- search hit 1 of 1
Shape memory nanocomposite fibers for untethered high-energy microengines
- Classic rotating engines are powerful and broadly used but are of complex design and difficult to miniaturize. It has long remained challenging to make large-stroke, high-speed, high-energy microengines that are simple and robust. We show that torsionally stiffened shape memory nanocomposite fibers can be transformed upon insertion of twist to store and provide fast and high-energy rotations. The twisted shape memory nanocomposite fibers combine high torque with large angles of rotation, delivering a gravimetric work capacity that is 60 times higher than that of natural skeletal muscles. The temperature that triggers fiber rotation can be tuned. This temperature memory effect provides an additional advantage over conventional engines by allowing for the tunability of the operation temperature and a stepwise release of stored energy.
Author details: | Jinkai YuanORCiD, Wilfrid NeriORCiD, Cecile ZakriORCiD, Pascal MerzeauORCiD, Karl KratzORCiD, Andreas LendleinORCiDGND, Philippe PoulinORCiD |
---|---|
DOI: | https://doi.org/10.1126/science.aaw3722 |
ISSN: | 0036-8075 |
ISSN: | 1095-9203 |
Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/31296766 |
Title of parent work (English): | Science |
Publisher: | American Assoc. for the Advancement of Science |
Place of publishing: | Washington |
Publication type: | Article |
Language: | English |
Date of first publication: | 2019/07/12 |
Publication year: | 2019 |
Release date: | 2021/01/07 |
Volume: | 365 |
Issue: | 6449 |
Number of pages: | 39 |
First page: | 155 |
Last Page: | 158 |
Funding institution: | Helmholtz AssociationHelmholtz Association |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |
DDC classification: | 5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften |
Peer review: | Referiert |
License (German): | CC-BY - Namensnennung 4.0 International |