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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Electromechanical coupling in elastomers: a correlation between electrostatic potential and fatigue failure

Full text
Author(s):
Santos da Campo, Yan A. [1] ; Mehler, Dylan [2] ; Lorenzett, Ezequiel [2] ; Moreira, Kelly S. [2] ; Devens, Ana L. [2] ; dos Santos, Leandra P. [3] ; Galembeck, Fernando [3] ; Burgo, Thiago A. L. [1, 2]
Total Authors: 8
Affiliation:
[1] Univ Fed Santa Maria, Dept Chem, BR-97105900 Santa Maria, RS - Brazil
[2] Univ Fed Santa Maria, Dept Phys, BR-97105900 Santa Maria, RS - Brazil
[3] Univ Estadual Campinas, Inst Chem, BR-13083970 Campinas, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Physical Chemistry Chemical Physics; v. 23, n. 47 SEP 2021.
Web of Science Citations: 0
Abstract

The recent discovery of electromechanical coupling in elastomers showed periodic electrification in phase with rubber stretching but following different electrostatic potential patterns. In this work, a Kelvin electrode monitored silicone and natural rubber electrification for extended periods until the rubber tubing underwent rupture. The electric potential of the rubber follows regular, quasi-sinusoidal patterns at the beginning and during the whole run, except when close to rubber fatigue failure, changing into complex waveforms. The attractors on natural latex and silicone rubber become chaotic at roughly 50 seconds before rubber rupture when the nearby orbits diverge wildly. Thus, mechanical-to-electrical transduction in rubber alerts fatigue failure nearly one minute ahead of the breakdown. Moreover, electrostatic potential maps of stretched rubbers show the electrification of the rupture sites, evidencing the electrostatic contribution to the breakdown. These results show the convenient features of electromechanical coupling in rubbers for the non-contact, real-time prediction of the rubber fatigue failure, adding to the possibility of environmental energy harvesting. (AU)

FAPESP's process: 19/04565-9 - Conductive inks, adhesives and coatings made with exfoliated graphite, applied to making electrical components and circuits
Grantee:Leandra Pereira dos Santos
Support Opportunities: Scholarships in Brazil - Innovative Research in Small Business - PIPE
FAPESP's process: 09/54066-7 - Multi-User Laboratory for Advanced Optical Spectroscopy
Grantee:Yoshitaka Gushikem
Support Opportunities: Multi-user Equipment Program
FAPESP's process: 18/00834-2 - Conductive inks, adhesives and coatings made with exfoliated graphite, applied to making electrical components and circuits
Grantee:Fernando Galembeck
Support Opportunities: Research Grants - Innovative Research in Small Business - PIPE
FAPESP's process: 14/50906-9 - INCT 2014: in Functional Complex Materials
Grantee:Fernando Galembeck
Support Opportunities: Research Projects - Thematic Grants