Next Article in Journal
Exploring the Ability of Luminescent Metal Assemblies to Bind and Sense Anionic or Ionizable Analytes A Ru(phen)2bipy-Based Dizinc Complex for Bisphenol A (BPA) Recognition
Previous Article in Journal
Synthesis of Polyfluorinated Thia- and Oxathiacalixarenes Based on Perfluoro-m-xylene
Previous Article in Special Issue
Shape-Memory Polymeric Artificial Muscles: Mechanisms, Applications and Challenges
Due to scheduled maintenance work on our core network, there may be short service disruptions on this website between 16:00 and 16:30 CEST on September 25th.
Article

Actuating Shape Memory Polymer for Thermoresponsive Soft Robotic Gripper and Programmable Materials

1
Fraunhofer Institute for Applied Polymer Research IAP, Geiselbergstr. 69, 14476 Potsdam, Germany
2
Fraunhofer Institute for Mechanics of Materials IWM, Wöhlerstr. 11, 79108 Freiburg, Germany
3
Department of Microsystems Engineering IMTEK, University of Freiburg, Georges-Koehler-Allee 078, 79110 Freiburg, Germany
*
Author to whom correspondence should be addressed.
Academic Editors: Laura Peponi and Valentina Sessini
Molecules 2021, 26(3), 522; https://doi.org/10.3390/molecules26030522
Received: 2 December 2020 / Revised: 8 January 2021 / Accepted: 18 January 2021 / Published: 20 January 2021
(This article belongs to the Special Issue Advances in Shape Memory Polymers and Polymeric Nanocomposites)
For soft robotics and programmable metamaterials, novel approaches are required enabling the design of highly integrated thermoresponsive actuating systems. In the concept presented here, the necessary functional component was obtained by polymer syntheses. First, poly(1,10-decylene adipate) diol (PDA) with a number average molecular weight Mn of 3290 g·mol−1 was synthesized from 1,10-decanediol and adipic acid. Afterward, the PDA was brought to reaction with 4,4′-diphenylmethane diisocyanate and 1,4-butanediol. The resulting polyester urethane (PEU) was processed to the filament, and samples were additively manufactured by fused-filament fabrication. After thermomechanical treatment, the PEU reliably actuated under stress-free conditions by expanding on cooling and shrinking on heating with a maximum thermoreversible strain of 16.1%. Actuation stabilized at 12.2%, as verified in a measurement comprising 100 heating-cooling cycles. By adding an actuator element to a gripper system, a hen’s egg could be picked up, safely transported and deposited. Finally, one actuator element each was built into two types of unit cells for programmable materials, thus enabling the design of temperature-dependent behavior. The approaches are expected to open up new opportunities, e.g., in the fields of soft robotics and shape morphing. View Full-Text
Keywords: additive manufacturing; soft robotics; actuation; programmable materials; polyester urethane; shape morphing; unit cell additive manufacturing; soft robotics; actuation; programmable materials; polyester urethane; shape morphing; unit cell
Show Figures

Graphical abstract

MDPI and ACS Style

Schönfeld, D.; Chalissery, D.; Wenz, F.; Specht, M.; Eberl, C.; Pretsch, T. Actuating Shape Memory Polymer for Thermoresponsive Soft Robotic Gripper and Programmable Materials. Molecules 2021, 26, 522. https://doi.org/10.3390/molecules26030522

AMA Style

Schönfeld D, Chalissery D, Wenz F, Specht M, Eberl C, Pretsch T. Actuating Shape Memory Polymer for Thermoresponsive Soft Robotic Gripper and Programmable Materials. Molecules. 2021; 26(3):522. https://doi.org/10.3390/molecules26030522

Chicago/Turabian Style

Schönfeld, Dennis, Dilip Chalissery, Franziska Wenz, Marius Specht, Chris Eberl, and Thorsten Pretsch. 2021. "Actuating Shape Memory Polymer for Thermoresponsive Soft Robotic Gripper and Programmable Materials" Molecules 26, no. 3: 522. https://doi.org/10.3390/molecules26030522

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop