10th International Aerosol Conference September 2 - September 7, 2018 America's Center Convention Complex St. Louis, Missouri, USA
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Investigation of Single Particle Frictional Electrification with Polymer Plate
JIAWEI HU, Cai Liang, Lunbo Duan, Xiaoping Chen, Daoyin Liu, Changsui Zhao, School of Energy and Environment, Southeast University
Abstract Number: 1296 Working Group: Aerosol Modeling
Abstract In Dry Power Inhalers, the small drug particulates are always highly charged due to continuously contact with the device and other particles. The accumulation of static charges on drug particles may lead to particle- device adhesion which significantly affects drug delivery, drug disposal, and dosage in DPIs. In order to explore the mechanism of electrostatic charging in DPIs, a simplifying approach by investigating the triboelectrification of a single particle sliding on a polymer plate has been conducted in this work. To obtain the accuracy triboelectric charge due to sliding, the initial charge on the particle before sliding and the final charge after the particle separate from the plate were measured with two Faraday Cups. The results indicated that the final charge of the particle was found to be linear with the initial charge for a short sliding distance, whereas the experimental data became scattered for a long sliding length. The influences of the sliding length and normal load on the triboelectric charge density were analyzed by considering the contact area. Furthermore, the triboelectric charge density was able to be fundamentally described as a function of the sliding contact area and the real contact area.