Effects of MWNTs on phase change enthalpy and thermal conductivity of a solid-liquid organic PCM

被引：117

作者：

Zeng, J. L. ^{[1
,2
]}

Cao, Z. ^{[1
]}

Yang, D. W. ^{[1
]}

Xu, F. ^{[2
]}

Sun, L. X. ^{[2
]}

Zhang, X. F. ^{[1
]}

Zhang, L. ^{[1
]}

机构：

[1] Changsha Univ Sci & Technol, Sch Chem & Environm Engn, Changsha 410076, Hunan, Peoples R China

[2] Chinese Acad Sci, Dalian Inst Chem Phys, Mat & Thermochem Lab, Dalian 116023, Peoples R China

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2009年 / 95卷 / 02期

关键词：

multi-walled carbon nanotubes; phase change enthalpy; solid-liquid phase change materials; thermal conductivity; ENERGY-STORAGE; HEAT; ENHANCEMENT; TECHNOLOGIES; COMPOSITE; SYSTEM;

D O I：

10.1007/s10973-008-9275-9

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The effects of multi-walled carbon nanotubes (MWNTs) on the phase change enthalpy (Delta H) and the thermal conductivity (kappa) of a solid-liquid phase change materials (PCM), palmitic acid (PA), have been investigated. The results showed that both the Delta H and the kappa of the composite were lower than that of PA when the loading of MWNTs was small. As the concentration of MWNTs in the composites increased, the Delta H of the composites was slightly improved and then decreased linearly. However, the kappa of the composites was monotonously increased from the minimum value. When the loading of MWNTs increased to 5% and no surfactant was added, the kappa of the composite was enhanced to be 26% higher than that of PA. The kappa of the composite could be enhanced by CTAB instead of SDBS when the loading of MWNTs was small, as SDBS showed no obvious effect on the kappa of the composites. Furthermore, the effects of surface modification of MWNTs on the Delta H and the kappa of the composites have also been investigated.

引用

页码：507 / 512

页数：6

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