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Tribo‐Charging of Polymer Particles: Modeling, Experiments, and Optimal Parameters
Summary
This study investigated the triboelectric charging behavior of polymer particles (PA, PP, PU, ABS) in a multi-cavity rotating charger, developing force and collision models to optimize charge-to-mass differences. Results found tilt angle had the greatest influence on charging, supporting the development of electrostatic separation techniques for mixed plastic waste sorting.
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.