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Novel Testing Method of Carbon Nanotube-Array Actuators

Geier, Sebastian und Mahrholz, Thorsten und Riemenschneider, Johannes und Wierach, Peter und Sinapius, Miachel (2011) Novel Testing Method of Carbon Nanotube-Array Actuators. NT11 12th International Conference on the Science and Application of Nanotubes, 10. - 17. Juli 2011, Cambridge, England.

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Mats of randomly oriented carbon nanotubes, known as Bucky papers, show in contact with an ionic electrolyte an active strain based on the capacitor-like mode of operation. The mats are manufactured by a filtration of an aqueous dispersion. The dispersion is made of commercially available CNT-powder. Various investigations show low reliability and reproducibility of powder-based structures because of the low powder-quality. Furthermore the random orientation of the papers does not allow using the excellent properties of a single CNT. That is the reason why great efforts are made to align the free movable CNTs in the dispersion. Other aligned CNT-based struc-tures like yarns or CNT-array-based papers suffer from low conductibility, low stiffness or bad a-lignment according to the manufacturing process. The mechanism of strain generation still remains undefined but there is a controversial discussion. Either it is a quantum-mechanical lengthening of C-bonds or an electrostatic repulsion between charged CNTs. Maybe it is a superposition of both mechanisms. The presented paper focuses on a method for measuring the free strain of as pro-duced vertically aligned CNT-arrays. This presented test set-up, the way of analysis and the used specimen avoid on the one hand measuring secondary effects and allow on the other hand re-cording the reaction of one MWCNT standing in parallel as an array. Therefore the analysed effect must be dominated by a quantum-mechanical character.

Dokumentart:Konferenzbeitrag (Vortrag, Paper, Poster)
Titel:Novel Testing Method of Carbon Nanotube-Array Actuators
AutorenInstitution oder E-Mail-Adresse der Autoren
Riemenschneider, JohannesNICHT SPEZIFIZIERT
Datum:Juli 2011
Stichwörter:CNT-arrays, CNT-actuators
Veranstaltungstitel:NT11 12th International Conference on the Science and Application of Nanotubes
Veranstaltungsort:Cambridge, England
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:10. - 17. Juli 2011
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:keine Zuordnung
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L - keine Zuordnung
DLR - Teilgebiet (Projekt, Vorhaben):L -- keine Zuordnung
Standort: Braunschweig
Institute & Einrichtungen:Institut für Faserverbundleichtbau und Adaptronik > Multifunktionswerkstoffe
Hinterlegt von: Isolde Böhringer-Thelen
Hinterlegt am:24 Jan 2012 15:30
Letzte Änderung:24 Jan 2012 15:30

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