Influence of humidity on tribo-electric charging and segregation in shaken granular media.
dc.contributor.author | Schella, André | |
dc.contributor.author | Herminghaus, Stephan | |
dc.contributor.author | Schröter, Matthias | |
dc.date.accessioned | 2020-02-18T21:52:17Z | |
dc.date.available | 2020-02-18T21:52:17Z | |
dc.date.issued | 2017-01 | |
dc.date.updated | 2020-02-18T21:52:16Z | |
dc.description.abstract | We study the effect of humidity on the charge accumulation of polymer granulates shaken vertically in a stainless steel container. This setup allows us to control the humidity level from 5% to 100%RH while performing automated charge measurements in a Faraday cup directly connected to the shaking container. We find that samples of approximately 2000 polymer spheres become highly charged at low humidity levels (<30%RH), but acquire almost no charge for humidity levels above 80%RH. The transition between these two regimes does depend on the material, as does the sign of the charge. For the latter we find a correlation with the contact angle of the polymer with only very hydrophilic particles attaining positive charges. We show that this humidity dependence of tribo-charging can be used to control segregation in shaken binary mixtures. | |
dc.identifier.issn | 1744-683X | |
dc.identifier.issn | 1744-6848 | |
dc.identifier.uri | ||
dc.language | eng | |
dc.publisher | Royal Society of Chemistry (RSC) | |
dc.relation.ispartof | Soft matter | |
dc.relation.isversionof | 10.1039/c6sm02041k | |
dc.subject | Science & Technology | |
dc.subject | Physical Sciences | |
dc.subject | Technology | |
dc.subject | Chemistry, Physical | |
dc.subject | Materials Science, Multidisciplinary | |
dc.subject | Physics, Multidisciplinary | |
dc.subject | Polymer Science | |
dc.subject | Chemistry | |
dc.subject | Materials Science | |
dc.subject | Physics | |
dc.subject | CONTACT ELECTRIFICATION | |
dc.subject | TRIBOELECTRIC SERIES | |
dc.subject | ELECTROSTATIC DISCHARGE | |
dc.subject | SURFACE MODIFICATION | |
dc.subject | FORCE MICROSCOPY | |
dc.subject | SOLID-SURFACES | |
dc.subject | WATER | |
dc.subject | POLYMERS | |
dc.subject | SEPARATION | |
dc.subject | INTERFACES | |
dc.title | Influence of humidity on tribo-electric charging and segregation in shaken granular media. | |
dc.type | Journal article | |
duke.contributor.orcid | Schroter, Matthias|0000-0002-8332-5585 | |
pubs.begin-page | 394 | |
pubs.end-page | 401 | |
pubs.issue | 2 | |
pubs.organisational-group | Trinity College of Arts & Sciences | |
pubs.organisational-group | Duke | |
pubs.publication-status | Published | |
pubs.volume | 13 |