生物启发的分层辐射相变混合冷却复合材料,具有创纪录的冷却功率
Xinpeng Hu1, Bingqing Quan1, Zhanjin Shi1
1Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure and Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. China.
研究人员开发了一种新的混合冷却材料,灵感来自和珍珠. 这种被动日间辐射冷却 (PDRC) 复合材料实现了创纪录的冷却功率,为减少能源消耗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:
- 无源日间辐射冷却 (PDRC) 是一种可持续的技术,可减少冷却能源需求和排放.
- 传统的PDRC材料具有有限的冷却功率,不足以满足现代需求.
- 整合相变材料 (PCM) 提高了冷却能力,但在平衡辐射,潜热和传热特性方面面临挑战.
研究的目的:
- 开发一种高性能辐射相变混合冷却 (RPHC) 复合材料.
- 克服传统PDRC和集成PCM系统的局限性.
- 为提高冷却性能,创建一种以自然结构为灵感的材料.
主要方法:
- 采用了水预移除策略来创建分层微结构的RPHC复合材料.
- 该复合材料集成了微纤维化纤维素 (MFC) 基质与核心外相变囊 (PCC).
- 纳克尔珠光散射机制启发了该材料的设计.
主要成果:
- 开发的复合材料实现了高太阳反射率 (0.969) 和中红外辐射率 (0.958).
- 通过高效的PCC集成,实现了高潜热 (132.1 J g-1).
- 证明了创纪录的RPHC冷却功率为226W m-2和10.1°C的环境下温度降低.
结论:
- 与现有的PDRC材料相比,以珠为灵感的MFC/PCC复合材料提供了优越的冷却性能.
- 对建筑物外的应用显示,可降低高达4.4%的冷却能耗.
- 这种创新材料有助于节能和碳中和目标,并有可能减少全球二氧化碳排放.
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