanning calorimetry. The resultingmorphology in the bulk state is investigated by transmission electronmicroscopy (TEM) and small-angle X-ray scattering (SAXS) revealing theintended hexagonal cylindrical morphology. The BCPs form micelles in abinary mixture of tetrahydrofuran and dimethylformamide, where BCPcomposition and solvent affinities are discussed in light of the expectedstructure of these micelles and the resulting BCP membrane formation. Themembranes are manufactured using the non-solvent induced phaseseparation (NIPS) process and are characterized via scanning electronmicroscopy (SEM) and water permeation measurements. The latter arecarried out at room temperature and at 50°C revealing up to a 23-foldincrease of the permeance, when crossing the LCST of the poly(diethylacrylamide) block segment in water.
DOI of the first publication: 10.1002/mame.202300113
URL of the first publication:
Link to this record: urn:nbn:de:bsz:291--ds-411591
ISSN: 1439-2054
Date of registration: 31-Jan-2024
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Chemie
NT - Materialwissenschaft und Werkstofftechnik
Professorship: NT - Prof. Dr. Markus Gallei
NT - Prof. Dr. Tobias Kraus
NT - Prof. Dr. Volker Presser
Collections:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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