中文摘要：

以石蜡为相变材料、膨胀石墨为支撑结构制备复合相变材料（CPCM）,采用差示扫描量热仪、傅里叶红外光谱仪、导热系数测试仪和RC-4温度测试仪,研究了CPCM的性质及其对磷酸镁水泥（MPC）水化产物、导热性以及水化热的影响规律。实验表明,与石蜡相比,CPCM的相变温度、相变焓略有降低,颗粒粒径减小,分散性提高,导热性能增强;CPCM是石蜡和膨胀石墨的物理复合,没有新物质生成,具有相变材料良好的热性能,通过CPCM相变,吸收MPC水化放出的热量,使得水化体系温度降低,MPC水化反应速度减慢;CPCM加入MPC后,CPCM相变控温范围无明显变化,MPC导热系数略有减小,MPC水化产物无明显变化,吸热峰温度略有升高,热稳定性提高。

英文摘要：

The composite phase change material（CPCM）was prepared by using paraffin as phase change material and expanded graphite as the supporting structure.Differential scanning calorimeter,Fu Li ye infrared spectrometer,thermal conductivity coefficient tester and RH-4temperature test instrument are used.The properties of CPCM and its effect on the hydration products,thermal conductivity and hydration heat of magnesium phosphate cement（MPC）were studied.Test shows：compared with paraffin,the phase change temperature and phase change enthalpy of CPCM decreased,the particle size decreased,the dispersion increased,and the thermal conductivity was enhanced.CPCM was a physical complex of paraffin and expanded graphite,which has no new material and has good thermal properties of phase change materials.By phase transformation of CPCM,the hydration heat of MPC was absorbed,and the hydration system temperature was decreased,and the reaction rate of MPC was slowed down.After the addition of CPCM,the temperature range of CPCM phase changing was not obvious,The thermal conductivity of MPC was slightly decreased,and there was no obvious change of MPC hydration products,the temperature of the heat absorption peak was slightly increased,and the thermal stability was improved.