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Morphology- and Ion Size-Induced Actuation of Carbon Nanotube Architectures

Geier, Sebastian and Mahrholz, Thorsten and Wierach, Peter and Sinapius, Michael (2018) Morphology- and Ion Size-Induced Actuation of Carbon Nanotube Architectures. International Journal of Smart and Nano Materials, 9 (1). Taylor & Francis. DOI: 10.1080/19475411.2018.1457573 ISSN 1947-5411

Full text not available from this repository.

Abstract

Future adaptive applications require lightweight and stiff materials with high active strain but low energy consumption. A suitable combination of these properties is offered by carbon nanotube-based actuators. Papers made of carbon nanotubes (CNTs) are charged within an electrolyte, which results in an electrical field forming a double-layer of ions at their surfaces and a deflection of the papers can be detected. Until now, there is no generally accepted theory for the actuation mechanism. This study focuses on the actuation mechanism of CNT papers, which represent architectures of randomly oriented CNTs. The samples are tested electrochemically in an in-plane set-up to detect the free strain. The elastic modulus of the CNT papers is analyzed in a tensile test facility. The influence of various ion sizes of water-based electrolytes is investigated. During the tests, four parameters that have a significant influence on the mechanical performance of CNT papers were identified: the test conditions, the electrical charging, the microstructure and the ion size. All of these influencing factors Point to the mechanically weak inter-tube linking at which the actuation seems to take place. Quadratic voltage-strain correlation suggests a combination of electrostatic and volumetric effects as the possible reason for CNT paper actuation.

Item URL in elib:https://elib.dlr.de/119537/
Document Type:Article
Title:Morphology- and Ion Size-Induced Actuation of Carbon Nanotube Architectures
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Geier, SebastianSebastian.Geier (at) dlr.dehttps://orcid.org/0000-0001-7941-3630
Mahrholz, ThorstenThorsten.Mahrholz (at) dlr.dehttps://orcid.org/0000-0003-1488-0910
Wierach, PeterPeter.Wierach (at) dlr.deUNSPECIFIED
Sinapius, MichaelMichael.Sinapius (at) dlr.deUNSPECIFIED
Date:2018
Journal or Publication Title:International Journal of Smart and Nano Materials
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:No
Volume:9
DOI :10.1080/19475411.2018.1457573
Editors:
EditorsEmail
Benjeddou, Ayechayech.benjeddou@supmeca.fr
Leng, Jinsongijsnm@hit.edu.cn
Publisher:Taylor & Francis
ISSN:1947-5411
Status:Accepted
Keywords:Carbon nanotubes, actuation mechanism, ion-size, morphology, double-layer;
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
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Multifunctional Materials
Deposited By: Geier, Sebastian
Deposited On:07 May 2018 08:26
Last Modified:07 May 2018 08:26

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