| 학회 |
한국고분자학회 |
| 학술대회 |
2019년 가을 (10/09 ~ 10/11, 제주컨벤션센터) |
| 권호 |
44권 2호 |
| 발표분야 |
고분자가공/복합재료 |
| 제목 |
Electrically Recoverable and Self-healable Conductive Nanocomposite with Ultra-stretchability |
| 초록 |
Nanocomposites conductors are intensively studied as the materials for various types of intrinsically stretchable devices. Recently, self-healable composite conductors and stretchable composite conductors have been previously reported. However, it is still difficult to simultaneously achieve high stretchability, high conductivity and self-healability. Here, we observed an interesting phenomenon, “self-alignment” of conductive fillers in the matrix during the stretching and “electrical recovery” of the nanocomposite conductor under the highly stretched state (over 1700% strain). It enables sustaining of the electrical property and reconstructing of electrically percolative pathways in an ultra-stretchable and self-healable nanocomposite conductor. The self-alignment and autonomously reconstructed percolative pathways were directly verified by using micro-computed tomography and in-situ scanning electron microscopy. The nanocomposite conductor shows high conductivity (average value: 2578 S cm-1; highest value: 3086 S cm-1) at 3500% tensile strain by virtue of efficient strain energy dissipation of the self-healing polymer, self-alignment and rearrangement of silver flakes surrounded by spontaneously formed silver nanoparticles. In addition, the conductor maintains high conductivity and stretchability even after recovered from a complete cut. Finally, we successfully demonstrated electromyogram signals can be monitored by our conductor. |
| 저자 |
김선홍1, Zhenan Bao2, 손동희3, 곽정훈4
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| 소속 |
1Department of Electrical and Computer Engineering, 2Inter-Univ. Semiconductor Research Center, 3Seoul National Univ., 4Department of Chemical Engineering |
| 키워드 |
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| E-Mail |
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