中文摘要：

以工业石蜡为相变芯材,在硅烷偶联剂参与下,通过溶胶-凝胶法制备石蜡/SiO2 储能相变材料.并利用透射电子显微镜,热重分析,傅里叶红外光谱仪和方差扫描量热法等测试技术对石蜡/SiO2储能相变材料的结构和性能进行了测试和分析,最后利用瞬态热线法对石蜡/SiO2储能相变材料的导热系数进行了测试.结果表明,石蜡/SiO2储能相变材料的相变芯材石蜡在吸热熔化后不会渗漏;石蜡/SiO2储能相变材料中石蜡的含量约为39%时,相变温度和相变潜热分别为39.15℃和59.33J/g;石蜡/SiO2储能相变材料的导热系数为0.0845W/（m·K）,可作为一种良好的保温隔热建筑材料.

英文摘要：

Phase change material based on paraffin acting as the heat-absorbing material and nano SiO2 as the supportive material was prepared by sol-gel method,under the condition of using silane coupling agen.The morphology,chemical characteristics and thermal properties of paraffin/SiO2 compostie PCM were investigated by transmission electron microscopy,Fourier-transform infrared,thermo-gravimetric analysis,and different scanning calorimetry.Meanwhile,thermal conductivity coefficient of the paraffin/SiO2 compostie PCM was measured.The results indicated that the paraffin be immobilized in three-dimensional network structure during the process of phase change.The proportion of paraffin in the composite is 3 9% by mass,and the phase change temperature and latent heat were 39.15 ℃and 59.33 J/g,respectively.The thermal conductivity coefficient of the paraffin/SiO2 compostie PCM was 0.0845 W/(m·K).through the transient hot-wire method.Hence,the paraffin/SiO2 compostie PCM can be applied as the thermal insulation material.