Resistive characterization of soft conductive PDMS membranes for sensor applications

K. Cyril Baby; Ubaidul Fikri; Norbert Schwesinger

doi:10.1109/SAS.2016.7479870

Resistive characterization of soft conductive PDMS membranes for sensor applications

K. Cyril Baby, Ubaidul Fikri, Norbert Schwesinger

Not published at VTT

Technical University of Munich (TUM)

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

3 Citations (Scopus)

Abstract

Conductive PDMS is used as an active sensing element in many sensor applications. The resistive characterization of Carbon Black (CB) filled soft conductive PDMS (Poly-Di-Methyl-Sïloxane) membranes is reported in this paper. The conductive membranes are fabricated on a measurement template. A simple two point resistance measurement scheme, connected to the measurement template measures the surface resistivity of the fabricated membranes. As expected, the resistivity of the membranes decreases with increase in CB concentration. The surface resistivity of membranes fabricated using CB-PDMS composite and CB-Methanol-PDMS composite is compared. It is observed that dispersion of CB particle in methanol prior to the preparation of conductive PDMS has following advantages. 1) Low percolation threshold 2) Higher conductivity 3) Better surface profile. The CB filled conductive PDMS membranes show piezo resistivity. The resistance of the membranes increases with increased pressure. Higher values of piezo resistivity coefficients are observed at low CB concentration. The effect of the ambient temperature on the membrane resistance is also discussed. The conductive membranes show a Positive Temperature Coefficient (PTC) and the value of the coefficient increases with a decrease in concentration.

Original language	English
Title of host publication	IEEE Sensors Applications Symposium (SAS)
Publisher	IEEE Institute of Electrical and Electronic Engineers
Pages	344-349
ISBN (Electronic)	978-1-4799-7250-0, 978-1-4799-7249-4
DOIs	https://doi.org/10.1109/SAS.2016.7479870
Publication status	Published - 26 May 2016
MoE publication type	A4 Article in a conference publication
Event	11th IEEE Sensors Applications Symposium, SAS 2016 - Catania, Italy Duration: 20 Apr 2016 → 22 Apr 2016

Conference

Conference	11th IEEE Sensors Applications Symposium, SAS 2016
Country/Territory	Italy
City	Catania
Period	20/04/16 → 22/04/16

Keywords

carbon black fillers
conductive PDMS
percolation threshold
piezo resistivity
surface resistivity
thermal stability

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10.1109/SAS.2016.7479870

Cite this

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title = "Resistive characterization of soft conductive PDMS membranes for sensor applications",

abstract = "Conductive PDMS is used as an active sensing element in many sensor applications. The resistive characterization of Carbon Black (CB) filled soft conductive PDMS (Poly-Di-Methyl-S{\"i}loxane) membranes is reported in this paper. The conductive membranes are fabricated on a measurement template. A simple two point resistance measurement scheme, connected to the measurement template measures the surface resistivity of the fabricated membranes. As expected, the resistivity of the membranes decreases with increase in CB concentration. The surface resistivity of membranes fabricated using CB-PDMS composite and CB-Methanol-PDMS composite is compared. It is observed that dispersion of CB particle in methanol prior to the preparation of conductive PDMS has following advantages. 1) Low percolation threshold 2) Higher conductivity 3) Better surface profile. The CB filled conductive PDMS membranes show piezo resistivity. The resistance of the membranes increases with increased pressure. Higher values of piezo resistivity coefficients are observed at low CB concentration. The effect of the ambient temperature on the membrane resistance is also discussed. The conductive membranes show a Positive Temperature Coefficient (PTC) and the value of the coefficient increases with a decrease in concentration.",

keywords = "carbon black fillers, conductive PDMS, percolation threshold, piezo resistivity, surface resistivity, thermal stability",

author = "Baby, {K. Cyril} and Ubaidul Fikri and Norbert Schwesinger",

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year = "2016",

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doi = "10.1109/SAS.2016.7479870",

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Baby, KC, Fikri, U & Schwesinger, N 2016, Resistive characterization of soft conductive PDMS membranes for sensor applications. in IEEE Sensors Applications Symposium (SAS)., 7479870, IEEE Institute of Electrical and Electronic Engineers, pp. 344-349, 11th IEEE Sensors Applications Symposium, SAS 2016, Catania, Italy, 20/04/16. https://doi.org/10.1109/SAS.2016.7479870

Resistive characterization of soft conductive PDMS membranes for sensor applications. / Baby, K. Cyril; Fikri, Ubaidul; Schwesinger, Norbert.

IEEE Sensors Applications Symposium (SAS). IEEE Institute of Electrical and Electronic Engineers, 2016. p. 344-349 7479870.

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

T1 - Resistive characterization of soft conductive PDMS membranes for sensor applications

AU - Baby, K. Cyril

AU - Fikri, Ubaidul

AU - Schwesinger, Norbert

PY - 2016/5/26

Y1 - 2016/5/26

N2 - Conductive PDMS is used as an active sensing element in many sensor applications. The resistive characterization of Carbon Black (CB) filled soft conductive PDMS (Poly-Di-Methyl-Sïloxane) membranes is reported in this paper. The conductive membranes are fabricated on a measurement template. A simple two point resistance measurement scheme, connected to the measurement template measures the surface resistivity of the fabricated membranes. As expected, the resistivity of the membranes decreases with increase in CB concentration. The surface resistivity of membranes fabricated using CB-PDMS composite and CB-Methanol-PDMS composite is compared. It is observed that dispersion of CB particle in methanol prior to the preparation of conductive PDMS has following advantages. 1) Low percolation threshold 2) Higher conductivity 3) Better surface profile. The CB filled conductive PDMS membranes show piezo resistivity. The resistance of the membranes increases with increased pressure. Higher values of piezo resistivity coefficients are observed at low CB concentration. The effect of the ambient temperature on the membrane resistance is also discussed. The conductive membranes show a Positive Temperature Coefficient (PTC) and the value of the coefficient increases with a decrease in concentration.

AB - Conductive PDMS is used as an active sensing element in many sensor applications. The resistive characterization of Carbon Black (CB) filled soft conductive PDMS (Poly-Di-Methyl-Sïloxane) membranes is reported in this paper. The conductive membranes are fabricated on a measurement template. A simple two point resistance measurement scheme, connected to the measurement template measures the surface resistivity of the fabricated membranes. As expected, the resistivity of the membranes decreases with increase in CB concentration. The surface resistivity of membranes fabricated using CB-PDMS composite and CB-Methanol-PDMS composite is compared. It is observed that dispersion of CB particle in methanol prior to the preparation of conductive PDMS has following advantages. 1) Low percolation threshold 2) Higher conductivity 3) Better surface profile. The CB filled conductive PDMS membranes show piezo resistivity. The resistance of the membranes increases with increased pressure. Higher values of piezo resistivity coefficients are observed at low CB concentration. The effect of the ambient temperature on the membrane resistance is also discussed. The conductive membranes show a Positive Temperature Coefficient (PTC) and the value of the coefficient increases with a decrease in concentration.

KW - carbon black fillers

KW - conductive PDMS

KW - percolation threshold

KW - piezo resistivity

KW - surface resistivity

KW - thermal stability

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M3 - Conference article in proceedings

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EP - 349

BT - IEEE Sensors Applications Symposium (SAS)

PB - IEEE Institute of Electrical and Electronic Engineers

T2 - 11th IEEE Sensors Applications Symposium, SAS 2016

Y2 - 20 April 2016 through 22 April 2016

ER -

Resistive characterization of soft conductive PDMS membranes for sensor applications

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