温室多壁碳纳米管芒硝基相变材料储能性能

发布时间：2018-08-04 17:28

【摘要】：该文对比不同温度下强酸处理多壁碳纳米管(multi-walled carbon nanotubes,MWCNTs)对其表面结构改性,并以物理分散制备出含MWCNTs的十水硫酸钠基复合相变储能材料。探讨不同酸化温度下MWCNTs对十水硫酸钠基复合相变储能材料的过冷和相分层影响。并对其比热,导热系数及相变潜热特征进行分析。结果表明:酸化处理后MWCNTs产生羧基;添加质量分数1%的120℃酸化后的MWCNTs的A、B两种十水硫酸钠基复合相变储能材料过冷度降低最大;添加酸化处理后的MWCNTs的十水硫酸钠基复合相变储能材料相容性较好;含120℃酸化后的1%的MWCNTs的A、B两种十水硫酸钠基复合相变储能材料比热及导热系数在相变温度点附近都达到最大,分别为5.095 mm2/s和0.932 5 w/mk、4.235 6 mm2/s和0.941 3 w/mk;含质量分数1%的120℃酸化处理的MWCNTs的B类复合相变储能材料较A类的潜热值大,其分别为143.6 J/g,97.42 J/g;该试验表明含1%MWCNTs-B相变储能材料更适合应用于温室。
[Abstract]:In this paper, the surface structure of multi-walled carbon nanotubes treated with strong acid at different temperatures was compared, and the composite phase change energy storage materials containing MWCNTs were prepared by physical dispersion. The effects of MWCNTs on supercooling and phase stratification of composite phase change energy storage materials based on sodium sulfate decahydrate at different acidification temperatures were investigated. The specific heat, thermal conductivity and latent heat characteristics of phase change are analyzed. The results showed that carboxyl group was produced in MWCNTs after acidification treatment, and the supercooling degree of two kinds of MWCNTs composite phase change energy storage materials with sodium sulfate decahydrate after acidizing at 120 鈩，

本文编号：2164590