Styrenic block copolymer/sulfonated graphene oxide composite membranes for highly bendable ionic polymer actuators with large ion concentration gradient
- Authors
- Lee, Jang-Woo; Kwon, Taehoon; Kang, Youngjong; Han, Tae Hee; Cho, Chang Gi; Hong, Soon Man; Hwang, Suk-Won; Koo, Chong Min
- Issue Date
- 28-7월-2018
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Nanocomposites; Functional composites; Sulfonated styrenic pentablock copolymer (SSPB); Graphene oxide (GO); Actuator
- Citation
- COMPOSITES SCIENCE AND TECHNOLOGY, v.163, pp.63 - 70
- Indexed
- SCIE
SCOPUS
- Journal Title
- COMPOSITES SCIENCE AND TECHNOLOGY
- Volume
- 163
- Start Page
- 63
- End Page
- 70
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/74301
- DOI
- 10.1016/j.compscitech.2018.05.002
- ISSN
- 0266-3538
- 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.
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Collections - Graduate School > KU-KIST Graduate School of Converging Science and Technology > 1. Journal Articles
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