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Type: Artigo de periódico
Title: Bipolar Tribocharging Signal During Friction Force Fluctuations At Metal-insulator Interfaces.
Author: Burgo, Thiago A L
Erdemir, Ali
Abstract: 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.
Subject: Charge Transfer
Contact Electrification
Electrostatic Interactions
Surface Chemistry
Citation: Angewandte Chemie (international Ed. In English). v. 53, n. 45, p. 12101-5, 2014-Nov.
Rights: fechado
Identifier DOI: 10.1002/anie.201406541
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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