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

被引：161

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

页码：463 / 470

页数：8

共 39 条

[1] Unusually high thermal conductivity of carbon nanotubes [J].