相变材料（PCMs）/膨胀石墨（EG）复合材料的结构分析及其在湿热条件下的热行为

Structural Analysis of Phase Change Materials (PCMs)/Expanded Graphite (EG) Composites and Their Thermal Behavior under Hot and Humid Conditions.

作者信息

Yang Kai, Zhang Xiuling, Venkataraman Mohanapriya, Wiener Jakub, Palanisamy Sundaramoorthy, Sozcu Sebnem, Tan Xiaodong, Kremenakova Dana, Zhu Guocheng, Yao Juming, Militky Jiri

机构信息

Department of Material Engineering, Faculty of Textile Engineering, Technical University of Liberec, Studentska 1402/2, Liberec, Czech Republic.

College of Textiles and Engineering, Zhejiang Sci-tech University, Second Avenue, Xiasha Higher Education Zone, Hangzhou, P.R. China.

出版信息

Chempluschem. 2023 Apr;88(4):e202300081. doi: 10.1002/cplu.202300081.

DOI:10.1002/cplu.202300081

PMID:36951444

Abstract

Expanded graphite (EG) has been used to store phase change materials (PCM) to enhance thermal conductivity and avoid leakage. However, systematic investigation on physical structure of various embedded PCMs in EG is not reported. Besides, the effect of environment on thermal behavior of PCM/EG composites has not been investigated yet. In this work, three common PCMs (including myristic acid (MA), polyethylene glycol (PEG) and paraffin wax (PW)) were embedded in EG and three PCM/EG composites were obtained. As a result, capillary force between EG and PCMs supported encapsulation of PCMs in EG. PCM/EG composites had narrower phase change range while supercooling degree values were different when various PCMs were used. Besides, the hot and humid environment had a side effect on thermal energy storage of PCMs and PCM/EG composites. The inherent hydrophilicity of PCMs was essential for resistance against side effect of moisture on thermal energy storage.

摘要

膨胀石墨（EG）已被用于储存相变材料（PCM），以提高热导率并避免泄漏。然而，尚未见有关于EG中各种嵌入相变材料物理结构的系统研究报道。此外，环境对PCM/EG复合材料热行为的影响也尚未得到研究。在本工作中，将三种常见的相变材料（包括肉豆蔻酸（MA）、聚乙二醇（PEG）和石蜡（PW））嵌入EG中，得到了三种PCM/EG复合材料。结果表明，EG与相变材料之间的毛细作用力有助于将相变材料封装在EG中。PCM/EG复合材料的相变范围较窄，而使用不同相变材料时过冷度值有所不同。此外，高温高湿环境对相变材料和PCM/EG复合材料的热能存储有负面影响。相变材料固有的亲水性对于抵抗水分对热能存储的负面影响至关重要。