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微观结构的可持续辐射冷却调制 柔性聚酸乳酸薄膜

Mingfei Fan1, Yangzhe Hou1,2, Han Jia1

  • 1College of Materials Science and Engineering, State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450002, China.

Langmuir : the ACS journal of surfaces and colloids
|July 31, 2025
PubMed
概括

研究人员开发了一种灵活的聚酸薄膜,用于被动冷却. 这种聚合物微结构技术实现了显著的温度降低,为冷却应用提供了可持续的解决方案.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 纳米技术纳米技术
  • 光学是什么?光学是什么?光学是什么?

背景情况:

  • 为共振光散射优化聚合物微结构是被动冷却的关键.
  • 对辐射冷却材料的精确微观结构控制在技术上具有挑战性.

研究的目的:

  • 提出一种制造可调节微观结构的聚乙烯 (PLA) 辐射冷却膜的策略.
  • 研究微结构控制对光学性能和冷却性能的影响.

主要方法:

  • 使用聚乙烯糖醇 (PEG) 制造PLA薄膜,以控制表面孔隙和内部球形结构.
  • 描述电影的光学性能,冷却功率和机械性能.

主要成果:

  • 在820W·m-2太阳辐射下达到50.4W·m-2的冷却功率.
  • 经证实,白天和夜间平均温度分别降低了5.2°C和7.6°C.
  • 该薄膜具有3.84MPa的抗拉强度,在断裂时有32.1%的延伸,并且具有类似纸张的灵活性.

结论:

  • 开发的PLA膜通过受控的微观结构提供可调节的光学特性.
  • 这部电影显示了建筑和设备中被动冷却的巨大潜力.
  • 这代表了下一代灵活的辐射冷却解决方案的可持续方法.