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      https://www.ias.ac.in/article/fulltext/boms/043/0062

    • Keywords

       

      LaB$_6$; self-healing; preparation; insulation film.

    • Abstract

       

      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 (LaB$_6$)/poly(methacrylate-2-ureido-4[1H]-pyrimidinone) functionalized poly($n$-butyl acrylate) (PnBA-$r$-PMAUPy) film was prepared via an in-situ radical polymerization method to achieve heat insulation and self-healing performance. LaB$_6$ nanoparticles synthesized bya low-temperature method were employed as a NIR shielding material, while PnBA-$r$-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 LaB$_6$ 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 LaB$_6$, respectively. The self-healing film forheat-shielding window can be a promising candidate with long-term service.

    • Author Affiliations

       

      QIAN LIU1 CHAOFAN ZHANG1 LIXIA YANG1 LIANGJIU BAI1 YING LIANG1 WENXIANG WANG1 HUAWEI YANG1 DONGLEI WEI1 HOU CHEN1

      1. Shandong Key University Laboratory of High Performance and Functional Polymer, School of Chemistry and Materials Science, Ludong University, Yantai 264025, People’s Republic of China
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