Enhanced thermal conductivity of composite phase change materials based on carbon modified expanded perlite

被引：40
作者：
Li, Runjie [1 ]
Zhao, Yajing [2 ]
Xia, Boyang [1 ]
Dong, Zhensheng [3 ]
Xue, Song [1 ]
Huo, Xiaotong [4 ]
Wu, Xiaowen [2 ]
Liu, Yan'gai [2 ]
Huang, Zhaohui [2 ]
Fang, Minghao [2 ]
Min, Xin [2 ]
Zhang, Xiaoguang [5 ]
机构：
[1] China Univ Geosci Beijing, Sch Sci, Beijing 100083, Peoples R China
[2] China Univ Geosci Beijing, Sch Mat Sci & Technol, Beijing Key Lab Mat Utilizat Nonmet Minerals & So, Natl Lab Mineral Mat, Beijing 100083, Peoples R China
[3] China Univ Geosci Beijing, Sch Engn & Technol, Beijing 100083, Peoples R China
[4] PetroChina Beijing Gas Pipeline Co Ltd, Beijing 100101, Peoples R China
[5] Peking Univ, Beijing Key Lab Magnetoelect Mat & Devices, Beijing Innovat Ctr Engn Sci & Adv Technol, Dept Mat Sci & Engn,Coll Engn, Beijing 100871, Peoples R China
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2021年 / 261卷
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
Carbon modified expanded perlite; Polyethylene glycol; Composite phase change materials; Thermal conductivity; Chemical stability;
D O I：
10.1016/j.matchemphys.2021.124226
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Phase change materials (PCMs) have attracted growing attention in clean energy storage fields. To improve the thermal conductivity of porous mineral-based composite PCMs (c-PCMs), pretreatment via in-situ carbonization is proposed to fill the pore structure with thermally conductive carbon. After vacuum impregnation, high-performance c-PCMs are obtained, comprising carbon-modified expanded perlite (EPC) and polyethylene glycol (PEG). The modified micro-pores optimize the heat transfer characteristic behaviors in c-PCMs and improve the adsorption stability of PEG. Thus, the load capacity of PEG reaches approximately 73.90 wt% in EPC/PEG cPCMs, providing excellent chemical and structural stability among perlite matrix, carbon modifier and PEG PCMs. The thermal conductivity of the EPC/PEG c-PCMs is 0.521 W/(m.K), which is almost 1.3 times that of the pristine PEG. These performances indicate that the EPC/PEG c-PCMs could be used as an environmentally friendly material for external wall heat-insulation application.
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收藏
页数：8
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