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- Title
Fabrication of Piezo-Resistance Composites Containing Thermoplastic Polyurethane/Hybrid Filler Using 3D Printing.
- Authors
Song, Kyoungho; Son, Hansol; Park, Suwon; Lee, Jonghan; Jang, Jungsik; Lee, Mijung; Choi, Hyun-joo
- Abstract
In this study, 3D-printable flexible piezoresistive composites containing various amounts of cilia-like hybrid fillers were developed. In the hybrid fillers, micro-scale Cu particles with a 0D structure may allow them to easily disperse into the flexible TPU matrix. Furthermore, nanoscale multi-walled carbon nanotubes (MWCNTs) with a high aspect ratio, present on the surface of the Cu particles, form an electrical network when the polymer matrix is strained, thus providing good piezoresistive performance as well as good flowability of the composite materials. With an optimal hybrid filler content (17.5 vol.%), the 3D-printed piezoresistive composite exhibits a gauge factor of 6.04, strain range of over 20%, and durability of over 100 cycles. These results highlight the potential applications of piezoresistive pressure sensors for health monitoring, touch sensors, and electronic skin.
- Subjects
THREE-dimensional printing; THERMOPLASTIC composites; MULTIWALLED carbon nanotubes; TACTILE sensors; POLYURETHANES; POLYMER networks; POLYMERIC composites
- Publication
Sensors (14248220), 2021, Vol 21, Issue 20, p6813
- ISSN
1424-8220
- Publication type
Article
- DOI
10.3390/s21206813