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Composite Polymeric Membranes with Directionally Embedded Fibers for Controlled Dual Actuation

Title data

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. Vol. 39 (2018) Issue 10 . - Eintrag 1800082.
ISSN 1521-3927
DOI: https://doi.org/10.1002/marc.201800082

Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 14 Aug 2018 12:08
Last Modified: 14 Aug 2018 12:08
URI: https://eref.uni-bayreuth.de/id/eprint/45465