摘要
为了克服三水合醋酸钠(CH3COONa·3H2O)作为相变储热材料在相变过程中存在的相分离现象,提高其热循环性能,采用简单的共混法将正二十烷(n-Eicosane)、多孔材料膨胀石墨(EG)与CH3COONa·3H2O复合制备了三元相变体系(n-Eicosane-EG/CH3COONa·3H2O),利用XRD、SEM、DSC等方法研究了复合相变体系的结构和储热性能。结果表明,利用正二十烷的包覆作用和EG的孔限域作用,可使n-Eicosane-EG/CH3COONa·3H2O的热循环性能显著提高。
In order to overcome the drawback of phase separation in the process of phase change and improve the thermal cycling performances of sodium acetate trihydrate(CH3COONa·3H2O),new phase change materials composed of CH3COONa·3H2O,n-Eicosane and expanded graphite(EG)were prepared by a simple blending method.The structure and thermal properties of as-prepared samples were characterized by XRD,SEM and DSC techniques.The result indicates that the thermal cycling performance of n-Eisosane-EG/CH3COONa·3H2O is improved by the coated effect of n-Eicosane and confinement effect of EG.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2014年第3期824-829,共6页
Acta Materiae Compositae Sinica
基金
国家重大科学研究计划项目(2009CB939902
2012CBA01207)
国家自然科学基金(U1201241
51206009)
关键词
相变材料
三水合醋酸钠
正二十烷
膨胀石墨
热循环性能
phase change materials
sodium acetate trihydrate
n-Eicosane
expanded graphite
thermal cycling performance
