期刊
ADVANCED MATERIALS TECHNOLOGIES
卷 4, 期 9, 页码 -出版社
WILEY
DOI: 10.1002/admt.201900363
关键词
3D printing; Ag flake; capacitive sensor; stretchable conductors; wiring
资金
- National Research Foundation of Korea (NRF) - Korea Government (MSIT) [2019R1A2B5B01070286]
- Brain Korea 21 Plus Project in 2019
The progress in 3D printing research has led to significant developments ranging from customized printing to rapid prototyping. However, the 3D printing of electrodes, especially stretchable electrodes for the fabrication of 3D printable electronic devices, is challenging due to the inherent weakness with respect to the printing material. A novel preparation method is reported for a 3D printable conductive ink with a self-wiring effect during heat treatment, which pushes the silicone rubber outward and results in the accumulation of the conductors within the wire. This effect results in the formation of a polymer shell around the conductor, thus yielding conductors with larger stretchability and soft passivation characteristics. The conductive ink is prepared via the following steps: i) mixing of conductive filler, silicone rubbers, and solvent; followed by ii) soft heat treatment for soft curing and solvent evaporation. Furthermore, a capacitive sensor is fabricated using this dielectric polymer layer. As a demonstration, a mouse controller is fabricated using a capacitive sensor array prepared using the conductors developed in this study.
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