化工新型材料

化工新型材料 ›› 2019, Vol. 47 ›› Issue (5) : 127-130.

科学研究

低温复合相变材料正辛酸-癸酸的制备及性能分析

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Preparation and characterization of low temperature binary composite PCM N-caprylic acid and capric acid

Li Yuyang, Zhang Xuelai, Jotham Muthoka Munyalo, Wang Yinghui, Zhou Sunxi

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Received
2017-12-22
Issue Date	Revised Date
2019-06-17	2017-12-22

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摘要

将正辛酸(OA)与癸酸(CA)按比例混合制备二元复合相变材料OA-CA,用于相变温度2～8℃的医药冷藏运输系统中。首先通过理论计算预测了二元混合物的共晶点,确定它的共晶点比例、相变温度及潜热值,然后围绕共晶点比例配制6种不同比例的混合物。结果表明:OA-CA的过冷度为0.4℃、共晶点质量比为71∶29、相变温度为1.7℃、相变潜热为122.1J/g、热导率为0.3231W/(m·K)。对OA-CA低温复合相变材料进行100次循环蓄放冷实验,发现其相变温度、潜热值、热导率均未发生明显变化。

Abstract

The binary composite phase change material N-caprylic acid (OA) and Caprylic acid (CA) were mixed in proportion,for phase change temperature in 2～8℃ medical refrigerating transportation system.Firstly,the eutectic point of binary mixture was predicted by theoretical calculation,and the eutectic point ratio,phase change temperature and latent heat were determined.Then six kinds of different proportion of mixture around the eutectic point were made.The experimental results showed that the super-cooling degree of OA-CA was 0.4℃.At the eutectic point,the mass ratio was 71∶29 and the phase transition temperature was 1.7℃.The latent heat of fusion was found to be 122.1J/g and the thermal conductivity was 0.3231W/(m·K).It was found that the phase change temperature,latent heat,thermal conductivity of OA-CA composite phase change material were not significantly changed after 100 cycles of cold storage experiment.

关键词

二元混合物 / 相变材料 / 热性能 / 循环 / 稳定性

Key words

binary mixture / phase change material / thermal property / recycling / stability

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低温复合相变材料正辛酸-癸酸的制备及性能分析[J]. 化工新型材料, 2019, 47(5): 127-130 DOI:

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