Highly enhanced electromechanical properties of PVDF-TrFE/SWCNT nanocomposites using an efficient polymer compatibilizer
- Authors
- Cho, Kie Yong; Park, Hyunchul; Kim, Hyun-Ji; Do, Xuan Huy; Koo, Chong Min; Hwang, Seung Sang; Yoon, Ho Gyu; Baek, Kyung-Youl
- Issue Date
- 22-3월-2018
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Carbon nanotubes; Block copolymers; PVDF copolymers; Polymer composites; Actuators
- Citation
- COMPOSITES SCIENCE AND TECHNOLOGY, v.157, pp.21 - 29
- Indexed
- SCIE
SCOPUS
- Journal Title
- COMPOSITES SCIENCE AND TECHNOLOGY
- Volume
- 157
- Start Page
- 21
- End Page
- 29
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/76696
- DOI
- 10.1016/j.compscitech.2018.01.018
- ISSN
- 0266-3538
- Abstract
- PVDF-TrFE/SWCNT nanocomposites with outstanding electromechanical properties were produced using P3HT-PMMA block copolymers as a compatibilizer between PVDF-TrFE and SWCNT. P3HT-PMMA block copolymer coated SWCNT (PTMCNT) was first prepared to utilize pi-pi stacking interactions between SWCNT and the P3HT block segment. The obtained PTMCNTs are highly compatible with the PVDF-TrFE matrix due to strong hydrogen bonding interaction between the polymer matrix and the PMMA block segment on the surface of SWCNT, leading to a very low percolation behavior at 0.05 wt% of SWCNT in PVDF-TrFE. The obtained electroactive PVDF-TrFE/SWCNT nanocomposites showed ca. 50 times increased electromechanical thickness strain, ca. 3200 times increased elastic energy density, and ca. 460 times increased electrical-to-mechanical energy conversion rate in comparison to those of pristine PVD-FTrFE at the relatively low electric field (50 V-pp mu m(-1)). These outstanding properties result from the ultra low percolation of SWCNT along with uniform local field distribution in PVDF-TrFE, which kept not only intrinsic properties of PVDF-TrFE such as all-trans formed crystalline phase and softness but also enhanced electrical properties including dielectric constant. (C) 2018 Elsevier Ltd. All rights reserved.
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Collections - Graduate School > KU-KIST Graduate School of Converging Science and Technology > 1. Journal Articles
- College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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