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Communication

Fabrication of Piezo-Resistance Composites Containing Thermoplastic Polyurethane/Hybrid Filler Using 3D Printing

Department of Materials Science and Engineering, Kookmin University, Seoul 02707, Korea
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Author to whom correspondence should be addressed.
Academic Editors: Sung Hoon Kang and Zhiyong Xia
Sensors 2021, 21(20), 6813; https://doi.org/10.3390/s21206813
Received: 30 August 2021 / Revised: 5 October 2021 / Accepted: 6 October 2021 / Published: 13 October 2021
(This article belongs to the Special Issue Soft Composite-Based Sensors)
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. View Full-Text
Keywords: conductive composites; 3D printing; hybrid filler; piezoresistive sensitivity; health monitoring; touch/flexible sensors conductive composites; 3D printing; hybrid filler; piezoresistive sensitivity; health monitoring; touch/flexible sensors
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MDPI and ACS Style

Song, K.; Son, H.; Park, S.; Lee, J.; Jang, J.; Lee, M.; Choi, H.-j. Fabrication of Piezo-Resistance Composites Containing Thermoplastic Polyurethane/Hybrid Filler Using 3D Printing. Sensors 2021, 21, 6813. https://doi.org/10.3390/s21206813

AMA Style

Song K, Son H, Park S, Lee J, Jang J, Lee M, Choi H-j. Fabrication of Piezo-Resistance Composites Containing Thermoplastic Polyurethane/Hybrid Filler Using 3D Printing. Sensors. 2021; 21(20):6813. https://doi.org/10.3390/s21206813

Chicago/Turabian Style

Song, Kyoungho, Hansol Son, Suwon Park, Jonghan Lee, Jungsik Jang, Mijung Lee, and Hyun-joo Choi. 2021. "Fabrication of Piezo-Resistance Composites Containing Thermoplastic Polyurethane/Hybrid Filler Using 3D Printing" Sensors 21, no. 20: 6813. https://doi.org/10.3390/s21206813

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