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POLYPYRROLE-COATED CARBON NANOTUBE-ARRAYS THE MISSING LINK BETWEEN BUCKY-PAPER ACTUATION AND CNT-ARRAY ACTUATION

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/
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:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Geier, Sebastiansebastian.geier (at) dlr.dehttps://orcid.org/0000-0001-7941-3630
Mahrholz, Thorstenthorsten.mahrholz (at) dlr.deUNSPECIFIED
Wierach, Peterpeter.wierach (at) dlr.deUNSPECIFIED
Sinapius, MichaelMichael.Sinapius (at) dlr.deUNSPECIFIED
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:
EditorsEmailEditor's ORCID iD
Loh, KenUniversity of California, San DiegoUNSPECIFIED
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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