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    The position of solid carbon dioxide in the triboelectric series

    79597.pdf (569.9Kb)
    Access Status
    Open access
    Authors
    Zhang, Jinyang
    Ciampi, Simone
    Date
    2019
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Zhang, J. and Ciampi, S. 2019. The position of solid carbon dioxide in the triboelectric series. Australian Journal of Chemistry. 72 (8): pp. 633-636.
    Source Title
    Australian Journal of Chemistry
    DOI
    10.1071/CH19239
    ISSN
    0004-9425
    Faculty
    Faculty of Science and Engineering
    School
    School of Molecular and Life Sciences (MLS)
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/DP190100735
    http://purl.org/au-research/grants/arc/DE160100732
    URI
    http://hdl.handle.net/20.500.11937/79497
    Collection
    • Curtin Research Publications
    Abstract

    © 2019 CSIRO.

    The process of releasing liquid carbon dioxide from a fire extinguisher is accompanied by a strong static charging of the plastic material making up the extinguisher discharge horn. Firefighters often report an electric shock when operating CO2 extinguishers, but the origin of this electrostatic hazard is largely unknown. Here, we begin to investigate this phenomenon, and test the hypothesis of plastic samples being tribocharged on contact with rapidly flowing solid CO2. Using Faraday pail measurements, we show that non-conductive polymers gain a net static charge when brought in and out of contact with dry ice (solid CO2). These measurements of charge sign and magnitude give indirect evidence helping to place solid CO2 for the first time on the triboelectric series. Polydimethylsiloxane (PDMS), polytetrafluoroethylene (PTFE), and polyvinyl chloride (PVC) samples acquire a negative charge when rubbed against dry ice, whereas poly(methyl methacrylate) (PMMA), glass, and nylon surfaces become positively charged. Therefore, we suggest the position of dry ice in the triboelectric series to be close to that of materials with stable cations and unstable anions, possibly locating it between PMMA and PVC.

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