| 초록 |
Piezoelectric energy harvesters convert mechanical strain into electric voltage or current. In this research, we have manufactured a series of nanocellulose films including different barium titanate (BaTiO3) nanofiber contents of 30-60 wt% via aqueous solution casting, and have investigated their microstructures and piezoelectric performance by using XRD, SEM, Raman, and multimeter. For the purpose, BaTiO3 nanofibers are fabricated by electrospinning of a sol-gel precursor solution, followed by calcinating the precursor nanofibers at 1000 °C. XRD results demonstrate the tetragonal crystal structure of BaTiO3 nanofibers. SEM images reveal that BaTiO3 nanofibers are dominantly located at the bottom of the nanocellulose films. A maximum piezoelectric output voltage for the nanocellulose film with 40 wt% BaTiO3 nanofiber is measured to be 0.64 ± 0.13 V under compression and 1.44 ± 0.33 V under bending. |
