Preparation and performance of lauric acid-expanded graphite composite phase change materials

doi:10.11949/j.issn.0438-1157.20141134

Abstract

Abstract: The lauric acid-expanded graphite (LA/EG) composite phase change materials was prepared by using adsorption properties of porous graphite with lauric acid as phase change material, porous expanded graphite(EG) as the skeleton carrier; and through the experiment of the basic properties of shape stabilized phase change material, surface morphology, durability were studied. The results showed that lauric acid was effectively encapsulated within the pores of the expanded graphite; phase change temperature and latent heat of LA/EG was 45.45℃and 125.30 J·g^-1 respectively when m_LA:m_EG=95:5. LA/EG loss rate was very small after 100 times of hot and cold cycle phase transitions, which indicated that LA/EG has good stability in practice.

Key words: lauric acid, expanded graphite, stability, durability

摘要： 以月桂酸为相变材料, 多孔石墨为骨架基体, 利用多孔石墨的物理吸附特性, 制备月桂酸-膨胀石墨定形复合相变材料。并通过实验对定形复合相变材料的基本性能、表面形貌及耐久性进行了研究。结果表明, 月桂酸被有效地包封在膨胀石墨的孔隙内;m_月桂酸:m_膨胀石墨=95:5时定形复合相变材料的相变温度45.45℃, 相变潜热125.30 J·g^-1;经100次冷热相变循环后, 复合相变材料损失量非常少, 表明月桂酸-膨胀石墨复合相变材料在实践中有良好的稳定性。

关键词: 月桂酸, 膨胀石墨, 稳定性, 耐久性

CLC Number:

TB34
TU551

HUANG Xue, CUI Yingde, YIN Guoqiang, FENG Guangzhu, WU Zimin. Preparation and performance of lauric acid-expanded graphite composite phase change materials[J]. , 2015, 66(S1): 370-374.

黄雪, 崔英德, 尹国强, 冯光炷, 吴梓敏. 月桂酸-膨胀石墨复合相变材料的制备及性能[J]. CIESC Journal, 2015, 66(S1): 370-374.

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