Electrostatic charging at the solid–liquid interface: Strategies for liquid flow sensing

• DOI: 10.26599/frict.2025.9440892
• Publication Date: 2024-12-06T06:37:28Z
• Authors: Yan Araujo Santos...; Kelly Schneider M...; Ezequiel Lorenzett; Thiago Augusto Li...
• Keywords: Electrostatic induction; SIGNAL (programming language); Faraday cage; Electric charge

A particular kind of triboelectrification is found during the flow liquids through tubes. Here, we have used Faraday cups and Kelvin probes to investigate charge aqueous solutions alcohols flowing a polytetrafluorethylene tube. An excess positive charges was observed in all collected by cup after flow. While tube displays small potential flow, likely due electrokinetic effects, very high negative completion Aqueous with pH variation showed significant differences accumulation only at 2.93 4.99, while most can be suppressed using common surfactants. Alcohols displayed an inverse relationship between carbon chain length, except for methanol. Thus, graphite-based nanocomposites as non-contact induction electrodes near sensing. proof concept conducted these differentiate water ethanol inside tube, repeated thousands times. Finally, output voltage signal from electrode processed input filter microcontroller where four LEDs were incorporated indicate type liquid.