Bipolar Tribocharging Signal During Friction Force Fluctuations At Metal-insulator Interfaces.


Autoria(s): Burgo, Thiago A L; Erdemir, Ali
Contribuinte(s)

UNIVERSIDADE DE ESTADUAL DE CAMPINAS

Data(s)

01/11/2014

27/11/2015

27/11/2015

Resumo

Friction and triboelectrification of materials show a strong correlation during sliding contacts. Friction force fluctuations are always accompanied by two tribocharging events at metal-insulator [e.g., polytetrafluoroethylene (PTFE)] interfaces: injection of charged species from the metal into PTFE followed by the flow of charges from PTFE to the metal surface. Adhesion maps that were obtained by atomic force microscopy (AFM) show that the region of contact increases the pull-off force from 10 to 150 nN, reflecting on a resilient electrostatic adhesion between PTFE and the metallic surface. The reported results suggest that friction and triboelectrification have a common origin that must be associated with the occurrence of strong electrostatic interactions at the interface.

53

12101-5

Identificador

Angewandte Chemie (international Ed. In English). v. 53, n. 45, p. 12101-5, 2014-Nov.

1521-3773

10.1002/anie.201406541

http://www.ncbi.nlm.nih.gov/pubmed/25168573

http://repositorio.unicamp.br/jspui/handle/REPOSIP/201669

25168573

Idioma(s)

eng

Relação

Angewandte Chemie (international Ed. In English)

Angew. Chem. Int. Ed. Engl.

Direitos

fechado

© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Fonte

PubMed

Palavras-Chave #Charge Transfer #Contact Electrification #Electrostatic Interactions #Friction #Surface Chemistry
Tipo

Artigo de periódico