Temperature Effect on Dissipation of Triboelectric Charge into Air from Textile Surfaces

Abstract

Triboelectric charges on textiles dissipate through a charge conduction mechanism and also by accompanying water molecules evaporating into air. The latter dissipation is less extensive than the former, but can be measured quantitatively under highly insulated experimental conditions. Rate constants of charge dissipation into the air at 20°C have been reported as a function of the ambient humidity and water content of fabrics. In this study, the rate constants are analyzed at temperatures above or below 20°C. Two kinds of water molecules, free and bound, are known to be present in the textile surface from charge dissipation analysis. Though free water is involved in atmospheric charge dissipation, the condition of water molecules in the fibers cannot be classified so simply. Rate constants of charge dissipation depend on the ambient absolute humidity and water content of sample fabrics for all the temperatures of these experiments.

Enhanced Power Output of a Triboelectric Nanogenerator using Poly(dimethylsiloxane) Modified with Graphene Oxide and Sodium Dodecyl Sulfate

“…Simultaneously, the positive charges on the PEN surface can induce free electrons in the ITO top layer to accumulate at the interface without tunneling through the PEN film. In the single-electrode operation mode, the ITO is not directly connected to the bottom Au electrode; this configuration provides electrostatic capacitive effect that can confine or keep positive surface charges to remain on the PEN surface during the separation stage; otherwise, some of the electrified charges can dissipate into the atmosphere due to water molecules in the air . When the two surfaces are brought back into contact again, the potential experienced by the free electrons in the bottom electrode decreases, and they thus flow back from the ground to neutralize the earlier positively charged Au electrode, producing a positive voltage signal.…”

Electrode Humidification Design for Artifact Reduction in Capacitive ECG Measurements

“…For hydrophobic insulator materials, the way of charge leakage includes electric conduction through the volume of the insulator and electric conduction through the surface of the insulator [27]. For hydrophilic textile materials, the way of charge leakage also includes the process of charge escape (charge escapes into the air through the free water evaporation path) [29,30]. Figure 1 is a schematic diagram of a charge decay model of a charged capacitive (non-contact) textile electrode, where Q 0 is the initial charge amount of the electrode, Q V (t) is the charge decay through volume conduction path, Q S (t) is the charge decay through surface conduction path, Q G (t) is the charge decay through gas ions neutralization path and Q F (t) is the charge decay through FWEP.…”

“…For hydrophobic insulator materials, the way of charge leakage includes electric conduction through the volume of the insulator and electric conduction through the surface of the insulator [ 27 ]. For hydrophilic textile materials, the way of charge leakage also includes the process of charge escape (charge escapes into the air through the free water evaporation path) [ 29 , 30 ].…”