石蜡-碳纳米管复合材料的热物性研究  

Experimental Study of Thermo-physical Properties of Paraffin-Carbon Nanotubes Composite Materials

作　　者：吴学红[1] 王春煦[1] 高茂条 李伟平[1] 

机构地区：[1]郑州轻工业学院能源与动力工程学院,郑州450002

出　　处：《工程热物理学报》2017年第5期1071-1076,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51476149);河南省杰出青年基金项目(No.154100510014);河南省教育厅创新才团队项目(No.17IRTSTHN029)

摘　　要：为提高石蜡作为相变蓄冷材料的导热性能,制备了碳纳米管添加量分别为0%、1%、2%、3%、4%、5%的石蜡-碳纳米管复合材料,并对其热物性及稳定性进行实验研究。结果表明,随着碳纳米管添加量的增加,复合材料的相变温度基本不变,相变潜热逐渐减小,导热系数逐渐增大。在添加量为5%时,复合材料的融化和凝固相变潜热分别为128.2 J/g和134.4 J/g,比纯石蜡相对减小了15.5%和13.8%;固态和液态导热系数分别为0.487 W/(m·K)和0.516 W/(m·K),比纯石蜡相对提高了39.5%和40.3%,同时具有较好的循环稳定性。In order to improve the thermal conductivity of paraffin which is regarded as cool storage of phase change material, six kinds of paraffin-carbon nanotubes composite phase change materials are prepared by adding different mass fractions of carbon nanotube into paraffin （0%, 1%, 2%, 3%, 4% and 5%）, and their thermo-physical properties and stability are tested. The results show that, with the increasing of carbon nanotubes, the phase transition temperature of composite phase change materials remains the same, phase change latent heat dwindles and thermal conductivity gradually increases. Compared with the pure paraffin, when the mass fraction of carbon nanotube is 5%, the melting and solidifying of phase change latent heat of composite phase change materials are 128.2 J/g and 134.4 J/g which reduce by 15.5% and 13.8%, respectively; the thermal conductivity of the solid and liquid are 0.487 W/（m·K） and 0.516 W/（m·K） which increase 39.5% and 40.3%, respectively; Furthermore, it has good cycling stability.

关 键 词：石蜡 碳纳米管 蓄冷材料 相变潜热 导热系数 

分 类 号：TK124[动力工程及工程热物理—工程热物理]