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    A novel sensing technique for measurement of magnitude and polarity of electrostatic charge distribution across individual particles.

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    Authors
    Hussain, Tariq
    Kaialy, Waseem
    Deng, Tong
    Bradley, Mike S A
    Nokhodchi, Ali
    Armour-Chélu, David
    Issue Date
    2013-01-30
    
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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.
    Citation
    A novel sensing technique for measurement of magnitude and polarity of electrostatic charge distribution across individual particles. 2013, 441 (1-2):781-9 Int J Pharm
    Publisher
    Elsevier
    Journal
    International journal of pharmaceutics
    URI
    http://hdl.handle.net/2436/575937
    DOI
    10.1016/j.ijpharm.2012.10.002
    PubMed ID
    23064131
    Type
    Journal article
    Language
    en
    ISSN
    1873-3476
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.ijpharm.2012.10.002
    Scopus Count
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    Research Institute in Healthcare Science

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