TY - JOUR
T1 - Highly stretchable dielectric nanocomposites based on single-walled carbon nanotube/ionic liquid gels
AU - Oh, Kiwon
AU - Lee, Jang Yeol
AU - Lee, Sang Soo
AU - Park, Min
AU - Kim, Daeheum
AU - Kim, Heesuk
PY - 2013/6/28
Y1 - 2013/6/28
N2 - We fabricated a highly stretchable dielectric composite using ionic liquid-based single-walled carbon nanotube gel (IL-SWCNT) as a dielectric filler and polydimethylsiloxane (PDMS) as an elastomer matrix. Transmission electron microscopy images showed that the SWCNTs were highly exfoliated and dispersed in the polymer matrix due to the addition of the ionic liquid (IL). The dielectric constant at 100. Hz of the IL-SWCNT/PDMS composite containing 1.6. wt% SWCNTs was twice that of the SWCNT/PDMS composite without IL, and the dielectric loss was one fifth that of the SWCNT/PDMS composite. In addition, the elastic modulus of the IL-SWCNT/PDMS composite was significantly lower (0.36. MPa at a strain of 20%) and the strain at break was higher (350%) compared to the corresponding values of the SWCNT/PDMS composites due to the plasticizer effects of the IL. These results provide the first feasibility study of the use of IL as both an exfoliation agent and a plasticizer in an effort to simultaneously improve the dielectric and mechanical properties of CNT-filled dielectric elastomers.
AB - We fabricated a highly stretchable dielectric composite using ionic liquid-based single-walled carbon nanotube gel (IL-SWCNT) as a dielectric filler and polydimethylsiloxane (PDMS) as an elastomer matrix. Transmission electron microscopy images showed that the SWCNTs were highly exfoliated and dispersed in the polymer matrix due to the addition of the ionic liquid (IL). The dielectric constant at 100. Hz of the IL-SWCNT/PDMS composite containing 1.6. wt% SWCNTs was twice that of the SWCNT/PDMS composite without IL, and the dielectric loss was one fifth that of the SWCNT/PDMS composite. In addition, the elastic modulus of the IL-SWCNT/PDMS composite was significantly lower (0.36. MPa at a strain of 20%) and the strain at break was higher (350%) compared to the corresponding values of the SWCNT/PDMS composites due to the plasticizer effects of the IL. These results provide the first feasibility study of the use of IL as both an exfoliation agent and a plasticizer in an effort to simultaneously improve the dielectric and mechanical properties of CNT-filled dielectric elastomers.
KW - A. Carbon nanotubes
KW - A. Flexible composites
KW - A. Polymer-matrix composites (PMCs)
KW - B. Electrical properties
KW - B. Mechanical properties
UR - http://www.scopus.com/inward/record.url?scp=84878142768&partnerID=8YFLogxK
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U2 - 10.1016/j.compscitech.2013.04.004
DO - 10.1016/j.compscitech.2013.04.004
M3 - Article
AN - SCOPUS:84878142768
VL - 83
SP - 40
EP - 46
JO - Composites Science and Technology
JF - Composites Science and Technology
SN - 0266-3538
ER -