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. 2020 Sep 19;8(7):nwaa230. doi: 10.1093/nsr/nwaa230

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© The Author(s) 2020. Published by Oxford University Press on behalf of China Science Publishing & Media Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 5. — Conductive smart RGI-wood. (a) Photograph of conductive smart RGI-wood. (b) SEM image of conductive smart RGI-wood with dense structure. (c) CNT-covered SNWP in conductive smart RGI-wood (enlarged micrograph of the marked area in (b)). (d) Conductivity of the conductive smart RGI-wood to volume fraction of CNT curve and fitting line. (e) Electromagnetic shielding performance of the conductive smart RGI-wood. (f) Diagram of self-heating device based on conductive RGI-wood. (g) Thermal infrared image of self-heating device before heat. (h) Thermal infrared image of self-heating device after 5 minutes at a voltage of 1.75 V. (i) Temperature of conductive smart RGI-wood at a voltage of 1.75 V and a current of 5 A. After the heating process, switching the voltage to 1.4 V can maintain the sample temperature at 55°C, making it a good smart self-heating board.