高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

海绵状氧化石墨烯/聚乙二醇复合相变材料制备和性能研究

蔡磊1，李立哲1，李昊2，蔡畅3，李铁虎2   

  1. 1. 西北工业大学自动化学院

    2. 西北工业大学材料学院

    3. 石家庄铁道大学信息科学与技术学院

  • 收稿日期:2025-02-09 修回日期:2025-06-04 网络首发:2025-06-06 发布日期:2025-06-06
  • 通讯作者: 李昊 E-mail:lihao@nwpu.edu.cn
  • 基金资助:
    国家自然科学基金(批准号：51872235, 52072302, 51802267)和河北省教育厅科学研究项目(批准号：QN2025669)资助

Preparation and Property Study of Sponge-Like Graphene Oxide/Polyethylene Glycol Composite Phase Change Materials

CAI Lei1, LI Lizhe1*, LI Hao2*, CAI Chang 3, LI Tiehu2   

  1. 1. Northwestern Polytechnical University, School of Automation

    2. Northwestern Polytechnical University, School of Materials Science and Engineering 3. Shijiazhuang Tiedao University, School of Information Science and Technology

  • Received:2025-02-09 Revised:2025-06-04 Online First:2025-06-06 Published:2025-06-06
  • Supported by:
    Supported by the National Natural Science Foundation of China (Nos. 51872235, 52072302, 51802267) and the Science Research Project of Hebei Education Department (No. QN2025669)

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摘要： 摘要 针对现有复合相变材料(Composite Phase Change Material, CPCM)中载体质量较大且导热性能不足的问题，本研究采用改进的Hummers方法制备了氧化石墨烯(Graphene Oxide, GO)胶体溶液，并通过冷冻干燥技术进一步制备成具有多孔结构的海绵状氧化石墨烯(Sponge-Like Graphene Oxide, SLGO)。利用SLGO作为载体，聚乙二醇(Polyethylene Glycol, PEG)作为相变介质，通过真空浸渍结合超声辅助工艺，制备了SLGO/PEG复合相变材料。采用紫外可见光谱(UV-vis spectrum)、扫描电镜(SEM)、傅里叶变换红外光谱(FTIR)、X 射线衍射(XRD)、差示扫描量热法(DSC)、激光导热等表征技术分析了复合相变材料的微观结构和热物理性能。研究结果表明，PEG在SLGO孔隙中的有效填充和片层吸附作用不仅显著增加了石墨烯层间距，并通过氢键与SLGO表面的含氧官能团形成了稳定的相互作用。复合相变材料具有超过179 J/g的高潜热值和172.7 J/g的结晶焓，相对焓效率均超过90%，这彰显了其优异的相变储能性能。尤为重要的是，SLGO的添加显著提升了材料的热导率，当SLGO的质量分数增至1%时，复合相变材料的热导率可达0.98 W·m?1·K?1。此外，随着SLGO含量的增加，复合相变材料的定形效果得到显著增强。

关键词: 复合相变材料, 海绵状氧化石墨烯, 聚乙二醇, 潜热值, 热导率

Abstract: Abstract In response to the issues of high carrier mass and insufficient thermal conductivity in existing composite phase change materials, this study prepared Graphene Oxide (GO) colloidal solution using an improved Hummers method and further fabricated them into Sponge-Like Graphene Oxide (SLGO) with a porous structure through freeze-drying technology. Utilizing SLGO as the carrier and Polyethylene Glycol (PEG) as the phase change medium, the SLGO/PEG composite phase change material was prepared by combining vacuum impregnation with ultrasonic-assisted processing. Characterization techniques such as Ultraviolet-Visible (UV-vis) spectroscopy, Scanning Electron Microscopy (SEM), Fourier-Transform Infrared (FTIR) spectroscopy, X-ray Diffraction (XRD), Differential Scanning Calorimetry (DSC), and laser thermal conductivity analysis were comprehensively applied to investigate the microstructure and thermo-physical properties of the composite phase change material. The results indicate that the effective filling of PEG in the SLGO pores and the adsorption on the layers not only significantly increased the interlayer spacing of graphene but also formed a stable interaction with the oxygen-containing functional groups on the SLGO surface through hydrogen bonding. The composite phase change materials demonstrated a high latent heat value of over 179 J·g?1 and a crystallization enthalpy of 172.7 J·g?1, with a crystallinity of over 90%, highlighting its excellent phase change energy storage performance. Most importantly, the addition of SLGO significantly enhanced the thermal conductivity of the material, reaching 0.98 W·m?1·K?1 when the mass fraction of SLGO was increased to 1%. Furthermore, the shape-stabilization effect of the composite phase change material was significantly strengthened with the increase in SLGO content.

Key words: Composite phase change material, Sponge-like graphene oxide, Polyethylene glycol, Latent heat value, Thermal conductivity

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