基于Pickering乳液法的石墨烯/PCM复合材料的制备与性能

doi:10.19936/j.cnki.2096-8000.20250928.001

摘要/Abstract

摘要： 石蜡(PA)作为典型的相变储能材料,存在易泄露、导热性能差等缺点,限制了其大规模市场化应用。针对此问题,以PA为基体相变材料,还原氧化石墨烯(RGO)为限域载体,通过一步水热法制备出固化的石蜡/石墨烯(PaGr)复合材料。在水热过程中,利用GO作为稳定剂配置Pickering乳液,实现了石蜡与石墨烯的有效复合。采用XPS和Raman光谱分析技术证实了GO在水热还原过程中成功转化为RGO,并借助光学显微镜、DSC及热循环测试,对所制PaGr复合相变材料的微观形貌、热物理性质、结构稳定性进行表征。实验结果证明,PaGr复合材料有效改善了PA液相泄露导致的形状不稳定性和高热阻性问题。较纯PA而言,其热导率和结构稳定性都有所提高,表明PaGr复合材料在PCM领域具有广阔的应用前景。

关键词: 相变材料, 石蜡, 氧化石墨烯, 储能技术, Pickering乳液, 导热性能, 复合材料

Abstract: As a typical phase change material (PCM) for energy storage, paraffin (PA) was found to possess shortcomings such as easy leakage and poor thermal conductivity, which had limited its large-scale market application. To address this issue, solidified paraffin/graphene (PaGr) composites were prepared by a one-step hydrothermal method, in which PA served as the matrix phase change material and reduced graphene oxide (RGO) acted as the confining carrier. During the hydrothermal process, the Pickering emulsion, configured with GO as a stabilizer, facilitated the effective recombination of paraffin and graphene. XPS and Raman spectroscopy were employed to confirm the successful conversion of GO into RGO during the hydrothermal reduction process. The microstructure, thermophysical properties, and structural stability of the PaGr composite PCM were characterized through optical microscopy, DSC, and thermal cycling. The experimental results show that PaGr composites can effectively improve the shape instability and high thermal resistance caused by PA liquid leakage. Compared with pure PA, its thermal conductivity and structural stability are improved, which indicates that PaGr composites have broad application prospects in the field of PCM.

Key words: phase change materials, paraffin, graphene oxide, energy storage technology, Pickering emulsion, thermal conductivity, composites

中图分类号:

TB332

卓晴, 王诗仪, 赵伟, 李明普, 王煜祺, 李媛媛, 李英儒. 基于Pickering乳液法的石墨烯/PCM复合材料的制备与性能[J]. 复合材料科学与工程, 2025, 0(9): 1-7.

ZHUO Qing, WANG Shiyi, ZHAO Wei, LI Mingpu, WANG Yuqi, LI Yuanyuan, LI Yingru. Preparation and properties of graphene/PCM composites based on Pickering emulsion method[J]. COMPOSITES SCIENCE AND ENGINEERING, 2025, 0(9): 1-7.

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