2012
DOI: 10.1002/ange.201107256
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Strain‐Induced Reversal of Charge Transfer in Contact Electrification

Abstract: Wird eine schlaffe Ballonhaut (entspannter Zustand) an Teflon gerieben, so lädt sich die Teflonoberfläche positiv auf; nach dem Aufblasen lädt derselbe Ballon (nun im gespannten Zustand) die Teflonoberfläche dagegen negativ auf. Dieses Ergebnis zeigt, dass die mechanische Spannung eines Materials sein Verhalten in der Kontaktelektrifizierung beeinflussen und die Triebkraft für bestimmte (noch unbekannte) Ladungstransferspezies verändern kann.

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Cited by 14 publications
(8 citation statements)
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References 27 publications
(25 reference statements)
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“…However, we can see that when the mechanical strain is increased, the contributions from these dipoles (1 kHz) decrease dramatically (indicated by the transition from zone D to zone C in Figure a). Sow et al demonstrated that mechanical strain can change the magnitude or even the direction of charge transfer between surfaces. Additionally, the MWS polarization is highly dependent on the morphology of the filler network which is also modified by the application of strain .…”
Section: Results and Discussionmentioning
confidence: 99%
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“…However, we can see that when the mechanical strain is increased, the contributions from these dipoles (1 kHz) decrease dramatically (indicated by the transition from zone D to zone C in Figure a). Sow et al demonstrated that mechanical strain can change the magnitude or even the direction of charge transfer between surfaces. Additionally, the MWS polarization is highly dependent on the morphology of the filler network which is also modified by the application of strain .…”
Section: Results and Discussionmentioning
confidence: 99%
“…Such interphase polymer is found to be highly dependent on the filler size and dispersion which clearly varies from case to case. ,, Third, charge transfer between filler–polymer interfaces can generate surface dipoles and form an electrical double layer. ,, This charge transfer or charge distribution may come from the differences in the degree of alignment of Fermi levels of the components but highly depends on the type of contact . Moreover this behavior becomes rather complex as recently it has been shown to also depend on mechanical strain . Fourthly, charges (space charges) will gather on the interface when the current density varies from one phase to another phase.…”
Section: Introductionmentioning
confidence: 99%
“…Similar to friction, macroscopic charging will be a statistical average over local charge mosaics . It has also been shown that macroscopic deformations play an important role in triboelectricity (first in 1910 when bending was found to dictate the direction of charge transfer with further work over the next century ). Until recently there has been no model to explain the link between such deformations and triboelectricity based upon ab initio quantum mechanics.…”
mentioning
confidence: 99%
“…[4] Zuerst wurden Teflonkügelchen etwa eine Minute lang in einer Polystyrolschale gerollt. [6] Im Allgemeinen weisen Materialien uncharakterisierte nanoskalige mechanische Spannungen auf, die von ihrer Wärme-und Verarbeitungsgeschichte abhängen und die die Kontaktbeladung in unbekannter Weise beeinflussen kçnnen. Dies wird tatsächlich festgestellt.…”
unclassified
“…In unseren eigenen Untersuchungen zeigten wir vor Kurzem, dass mechanische Spannung eines Materials die Richtung der Ladungsübertragung umkehren kann. [6] Im Allgemeinen weisen Materialien uncharakterisierte nanoskalige mechanische Spannungen auf, die von ihrer Wärme-und Verarbeitungsgeschichte abhängen und die die Kontaktbeladung in unbekannter Weise beeinflussen kçnnen.…”
unclassified