癸酸-十六醇膨胀石墨复合相变储能材料的制备与研究.pdf

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文章编号:1007-9629(2014)01-0084-05
癸酸一十六醇/膨胀石墨复合相变储能
材料的制备与研究
吴其胜,仇影,黎水平,诸华军
(1.盐城工学院材料工程学院,江苏盐城224051
2.江苏大学材料科学与工程学院,江苏镇江212013)
摘要:利用癸酸(CA)和十六醇(H)在超声波作用下混溶制得二元有机低共熔物(CA-HI),然后以
其为相变材料,以膨胀石墨(EG)为載体,采用真空吸附法制备了相变材料质量分数不同(50%,
60%,80%,90%)的二元有机低共嫆物/膨胀石墨复合相变储能材料,并采用XRD,FTIR,SEM,
DSC以及融化一凝固过程分析对其结构与热性能进行了研究.結果表明:膨胀石墨对CA-H的物理
吸附作用达到80%时,复合相变储能材料具有热稳定性,其相变温度为22.4℃,相变焾为
93.87J/g;与CA-H相比,复合相变储能材料的传热速率有所增加
关键词;二元有机低共熔物;膨脒石墨;相变材料
中图分类号:TB332
文献标志码:A
doi:10.3969/j.issn.1007-9629.2014.01.015
Study of Capric Acid and Hexadecanol/Expanded Graphite Composite as
Phase Change Material for Thermal Energy Storage
WU Qisheng, QIU Ying, II Shuiping ZHU Huajun
(1. School of Materials Engineering, Yancheng Institute of Technology, Yancheng 224051, China
2. School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, Ch
Abstract: Eutectic mixture of binary organic composite of capric acid(CA) and hexadecanol (H) was syn
thesized by the ultrasonic method. The binary organic eutectic mixture(ca-h)/expanded graphite(EG)
composite with various mass fraction of CA-H(50%, 60%, 80, 90%)as a composite phase change mate
rial(PCM) was prepared by vacuum absorption technique using CA-H as phase change material and EG as
carrier. The thermal properties and structure of the composite material were characterized with the help of
XRD, FTIR, SEM and DSC. The result shows that the melting temperatures and the latent heats of CA
H/EG PCM with 80% of CA-H are measured to be 22.4 C and 93.87 J/g by DSC analysis
Key words: eutectic mixture of binary organic; expanded graphite(EG); phase change materil(PCM)
相变材料( phase change material,PCM)是在且由于相变材料具有较大的相变潜热,掺入少量相
状态转变过程中吸收或释放大量潜热的物质.近年变材料即可储存大量热量,从而可减小建筑物室内外
来相变材料因其特有的潜热、蓄热功能已经在热能温度变化幅度,对空调系统设计热冷负荷的降低起到
储存领域受到重视,将相变材料应用到建筑围护结一定作用,达到节能和改善热舒适度的目的.利用
构中,可以解决现代建筑中普通轻质材料比热容有机脂肪酸类和醇类固一液相变材料的相混性,拓
小的问题,增加建筑围护结构的蓄热能力和热惰性,宽其纯物质的相变温度,从而可制备出相变温度适宜
收稿日期:2012-10-14;修订日期:2013-03-04
基金项目:住房和城乡建设部科学技术项目(2008-K1-7);江苏省新型环保重点实验室开放课题基金资助项目(AE201111
第一作者:吴其胜(1965一),男,江苏射阳人,盐城工学院教授,硕士生导师,博士.E-mail:shengwu@ycit.cn