Characterization of carbon black filled PDMS-composite membranes for sensor applications

Cyril Baby Karuthedath, Ubaidul Fikri, Friederike Ruf, Norbert Schwesinger (Corresponding author)

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    12 Citations (Scopus)


    This paper describes the characterization of conductive PDMS (CPDMS) composites. Composite have been achieved by filling the PDMS with CarbonBlack (CB). Two different methods were used to prepare the CPDMS composites: (A) direct mixing of CB with PDMS (CBPDMS); (B) dissolving of CB in methanol before mixing with PDMS (CB-Methanol-PDMS). At a certain critical CB concentration, called percolation threshold, the membranes get conductive. Membranes of CPDMS (thickness ≈ 100μm) have been fabricated. CPDMS membranes of method (B) show a smoother surface profile as membranes of method (A). By means of a two-point resistivity measurement, the electrical resistance of CPDMS membranes was measured. With an increase of the CB concentration, the resistance decreases. Membranes of method (B) show a low percolation threshold and a low surface resistivity. Effects of pressure and temperature on the membrane resistance were investigated, too. Around the percolation threshold, the resistance shows the highest sensitivity on pressure and temperature variations. The Young's modulus of CPDMS membranes exponentially increase with an increase of the CB concentration.
    Original languageEnglish
    Title of host publicationInternational Symposium on Advanced Material Research - ISAMR 2017
    EditorsDong Keon Kim
    Place of PublicationZürich
    PublisherTrans Tech Publications Ltd
    ISBN (Print)978-3-03-573136-1
    Publication statusPublished - 2017
    MoE publication typeA4 Article in a conference publication
    EventInternational Symposium on Advanced Material Research, ISAMR 2017 - Seoul, Korea, Republic of
    Duration: 17 Mar 201719 Mar 2017

    Publication series

    SeriesKey Engineering Materials


    ConferenceInternational Symposium on Advanced Material Research, ISAMR 2017
    Country/TerritoryKorea, Republic of


    • Carbon black (CB)
    • Composites
    • Conductivity
    • PDMS
    • Percolation threshold
    • Surface resistance
    • Tensile test
    • Young's modulus


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