Preparation of Three-dimensional Conductive Network Carbon-based Aqueous Ink and Its Application in Flexible Electric Heating Devices

HU Qiuchen; SHI Weiqian; YANG Jianjun; WU Mingyuan; WU Qingyun; LIU Jiuyi; ZHANG Jian'an

doi:10.19554/j.cnki.1001-3563.2025.07.007

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Packaging Engineering ›› 2025 ›› Issue (7) : 54-61. DOI: 10.19554/j.cnki.1001-3563.2025.07.007

Preparation of Three-dimensional Conductive Network Carbon-based Aqueous Ink and Its Application in Flexible Electric Heating Devices

HU Qiuchen¹, SHI Weiqian¹, YANG Jianjun², WU Mingyuan², WU Qingyun², LIU Jiuyi², ZHANG Jian'an³

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Abstract

The work aims to study the one-pot preparation process of point, line, plane -carbon black/multi-walled carbon nanotubes/graphene three-dimensional conductive network carbon-based aqueous ink and its application in flexible electric heating devices. The optimal pigment-binder ratios and the preparation process of flexible electric heating devices were determined by exploring the factors such as the grinding time of the carbon-based slurry, the pigment-to-base ratio of the ink and the thickness of the ink, the area of the flexible electric heating device, and the effect of different voltages on the heating performance of the electric heating device through the one-factor-variable method. When the grinding time was 5.5 h, the pigment-binder ratio was 2.5∶1.0, and the screen printing layers of the carbon-based conductive ink were 2, the lowest resistivity of the ink was 2.813 Ω.cm, and the resistance change rate of the flexible electric heating device was less than 3% after 500 times of bending and folding. When the external voltage was 12 V safety voltage, it only took about 20 s to reach a stable temperature of 170 ℃. The three-dimensional conductive network and the appropriate grinding time, pigment ratio and number of screen printing layers reduce the conductive particle voids to a certain extent, lower the percolation threshold and improve the conductivity of the ink. This carbon-based conductive ink provides a new technological path and support for mass production of flexible electronic devices.

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HU Qiuchen, SHI Weiqian, YANG Jianjun, WU Mingyuan, WU Qingyun, LIU Jiuyi, ZHANG Jian'an. Preparation of Three-dimensional Conductive Network Carbon-based Aqueous Ink and Its Application in Flexible Electric Heating Devices[J]. Packaging Engineering. 2025(7): 54-61 https://doi.org/10.19554/j.cnki.1001-3563.2025.07.007