月桂酸-十四醇二元复合相变材料的相变特性  

PHASE TRANSITION PROPERTIES OF LA-TD BINARY COMPOSITE PHASE CHANGE MATERIALS

作　　者：蔡伟 孙志高[1] 马鸿凯 张爱军[1] 李成浩[1] 王茂[1] Cai Wei Sun Zhigao Li Chenghao Wang Mao(School of Environmental Science and Ma Hongkai, Zhang Aijun, Engineering, Suzhou University of Science and Technology, Suzhou 215009, China)

机构地区：[1]苏州科技大学环境科学与工程学院,苏州215009

出　　处：《太阳能学报》2017年第9期2493-2497,共5页Acta Energiae Solaris Sinica

基　　金：江苏省自然科学基金(BK2012602);苏州市建设局科技计划(SJ201315);苏州科技学院研究生创新项目(091420021)

摘　　要：为了获得适合在建筑领域应用的相变材料和相变温度,以月桂酸(LA)和十四醇(TD)为原料,采用熔融共混法制备一系列二元酸-醇相变材料。采用步冷曲线法测定不同组分二元相变材料的结晶温度,通过绘制的相图确定二元体系低共晶点,LA-TD二元体系在23.1℃达到共晶点;采用红外光谱(FTIR)表征复合相变材料的结构,表明复合相变材料中LA与TD通过分子间作用力结合在一起;采用DSC差示扫描量热法测量LA-TD混合物的相变温度及相变潜热,低共晶物的相变起始温度为24.46℃,相变潜热达到150.45 J/g,经300次0~60℃冷热循环后热稳定性良好。In order to obtain suitable phase change materials （PCMs） and phase transition temperature for energy storage in the field of construction, a series of organic composite phase change materials were prepared using melt blending method with the mixtures of louric acid （LA） and tetradecanol （TD）. The freezing points of LA-TD mixture were measured using the method of cooling curves. The eutectic point of LA-TD binary system was determined by phase diagram eutectie drawn according to the cooling curves. It was shown by cooling curves that LA-TD binary system achieved the point at about 23.1 ℃. The constructions of PCMs were characterized by FT-IR spectra. The mixture of LA-TD was mixed by molecular inter-atomic forces. The phase change temperature and latent heat of the mixture of LA-TD were measured using DSC. The starting phase change temperature and phase change latent heat of LA-TD were 24.46℃ and 150.45 J/g, respectively. Experimental results showed that the thermal stability of LA-TD eutectic mixture was good after high-low temperature cycling for 300 times between 0 ℃ to 60 ℃.

关 键 词：相变 复合材料 月桂酸 十四醇 相变特性 

分 类 号：TB34[一般工业技术—材料科学与工程]