Abstract
Poly(vinylidenefluoride-co-trifluoroethylene) (PVDF-TrFE)/SWCNT nanocomposites with ultra-low percolation threshold were prepared by interfacial control using a block copolymer comapatibilizer. For this, a well-defined block copolymer of poly(3-hexylthiophene) (P3HT) and poly(methyl methacrylate) (PMMA) (P3HT-b-PMMA) was synthesized by combination of GRIM and ATRP (M<inf>n</inf> = 24 K, M<inf>w</inf>/M<inf>n</inf> = 1.25), where the P3HT block segment wrapped the SWCNTs by π-π interaction and the resulting PMMA block segment dangled from the SWCNTs, which gave de-bundled SWCNTs without any aggregations for over 5 months in most common organic solvents for PMMA. The block copolymer coated SWCNT (TMCNT) was then mixed with PVDF-TrFE to prepare PVDF-TrFE/SWCNT nanocomposites (PVT-TMCNT), which enabled excellent dispersion of SWCNT in a PVDF-TrFE matrix without aggregation due to the miscibility of the PMMA on TMCNT and PVDF-TrFE. Obtained PVT-TMCNT showed large enhancements of the electrical conductivity and the dielectric constant with ultra-low percolation threshold (f<inf>c</inf> = 0.07 wt.%) due to excellent interfacial control by the block copolymer comapatibilizer between SWCNT and PVDF-TrFE. Improved ferroelectric properties of PVT-TMCNT were also observed by an increase of field-induced polarization response, which was almost over 10-times higher than for neat PVDF-TrFE.
| Original language | English |
|---|---|
| Pages (from-to) | 55-63 |
| Number of pages | 9 |
| Journal | Polymer (United Kingdom) |
| Volume | 77 |
| DOIs | |
| Publication status | Published - 2015 Oct 23 |
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Keywords
- Block copolymers
- Carbon nanotubes
- Fluoropolymers
ASJC Scopus subject areas
- Organic Chemistry
- Polymers and Plastics
Cite this
Interfacial control of PVDF-TrFE/SWCNT nanocomposites using P3HT-PMMA block copolymer for ultra-low percolation threshold. / Cho, Kie Yong; Lee, Yun Jae; Kim, Hyun Ji; Yoon, Ho Gyu; Hwang, Seung Sang; Han, Yang Kyoo; Baek, Kyung Youl.
In: Polymer (United Kingdom), Vol. 77, 23.10.2015, p. 55-63.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Interfacial control of PVDF-TrFE/SWCNT nanocomposites using P3HT-PMMA block copolymer for ultra-low percolation threshold
AU - Cho, Kie Yong
AU - Lee, Yun Jae
AU - Kim, Hyun Ji
AU - Yoon, Ho Gyu
AU - Hwang, Seung Sang
AU - Han, Yang Kyoo
AU - Baek, Kyung Youl
PY - 2015/10/23
Y1 - 2015/10/23
N2 - Poly(vinylidenefluoride-co-trifluoroethylene) (PVDF-TrFE)/SWCNT nanocomposites with ultra-low percolation threshold were prepared by interfacial control using a block copolymer comapatibilizer. For this, a well-defined block copolymer of poly(3-hexylthiophene) (P3HT) and poly(methyl methacrylate) (PMMA) (P3HT-b-PMMA) was synthesized by combination of GRIM and ATRP (Mn = 24 K, Mw/Mn = 1.25), where the P3HT block segment wrapped the SWCNTs by π-π interaction and the resulting PMMA block segment dangled from the SWCNTs, which gave de-bundled SWCNTs without any aggregations for over 5 months in most common organic solvents for PMMA. The block copolymer coated SWCNT (TMCNT) was then mixed with PVDF-TrFE to prepare PVDF-TrFE/SWCNT nanocomposites (PVT-TMCNT), which enabled excellent dispersion of SWCNT in a PVDF-TrFE matrix without aggregation due to the miscibility of the PMMA on TMCNT and PVDF-TrFE. Obtained PVT-TMCNT showed large enhancements of the electrical conductivity and the dielectric constant with ultra-low percolation threshold (fc = 0.07 wt.%) due to excellent interfacial control by the block copolymer comapatibilizer between SWCNT and PVDF-TrFE. Improved ferroelectric properties of PVT-TMCNT were also observed by an increase of field-induced polarization response, which was almost over 10-times higher than for neat PVDF-TrFE.
AB - Poly(vinylidenefluoride-co-trifluoroethylene) (PVDF-TrFE)/SWCNT nanocomposites with ultra-low percolation threshold were prepared by interfacial control using a block copolymer comapatibilizer. For this, a well-defined block copolymer of poly(3-hexylthiophene) (P3HT) and poly(methyl methacrylate) (PMMA) (P3HT-b-PMMA) was synthesized by combination of GRIM and ATRP (Mn = 24 K, Mw/Mn = 1.25), where the P3HT block segment wrapped the SWCNTs by π-π interaction and the resulting PMMA block segment dangled from the SWCNTs, which gave de-bundled SWCNTs without any aggregations for over 5 months in most common organic solvents for PMMA. The block copolymer coated SWCNT (TMCNT) was then mixed with PVDF-TrFE to prepare PVDF-TrFE/SWCNT nanocomposites (PVT-TMCNT), which enabled excellent dispersion of SWCNT in a PVDF-TrFE matrix without aggregation due to the miscibility of the PMMA on TMCNT and PVDF-TrFE. Obtained PVT-TMCNT showed large enhancements of the electrical conductivity and the dielectric constant with ultra-low percolation threshold (fc = 0.07 wt.%) due to excellent interfacial control by the block copolymer comapatibilizer between SWCNT and PVDF-TrFE. Improved ferroelectric properties of PVT-TMCNT were also observed by an increase of field-induced polarization response, which was almost over 10-times higher than for neat PVDF-TrFE.
KW - Block copolymers
KW - Carbon nanotubes
KW - Fluoropolymers
UR - http://www.scopus.com/inward/record.url?scp=84942241285&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84942241285&partnerID=8YFLogxK
U2 - 10.1016/j.polymer.2015.09.008
DO - 10.1016/j.polymer.2015.09.008
M3 - Article
AN - SCOPUS:84942241285
VL - 77
SP - 55
EP - 63
JO - Polymer (United Kingdom)
JF - Polymer (United Kingdom)
SN - 0032-3861
ER -