Nanoporous Block Copolymer Membranes with Enhanced Solvent Resistance Via UV-Mediated Cross-Linking Strategies.

Autor: Frieß FV; Department of Chemistry, Saarland University, 66123, Saarbrücken, Germany.; Saarene, Saarland Center for Energy Materials and Sustainability, Campus C4 2, 66123, Saarbrücken, Germany., Hu Q; Institute of Physical Chemistry, University of Freiburg, Albertstraße 21, 79104, Freiburg, Germany.; Cluster of Excellence livMatS @ FIT-Freiburg Center for Interactive Materials and Bioinspired Technologies, University of Freiburg, Georges-Köhler-Allee 105, 79110, Freiburg, Germany., Mayer J; Ernst-Berl-Institute of Chemical Engineering and Macromolecular Chemistry, Technische Universität Darmstadt, Alarich-Weiss-Straße 4, 64287, Darmstadt, Germany., Gemmer L; Department of Chemistry, Saarland University, 66123, Saarbrücken, Germany.; Saarene, Saarland Center for Energy Materials and Sustainability, Campus C4 2, 66123, Saarbrücken, Germany., Presser V; Saarene, Saarland Center for Energy Materials and Sustainability, Campus C4 2, 66123, Saarbrücken, Germany.; Department of Materials Science and Engineering, Saarland University, Campus D2 2, 66123, Saarbrücken, Germany.; INM - Leibniz-Institute for New Materials, Campus D2 2, 66123, Saarbrücken, Germany., Balzer BN; Institute of Physical Chemistry, University of Freiburg, Albertstraße 21, 79104, Freiburg, Germany.; Cluster of Excellence livMatS @ FIT-Freiburg Center for Interactive Materials and Bioinspired Technologies, University of Freiburg, Georges-Köhler-Allee 105, 79110, Freiburg, Germany., Gallei M; Department of Chemistry, Saarland University, 66123, Saarbrücken, Germany.; Saarene, Saarland Center for Energy Materials and Sustainability, Campus C4 2, 66123, Saarbrücken, Germany.
Jazyk: angličtina
Zdroj: Macromolecular rapid communications [Macromol Rapid Commun] 2022 Feb; Vol. 43 (3), pp. e2100632. Date of Electronic Publication: 2021 Nov 17.
DOI: 10.1002/marc.202100632
Abstrakt: In this work, a block copolymer (BCP) consisting of poly((butyl methacrylate-co-benzophenone methacrylate-co-methyl methacrylate)-block-(2-hydroxyethyl methacrylate)) (P(BMA-co-BPMA-co-MMA)-b-P(HEMA)) is prepared by a two-step atom-transfer radical polymerization (ATRP) procedure. BCP membranes are fabricated applying the self-assembly and nonsolvent induced phase separation (SNIPS) process from a ternary solvent mixture of tetrahydrofuran (THF), 1,4-dioxane, and dimethylformamide (DMF). The presence of a porous top layer of the integral asymmetric membrane featuring pores of about 30 nm is confirmed via scanning electron microscopy (SEM). UV-mediated cross-linking protocols for the nanoporous membrane are adjusted to maintain the open and isoporous top layer. The swelling capability of the noncross-linked and cross-linked BCP membranes is investigated in water, water/ethanol mixture (1:1), and pure ethanol using atomic force microscopy, proving a stabilizing effect of the UV cross-linking on the porous structures. Finally, the influence of the herein described cross-linking protocols on water-flux measurements for the obtained membranes is explored. As a result, an increased swelling resistance for all tested solvents is found, leading to an increased water flux compared to the pristine membrane. The herein established UV-mediated cross-linking protocol is expected to pave the way to a new generation of porous and stabilized membranes within the fields of separation technologies.
(© 2021 The Authors. Macromolecular Rapid Communications published by Wiley-VCH GmbH.)
Databáze: MEDLINE
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