Styrenic block copolymer/sulfonated graphene oxide composite membranes for highly bendable ionic polymer actuators with large ion concentration gradient

Jang Woo Lee; Taehoon Kwon; Youngjong Kang; Tae Hee Han; Chang Gi Cho; Soon Man Hong; Suk Won Hwang; Chong Min Koo

doi:10.1016/j.compscitech.2018.05.002

Styrenic block copolymer/sulfonated graphene oxide composite membranes for highly bendable ionic polymer actuators with large ion concentration gradient

Jang Woo Lee, Taehoon Kwon, Youngjong Kang, Tae Hee Han, Chang Gi Cho, Soon Man Hong, Suk Won Hwang, Chong Min Koo

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

In this study, sulfonated graphene oxide (sGO) with a large enhanced sulfonation degree of 1.65 mmol g⁻¹ was simultaneously introduced as a highly ion conduction-activating carbonaceous filler for ionic polymer–metal composite (IPMC) actuator. The nanostructured styrenic block copolymer/sGO/ionic liquid (IL) composite membrane actuators revealed much larger actuation performance than top-ranked polyelectrolyte/IL actuators ever reported so far in terms of bending strain (0.88% under 2 V dc), initial strain rate (0.312% min⁻¹), and charge-specific displacement (276.4 mm C⁻¹). Moreover, SSPB/sGO/IL actuators exhibited excellent actuation performance without drawbacks of conventional IPMCs, such as back-relaxation and early loss of inner solvent. In addition, via tracking the movement of the IL's anion through energy-dispersive X-ray spectroscopy (EDS) analysis, not only the transporting behaviour of IL but also the pumping effect with solvated ion complexes inside the actuator are confirmed for the first time.

Original language	English
Pages (from-to)	63-70
Number of pages	8
Journal	Composites Science and Technology
Volume	163
DOIs	https://doi.org/10.1016/j.compscitech.2018.05.002
State	Published - 28 Jul 2018
Externally published	Yes

Keywords

Actuator
Functional composites
Graphene oxide (GO)
Nanocomposites
Sulfonated styrenic pentablock copolymer (SSPB)

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10.1016/j.compscitech.2018.05.002

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@article{b81d9acd81c147aa871fc0132326d1ff,

title = "Styrenic block copolymer/sulfonated graphene oxide composite membranes for highly bendable ionic polymer actuators with large ion concentration gradient",

abstract = "In this study, sulfonated graphene oxide (sGO) with a large enhanced sulfonation degree of 1.65 mmol g−1 was simultaneously introduced as a highly ion conduction-activating carbonaceous filler for ionic polymer–metal composite (IPMC) actuator. The nanostructured styrenic block copolymer/sGO/ionic liquid (IL) composite membrane actuators revealed much larger actuation performance than top-ranked polyelectrolyte/IL actuators ever reported so far in terms of bending strain (0.88\% under 2 V dc), initial strain rate (0.312\% min−1), and charge-specific displacement (276.4 mm C−1). Moreover, SSPB/sGO/IL actuators exhibited excellent actuation performance without drawbacks of conventional IPMCs, such as back-relaxation and early loss of inner solvent. In addition, via tracking the movement of the IL's anion through energy-dispersive X-ray spectroscopy (EDS) analysis, not only the transporting behaviour of IL but also the pumping effect with solvated ion complexes inside the actuator are confirmed for the first time.",

keywords = "Actuator, Functional composites, Graphene oxide (GO), Nanocomposites, Sulfonated styrenic pentablock copolymer (SSPB)",

author = "Lee, \{Jang Woo\} and Taehoon Kwon and Youngjong Kang and Han, \{Tae Hee\} and Cho, \{Chang Gi\} and Hong, \{Soon Man\} and Hwang, \{Suk Won\} and Koo, \{Chong Min\}",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

month = jul,

day = "28",

doi = "10.1016/j.compscitech.2018.05.002",

language = "English",

volume = "163",

pages = "63--70",

journal = "Composites Science and Technology",

issn = "0266-3538",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Styrenic block copolymer/sulfonated graphene oxide composite membranes for highly bendable ionic polymer actuators with large ion concentration gradient

AU - Lee, Jang Woo

AU - Kwon, Taehoon

AU - Kang, Youngjong

AU - Han, Tae Hee

AU - Cho, Chang Gi

AU - Hong, Soon Man

AU - Hwang, Suk Won

AU - Koo, Chong Min

PY - 2018/7/28

Y1 - 2018/7/28

N2 - In this study, sulfonated graphene oxide (sGO) with a large enhanced sulfonation degree of 1.65 mmol g−1 was simultaneously introduced as a highly ion conduction-activating carbonaceous filler for ionic polymer–metal composite (IPMC) actuator. The nanostructured styrenic block copolymer/sGO/ionic liquid (IL) composite membrane actuators revealed much larger actuation performance than top-ranked polyelectrolyte/IL actuators ever reported so far in terms of bending strain (0.88% under 2 V dc), initial strain rate (0.312% min−1), and charge-specific displacement (276.4 mm C−1). Moreover, SSPB/sGO/IL actuators exhibited excellent actuation performance without drawbacks of conventional IPMCs, such as back-relaxation and early loss of inner solvent. In addition, via tracking the movement of the IL's anion through energy-dispersive X-ray spectroscopy (EDS) analysis, not only the transporting behaviour of IL but also the pumping effect with solvated ion complexes inside the actuator are confirmed for the first time.

AB - In this study, sulfonated graphene oxide (sGO) with a large enhanced sulfonation degree of 1.65 mmol g−1 was simultaneously introduced as a highly ion conduction-activating carbonaceous filler for ionic polymer–metal composite (IPMC) actuator. The nanostructured styrenic block copolymer/sGO/ionic liquid (IL) composite membrane actuators revealed much larger actuation performance than top-ranked polyelectrolyte/IL actuators ever reported so far in terms of bending strain (0.88% under 2 V dc), initial strain rate (0.312% min−1), and charge-specific displacement (276.4 mm C−1). Moreover, SSPB/sGO/IL actuators exhibited excellent actuation performance without drawbacks of conventional IPMCs, such as back-relaxation and early loss of inner solvent. In addition, via tracking the movement of the IL's anion through energy-dispersive X-ray spectroscopy (EDS) analysis, not only the transporting behaviour of IL but also the pumping effect with solvated ion complexes inside the actuator are confirmed for the first time.

KW - Actuator

KW - Functional composites

KW - Graphene oxide (GO)

KW - Nanocomposites

KW - Sulfonated styrenic pentablock copolymer (SSPB)

UR - https://www.scopus.com/pages/publications/85046745678

U2 - 10.1016/j.compscitech.2018.05.002

DO - 10.1016/j.compscitech.2018.05.002

M3 - Article

AN - SCOPUS:85046745678

SN - 0266-3538

VL - 163

SP - 63

EP - 70

JO - Composites Science and Technology

JF - Composites Science and Technology

ER -

Styrenic block copolymer/sulfonated graphene oxide composite membranes for highly bendable ionic polymer actuators with large ion concentration gradient

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