Electromechanical performance and membrane stability of novel ionic polymer transducers constructed in the presence of ionic liquids

Andrew J. Duncan, Donald J. Leo, Timothy Edward Long, Barbar J. Akle, Jong K. Park, Robert B. Moore

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

1 Citation (Scopus)

Abstract

Ionic polymer transducers (IPT) are a class of devices that leverage electroactive polymers (EAP), specifically electrolyte-swollen ionomeric membranes, to perform energy conversions. Energy transformation from input to output is referred to as transduction and occurs between the electrical and mechanical domains. The present study expands on IPT investigations with a novel series of sulfonated polysulfones (sBPS), with specific interest in the effect of polymer topology on actuator performance. A hydrophilic ionic liquid was combined with a series of sBPS through a casting method to create hydrated membranes that contained target uptakes (f) of the diluent. The ionic liquid's hydrophilic, yet organic nature raised the issue of its degree of compatibility and miscibility with the microphase separated domains of the host ionomeric membrane. Initial studies of the ionomer - ionic liquid morphology were performed with synchrotron small angle X-ray scattering (SAXS). The effective plasticization of the membranes was identified with dynamic mechanical analysis (DMA) in terms of varied storage modulus and thermal transitions with ionic liquid uptake. Electrical impedance spectroscopy (EIS) was employed to quantify the changes in ionic conductivity for each sBPS ionomer across a range of uptake. Combined results from these techniques implied that the presence of large amounts of ionic liquid swelled the hydrophilic domains of the ionomer and greatly increased the ionic conductivity. Decreases in storage modulus and the glass transition temperature were proportional to one another but of a lesser magnitude than changes in conductivity. The present range of ionic liquid uptake for sBPS was sufficient to identify the critical uptake (fc) for three of the four ionomers in the series. Future work to construct IPTs with these components will use the critical uptake as a minimum allowable content of ionic liquid to optimize the balance of electrical and mechanical properties for the device components.

Original languageEnglish
Title of host publicationElectroactive Polymer Actuators and Devices (EAPAD) 2009
Volume7287
DOIs
Publication statusPublished - 2009 Sep 10
Externally publishedYes
EventElectroactive Polymer Actuators and Devices (EAPAD) 2009 - San Diego, CA, United States
Duration: 2009 Mar 92009 Mar 12

Other

OtherElectroactive Polymer Actuators and Devices (EAPAD) 2009
CountryUnited States
CitySan Diego, CA
Period09/3/909/3/12

Fingerprint

Ionic Liquid
Ionic Liquids
Ionic liquids
Transducer
Transducers
Polymers
transducers
Membrane
membranes
Membranes
Ionomers
polymers
liquids
Conductivity
Ionic conductivity
ion currents
Series
Modulus
Elastic moduli
Electroactive Polymers

Keywords

  • DMA
  • EIS
  • Electroactive polymer
  • Electromechanical transductionhighly branched sulfonated polysulfone
  • Ionic liquid
  • Ionic polymer transducer
  • IPMC
  • IPT
  • SAXS

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Duncan, A. J., Leo, D. J., Long, T. E., Akle, B. J., Park, J. K., & Moore, R. B. (2009). Electromechanical performance and membrane stability of novel ionic polymer transducers constructed in the presence of ionic liquids. In Electroactive Polymer Actuators and Devices (EAPAD) 2009 (Vol. 7287). [728711] https://doi.org/10.1117/12.815874

Electromechanical performance and membrane stability of novel ionic polymer transducers constructed in the presence of ionic liquids. / Duncan, Andrew J.; Leo, Donald J.; Long, Timothy Edward; Akle, Barbar J.; Park, Jong K.; Moore, Robert B.

Electroactive Polymer Actuators and Devices (EAPAD) 2009. Vol. 7287 2009. 728711.

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

Duncan, AJ, Leo, DJ, Long, TE, Akle, BJ, Park, JK & Moore, RB 2009, Electromechanical performance and membrane stability of novel ionic polymer transducers constructed in the presence of ionic liquids. in Electroactive Polymer Actuators and Devices (EAPAD) 2009. vol. 7287, 728711, Electroactive Polymer Actuators and Devices (EAPAD) 2009, San Diego, CA, United States, 09/3/9. https://doi.org/10.1117/12.815874
Duncan AJ, Leo DJ, Long TE, Akle BJ, Park JK, Moore RB. Electromechanical performance and membrane stability of novel ionic polymer transducers constructed in the presence of ionic liquids. In Electroactive Polymer Actuators and Devices (EAPAD) 2009. Vol. 7287. 2009. 728711 https://doi.org/10.1117/12.815874
Duncan, Andrew J. ; Leo, Donald J. ; Long, Timothy Edward ; Akle, Barbar J. ; Park, Jong K. ; Moore, Robert B. / Electromechanical performance and membrane stability of novel ionic polymer transducers constructed in the presence of ionic liquids. Electroactive Polymer Actuators and Devices (EAPAD) 2009. Vol. 7287 2009.
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abstract = "Ionic polymer transducers (IPT) are a class of devices that leverage electroactive polymers (EAP), specifically electrolyte-swollen ionomeric membranes, to perform energy conversions. Energy transformation from input to output is referred to as transduction and occurs between the electrical and mechanical domains. The present study expands on IPT investigations with a novel series of sulfonated polysulfones (sBPS), with specific interest in the effect of polymer topology on actuator performance. A hydrophilic ionic liquid was combined with a series of sBPS through a casting method to create hydrated membranes that contained target uptakes (f) of the diluent. The ionic liquid's hydrophilic, yet organic nature raised the issue of its degree of compatibility and miscibility with the microphase separated domains of the host ionomeric membrane. Initial studies of the ionomer - ionic liquid morphology were performed with synchrotron small angle X-ray scattering (SAXS). The effective plasticization of the membranes was identified with dynamic mechanical analysis (DMA) in terms of varied storage modulus and thermal transitions with ionic liquid uptake. Electrical impedance spectroscopy (EIS) was employed to quantify the changes in ionic conductivity for each sBPS ionomer across a range of uptake. Combined results from these techniques implied that the presence of large amounts of ionic liquid swelled the hydrophilic domains of the ionomer and greatly increased the ionic conductivity. Decreases in storage modulus and the glass transition temperature were proportional to one another but of a lesser magnitude than changes in conductivity. The present range of ionic liquid uptake for sBPS was sufficient to identify the critical uptake (fc) for three of the four ionomers in the series. Future work to construct IPTs with these components will use the critical uptake as a minimum allowable content of ionic liquid to optimize the balance of electrical and mechanical properties for the device components.",
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