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Tailoring \(\hbox {LaB}_{\mathrm {6}}\) nanoparticle-based self-healing film for heat-shielding window

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Effective insulation of near-infrared (NIR) from solar energy via the use of transparent coating on the windows is one of the most essential issues in energy savings. In this work, a novel lanthanum hexaboride (\(\hbox {LaB}_{\mathrm {6}}\))/poly(methacrylate-2-ureido-4[1H]-pyrimidinone) functionalized poly(n-butyl acrylate) (\(\hbox {PnBA-}r\hbox {-PMAUPy}\)) film was prepared via an in-situ radical polymerization method to achieve heat insulation and self-healing performance. \(\hbox {LaB}_{\mathrm {6}}\) nanoparticles synthesized by a low-temperature method were employed as a NIR shielding material, while \(\hbox {PnBA-}r\hbox {-PMAUPy}\) was utilized as a material to enhance the reliability of long-term service. Benefitting from hydrogen bonding interaction, the film showed a marked progress in self-healing property at ambient temperature. As displayed by optical absorption results, the increase of \(\hbox {LaB}_{\mathrm {6}}\) content can effectively enhance the NIR shielding ability. The NIR blocking ratio of the thermal barrier film with a thickness of 0.64 mm can reach 97.5%, and the self-healing rate is about 84% for 20 mg \(\hbox {LaB}_{\mathrm {6}}\), respectively. The self-healing film for heat-shielding window can be a promising candidate with long-term service.

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The work was supported by the National Natural Science Foundation of China (Nos. 51773086 and 51973086), the Key Program for Basic Research of Natural Science Foundation of Shandong Province (No. ZR2018ZC0946), the Natural Science Foundation of Shandong Province (Nos. ZR2019MEM042 and ZR2018BB027) and the Project of Shandong Province Higher Educational Science (Nos. J16LC20 and J18KA080).

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Correspondence to Lixia Yang.

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Liu, Q., Zhang, C., Yang, L. et al. Tailoring \(\hbox {LaB}_{\mathrm {6}}\) nanoparticle-based self-healing film for heat-shielding window. Bull Mater Sci 43, 62 (2020). https://doi.org/10.1007/s12034-019-2028-5

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  • \(\hbox {LaB}_{\mathrm {6}}\)
  • self-healing
  • preparation
  • insulation film