石蜡/膨胀石墨定形相变材料的性能

被引：105

作者：

胡小冬

高学农

李得伦

陈思婷

机构：

[1] 华南理工大学化学与化工学院,传热强化与过程节能教育部重点实验室

来源：

化工学报 | 2013年 / 64卷 / 10期

关键词：

石蜡; 膨胀石墨; 物理吸附法; 定形相变材料;

D O I：

暂无

中图分类号：

TB34 [功能材料];

学科分类号：

080906 [电磁信息功能材料与结构];

摘要：

以石蜡为相变材料,利用膨胀石墨多孔网络结构,通过物理吸附法制备出石蜡/膨胀石墨复合相变材料,并通过模压法制成定形相变材料板块。采用差示扫描量热分析仪(DSC)、扫描电子显微镜(SEM)、偏光显微镜(POM)和Hot Disk热常数分析仪等对复合相变材料进行了结构和性能的表征与测量,建立了冷/热循环实验系统以分析材料的蓄/放热性能等。结果表明:石蜡质量分数为80%的定形相变材料相变温度为27.27℃,相变焓为156.6kJ·kg-1。制备的定形相变材料具有相变过程形状稳定、热导率高、储热密度大等特点,并具有良好的稳定性和较长的使用寿命。

引用

页码：3831 / 3837

页数：7

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