Frictional Electrification on Polymeric Flat Surfaces

Abstract

The electrostatic charge on nylon, polypropylene (PP), and polytetrafluoroethylene (PTFE) after rubbing against stainless steel and against each other was examined using a newly developed rubbing device with automated features. It is observed that the charge generated on PTFE and PP increases as the contact force increases, while the charge generated on nylon is not affected by the contact force. It is also found that the charge generated on PTFE and nylon due to friction is more than that due to repeated contacts and separations, however, this difference was not observed on PP. Furthermore, the charge generated on these three polymers is not affected by the rubbing speed at the levels of 27, 47, 95 mm/min. In addition, the triboelectric series of these three polymers and stainless steel is investigated by rubbing against each other.

Evidence for weakly bound electrons in non-irradiated alkane crystals: The electrons as a probe of structural differences in crystals

“…Our consideration is based on the hypothesis that the electrons mentioned here are produced in the triboelectrification process. 5 This work extends the results presented in the aforementioned paper. Here, we give further evidence for the presence of these electrons and try to define the electron traps with the use of some experimental techniques.…”

Temperature dependence of nylon and PTFE triboelectrification

“…Tribocharging has been shown to be sensitive to a wide variety of conditions, including the ambient environment conditions [18][19][20], impact velocity [21], material strain [22], the contact force [23], and the microscopic details of the surface contact [24,25]. Previous work has reduced these effects by making highly controlled, precision measurements of the impact charging of a small particle [16,[26][27][28], or by using single-crystal materials that are flat to nanometer precision [29,30].…”

Surface Chemistry and Humidity in Powder Electrostatics: A Comparative Study between Tribocharging and Corona Discharge

“…38 This seems to be in agreement with the common triboelectric series that ranks amine-containing nylon above stainless steel, which means that it charges positively in contact with the stainless steel surface. 39,40 The order of the triboelectric series can usually be predicted based on the work functions of conductive materials associated with the Fermi levels of the electrons. However, if insulators are involved in contact charging, their order in the triboelectric series tends to be determined based on the theoretically calculated apparent work function for an insulator and confirmed experimentally.…”