Abstract
Flow electrification at polymer surfaces has long been studied; yet, its mechanism is still not fully understood. In the current research, we experimentally investigated the surface electric potentials of polycarbonate and polyethylene terephthalate exposed to electrolyte solutions of various anion sizes. The surface potential was always negative, and its magnitude decreased as the anion became larger. Other important factors include the ion concentration and the flow rate. These results help precisely control the polymer charging process, important for electret processing, energy harvesting, biosensing, among others.
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