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나노 구조 물리 연구단
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Extraordinarily High Conductivity of Stretchable Fibers of Polyurethane and Silver Nanoflowers

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Title
Extraordinarily High Conductivity of Stretchable Fibers of Polyurethane and Silver Nanoflowers
Author(s)
Rujun Ma; Kang, B.; Cho, S.; Choi, M.; Seunghyun Baik
Publication Date
2015-11
Journal
ACS NANO, v.9, no.11, pp.10876 - 10886
Publisher
AMER CHEMICAL SOC
Abstract
Stretchable conductive composites have received considerable attention recently, and they should have high conductivity and mechanical strength. Here we report highly conductive stretchable fibers synthesized by the scalable wet spinning process using flower-shaped silver nanoparticles with nanodisc-shaped petals (Ag nanoflowers) and polyurethane. An extraordinarily high conductivity (41245 S cm-1) was obtained by Ag nanoflowers, which is 2 orders of magnitude greater than that of fibers synthesized using spherical Ag nanoparticles. This was due to the enhanced surface area and vigorous coalescence of nanodisc-shaped petals during the curing process. There was a trade-off relationship between conductivity and stretchability, and the maximum rupture strain was 776%. An analytical model revealed that the enhanced adhesion between Ag nanoflowers and polyurethane provided a high Young's modulus (731.5 MPa) and ultimate strength (39.6 MPa) of the fibers. The fibers exhibited an elastic property after prestretching, and the resistance change of weft-knitted fabric was negligible up to 200% strain. The fibers with extraordinarily high conductivity, stretchability, and mechanical strength may be useful for wearable electronics applications. © 2015 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/2278
ISSN
1936-0851
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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