Quantitative Measurement of Tribo-electric Charging Phenomena of Dielectric Materials

摘要

In this paper we discuss a new electrostatic charge imaging instrument, based around a 16 element array of novel, ultra high impedance electric field sensors, developed and patented at the University of Sussex. We report measurements taken on samples of Mylar, Kapton and PTFE sheet and demonstrate the imaging of the spatial charge distribution on these sheets which occurs as a result of tribo-charging, by an earthed lead and by a human finger. These measurements are compared with several published tribo-electric series, and by comparing our measurements taken on various samples and thicknesses of material, we show that it is possible to make quantitative measurements of tribo-electric charge density and therefore to establish a quantitative tribo-electric series in this way.