Hussain, Tariq, Kaialy, Waseem, Deng, Tong ORCID: https://orcid.org/0000-0003-4117-4317, Bradley, Mike S.A., Nokhodchi, Ali and Armour-Chélu, David (2012) Measurement of electrostatic charge on particles using a novel approach. International Journal of Pharmaceutics, 441 (1-2). pp. 781-789. ISSN 0378-5173 (doi:10.1016/j.ijpharm.2012.10.002)

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Abstract

Electrostatic charge is generated during powder handling due to particle–particle and particle–wall collisions, rubbing, sliding, and rolling. In case of bipolar charge generation, the electrostatic forces may significantly change the inner forces and increase powder adhesion and cause a serious problem in material handling process. Therefore, the knowledge of distribution of charge across the individual particles is helpful to identify the role of triboelectrification and the effects of various relevant variables especially change in the contact materials, environmental conditions during processing, etc. A novel approach based on inductive sensor has been developed to detect the either polarity of charged particle and to characterise the bipolar charge distribution in the population of particulate material. To achieve this, an amplification unit configured as a pure integrator and signal processing techniques has been used to de-noise and correct the baseline of signal and MATLAB algorithm developed for peak detection. The polarity of charged particles obtained by this method is calibrated with Faraday pail method and the results are promising. Experimental study has been carried out by using two distinct populations of oppositely charged particles (glass beads-PVC, olivine sand, and silica sand). The obtained results indicate that the method is able to detect the distribution of polarities of charged particles.

Item Type:	Article
Additional Information:	[1] School of Engineering, University of Greenwich is acknowledged for providing the funds. Waseem Kaialy thanks University of Damascus for providing Ph.D. scholarship.
Uncontrolled Keywords:	electrostatic charge, powder, blending, inductive sensor, bipolar charge, particulate material
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science Faculty of Engineering & Science > School of Engineering (ENG)
Last Modified:	23 Sep 2019 11:15
URI:	http://gala.gre.ac.uk/id/eprint/9400

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