摘要
配制了甲酸钠/氧化铜复合相变材料。通过恒温槽实验对比了甲酸钠,乙酸钠,丙酸钠以及氯化铵的性能,选择了性能最优的甲酸钠。通过配制不同浓度的甲酸钠溶液,对比其性能,发现29.4 wt%甲酸钠溶液的效果最好。为了优化溶液的导热性能,通过对比不同纯金属纳米材料和金属氧化物纳米材料的种类以及对比添加同种纳米材料不同的质量分数,发现添加0.5 wt%的氧化铜效果最优。通过Hot Disk和DSC实验对配方进行了导热值以及潜热值的测量,结果显示添加了纳米材料的配方其潜热为250.4 J/g,相变温度为-16℃,导热系数为1.078 W/(m·K),比未添加的导热能力提高了9.66%。实验过程中未发生化学沉降等现象。
Nano-copper oxide/sodium formate composites as phase change material were prepared. Sodium formate（HCOONa ·2H2O）was selected as a phase change material by comparing its cooling curve with sodium acetate（CH3COONa）,sodium propionate（C2H5COONa）and ammonium chloride（NH4Cl）solutions. Experimental resultsshowed that sodium formate solutions with mass fraction of 29.4 wt% performed best. Nano-copper oxide（nanoCu O）was chosen to improve the thermal conductivity of the composites among different kinds of nano-metals andnano-metal oxides. An ultrasonic oscillation device was used to make the nanoparticle solution. The results alsoshowed that the sodium formate with 0.5 wt% nano-copper oxide was optimal. Thermal performances of the compos-ites were investigated by a differential scanning calorimetry and a thermal constant analyzer. The results showedthat the latent heat of phase change of the composites was 250.4 J/g and phase change temperature was-16 ℃.Thermal conductivity of the composite with 0.5 wt% nano-copper oxide was 1.078 W（/m·K）,increased by 9.66%compared with 0.983 W（/m·K）of pure sodium formate solution. Chemical degradation of the nano-copper oxide/sodium formate composites didn＇t occur.
出处
《传感技术学报》
CAS
CSCD
北大核心
2016年第9期1351-1355,共5页
Chinese Journal of Sensors and Actuators
基金
"十二五"农村领域国家科技支撑计划课题项目(2013BAD19B01)
关键词
复合相变材料
甲酸钠
纳米氧化铜
相变温度
导热系数
composite phase change materials
sodium formate
nano-copper oxide
phase change temperature
thermal conductivity
