Tribo‐Charging of Polymer Particles: Modeling, Experiments, and Optimal Parameters

ABSTRACT Based on the developed multi‐cavity rotating charger, an investigation into the triboelectric charging of PA, PP, PU, and ABS particles was conducted. First, the force and motion models of the particles were established. A collision model of particles inside the charger has been established, and the effects of rotational speed, tilt angle, and inner cavity diameter on the triboelectric collision of particles have been explored. Second, the triboelectric charging experiments of polymers were carried out using the developed multi‐cavity rotating charger. Single‐factor and orthogonal experiments revealed that factors influencing on charge‐to‐mass difference as: tilt angle > inner cavity diameter > rotational speed. Finally, the optimal charging parameter combination for the four‐component polymer particles was determined through experiments. The research on particle charging provides theoretical and experimental support for their subsequent electrostatic separation.