High-speed, helical and self-coiled dielectric polymer actuator
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
Novel actuator materials are necessary to advance the field of soft robotics. However, since current solutions are limited in terms of strain, strain rate, or robustness, a new actuator type was developed. In its basic configuration, this actuator consisted of four layers and self-coiled into a helix after pre-stretching. The actuator principle was a dielectric polymer actuator. Instead of an elastomer, a thin thermoplastic film, in this case polyethylene, was used as the dielectric and the typically low potential strain was amplified more than 40 times by the helical set-up. In a hot press, the thermoplastic film was joined together with layers of carbon black employed as electrodes and a highly elastic thermoplastic polyurethane film. Once the stack was laser cut into thin strips, they were then stretched over the polyethylene (PE) film’s limit of elasticity and released, thus forming a helix. The manufactured prototype showed a maximum strain of 2% while lifting six times its own weight at actuation frequencies of 3 Hz, which is equivalent to a strain rate of 12%/s. This shows the great potential of the newly developed actuator type. Nevertheless, materials, geometry as well as the manufacturing process are still subject to optimization.
Details
Original language | English |
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Article number | 15 |
Pages (from-to) | 1-10 |
Number of pages | 10 |
Journal | Actuators : open access journal |
Volume | 10 |
Issue number | 1 |
Publication status | Published - 2021 |
Peer-reviewed | Yes |
External IDs
Scopus | 85100186993 |
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ORCID | /0000-0001-7698-9095/work/142245210 |
ORCID | /0000-0003-1058-4030/work/142246435 |
Mendeley | fbdf420c-2bb4-3e9a-b1bb-1de1a3f3c08e |
Keywords
Keywords
- dielectric, polymer actuator, Artificial muscle, Self-sensing, Dielectric polymer actuator, Self-coiled actuator, Soft actuator