DataVXACS Applied Nano MaterialsPaper
journal article·2021-08-27Open access

Sprayable Ultrablack Coating Based on Hollow Carbon Nanospheres

Yuefan Hu, Kangli Cao, Hao Rong, Jun Xu, Hexiang Han, Huifen Wang, Lorenzo Pattelli, Na Li, Hongbo Xu, Jiupeng Zhao, Lei Pan, Aleksandr Kuchmizhak, Yao Li

ACS Applied Nano Materials· Volume 4· Issue 8
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Source abstract

Abstract

Inexpensive, easy-to-implement coatings exhibiting extremely low reflectance within a broad spectral range, and good adhesion to substrates are in high demand for high-precision optical instruments and solar energy harvesting. Herein, we demonstrate a highly absorbing coating based on hollow carbon nanospheres (HCSs). The coatings are formed via a simple and high-performing air-spraying process with a tailored paint formulation containing HCSs as an absorbing pigment and a fluororesin as a binder. By optimizing the pigment/binder mass ratio (P/B), we produce functional coatings that exhibit solar absorptance up to 0.985 and good adhesion to aluminum sheets of grade 2 (according to the ISO 2409 standard). The excellent solar absorptance of the obtained coatings results from their hierarchical nano- and microscale surface morphology, providing a refractive index gradient on the air–coating interface as well as remarkable light trapping performance. The former is due to the hollow structure in carbon spheres, which is preserved after the addition of the binder because the size of binder particles is larger than the holes on the shell of the HCSs. The latter is attributed to the micronodules and micropits of the coating surface formed by the agglomeration of the HCSs, which enhances absorption by multiple scattering.
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Research context

Nanomaterials

OpenAlex topics: Thermal Radiation and Cooling Technologies · Surface Modification and Superhydrophobicity · ZnO doping and properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, P.R. China

Shanghai Institute of Spacecraft Equipment, Shanghai 200240, P.R. China

European Laboratory for Non-linear Spectroscopy (LENS), Università di Firenze, Sesto Fiorentino 50019, Italy

Istituto Nazionale di Ricerca Metrologica (INRiM), 10135 Turin, Italy

Institute for Automation and Control Processes, Far Eastern Branch, Russian Academy of Sciences, Vladivostok 690041, Russian Federation

Far Eastern Federal University, Vladivostok 690922, Russia

National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150001, China

Funding

China Postdoctoral Science Foundation · Heilongjiang Provincial Postdoctoral Science Foundation · Ministry of Science and Higher Education of the Russian Federation · National Natural Science Foundation of China · Shanghai Aerospace Science and Technology Innovation Foundation

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