A biocompatible pressure sensor based on styrene-isobutylene-styrene (sibs) and carbon black

B. Morales, M. Fittipaldi, A. Damley-Strnad, Landon R Grace

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The effect of carbon black (CB) loading percentage on the pressure-sensing capability of a thermoplastic elastomer (SIBS) composite was investigated. SIBS is well-known for its excellent biocompatibility and lack of foreign body reaction during in vivo use. As such, the goal of this effort is the exploitation of this characteristic to develop implantable and/or external (stick-to-skin) pressure sensors. This study represents an initial analysis of sensing performance as a function of carbon black content; a necessary step toward probing the interaction between the competing design goals of retained biocompatibility, suitable mechanical strength, flexibility, and sufficient carbon black content to meet or exceed the percolation threshold as required for sensor functionality. The SIBS/CB composites were manufactured through solution casting in toluene and a combination of high-shear mixing and ultrasonication. The dependence on carbon black content and optimum carbon loading for pressure sensing applications was determined for these composites by measuring the change in voltage (5V max) across the bulk film as a function of pressure via a custom Arduino/Matlab voltmeter. The highest sensitivity was recorded for samples with 20% CB by weight, which exhibited a voltage drop of 1.9 V at the maximum loading of 4861 Pa and a maximum rate of 0.380 mV/Pa. The optimum carbon black loading for maximum sensitivity, 20% by weight, is considerably higher than typical loadings intended to improve mechanical performance. Accordingly, design of pressure-sensing composites based on SIBS will likely require careful tradeoff studies specific to the requirements of each application. Fortunately, SIBS-based composites are uniquely suited to this type of application-specific tailoring due to the ability to adjust molecular weight, styrene content, and carbon black loading to achieve a wide range of material performance and functionality.

Original languageEnglish (US)
Title of host publicationProceedings of the American Society for Composites - 31st Technical Conference, ASC 2016
PublisherDEStech Publications Inc.
ISBN (Electronic)9781605953168
StatePublished - 2016
Event31st Annual Technical Conference of the American Society for Composites, ASC 2016 - Williamsburg, United States
Duration: Sep 19 2016Sep 21 2016

Other

Other31st Annual Technical Conference of the American Society for Composites, ASC 2016
CountryUnited States
CityWilliamsburg
Period9/19/169/21/16

Fingerprint

Soot
Styrene
Pressure sensors
Carbon black
Composite materials
Biocompatibility
Voltmeters
Thermoplastic elastomers
isobutylene
Toluene
Strength of materials
Skin
Casting
Carbon
Molecular weight
Sensors
Electric potential

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Morales, B., Fittipaldi, M., Damley-Strnad, A., & Grace, L. R. (2016). A biocompatible pressure sensor based on styrene-isobutylene-styrene (sibs) and carbon black. In Proceedings of the American Society for Composites - 31st Technical Conference, ASC 2016 DEStech Publications Inc..

A biocompatible pressure sensor based on styrene-isobutylene-styrene (sibs) and carbon black. / Morales, B.; Fittipaldi, M.; Damley-Strnad, A.; Grace, Landon R.

Proceedings of the American Society for Composites - 31st Technical Conference, ASC 2016. DEStech Publications Inc., 2016.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Morales, B, Fittipaldi, M, Damley-Strnad, A & Grace, LR 2016, A biocompatible pressure sensor based on styrene-isobutylene-styrene (sibs) and carbon black. in Proceedings of the American Society for Composites - 31st Technical Conference, ASC 2016. DEStech Publications Inc., 31st Annual Technical Conference of the American Society for Composites, ASC 2016, Williamsburg, United States, 9/19/16.
Morales B, Fittipaldi M, Damley-Strnad A, Grace LR. A biocompatible pressure sensor based on styrene-isobutylene-styrene (sibs) and carbon black. In Proceedings of the American Society for Composites - 31st Technical Conference, ASC 2016. DEStech Publications Inc. 2016
Morales, B. ; Fittipaldi, M. ; Damley-Strnad, A. ; Grace, Landon R. / A biocompatible pressure sensor based on styrene-isobutylene-styrene (sibs) and carbon black. Proceedings of the American Society for Composites - 31st Technical Conference, ASC 2016. DEStech Publications Inc., 2016.
@inproceedings{33883c38004d4a3bb0b139577b90b544,
title = "A biocompatible pressure sensor based on styrene-isobutylene-styrene (sibs) and carbon black",
abstract = "The effect of carbon black (CB) loading percentage on the pressure-sensing capability of a thermoplastic elastomer (SIBS) composite was investigated. SIBS is well-known for its excellent biocompatibility and lack of foreign body reaction during in vivo use. As such, the goal of this effort is the exploitation of this characteristic to develop implantable and/or external (stick-to-skin) pressure sensors. This study represents an initial analysis of sensing performance as a function of carbon black content; a necessary step toward probing the interaction between the competing design goals of retained biocompatibility, suitable mechanical strength, flexibility, and sufficient carbon black content to meet or exceed the percolation threshold as required for sensor functionality. The SIBS/CB composites were manufactured through solution casting in toluene and a combination of high-shear mixing and ultrasonication. The dependence on carbon black content and optimum carbon loading for pressure sensing applications was determined for these composites by measuring the change in voltage (5V max) across the bulk film as a function of pressure via a custom Arduino/Matlab voltmeter. The highest sensitivity was recorded for samples with 20{\%} CB by weight, which exhibited a voltage drop of 1.9 V at the maximum loading of 4861 Pa and a maximum rate of 0.380 mV/Pa. The optimum carbon black loading for maximum sensitivity, 20{\%} by weight, is considerably higher than typical loadings intended to improve mechanical performance. Accordingly, design of pressure-sensing composites based on SIBS will likely require careful tradeoff studies specific to the requirements of each application. Fortunately, SIBS-based composites are uniquely suited to this type of application-specific tailoring due to the ability to adjust molecular weight, styrene content, and carbon black loading to achieve a wide range of material performance and functionality.",
author = "B. Morales and M. Fittipaldi and A. Damley-Strnad and Grace, {Landon R}",
year = "2016",
language = "English (US)",
booktitle = "Proceedings of the American Society for Composites - 31st Technical Conference, ASC 2016",
publisher = "DEStech Publications Inc.",
address = "United States",

}

TY - GEN

T1 - A biocompatible pressure sensor based on styrene-isobutylene-styrene (sibs) and carbon black

AU - Morales, B.

AU - Fittipaldi, M.

AU - Damley-Strnad, A.

AU - Grace, Landon R

PY - 2016

Y1 - 2016

N2 - The effect of carbon black (CB) loading percentage on the pressure-sensing capability of a thermoplastic elastomer (SIBS) composite was investigated. SIBS is well-known for its excellent biocompatibility and lack of foreign body reaction during in vivo use. As such, the goal of this effort is the exploitation of this characteristic to develop implantable and/or external (stick-to-skin) pressure sensors. This study represents an initial analysis of sensing performance as a function of carbon black content; a necessary step toward probing the interaction between the competing design goals of retained biocompatibility, suitable mechanical strength, flexibility, and sufficient carbon black content to meet or exceed the percolation threshold as required for sensor functionality. The SIBS/CB composites were manufactured through solution casting in toluene and a combination of high-shear mixing and ultrasonication. The dependence on carbon black content and optimum carbon loading for pressure sensing applications was determined for these composites by measuring the change in voltage (5V max) across the bulk film as a function of pressure via a custom Arduino/Matlab voltmeter. The highest sensitivity was recorded for samples with 20% CB by weight, which exhibited a voltage drop of 1.9 V at the maximum loading of 4861 Pa and a maximum rate of 0.380 mV/Pa. The optimum carbon black loading for maximum sensitivity, 20% by weight, is considerably higher than typical loadings intended to improve mechanical performance. Accordingly, design of pressure-sensing composites based on SIBS will likely require careful tradeoff studies specific to the requirements of each application. Fortunately, SIBS-based composites are uniquely suited to this type of application-specific tailoring due to the ability to adjust molecular weight, styrene content, and carbon black loading to achieve a wide range of material performance and functionality.

AB - The effect of carbon black (CB) loading percentage on the pressure-sensing capability of a thermoplastic elastomer (SIBS) composite was investigated. SIBS is well-known for its excellent biocompatibility and lack of foreign body reaction during in vivo use. As such, the goal of this effort is the exploitation of this characteristic to develop implantable and/or external (stick-to-skin) pressure sensors. This study represents an initial analysis of sensing performance as a function of carbon black content; a necessary step toward probing the interaction between the competing design goals of retained biocompatibility, suitable mechanical strength, flexibility, and sufficient carbon black content to meet or exceed the percolation threshold as required for sensor functionality. The SIBS/CB composites were manufactured through solution casting in toluene and a combination of high-shear mixing and ultrasonication. The dependence on carbon black content and optimum carbon loading for pressure sensing applications was determined for these composites by measuring the change in voltage (5V max) across the bulk film as a function of pressure via a custom Arduino/Matlab voltmeter. The highest sensitivity was recorded for samples with 20% CB by weight, which exhibited a voltage drop of 1.9 V at the maximum loading of 4861 Pa and a maximum rate of 0.380 mV/Pa. The optimum carbon black loading for maximum sensitivity, 20% by weight, is considerably higher than typical loadings intended to improve mechanical performance. Accordingly, design of pressure-sensing composites based on SIBS will likely require careful tradeoff studies specific to the requirements of each application. Fortunately, SIBS-based composites are uniquely suited to this type of application-specific tailoring due to the ability to adjust molecular weight, styrene content, and carbon black loading to achieve a wide range of material performance and functionality.

UR - http://www.scopus.com/inward/record.url?scp=85013923125&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85013923125&partnerID=8YFLogxK

M3 - Conference contribution

BT - Proceedings of the American Society for Composites - 31st Technical Conference, ASC 2016

PB - DEStech Publications Inc.

ER -