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Carbon Nanotube Strain Measurements via Tensile Testing

Geier, Sebastian und Mahrholz, Thorsten und Wierach, Peter und Sinapius, Michael (2014) Carbon Nanotube Strain Measurements via Tensile Testing. In: ASME 2014 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2014 (7572). ASME. ASME 2014 Conference on Smart Materials, Adaptive Structures & Intelligent Systems SMASIS2014, 2014-09-08 - 2014-09-10, Newport, Rhode Island, USA. doi: 10.1115/SMASIS2014-7572.

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Kurzfassung

Discovering and characterizing new smart materials is an urgent need to close the performance-gaps of standard active materials. Still there is a need for a material of high modulus, low density and large strain. Carbon materials catch scientific attention since a while but one sort among these is of special interest, carbon nanotubes (CNTs). Beside excellent material properties another interesting feature was first mentioned 1999 - the active behavior of paper-like mats made of CNTs. The CNT-papers are electrical activated using a double-layer interaction of ions provided by an electrolyte and the charged high surface area of the paper formed by carbon tubes. Until now the mechanism behind the strain generation of CNT-based architectures is unknown but the it is of high interest. The origin of the mechanism reveals the active potential of carbon tubes to be or not to be a resilient smart material in order to use the strong carbon bonds instead of weak van der Waals force as linking between the tubes. This paper presents further investigations about the mechanical composition of CNT-papers as well as vertical aligned CNT-arrays using an actuated tensile test set-up. For better comparison the experiments are conducted in dry, wet and wet/charged conditions. Especially in the case of the CNT-arrays it is essential to preload the specimens because their curly CNT-structure superimposes the vertical orientation of the arrays. While the CNT-paper is tested in an one molar sodium chloride solution, the hydrophilic character of CNT-arrays requires an ionic liquid (IL). It is found that the mechanical properties of CNT-papers drop significantly by wetting and further more by charging what indicates an electro-static dominated effect. In contrast the CNT-arrays show similar results independent of their test-conditions and an active, reversible behavior of tube-elongation by charging. These results indicate strongly a quantum-mechanical effect of the single tubes.

elib-URL des Eintrags:https://elib.dlr.de/89363/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Carbon Nanotube Strain Measurements via Tensile Testing
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Geier, SebastianSebastian.Geier (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Mahrholz, Thorstenthorsten.mahrholz (at) dlr.dehttps://orcid.org/0000-0003-1488-0910146850010
Wierach, PeterPeter.Wierach (at) dlr.dehttps://orcid.org/0000-0003-0852-9112144716998
Sinapius, MichaelTU-BS IAFNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:8 September 2014
Erschienen in:ASME 2014 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2014
Referierte Publikation:Nein
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Nein
DOI:10.1115/SMASIS2014-7572
Verlag:ASME
Name der Reihe:Development and Characterization of Multifunctional Materials
Status:veröffentlicht
Stichwörter:Carbon nanotubes; Carbon nanotube-arrays; Actuator; Activation-mechanism; Kohlenstoffröhre´; Kohlenstoffröhrenarray; elektro-mechanischer Wandler; Aktuationseffekt;
Veranstaltungstitel:ASME 2014 Conference on Smart Materials, Adaptive Structures & Intelligent Systems SMASIS2014
Veranstaltungsort:Newport, Rhode Island, USA
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:8 September 2014
Veranstaltungsende:10 September 2014
Veranstalter :American Society of American Engineering ASME
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Starrflügler (alt)
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Starrflüglerforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Strukturen & Werkstoffe (alt)
Standort: Braunschweig
Institute & Einrichtungen:Institut für Faserverbundleichtbau und Adaptronik > Multifunktionswerkstoffe
Hinterlegt von: Geier, Sebastian
Hinterlegt am:11 Jun 2014 18:16
Letzte Änderung:24 Apr 2024 19:55

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