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Qijing Guo, Cong Guo, Hao Yi, Feifei Jia, and Shaoxian Song, Vertically aligned montmorillonite aerogel–encapsulated polyethylene glycol with directional heat transfer paths for efficient solar thermal energy harvesting and storage, Int. J. Miner. Metall. Mater.,(2024). https://doi.org/10.1007/s12613-023-2794-3
Cite this article as:
Qijing Guo, Cong Guo, Hao Yi, Feifei Jia, and Shaoxian Song, Vertically aligned montmorillonite aerogel–encapsulated polyethylene glycol with directional heat transfer paths for efficient solar thermal energy harvesting and storage, Int. J. Miner. Metall. Mater.,(2024). https://doi.org/10.1007/s12613-023-2794-3
引用本文 PDF XML SpringerLink

竖直多孔定向传热型蒙脱石凝胶封装聚乙二醇用于高效太阳热能收集与储存


  • 通讯作者:

    易浩    E-mail: yihao287@whut.edu.cn

    宋少先    E-mail: ssx821215@whut.edu.cn

文章亮点

  • (1) 设计构建了新型垂直多孔的定向传热型复合相变材料
  • (2) 开发的3D–Mt/PEG形状稳定性能、热性能、循环性能优异,潜热高达167.53 J/g
  • (3) 三维蒙脱石凝胶支撑材料提升了复合相变材料的阻燃性能
  • 利用相变材料(PCM)转换和存储光热能是利用清洁和可持续太阳能的最佳途径之一。本研究采用真空浸渍技术将聚乙二醇(PEG)封装至蒙脱石(Mt)气凝胶(3D-Mt)中,制备新型的3D-Mt/PEG复合相变材料。3D-Mt作为封装材料可以有效防止PEG泄漏,并充当阻燃屏障以降低PEG的可燃性。3D-Mt/PEG具有优异的形状稳定性、热稳定性和化学稳定性,其相变焓高达167.53 J/g,即使经过50次加热–冷却循环后仍可保持稳定。此外,3D-Mt的垂直多孔结构为定向热传输提供了通道,促进了有效的热传导,可实现快速的热响应和高效的热管理性能。本研究成功开发了具有较高机械强度、优异阻燃性和定向传热功能的3D-Mt/PEG复合相变材料,解决了相变材料的泄漏和阻燃性差的问题,为制备高性能复合相变材料提供了一种新的设计策略,在热管理和光热转换应用领域具有重大应用潜力。
  • arch Article

    Vertically aligned montmorillonite aerogel–encapsulated polyethylene glycol with directional heat transfer paths for efficient solar thermal energy harvesting and storage

    + Author Affiliations
    • The conversion and storage of photothermal energy using phase change materials (PCMs) represent an optimal approach for harnessing clean and sustainable solar energy. Herein, we encapsulated polyethylene glycol (PEG) in montmorillonite aerogels (3D-Mt) through vacuum impregnation to prepare 3D-Mt/PEG composite PCMs. When used as a support matrix, 3D-Mt can effectively prevent PEG leakage and act as a flame-retardant barrier to reduce the flammability of PEG. Simultaneously, 3D-Mt/PEG demonstrates outstanding shape retention, increased thermal energy storage density, and commendable thermal and chemical stability. The phase transition enthalpy of 3D-Mt/PEG can reach 167.53 J/g and remains stable even after 50 heating–cooling cycles. Furthermore, the vertical sheet-like structure of 3D-Mt establishes directional heat transport channels, facilitating efficient phonon transfer. This configuration results in highly anisotropic thermal conductivities that ensure swift thermal responses and efficient heat conduction. This study addresses the shortcomings of PCMs, including the issues of leakage and inadequate flame retardancy. It achieves the development and design of 3D-Mt/PEG with ultrahigh strength, superior flame retardancy, and directional heat transfer. Therefore, this work offers a design strategy for the preparation of high-performance composite PCMs. The 3D-Mt/PEG with vertically aligned and well-ordered array structure developed in this research shows great potential for thermal management and photothermal conversion applications.
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