目的 为了减少产品在运输过程中由于温度而造成的损坏，研发一种石蜡-正辛酸/石墨相变材料，并探究其性能。方法 主要通过热物性实验，包括差示扫描量热、TEMPOS热特性来分析石蜡-正辛酸/石墨相变材料的性能。结果 配置了6种不同质量比的石蜡和正辛酸，质量比为0.2∶0.8的石蜡-正辛酸达到共晶点，相变潜能为161.31 J/g，相变温度为13.4 ℃;以质量比0.2∶0.8的石蜡-正辛酸为原料，添加不同添加量的石墨来提高导热性能，发现当石墨质量分数为20%时，导热系数提高了3.9倍，且循环稳定性好。结论 从相变潜能、相变温度和导热系数等3个方面考虑，当质量分数为20%的石墨添加在质量比为0.2∶0.8的石蜡-正辛酸相变材料中，可得最佳石蜡-正辛酸/石墨相变材料，满足10~20 ℃运输环境的要求。

In order to reduce the damage caused by temperature during the transportation of the products, the paraffin-octanoic acid/graphite phase change material was prepared and its properties were investigated. Its performance was analyzed through thermophysical experiments, including differential scanning calorimetry and TEMPOS thermal characteristics, were used to analyze its performance. Six kinds of paraffin and octanoic acid with different mass ratios were prepared. The paraffin-n-octanoic acid with a mass ratio of 0.2∶0.8 reached the eutectic point, with a phase transition potential of 161.31 J/g and a phase transition temperature of 13.4 ℃. The thermal conductivity of paraffin-octanoic acid with a mass ratio of 0.2∶0.8 was improved by adding different contents of graphite. It was found that the thermal conductivity increased by 3.9 times and cycle stability became good when the graphite content was 20%. Considering three aspects such as phase transition potential, phase transition temperature and thermal conductivity, the conclusion is that the best paraffin-octanoic acid/graphite phase change material can be obtained by adding 20% graphite to the paraffin-octanoic acid/graphite phase change material with a mass ratio of 0.2∶0.8, which can meet the requirements of transportation environment of 10-20 ℃.