强大的双网络混合纤维素泡用于被动冷却
Aobo Geng1, Yanming Han1, Jingyun Cao1
1Research Institute of Wood Industry, Chinese Academy of Forestry, Key Laboratory of Wood Science and Technology, National Forestry and Grassland Administration, Beijing 100091, China.
International journal of biological macromolecules
|March 7, 2024
概括
研究人员开发了一种强大,环保的混合纤维素泡,用于被动辐射冷却. 这种材料在阳光下实现了显著的冷却,为节能和环境保护提供了可持续的解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 可持续能源 可持续能源
- 纳米技术 纳米技术
背景情况:
- 被动辐射冷却是环境保护和节能的关键零能源技术.
- 传统的辐射冷却材料在平衡机械强度和冷却性能方面面临挑战,阻碍了可扩展的生产.
研究的目的:
- 利用生物质开发一种强大而高效的被动辐射冷却材料.
- 为了提高机械性能和太阳散射,提高冷却性能.
主要方法:
- 通过使用西兰合剂与纤维素纳米纤维 (CNF) 和聚乙醇 (PVA) 进行交联,制造双网络混合纤维素泡.
- 纳米氧化 (ZnO) 和金属有机框架 (MOF) 的结合,以增强机械强度和太阳散射.
- 使用冷干燥工艺进行材料合成.
主要成果:
- 混合纤维素泡实现了高太阳反射率 (0.965) 和红外辐射率 (0.94).
- 该材料具有超高的机械强度和低的导热率.
- 在炎热的气候下,在阳光直射下,日间冷却效率达7.5°C.
结论:
- 开发的混合纤维素泡是一种用于户外热调节的高性能材料.
- 生物质衍生材料显示出热管理应用的巨大潜力.
- 这项工作为节能,环境保护和绿色建筑材料提供了可能性.
更多相关视频
09:20Microhoneycomb Monoliths Prepared by the Unidirectional Freeze-drying of Cellulose Nanofiber Based Sols: Method and Extensions
Published on: May 24, 2018
8.9K
09:22Casting Protocols for the Production of Open Cell Aluminum Foams by the Replication Technique and the Effect on Porosity
Published on: December 11, 2014
14.6K
相关概念视频
Thermal Insulation in Masonry Walls
124
In hot, dry climates, the thermal mass of masonry walls can be beneficial, absorbing heat during the day and releasing it at night, thereby stabilizing indoor temperatures. However, in most other climates, additional insulation is necessary to enhance thermal resistance.
External insulation can be applied using an Exterior Insulation and Finish System (EIFS), which involves affixing panels of plastic foam to the wall and covering them with a polymeric stucco reinforced with glass fiber mesh....
External insulation can be applied using an Exterior Insulation and Finish System (EIFS), which involves affixing panels of plastic foam to the wall and covering them with a polymeric stucco reinforced with glass fiber mesh....
124
Waterproofing and Anti-Bacterial Admixtures in Concrete
79
Concrete's susceptibility to water absorption is due to the capillary action within the pores of its hydrated cement paste. This action draws water in, creating the need for waterproofing admixtures to prevent such penetration. The efficacy of these admixtures is contingent upon the water pressure, with variations arising from different conditions such as rain, capillary rise, or hydrostatic pressure in structures intended to hold water.
Waterproofing admixtures render concrete hydrophobic,...
Waterproofing admixtures render concrete hydrophobic,...
79
