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Klein, Tobias ; Gruschwitz, Franka V. ; Kuchenbrod, Maren T. ; Nischang, Ivo ; Hoeppener, Stephanie ; Brendel, Johannes C.:
Adjusting the length of supramolecular polymer bottlebrushes by top-down approaches.
In: Beilstein Journal of Organic Chemistry.
Bd. 17
(2021)
.
- S. 2621-2628.
ISSN 1860-5397
DOI: https://doi.org/10.3762/bjoc.17.175
Abstract
Controlling the length of one-dimensional (1D) polymer nanostructures remains a key challenge on the way toward the applications of these structures. Here, we demonstrate that top-down processing facilitates a straightforward adjustment of the length of polyethylene oxide (PEO)-based supramolecular polymer bottlebrushes (SPBs) in aqueous solutions. These cylindrical structures self-assemble via directional hydrogen bonds formed by benzenetrisurea (BTU) or benzenetrispeptide (BTP) motifs located within the hydrophobic core of the fiber. A slow transition from different organic solvents to water leads first to the formation of µm-long fibers, which can subsequently be fragmented by ultrasonication or dual asymmetric centrifugation. The latter allows for a better adjustment of applied shear stresses, and thus enables access to differently sized fragments depending on time and rotation rate. Extended sonication and scission analysis further allowed an estimation of tensile strengths of around 16 MPa for both the BTU and BTP systems. In combination with the high kinetic stability of these SPBs, the applied top-down methods represent an easily implementable technique toward 1D polymer nanostructures with an adjustable length in the range of interest for perspective biomedical applications.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Keywords: | distribution; dual centrifugation; filomicelles; self-assembly; ultrasonication |
| Institutionen der Universität: | Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Lehrstuhl Makromolekulare Chemie I |
| Titel an der UBT entstanden: | Nein |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik > 540 Chemie |
| Eingestellt am: | 20 Feb 2024 12:10 |
| Letzte Änderung: | 20 Feb 2024 12:10 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/88590 |