化工学报2015，Vol.66Issue(12)：5142-5148,7.DOI:10.11949/j.issn.0438-1157.20150687
三水醋酸钠/甲酰胺复合相变材料的制备及性能
Preparation and performance of sodium acetate trihydrate/formamide composite phase change material
摘要
Abstract
Formamide (FA) as modifier, a novel sodium acetate trihydrate (SAT)/formamide (FM) composite phase change material (CPCM) was prepared by melt blending method. The influence of the formamide mass fraction (the same as below) on the phase change enthalpy and the temperature of SAT/FA mixture (matrix) was discussed. The effects of nucleating agent and thickening agent on the phase separation, the degree of supercooling and the release time of composite material were systematically investigated by melting-solidification cycle and step cooling curve. The structure and performance of novel CPCM were characterized by FTIR, XRD and DSC. The results showed that the SAT/FA eutectic mixture formed by adding 25% formamide into SAT. The SAT/FA CPCM formed by adding 2% disodium hydrogen phosphate dodecahydrate (DSP) as the nuclear agent and 2% polyvinyl alcohol (PVA) as thickening agent, had a low degree of supercooling (2.67℃), long heat release time (10170 s) and excellent cycling stability. Its phase change enthalpy and temperature were 233.9 kJ·kg-1 and 40.88℃, respectively, indicating that it can be applied to floor radiant heating with phase change thermal storage.关键词
三水醋酸钠/甲酰胺复合相变材料/低共融体/相变焓/过冷度/循环稳定性Key words
sodium acetate trihydrate/formamidecomposite phase change material/eutectic/phase change enthalpy/surpercooling degree/cycling stability分类
化学化工引用本文复制引用
方玉堂,金策,梁向晖,高学农,张正国..三水醋酸钠/甲酰胺复合相变材料的制备及性能[J].化工学报,2015,66(12):5142-5148,7.基金项目
国家自然科学基金项目(21276089,21471059). supported by the National Natural Science Foundation of China (21276089, 21471059). （21276089,21471059）
