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.

中文翻译：

---

定制$$\hbox {LaB}_{\mathrm {6}}$$LaB6 纳米粒子自愈膜用于隔热窗

通过在窗户上使用透明涂层将近红外 (NIR) 与太阳能有效隔离是节能的最重要问题之一。在这项工作中，一种新型六硼化镧 ($$\hbox {LaB}_{\mathrm {6}}$$)/poly(methacrylate-2-ureido-4[1H]-pyrimidinone) 功能化的聚（丙烯酸正丁酯） ) ($$\hbox {PnBA-}r\hbox {-PMAUPy}$$) 薄膜是通过原位自由基聚合方法制备的，以实现隔热和自愈性能。$$\hbox {LaB}_{\mathrm {6}}$$ 采用低温法合成的纳米粒子作为 NIR 屏蔽材料，而 $$\hbox {PnBA-}r\hbox {-PMAUPy}$ $被用作提高长期服务可靠性的材料。受益于氢键相互作用，薄膜在环境温度下的自愈性能显着提高。光吸收结果表明，$$\hbox {LaB}_{\mathrm {6}}$$ 含量的增加可以有效增强近红外屏蔽能力。0.64mm厚的隔热膜近红外阻隔率可达97.5%，20mg的自愈率约为84% $$\hbox {LaB}_{\mathrm {6}}$$ ， 分别。用于隔热窗的自愈膜可以是长期使用的有前途的候选者。