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

Title
Styrenic block copolymer-sulfonated graphene oxide composite membranes for highly bendable ionic polymer actuators with large ion concentration gradient
Authors
홍순만구종민권태훈이장우강영종한태희조창기황석원
Issue Date
2018-07
Publisher
Composites science and technology
Citation
VOL 163-70
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.
URI
http://pubs.kist.re.kr/handle/201004/68013
ISSN
0266-3538
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KIST Publication > Article
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