Kurzbeschreibung (Abstract)
The design of artificially generated channels featuring distinct remote-switchable functionalities is of critical importance for separation, transport control, and water filtration applications. Here, we focus on the preparation of block copolymers (BCPs) consisting of polystyrene-block-poly(2-hydroxyethyl methacrylate) (PS-b-PHEMA) having molar masses in the range of 91 to 124 kg mol−1 with a PHEMA content of 13 to 21 mol %. The BCPs can be conveniently functionalized with redox-active ferrocene moieties by a postmodification protocol for the hydrophilic PHEMA segments. Up to 66 mol % of the hydroxyl functionalities can be efficiently modified with the reversibly redox-responsive units. For the first time, the ferrocene-containing BCPs are shown to form nanoporous integral asymmetric membranes by self-assembly and application of the non-solvent-induced phase separation (SNIPS) process. Open porous structures are evidenced by scanning electron microscopy (SEM) and water flux measurements, while efficient redox-switching capabilities are investigated after chemical oxidation of the ferrocene moieties. As a result, the porous membranes reveal a tremendously increased polarity after oxidation as reflected by contact angle measurements. Additionally, the initial water flux of the ferrocene-containing membranes decreased after oxidizing the ferrocene moieties because of oxidation-induced pore swelling of the membrane.
| Typ des Eintrags: |
Artikel
|
| Erschienen: |
2017 |
| Autor(en): |
Schöttner, Sebastian ; Hossain, Rimjhim ; Rüttiger, Christian ; Gallei, Markus |
| Art des Eintrags: |
Zweitveröffentlichung |
| Titel: |
Ferrocene-Modified Block Copolymers for the Preparation of Smart Porous Membranes |
| Sprache: |
Englisch |
| Publikationsjahr: |
2017 |
| Publikationsdatum der Erstveröffentlichung: |
2017 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: |
Polymers |
| Jahrgang/Volume einer Zeitschrift: |
9 |
| (Heft-)Nummer: |
10 |
| DOI: |
10.3390/polym9100491 |
| URL / URN: |
https://doi.org/10.3390/polym9100491 |
| Herkunft: |
Zweitveröffentlichung aus gefördertem Golden Open Access |
| Kurzbeschreibung (Abstract): |
The design of artificially generated channels featuring distinct remote-switchable functionalities is of critical importance for separation, transport control, and water filtration applications. Here, we focus on the preparation of block copolymers (BCPs) consisting of polystyrene-block-poly(2-hydroxyethyl methacrylate) (PS-b-PHEMA) having molar masses in the range of 91 to 124 kg mol−1 with a PHEMA content of 13 to 21 mol %. The BCPs can be conveniently functionalized with redox-active ferrocene moieties by a postmodification protocol for the hydrophilic PHEMA segments. Up to 66 mol % of the hydroxyl functionalities can be efficiently modified with the reversibly redox-responsive units. For the first time, the ferrocene-containing BCPs are shown to form nanoporous integral asymmetric membranes by self-assembly and application of the non-solvent-induced phase separation (SNIPS) process. Open porous structures are evidenced by scanning electron microscopy (SEM) and water flux measurements, while efficient redox-switching capabilities are investigated after chemical oxidation of the ferrocene moieties. As a result, the porous membranes reveal a tremendously increased polarity after oxidation as reflected by contact angle measurements. Additionally, the initial water flux of the ferrocene-containing membranes decreased after oxidizing the ferrocene moieties because of oxidation-induced pore swelling of the membrane. |
| Status: |
Verlagsversion |
| URN: |
urn:nbn:de:tuda-tuprints-68905 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): |
500 Naturwissenschaften und Mathematik > 540 Chemie |
| Fachbereich(e)/-gebiet(e): |
07 Fachbereich Chemie |
| Hinterlegungsdatum: |
22 Okt 2017 19:55 |
| Letzte Änderung: |
22 Okt 2017 19:55 |
| PPN: |
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| Export: |
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Ferrocene-Modified Block Copolymers for the Preparation of Smart Porous Membranes. (deposited 22 Okt 2017 19:55)
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