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A CO2-gated anodic aluminum oxide based nanocomposite membrane for de-emulsification

Huang, X.; Mutlu, H.; Theato, P.

Abstract:
A carbon-dioxide-responsive organic–inorganic nanocomposite membrane based on a through-hole anodic aluminum oxide (AAO) template was constructed. The composite was prepared via a surface-initiated reversible addition–fragmentation chain-transfer (SI-RAFT) polymerization strategy to achieve the grafting of poly(methyl methacrylate-co-2-(diethylamino)ethyl methacrylate) brushes on the AAO membrane. The grafted polymer chain length could be controlled based on the feed ratio between the free chain transfer agent (CTA) and reactive monomer, e.g., methyl methacrylate and 2-(diethylamino)ethyl methacrylate, resulting in a membrane that features adjustable water permeability. Importantly, the membrane pore size and surface wettability could be switched from hydrophobic to hydrophilic upon the introduction of carbon dioxide and nitrogen gases. This allowed for the nanocomposite membrane to be utilized for controlled water flux and oil/water emulsion separation. The simple fabrication methodology as well as sustainable gaseous stimulus will be useful for the construction of future smart membranes.

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Verlagsausgabe §
DOI: 10.5445/IR/1000126492
Veröffentlicht am 22.11.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Biologische Grenzflächen (IBG)
Institut für Technische Chemie und Polymerchemie (ITCP)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 11.2020
Sprache Englisch
Identifikator ISSN: 2040-3364, 2040-3372
KITopen-ID: 1000126492
HGF-Programm 47.02.03 (POF III, LK 01) Zellpopul.auf Biofunk.Oberflächen IBG-3
Erschienen in Nanoscale
Band 12
Heft 41
Seiten 21316-21324
Vorab online veröffentlicht am 28.09.2020
Nachgewiesen in Web of Science
Scopus
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