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Composite Polymeric Membranes with Directionally Embedded Fibers for Controlled Dual Actuation

Titelangaben

Liu, Li ; Bakhshi, Hadi ; Jiang, Shaohua ; Schmalz, Holger ; Agarwal, Seema:
Composite Polymeric Membranes with Directionally Embedded Fibers for Controlled Dual Actuation.
In: Macromolecular Rapid Communications. Bd. 39 (2018) Heft 10 . - Eintrag 1800082.
ISSN 1521-3927
DOI: https://doi.org/10.1002/marc.201800082

Abstract

In this paper, preparation method and actuation properties of an innovative composite membrane composed of thermo‐ and pH‐responsive poly(N‐isopropylacrylamide‐co‐acrylic acid) fibers (average diameter ≈ 905 nm) embedded within a passive thermoplastic polyurethane (TPU) matrix at different angles with degree of alignment as high as 98% are presented. The composite membrane has a gradient of TPU along the thickness. It has the capability of temperature‐ and pH‐dependent direction‐, and size‐controlled actuation in few minutes. The stresses generated at the responsive fiber and nonresponsive matrix provide actuation, whereas the angle at which fibers are embedded in the matrix controls the actuation direction and size. The temperature has no effect on actuation and actuated forms at pH 7 and above, whereas the size of the actuated forms can be controlled by the temperature at lower pH. The membranes are strong enough to reversibly lift and release ≈426 times weight of their own mass (2.47 g metal ring is lifted by a 5.8 mg membrane). Soft actuators are of interest as smart scaffolds, robotics, catalysis, drug release, energy storage, electrodes, and metamaterials.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Lehrstuhl Makromolekulare Chemie II
Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 540 Chemie
Eingestellt am: 14 Aug 2018 12:08
Letzte Änderung: 14 Aug 2018 12:08
URI: https://eref.uni-bayreuth.de/id/eprint/45465