十六醇十六酸十二酸三元复合相变体系研究.pdf

第16卷第1期
建筑材料学报
Vol 16, No
2013年2月
JOURNAL OF BUILDING MATERIALS
Feb.,2013
文章编号:1007-9629(2013)01-0097-05
十六醇/十六酸/十二酸三元复合相变体系研究
于永生2,井强山2,宋方方
(1.信阳师范学院非金属材料研究所,河南信阳464000;
2.河南省珍珠岩制品工程技术研究中心,河南信阳464000)
摘要:采用步冷曲线法测定了不同质量比的十六醇(H/十六酸(PA)二元体系的相变温度,绘制
了该体系的なx相图;在其最低共熔点附近引入十二酸(LA)组成三元体系,同样测定了该三元体
系在不同质量比下的相变温度,得到了其なx相图,采用差示担描量热仪(DSC)和傳里叶变换红外
光谱(FTIR)对上述二元和三元体系中低共熔物的热性能和稳定性进行表征,结果表明:不同质量
比的H-PA二元体系均能形成共熔物,H与PA的质量比分别为6:4和7:3时引入LA的三元
体系能形成最低共熔物;H,PA,LA这三者的质量分数之比分別为30:20:50和35:15:50的
三元体系,其相变娢和相变温度分别为179.63,177.87J/g及26.5,27.0℃,连续相变过程无分层
现象,1200次热循环后热稳定性好
关键词:相变材料;三元体系;储能;十六醇;十六酸;十二酸
中图分类号:TB34
文献标志码:A
doi:10.3969/j.issn.1007-9629.2013.01.018
Study on the Ternary Phase Change System of H/PA/LA
YU Yong-sheng*, JING Qiang-shan=, SONG Fang-fang
(1. Institute of Non-metallic Materials, Xinyang Normal University, Xinyang 464000, China;
2. Henan Engineering Technology Research Center of Perlite Products, Xinyang 464000, China
Abstract: The t-x phase diagram and phase change temperature of hexadecanol(H) and palmitic acid (PA
with different proportions were determined by cooling curve method. The ternary system was formed b
introducing lauric acid(LA) at near lowest eutectic point. With the same method the phase change temper-
atures and t-x phase diagram of the ternary system of H/PA/LA were determined. The thermal properties
and stability performance of the composite phase change material were investigated by differential scanning
calorimetry(DSC) and fourier transform infrared spectroscopic(FTIR) techniques. Experimental results
show that the binary eutectic mixture is formed at the different ratio of H to PA. The ternary eutectic sys-
tems can be formed by introducing IA in the binary system of H/PA when the mass ratios of H to PA are
6: 4 and 7: 3. At a mass proportion of 30: 20: 50 and 35: 15: 50(H/PA/LA), the latent heat and the
lowest eutectic point are 179. 63 J/g and 177. 87 J/g, 26.5 and 27.0 C, respectively. During the contin
uous phase change process of the ternary system no stratification was observed. The good thermal stability
of the ternary system was proved by the FTIR and DSC after 1 200 thermal cycles.
Key words: phase change material; ternary system; energy storage; hexadecanol(H); palmitic acid(PA)
lauric acid(LA)
相变储能材料( phase change material,PCM)是利用物质在相变过程中吸热和放热进行能量储存和
收稿日期:2011-09-02;修订日期:2012-06-20
基金项目:河南省科技厅重点攻关项目(082102340005);信阳师范学院校青年基金资助项目(20100058)
第一作者:于水生(1979一),男,河南开封人,信阳师范学院讲师,硕士,E-mail:yysh0713@163.com