Hyeon Jun Sima, Changsoon Choia, Chang Jun Lee b, Youn Tae Kim*b and Seon Jeong Kim**a
a Center for Bio-Artificial Muscle and Department of Biomedical Engineering, Hanyang University, Seoul 133-791, Korea; bIT Fusion Technology Research Center and Department of IT Fusion Technology, Cho- sun University, Gwangju 501-759, Korea
*Corresponding author.E-mail: sjk@hanyang.ac.kr.
원문 링크 : http://seonjeongkim.cafe24.com/link
Abstract
We developed a flexible two-ply piezoelectric yarn-type generator using an electrospun poly- vinylidenefluoride-co-trifluoroethylene (PVDF–TrFE) mat and a commercially available silver-coated ny-
lon fiber. By rolling the silver-coated nylon fiber into the electrospun PVDF–TrFE mat as the inner elec-
trode, the two-dimensional piezoelectric PVDF–TrFE mat was easily transformed into a one-dimensional fiber. Then sil- ver-coated nylon fiber rolled in PVDF–TrFE was plied with another similar fiber to make a flexible two-ply piezoelectric yarn. The overall fabrication processes of the flexible two-ply piezoelectric yarn are simple and have a high application potential. The flexible two-ply piezoelectric yarn can generate up to 0.7 V in compression and 0.55 V in tension. The yarn retained the piezoelectric performance in various shapes, such as a sewn structure. In addition, the piezoelectric perform- ance was sensitive to velocity and pressure. The flexible two-ply piezoelectric yarn has potential applications as a human motion sensor, as a building block of energy-harvesting textiles, and in self-powered biomedical applications.