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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
Author
한태희
Keywords
Nanocomposites; Functional composites; Sulfonated styrenic pentablock copolymer (SSPB); Graphene oxide (GO); Actuator
Issue Date
2018-07
Publisher
ELSEVIER SCI LTD
Citation
COMPOSITES SCIENCE AND TECHNOLOGY, v. 163, page. 63-70
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
https://www.sciencedirect.com/science/article/abs/pii/S0266353818301945?via%3Dihubhttp://repository.hanyang.ac.kr/handle/20.500.11754/119282
ISSN
0266-3538; 1879-1050
DOI
10.1016/j.compscitech.2018.05.002
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ORGANIC AND NANO ENGINEERING(유기나노공학과) > Articles
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