通过熔融共混法制备了一系列十六酸-十四醇共晶系，利用步冷曲线法和低共熔混合物相变温度理论计算确定十六酸-十四醇二元混合物最低共熔点的质量比为18∶82，共晶温度为34.03℃，并且随着十六酸掺入量的增加，共晶系的过冷度逐渐下降。DSC和FT-IR测试结果表明，十六酸-十四醇最低共熔点的熔化温度为35.90℃，相变潜热为122.6 J/g，凝固温度为30.46℃，相变潜热为119.3 J/g，并且各组分之间无化学反应。从加速冷热循环结果来看，十六酸-十四醇共晶系具有良好的热稳定性。因此，该二元复合相变材料适用于建筑节能领域。

A series of hexadecane acid-tetradecanol eutectic systems are prepared by melt blending method.By means of the step cooling curve method and the eutectic mixture phase transition temperature theory,it is determined that the lowest eutectic point of binary mixture forms when the mass ratio of hexadecane acid to tetradecanol is 18:82 and the eutectic temperature is at 34.03℃.Meanwhile,the subcooling degree of the eutectic system gradually decreases with the increase of the amount of hexadecane acid.DSC and FT-IR test results show the melting temperature,phase change latent heat,solidification temperature and phase change latent heat of hexadecane acid-tetradecanol system at the lowest eutectic point are 35.90℃,122.6 J·g^-1,30.46℃ and 119.3 J·g^-1,respectively.There is no chemical reaction happened between the components.From the results of accelerated hot and cold cycle,the hexadecane acid-tetradecanol eutectic system has a good thermal stability.Therefore,this composite phase change material is suitable for energy conservation of buildings.