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Thermal conductivity modification of n-octanoic acid-myristic acid composite phase change material

文献类型： 外文期刊

作者： Wang, Yinghui 1 ; Zhang, Xuelai 1 ; Ji, Jun 1 ; Li, Yuyang 1 ; Munyalo, Jotham Muthoka 1 ; Liu, Biao 1 ; Xu, Xiaofeng; 1 ;

作者机构： 1.Shanghai Maritime Univ, Cool Storage Technol Inst, Shanghai 201306, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Vegetable Res Ctr, Beijing 100097, Peoples R China

关键词： Composite organic PCMs; Expanded graphite; Carbon nanotubes; Thermal conductivity modification; Thermal properties

期刊名称：JOURNAL OF MOLECULAR LIQUIDS （ 影响因子：6.165； 五年影响因子：5.642 ）

ISSN： 0167-7322

年卷期： 2019 年 288 卷

页码：

收录情况： SCI

摘要： Considering the low thermal conductivity of organic phase change materials (PCMs), a modification of Octanoic acid (OA) and Myristic acid (MA) binary mixture with a mass ratio of 87:13 was studied. The influence of expanded graphite (EG) and Hydroxylated multi-walled carbon nanotubes (MWCNTs) on the thermal conductivity of OA-MA were compared and analyzed. The morphology of these two nanoparticals and OA-MA/EG PCM were measured by scanning electronic microscope (SEM). 7 wt% EG was finally selected as the additive to modify the thermal conductivity of OA-MA. By differential scanning calorimeter (DSC), the phase transition temperature was measured to be 6.8 degrees C and the enthalpy of fusion was 136.3 J/g. The thermal conductivity of OA-MA/EG was 0.9975 W/(m.K) tested by Hot Disk, which remarkably increased by 235.75% compared with the thermal conductivity of OA-MA. Undergoing 100 freeze-thaw cycles, the properties of the OA-MA/EG did not change significantly, which shows the composite PCM is especially suitable for its application in pharmaceutical refrigerated transport system. (C) 2019 Published by Elsevier B.V.

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