Highly enhanced electromechanical properties of PVDF-TrFE/SWCNT nanocomposites using an efficient polymer compatibilizer

Kie Yong Cho, Hyunchul Park, Hyun Ji Kim, Xuan Huy Do, Chong Min Koo, Seung Sang Hwang, Ho Gyu Yoon, Kyung Youl Baek

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

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 π-π 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 PVDF-TrFE at the relatively low electric field (50 Vppμm-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.

Original languageEnglish
Pages (from-to)21-29
Number of pages9
JournalComposites Science and Technology
Volume157
DOIs
Publication statusPublished - 2018 Mar 22

Keywords

  • Actuators
  • Block copolymers
  • Carbon nanotubes
  • Polymer composites
  • PVDF copolymers

ASJC Scopus subject areas

  • Ceramics and Composites
  • Engineering(all)

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