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Fundamental investigations of Carbon Nanotubes working as actuators

Geier, Sebastian und Schnoor, Thea und Mahrholz, Thorsten und Riemenschneider, Johannes und Wierach, Peter und Sinapius, Michael und Schulte, Karl (2011) Fundamental investigations of Carbon Nanotubes working as actuators. SPIE Smart Structures/NDE, 07. - 10. April 2011, San Diego, USA.

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Kurzfassung

Excellent properties like low density, high mechanical stiffness as well as an outstanding thermal and electrical conductivity make researchers focusing on carbon nanotubes (CNTs) since years. Beside that it is found that structures made of CNTs can be actuated when they are set up like a capacitor. Usually two dimensional (2D) CNT-papers with ran-domly oriented CNTs, called Bucky-papers, are used. They are charged and divided by an electrically insulating but ionic conductible electrolyte. Experiments demonstrate low volt-ages for actuation ($\pm$1V). Although the mechanism of CNT-actuation is still an open issue theoretical studies suggest a charge and ion induced lengthening of the C-bonds, which predict theoretical strains up to 1$\%$. These characteristics make CNTs a poten-tial candidate for lightweight and powerful actuators of future adaptive aerospace applica-tions. The presented work gives an overview of possible CNT-actuator configurations. Compre-hensive analysis tools for 2D mats of randomly oriented CNTs have been developed to guarantee a consistent data base for the comparison of different CNT-configurations. It is focused on the electro-mechanical properties with respect to the processing and configu-ration of CNT-actuators. For a more efficient use of the mechanical advantages of the CNT-geometry a new align-ing manufacturing approach is presented, to get highly oriented 2D CNT-papers. Their properties are compared with randomly oriented CNT-papers. Finally a new test set-up will be introduced, which enables deflection measurements di-rectly on the top of vertically aligned CNTs (CNT-arrays). The build-up and necessary prework are shown, as well as results of the first experiments. The method of measuring along the axis of aligned CNTs qualifies this set-up to get a deeper understanding about the actuation mechanism of CNTs. Vertically aligned CNTs promise to be a more efficient actuator configuration because of their high stiffness in direction of actuation.

Dokumentart:Konferenzbeitrag (Vortrag, Paper)
Titel:Fundamental investigations of Carbon Nanotubes working as actuators
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Geier, SebastianNICHT SPEZIFIZIERT
Schnoor, TheaNICHT SPEZIFIZIERT
Mahrholz, ThorstenNICHT SPEZIFIZIERT
Riemenschneider, JohannesNICHT SPEZIFIZIERT
Wierach, PeterNICHT SPEZIFIZIERT
Sinapius, MichaelNICHT SPEZIFIZIERT
Schulte, KarlNICHT SPEZIFIZIERT
Datum:April 2011
Stichwörter:carbon nanotube, actuator, Bucky-paper, liquid electrolytes, solid electrolytes, actuation mecha-nism;
Veranstaltungstitel:SPIE Smart Structures/NDE
Veranstaltungsort:San Diego, USA
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:07. - 10. April 2011
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Luftfahrt
HGF - Programmthema:Starrflügler
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Starrflüglerforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Strukturen & Werkstoffe
Standort: Braunschweig
Institute & Einrichtungen:Institut für Faserverbundleichtbau und Adaptronik > Multifunktionswerkstoffe
Hinterlegt von: Isolde Böhringer-Thelen
Hinterlegt am:13 Jul 2011 12:32
Letzte Änderung:13 Jul 2011 12:32

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