3D Printing of Self-Wiring Conductive Ink with High Stretchability and Stackability for Customized Wearable Devices

In Seon Yoon; Youngsu Oh; Sun Hong Kim; Junhee Choi; Yooji Hwang; Cheol Hwee Park; Byeong Kwon Ju

doi:10.1002/admt.201900363

3D Printing of Self-Wiring Conductive Ink with High Stretchability and Stackability for Customized Wearable Devices

In Seon Yoon, Youngsu Oh, Sun Hong Kim, Junhee Choi, Yooji Hwang, Cheol Hwee Park, Byeong Kwon Ju^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

32 Citations (Scopus)

Abstract

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.

Original language	English
Article number	1900363
Journal	Advanced Materials Technologies
Volume	4
Issue number	9
DOIs	https://doi.org/10.1002/admt.201900363
Publication status	Published - 2019 Sept 1

Bibliographical note

Funding Information:
I.S.Y. and Y.O. contributed equally to this work. I.S.Y. and Y.O. developed the idea and designed the experiment. I.S.Y., Y.O., and S.H.K. conducted the experiments and investigated the obtained results. I.S.Y., J.C., Y.H., C.H.P., and B.-K.J. wrote the text of the paper. This work was partly supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MSIT) (no. 2019R1A2B5B01070286), and the Brain Korea 21 Plus Project in 2019.

Publisher Copyright:
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Keywords

3D printing
Ag flake
capacitive sensor
stretchable conductors
wiring

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Industrial and Manufacturing Engineering

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10.1002/admt.201900363

Cite this

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title = "3D Printing of Self-Wiring Conductive Ink with High Stretchability and Stackability for Customized Wearable Devices",

abstract = "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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author = "Yoon, \{In Seon\} and Youngsu Oh and Kim, \{Sun Hong\} and Junhee Choi and Yooji Hwang and Park, \{Cheol Hwee\} and Ju, \{Byeong Kwon\}",

note = "Funding Information: I.S.Y. and Y.O. contributed equally to this work. I.S.Y. and Y.O. developed the idea and designed the experiment. I.S.Y., Y.O., and S.H.K. conducted the experiments and investigated the obtained results. I.S.Y., J.C., Y.H., C.H.P., and B.-K.J. wrote the text of the paper. This work was partly supported by the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MSIT) (no. 2019R1A2B5B01070286), and the Brain Korea 21 Plus Project in 2019. Publisher Copyright: {\textcopyright} 2019 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim",

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AU - Hwang, Yooji

AU - Park, Cheol Hwee

AU - Ju, Byeong Kwon

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N2 - 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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3D Printing of Self-Wiring Conductive Ink with High Stretchability and Stackability for Customized Wearable Devices

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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