Imidazolium-Containing ABA Triblock Copolymers as Electroactive Devices

Evan Margaretta, Gregory B. Fahs, David L. Inglefield, Chainika Jangu, Dong Wang, James R. Heflin, Robert B. Moore, Timothy Edward Long

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Two-step reversible addition-fragmentation chain transfer (RAFT) polymerization and two subsequent postpolymerization modification steps afforded well-defined ABA triblock copolymers featuring mechanically reinforcing polystyrene outer blocks and 1-methylimidazole-neutralized poly(acrylic acid)-based central blocks. Size exclusion chromatography and 1H NMR spectroscopy confirmed predictable molecular weights and narrow distributions. The ionic liquid (IL) 1-ethyl-3-methylimidazolium trifluoromethanesulfonate ([EMIm][OTf]) was incorporated at 30 wt % into polymeric films. Thermogravimetric analysis, differential scanning calorimetry, and dynamic mechanical analysis determined the thermomechanical properties of the polymers and polymer-IL composites. Atomic force microscopy, small-angle X-ray scattering (SAXS), and transmission electron microscopy (TEM) determined surface and bulk morphologies, and poly(Sty-b-AA(MeIm)-b-Sty) exhibited a change from packed cylindrical to lamellar morphology in SAXS upon IL incorporation. Electrochemical impedance spectroscopy determined the in-plane ionic conductivities of the polymer-IL membranes (μ 10-4 S/cm). A device fabricated from poly(Sty-b-AA(MeIm)-b-Sty) with 30 wt % incorporated IL demonstrated mechanical actuation under a low applied voltage of 4 V.

Original languageEnglish
Pages (from-to)1280-1288
Number of pages9
JournalACS Applied Materials and Interfaces
Volume8
Issue number2
DOIs
Publication statusPublished - 2016 Jan 20
Externally publishedYes

Fingerprint

Ionic Liquids
Ionic liquids
Block copolymers
Polymers
carbopol 940
X ray scattering
Liquid membranes
Size exclusion chromatography
Polystyrenes
Dynamic mechanical analysis
Ionic conductivity
Electrochemical impedance spectroscopy
Polymer films
Nuclear magnetic resonance spectroscopy
Acrylics
Thermogravimetric analysis
Differential scanning calorimetry
Atomic force microscopy
Molecular weight
Polymerization

Keywords

  • block copolymers
  • controlled polymerization
  • electromechanical actuators
  • ionic liquids
  • self-assembly

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Margaretta, E., Fahs, G. B., Inglefield, D. L., Jangu, C., Wang, D., Heflin, J. R., ... Long, T. E. (2016). Imidazolium-Containing ABA Triblock Copolymers as Electroactive Devices. ACS Applied Materials and Interfaces, 8(2), 1280-1288. https://doi.org/10.1021/acsami.5b09965

Imidazolium-Containing ABA Triblock Copolymers as Electroactive Devices. / Margaretta, Evan; Fahs, Gregory B.; Inglefield, David L.; Jangu, Chainika; Wang, Dong; Heflin, James R.; Moore, Robert B.; Long, Timothy Edward.

In: ACS Applied Materials and Interfaces, Vol. 8, No. 2, 20.01.2016, p. 1280-1288.

Research output: Contribution to journalArticle

Margaretta, E, Fahs, GB, Inglefield, DL, Jangu, C, Wang, D, Heflin, JR, Moore, RB & Long, TE 2016, 'Imidazolium-Containing ABA Triblock Copolymers as Electroactive Devices', ACS Applied Materials and Interfaces, vol. 8, no. 2, pp. 1280-1288. https://doi.org/10.1021/acsami.5b09965
Margaretta E, Fahs GB, Inglefield DL, Jangu C, Wang D, Heflin JR et al. Imidazolium-Containing ABA Triblock Copolymers as Electroactive Devices. ACS Applied Materials and Interfaces. 2016 Jan 20;8(2):1280-1288. https://doi.org/10.1021/acsami.5b09965
Margaretta, Evan ; Fahs, Gregory B. ; Inglefield, David L. ; Jangu, Chainika ; Wang, Dong ; Heflin, James R. ; Moore, Robert B. ; Long, Timothy Edward. / Imidazolium-Containing ABA Triblock Copolymers as Electroactive Devices. In: ACS Applied Materials and Interfaces. 2016 ; Vol. 8, No. 2. pp. 1280-1288.
@article{57ec812dc72d43eeaf80062c0d52fc0d,
title = "Imidazolium-Containing ABA Triblock Copolymers as Electroactive Devices",
abstract = "Two-step reversible addition-fragmentation chain transfer (RAFT) polymerization and two subsequent postpolymerization modification steps afforded well-defined ABA triblock copolymers featuring mechanically reinforcing polystyrene outer blocks and 1-methylimidazole-neutralized poly(acrylic acid)-based central blocks. Size exclusion chromatography and 1H NMR spectroscopy confirmed predictable molecular weights and narrow distributions. The ionic liquid (IL) 1-ethyl-3-methylimidazolium trifluoromethanesulfonate ([EMIm][OTf]) was incorporated at 30 wt {\%} into polymeric films. Thermogravimetric analysis, differential scanning calorimetry, and dynamic mechanical analysis determined the thermomechanical properties of the polymers and polymer-IL composites. Atomic force microscopy, small-angle X-ray scattering (SAXS), and transmission electron microscopy (TEM) determined surface and bulk morphologies, and poly(Sty-b-AA(MeIm)-b-Sty) exhibited a change from packed cylindrical to lamellar morphology in SAXS upon IL incorporation. Electrochemical impedance spectroscopy determined the in-plane ionic conductivities of the polymer-IL membranes (μ 10-4 S/cm). A device fabricated from poly(Sty-b-AA(MeIm)-b-Sty) with 30 wt {\%} incorporated IL demonstrated mechanical actuation under a low applied voltage of 4 V.",
keywords = "block copolymers, controlled polymerization, electromechanical actuators, ionic liquids, self-assembly",
author = "Evan Margaretta and Fahs, {Gregory B.} and Inglefield, {David L.} and Chainika Jangu and Dong Wang and Heflin, {James R.} and Moore, {Robert B.} and Long, {Timothy Edward}",
year = "2016",
month = "1",
day = "20",
doi = "10.1021/acsami.5b09965",
language = "English",
volume = "8",
pages = "1280--1288",
journal = "ACS applied materials & interfaces",
issn = "1944-8244",
publisher = "American Chemical Society",
number = "2",

}

TY - JOUR

T1 - Imidazolium-Containing ABA Triblock Copolymers as Electroactive Devices

AU - Margaretta, Evan

AU - Fahs, Gregory B.

AU - Inglefield, David L.

AU - Jangu, Chainika

AU - Wang, Dong

AU - Heflin, James R.

AU - Moore, Robert B.

AU - Long, Timothy Edward

PY - 2016/1/20

Y1 - 2016/1/20

N2 - Two-step reversible addition-fragmentation chain transfer (RAFT) polymerization and two subsequent postpolymerization modification steps afforded well-defined ABA triblock copolymers featuring mechanically reinforcing polystyrene outer blocks and 1-methylimidazole-neutralized poly(acrylic acid)-based central blocks. Size exclusion chromatography and 1H NMR spectroscopy confirmed predictable molecular weights and narrow distributions. The ionic liquid (IL) 1-ethyl-3-methylimidazolium trifluoromethanesulfonate ([EMIm][OTf]) was incorporated at 30 wt % into polymeric films. Thermogravimetric analysis, differential scanning calorimetry, and dynamic mechanical analysis determined the thermomechanical properties of the polymers and polymer-IL composites. Atomic force microscopy, small-angle X-ray scattering (SAXS), and transmission electron microscopy (TEM) determined surface and bulk morphologies, and poly(Sty-b-AA(MeIm)-b-Sty) exhibited a change from packed cylindrical to lamellar morphology in SAXS upon IL incorporation. Electrochemical impedance spectroscopy determined the in-plane ionic conductivities of the polymer-IL membranes (μ 10-4 S/cm). A device fabricated from poly(Sty-b-AA(MeIm)-b-Sty) with 30 wt % incorporated IL demonstrated mechanical actuation under a low applied voltage of 4 V.

AB - Two-step reversible addition-fragmentation chain transfer (RAFT) polymerization and two subsequent postpolymerization modification steps afforded well-defined ABA triblock copolymers featuring mechanically reinforcing polystyrene outer blocks and 1-methylimidazole-neutralized poly(acrylic acid)-based central blocks. Size exclusion chromatography and 1H NMR spectroscopy confirmed predictable molecular weights and narrow distributions. The ionic liquid (IL) 1-ethyl-3-methylimidazolium trifluoromethanesulfonate ([EMIm][OTf]) was incorporated at 30 wt % into polymeric films. Thermogravimetric analysis, differential scanning calorimetry, and dynamic mechanical analysis determined the thermomechanical properties of the polymers and polymer-IL composites. Atomic force microscopy, small-angle X-ray scattering (SAXS), and transmission electron microscopy (TEM) determined surface and bulk morphologies, and poly(Sty-b-AA(MeIm)-b-Sty) exhibited a change from packed cylindrical to lamellar morphology in SAXS upon IL incorporation. Electrochemical impedance spectroscopy determined the in-plane ionic conductivities of the polymer-IL membranes (μ 10-4 S/cm). A device fabricated from poly(Sty-b-AA(MeIm)-b-Sty) with 30 wt % incorporated IL demonstrated mechanical actuation under a low applied voltage of 4 V.

KW - block copolymers

KW - controlled polymerization

KW - electromechanical actuators

KW - ionic liquids

KW - self-assembly

UR - http://www.scopus.com/inward/record.url?scp=84955323381&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84955323381&partnerID=8YFLogxK

U2 - 10.1021/acsami.5b09965

DO - 10.1021/acsami.5b09965

M3 - Article

AN - SCOPUS:84955323381

VL - 8

SP - 1280

EP - 1288

JO - ACS applied materials & interfaces

JF - ACS applied materials & interfaces

SN - 1944-8244

IS - 2

ER -