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Abstract
Poly(l-lactic acid) (PLLA) based piezoelectric polymers are gradually becoming the substitute for the conventional piezoelectric ceramic and polymeric materials due to their low cost and biodegradable, non-toxic, piezoelectric and non-pyroelectric nature. To improve the piezoelectric properties of melt-spun poly(l-lactic acid) (PLLA)/BaTiO3, we optimized the post-processing conditions to increase the proportion of the β crystalline phase. The α → β phase transition behaviour was determined by two-dimensional wide-angle x-ray diffraction and differential scanning calorimetry. The piezoelectric properties of PLLA/BaTiO3 fibres were characterised in their yarn and textile form through a tapping method. From these results, we confirmed that the crystalline phase transition of PLLA/BaTiO3 fibres was significantly enhanced under the optimised post-processing conditions at a draw ratio of 3 and temperature of 120 °C during the melt-spinning process. The results indicated that PLLA/BaTiO3 fibres could be a one of the material for organic-based piezoelectric sensors for application in textile-based wearable piezoelectric devices.
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Details
1 Korea Institute of Industrial Technology, Advanced Textile R&D Department, Ansan, Republic of Korea (GRID:grid.454135.2) (ISNI:0000 0000 9353 1134)
2 Hanyang University ERICA, Department of Chemical Engineering, Ansan, Republic of Korea (GRID:grid.49606.3d) (ISNI:0000 0001 1364 9317)
3 Kyung Hee University, Department of Advanced Materials Engineering for Information & Electronics, Yongin, Republic of Korea (GRID:grid.289247.2) (ISNI:0000 0001 2171 7818)
4 Korea Institute of Ceramic Engineering and Technology, Nano Materials & Nano Technology Center, Jinju, Republic of Korea (GRID:grid.410900.c) (ISNI:0000 0004 0614 4603)
5 Sungkyunkwan University (SKKU), School of Advanced Materials Science and Engineering, Suwon, Republic of Korea (GRID:grid.264381.a) (ISNI:0000 0001 2181 989X)
6 University of Seoul, School of Electrical and Computer Engineering, Seoul, Republic of Korea (GRID:grid.267134.5) (ISNI:0000 0000 8597 6969)