Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/67196
Type: Artigo de periódico
Title: Friction coefficient dependence on electrostatic tribocharging
Author: Burgo, TAL
Silva, CA
Balestrin, LBS
Galembeck, F
Abstract: Friction between dielectric surfaces produces patterns of fixed, stable electric charges that in turn contribute electrostatic components to surface interactions between the contacting solids. The literature presents a wealth of information on the electronic contributions to friction in metals and semiconductors but the effect of triboelectricity on friction coefficients of dielectrics is as yet poorly defined and understood. In this work, friction coefficients were measured on tribocharged polytetrafluoroethylene (PTFE), using three different techniques. As a result, friction coefficients at the macro- and nanoscales increase many-fold when PTFE surfaces are tribocharged, but this effect is eliminated by silanization of glass spheres rolling on PTFE. In conclusion, tribocharging may supersede all other contributions to macro- and nanoscale friction coefficients in PTFE and probably in other insulating polymers.
Country: Inglaterra
Editor: Nature Publishing Group
Rights: aberto
Identifier DOI: 10.1038/srep02384
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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