Effectively regulating heat flow between buildings and their environment, through the use of infrared property-structural materials that passively regulate radiative heat dissipation, not only enhances thermal comfort but also offers a potentially cost-effective solution for energy conservation and countering global warming. However, fulfilling the demand for aesthetic appearance and effective display in real-life situations while maintaining infrared properties remains a significant impediment to the commercialization of structural materials. In this work, we utilized ion-dyed cellulose as the base material and employed gel-assisted and thermal pressing methods to produce ion-dyed cooling cellulose bulk. Experimental results demonstrate its bending strength reaching 111 MPa, and impact toughness reaching 79.8 kJ m. While offering a wide range of colors, it exhibits excellent radiative cooling performance. During days with strong solar radiation, three different colors of ion-dyed cooling cellulose bulk achieve temperature reductions of 2.2–3.9 °C. Moreover, the fabrication process is simple, cost-effective, and conducive to industrialization. This study provides a practical and theoretical foundation for the development and design of colored wood-based radiative cooling materials.

中文翻译：

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离子染色纤维素基辐射冷却结构材料


通过使用被动调节辐射散热的红外性能结构材料，有效调节建筑物与其环境之间的热流，不仅可以提高热舒适度，而且还为节能和应对全球变暖提供了一种潜在的具有成本效益的解决方案。然而，在保持红外性能的同时满足现实生活中美观和有效显示的需求仍然是结构材料商业化的重大障碍。在这项工作中，我们以离子染色纤维素为基材，采用凝胶辅助和热压方法生产离子染色冷却纤维素散装。实验结果表明，其弯曲强度达到111 MPa，冲击韧性达到79.8 kJ·m。在提供多种颜色的同时，它表现出出色的辐射冷却性能。在太阳辐射强烈的日子里，三种不同颜色的离子染色冷却纤维素块可实现 2.2–3.9 °C 的温度降低。此外，制备工艺简单，成本低廉，有利于产业化。该研究为彩色木基辐射冷却材料的开发和设计提供了实践和理论基础。