Geier, Sebastian and Mahrholz, Thorsten and Wierach, Peter and Sinapius, Michael (2017) POLYPYRROLE-COATED CARBON NANOTUBE-ARRAYS THE MISSING LINK BETWEEN BUCKY-PAPER ACTUATION AND CNT-ARRAY ACTUATION. In: Proceedings of the ASME 2017 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. SMASIS 2017, 18-20.09.2017, Snowbird, Utha, USA.
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Abstract
The actuation mechanisms of cnt-based materials are still controversially discussed. It is not common sense whether it is a macroscopic volume effect caused by ion intercalation or electrostatic repulsion of equally charged cnts or a nanoscopic effect of filled anti-bonding orbitals of the carbon atom or interactions with ions docking on the carbon surface. In the presented paper arrays of highly aligned multi-walled carbon nanotubes (mwcnts) are used which are stabilized by a polypyrrole-coating. The samples are tested along the cnt-orientation and in perpendicu- lar mode to analyze the influence of the structure-ion interaction. The mwcnt-arrays exhibit only a total length of approximately 2.8 mm but by coating with polypyrrole larger geometries can be tested. The actuation is analyzed using an in-plane test and an actuated tensile testing. Free strain can be detected using the first set-up the second method is carried out to evaluate the mechanical stability of the samples. As might be expected, the material shows a strong anisotropic active behavior with the actuation along the tube axis being only one third of the value detected at the perpendicular oriented samples. The findings point out that an intercalation of ions into the charged cnt-architecture seems here to be the dominating mechanism.
Item URL in elib: | https://elib.dlr.de/113024/ | |||||||||||||||
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Document Type: | Conference or Workshop Item (Speech) | |||||||||||||||
Title: | POLYPYRROLE-COATED CARBON NANOTUBE-ARRAYS THE MISSING LINK BETWEEN BUCKY-PAPER ACTUATION AND CNT-ARRAY ACTUATION | |||||||||||||||
Authors: |
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Date: | September 2017 | |||||||||||||||
Journal or Publication Title: | Proceedings of the ASME 2017 Conference on Smart Materials, Adaptive Structures and Intelligent Systems | |||||||||||||||
Refereed publication: | Yes | |||||||||||||||
Open Access: | Yes | |||||||||||||||
Gold Open Access: | No | |||||||||||||||
In SCOPUS: | No | |||||||||||||||
In ISI Web of Science: | No | |||||||||||||||
Editors: |
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Status: | Accepted | |||||||||||||||
Keywords: | Carbon Nanotubes, actuation, free strain, polyphyrrole, hybrid actuators, actuation mechanism | |||||||||||||||
Event Title: | SMASIS 2017 | |||||||||||||||
Event Location: | Snowbird, Utha, USA | |||||||||||||||
Event Type: | international Conference | |||||||||||||||
Event Dates: | 18-20.09.2017 | |||||||||||||||
Organizer: | American Society of Mechanical Engineering | |||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | |||||||||||||||
HGF - Program: | Aeronautics | |||||||||||||||
HGF - Program Themes: | fixed-wing aircraft | |||||||||||||||
DLR - Research area: | Aeronautics | |||||||||||||||
DLR - Program: | L AR - Aircraft Research | |||||||||||||||
DLR - Research theme (Project): | L - Structures and Materials (old) | |||||||||||||||
Location: | Braunschweig | |||||||||||||||
Institutes and Institutions: | Institute of Composite Structures and Adaptive Systems > Multifunctional Materials | |||||||||||||||
Deposited By: | Geier, Sebastian | |||||||||||||||
Deposited On: | 14 Aug 2017 08:22 | |||||||||||||||
Last Modified: | 23 Feb 2019 00:21 |
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