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

Sensors

Kyoungho Song¹  Jonghan Lee¹  Hansol Son¹  Mijung Lee¹  Suwon Park¹  Jungsik Jang¹  Hyun-joo Choi¹ 

[1] Department of Materials Science and Engineering, Kookmin University, Seoul 02707, Korea;

关键词: conductive composites;    3D printing;    hybrid filler;    piezoresistive sensitivity;    health monitoring;    touch/flexible sensors;   

DOI  :  10.3390/s21206813

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown