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碳纳米管-无机盐复合成核剂对MgCl2·6H2O-CaCl2·6H2O体系储热性能的影响
Effect of Carbon Nanotube-Inorganic Salt Composite Nucleating Agents on Thermal Properties of MgCl2·6H2O-CaCl2·6H2O System
【摘要】 以Mg Cl2·6H2O-Ca Cl2·6H2O为研究体系,探讨在诱导结晶成核过程中同时引入羟基化碳纳米管（CNTs）和Sr Cl2·6H2O-Sr CO3作为复合成核剂对体系储热性能的影响规律。结果表明,CNTs单独作为成核剂,可以使体系过冷度降低,并且随着CNTs加入量的增加,体系的过冷度逐渐减小;当CNTs和Sr Cl2·6H2O-Sr CO3作为复合成核剂同时引入时,可以进一步降低体系的过冷度,其中CNTs、Sr CO3和Sr Cl2·6H2O加入量分别为0.25%、1%和3%（质量分数）时,Mg Cl2·6H2O-Ca Cl2·6H2O体系的过冷度最小（约为0.6℃）。Mg Cl2·6H2O-Ca Cl2·6H2O相变材料过冷度减小是因为复合成核剂使体系具有较好的导热性能和较高的相变潜热。
【Abstract】 Effects of Sr Cl2·6H2O-Sr CO3 and hydroxylated carbon nanotubes（CNTs）as composite nucleating agents on the energy storage properties of Mg Cl2·6H2O-Ca Cl2·6H2O in the induced crystallization nucleation process were investigated.It is suggested that the addition of CNTs can reduce system supercooling degree（SSD）,which decreases with the increase of CNTs.When the composite nucleating agents composed of Sr Cl2·6H2O-Sr CO3 and CNTs are introduced,SSD can be further reduced due to its good thermal conductivity and high phase change latent heat.When the proportions of CNTs,Sr CO3 and Sr Cl2·6H2O are optimized to be 0.25 wt%,1 wt%and 3 wt%,respectively,the SSD decreases to a minimum of 0.6°C.
【Key words】 carbon nanotubes； composite-nucleating agent； phase change materials； supercooling degree；
- 【文献出处】 稀有金属材料与工程 ,Rare Metal Materials and Engineering , 编辑部邮箱 ,2018年S1期
- 【分类号】TB34
- 【被引频次】8
- 【下载频次】247