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为有效地控制脂肪酸贮能材料的相变过程,利用差示扫描量热法(DSC)研究了癸酸(CA)-肉豆蔻酸(MA)-硬脂酸(SA)、CA-MA-棕榈酸(PA)、CA-PA-SA三元低共熔物体系的热力学性能,确定最低共熔混合物的组成、相变温度和相变潜热。运用Kissinger动力学方法计算CP-MA-SA、CP-MA-PA、CP-PA-SA三元低共熔混合物固-液相变过程的相变活化能及反应级数。结果表明:活化能为257.46~353.40kJ/mol,反应级数为1左右,动力学参数为脂肪酸三元体系在民用建筑的应用提供了重要依据。
In order to effectively control the phase transition of fatty acid storage materials, the effects of decanoic acid (CA) -myristic acid (MA) -stearic acid (SA), CA-MA- Acid (PA), CA-PA-SA ternary eutectic system to determine the composition of the lowest eutectic mixture, phase transition temperature and latent heat of transformation. The Kissinger kinetic method was used to calculate the phase transformation activation energy and reaction order of the solid-liquid phase transition of CP-MA-SA, CP-MA-PA and CP-PA-SA ternary eutectic mixtures. The results showed that the activation energy was 257.46 ~ 353.40 kJ / mol and the order of reaction was about 1. The kinetic parameters provided an important basis for the application of fatty acid ternary system in civil buildings.