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Bioinspired radiative cooling coating with high emittance and robust self-cleaning for sustainably efficient heat dissipation
  • +4
  • Yong Li,
  • Yingnan Song,
  • Hongye Zu,
  • Hui Yang,
  • Wei Dai,
  • Jingxin Meng,
  • Lei Jiang
Yong Li
Technical Institute of Physics and Chemistry Chinese Academy of Sciences
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Yingnan Song
Technical Institute of Physics and Chemistry Chinese Academy of Sciences
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Hongye Zu
Technical Institute of Physics and Chemistry Chinese Academy of Sciences
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Hui Yang
Technical Institute of Physics and Chemistry Chinese Academy of Sciences
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Wei Dai
Technical Institute of Physics and Chemistry Chinese Academy of Sciences
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Jingxin Meng
Technical Institute of Physics and Chemistry Chinese Academy of Sciences

Corresponding Author:[email protected]

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Lei Jiang
Technical Institute of Physics and Chemistry Chinese Academy of Sciences
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Abstract

To overcome the overheating phenomena of electronic devices and energy components, developing advanced energy-free cooling coatings with promising radiative property seem an effective and energy-saving way. However, the further application of these coatings is greatly limited by their sustainability because of their fragile and easy contamination. Herein, we report that a bioinspired radiative cooling coating (BRCC) displayed sustainably efficient heat dissipation by the combination of high emittance and robust self-cleaning property. With hierarchical porous structure constructed by multiwalled carbon nanotubes (MWCNTs), modified SiO2 and FSi resin, the involvement of the BRCC improves the cooling performance by increasing ca. 25% total heat transfer coefficient. During the abrasion and soiling tests, the robust self-cleaning capability endows BRCC-coated Al alloy heat sink with stable radiative cooling performance. Moreover, the simulation and experimental results both revealed that reducing surface coverage of BRCC (ca. 80.9 %) can still keep highly cooling efficiency, leading to a cost-effective avenue. Therefore, this study may guide the design and fabrication of advanced radiative cooling coating.
29 Jun 2023Submitted to Exploration
30 Jun 2023Submission Checks Completed
30 Jun 2023Assigned to Editor
08 Jul 2023Reviewer(s) Assigned
24 Jul 2023Review(s) Completed, Editorial Evaluation Pending
01 Sep 2023Editorial Decision: Revise Major
28 Sep 20231st Revision Received
30 Sep 2023Submission Checks Completed
30 Sep 2023Assigned to Editor
07 Oct 2023Reviewer(s) Assigned
08 Oct 2023Review(s) Completed, Editorial Evaluation Pending
16 Oct 2023Editorial Decision: Revise Minor
19 Oct 20232nd Revision Received
23 Oct 2023Submission Checks Completed
23 Oct 2023Assigned to Editor
23 Oct 2023Review(s) Completed, Editorial Evaluation Pending
26 Oct 2023Editorial Decision: Revise Major
31 Oct 20233rd Revision Received
03 Nov 2023Submission Checks Completed
03 Nov 2023Assigned to Editor
03 Nov 2023Review(s) Completed, Editorial Evaluation Pending
21 Nov 2023Editorial Decision: Accept