Enhancement of thermal conductivity by the introduction of carbon nanotubes as a filler in paraffin/expanded perlite form-stable phase-change materials

被引：154
|
作者：
Zhang, Xiaoguang [1 ]
Wen, Ruilong [1 ]
Huang, Zhaohui [1 ]
Tang, Chao [1 ]
Huang, Yaoting [2 ]
Liu, Yangai [1 ]
Fang, Minghao [1 ]
Wu, Xiaowen [1 ]
Min, Xin [1 ]
Xu, Youguo [1 ]
机构：
[1] China Univ Geosci, Sch Mat Sci & Technol, Beijing Key Lab Mat Utilizat Nonmetall Minerals &, Natl Lab Mineral Mat, Beijing 100083, Peoples R China
[2] Beijing Univ Posts & Telecommun, Sch Sci, Beijing 100876, Peoples R China
来源：
ENERGY AND BUILDINGS | 2017年 / 149卷
关键词：
Expanded perlite; Paraffin; Carbon nanotubes; Thermal conductivity; Phase change materials; ACID/EXPANDED PERLITE; COMPOSITE; VERMICULITE; GRAPHITE; BEHAVIOR;
D O I：
10.1016/j.enbuild.2017.05.037
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
In this study, the effect of the introduction of carbon nanotubes (CNTs) as a filler for enhancing the thermal conductivity of paraffin-carbon nanotubes/expanded perlite form-stable composite phase change materials (PA-CNTs/EP FS-CPCMs) was experimentally investigated. Four samples of PA-CNTs/EP FS-CPCMs with different CNT mass fractions were prepared by vacuum impregnation. Scanning electron microscopy was employed to investigate the morphology and microstructure of CNTs, EP, and PA-CNTs/EP FS-CPCMs. Differential scanning calorimetry was employed to examine the thermal properties of PA-CNTs/EP FS-CPCMs, and results indicated that the latent heat and phase-change temperatures of the PA-CNTs/EP FS-CPCMs slightly change with the CNTs mass fractions. The thermal conductivity of PA-CNTs/EP FS-CPCMs5.27 (0.516 W m(-1) K-1) was 4.82 times that of PA-CNTs/EP FS-CPCMsO. The thermal storage and release properties of PA-CNTs/EP FS-CPCMs were significantly improved as compared with those of PACNTs/EP FS-CPCMsO. Results obtained from Fourier transform infrared spectroscopy, thermogravimetric analysis, and thermal cycling tests showed that PA-CNTs/EP FS-CPCMs exhibit good chemical and thermal stabilities. The as-prepared PA-CNTs/EP FS-CPCMs demonstrate considerable potential as thermal energy storage materials. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：463 / 470
页数：8
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