高等学校化学学报

高等学校化学学报

• 物理化学 • 上一篇    下一篇

三元脂肪酸/膨胀石墨复合相变材料的制备、包覆定形及热性能

孟新1, 张焕芝2, 赵梓名2, 孙立贤2, 徐芬1, 张箭2, 焦庆祝1, 鲍艳3, 马建中3   

  1. 1. 辽宁师范大学化学化工学院, 大连 116029;
    2. 中国科学院大连化学物理研究所, 洁净能源国家实验室, 材料与热化学实验室, 大连 116023;
    3. 陕西科技大学资源与环境学院, 西安 710021
  • 收稿日期:2011-09-13 发布日期:2012-02-16
  • 通讯作者: 孙立贤, 男, 博士, 研究员, 博士生导师, 主要从事热化学和储氢研究.
    徐 芬, 女, 博士, 教授, 主要从事热化学和能源材料研究. E-mail:lxsun@dicp.ac.cn; xufen@lnnu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 20833009, 20903095, 51102230, 51071146, 51071081 和 U0734005)资助.

Preparation, Encapsulation and Thermal Properties of Fatty Acid/Expanded Graphite Composites as Shape-stabilized Phase Change Materials

MENG Xin1, ZHANG Huan-Zhi2, ZHAO Zi-Ming2, SUN Li-Xian2, XU Fen1, ZHANG Jian2, JIAO Qing-Zhu1, BAO Yan3, MA Jian-Zhong3   

  1. 1. College of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China;
    2. National Laboratory of Clean Energy, Materials and Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;
    3. College of Resources and Environment, Shaanxi University of Science and Technology, Xi'an 710021, China
  • Received:2011-09-13 Published:2012-02-16

PDF (PC)

被引次数

50

摘要：

采用癸酸、 月桂酸和棕榈酸的三元共晶混合物作为相变材料, 以膨胀石墨为基体, 通过膨胀石墨多孔结构的毛细吸附和复合涂饰剂的包覆定形, 将多元相变材料固定在膨胀石墨的孔道结构中, 制备出结构稳定、 密封性能优异、 热稳定性好和高导热的新型三元脂肪酸/膨胀石墨复合定形相变材料. 膨胀石墨具有膨胀疏松的多孔结构和良好的吸附性能; 其熔融潜热为95.6 J/g, 结晶焓为82.8 J/g, 说明其具有很好的相变蓄热特性和热循环稳定性; 材料的导热性能可增加至0.738 W/(m·K), 与脂肪酸相比得到大幅度提高.

关键词: 膨胀石墨, 脂肪酸, 定型相变材料, 包覆, 热性能

Abstract:

Fatty acid/expanded graphite composites as shape-stabilized phase change materials were prepared through infiltration method by the eutectic mixture of capric acid(CA), lauric acid(LA) and palmitic acid(PA) as phase change materials, expanded graphite(EG) as skeleton, and the coating compound as membrane. N2 adsorption curve and SEM images of expanded graphite and the composites indicate that expanded graphite has a loose porous structure and the eutectic mixture is effectively absorbed into its porous structure. DSC thermograms and thermal performance test show that the composites possess good phase change behavior and thermal cycling stability. The thermal conductivity of the composite material is significantly improved due to the highly thermal conductive expanded graphite.

Key words: Expanded graphite, Fatty acid, Shape-stabilized phase change material, Encapsulation, Thermal property

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