潜热储能石膏基建筑材料的制备及其储(放)热行为研究  

Study on preparation and thermal performance tests of latent heat storage gypsums

作　　者：施韬[1] 孙伟[1] 王倩楠[1] 

机构地区：[1]东南大学材料科学与工程学院江苏省土木工程材料重点实验室,江苏南京211189

出　　处：《功能材料》2009年第6期970-973,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50808044);中国博士后基金资助项目(20070420961);江苏省博士后科研资助项目(0702005B)

摘　　要：以膨胀石墨为吸附介质,硬脂酸丁酯为吸附对象,可以制得有机/无机复合相变材料,将这种复合材料掺入石膏中制备潜热储能石膏建材。DSC的测试结果显示,复合相变材料的相变焓值与纯硬脂酸丁酯的相变焓值基本相当,体现了良好的热物理性能。考虑到浆体的和易性,复合相变材料在石膏试样中的掺量不宜超过5%。在石膏硬化浆体中,复合相变材料与石膏浆体间的界面具有一定的缺陷,但是对石膏试样的强度影响不大。温度循环试验显示,复合相变材料掺量5%的潜热储能石膏具有良好的储(放)热效果,这种特性将有助于增加环境温度波动的惰性,实现热量在不同时间上的迁移,从而在建筑节能领域中加以应用。The organic/inorganic phase change composites, which selected butyl stearate as latent heat storage material, are prepared based on expanded graphite absorptions. These composites are incorporated into gypsum to prepare latent heat storage gypsum building materials. The DSC tests show that the total latent heat of phase change composites is consistent with the pure butyl stearate samples and these results reflect the good thermal properties of phase change composites. The percentage of composites in gypsum should not over 5wt% consider the workability of gypsum pastes. There are some faults along the interface of phase change composites and gypsum pastes but these faults have little effect on the strength of the samples. As results of temperature cycle tests, the thermal storage gypsum which incorporated 5wt% phase change composites can provide good thermal performance. These new materials are able to adjust environment temperature and transfer energy between different time and space.

关 键 词：潜热储能 膨胀石墨 硬脂酸丁酯 石膏 建筑节能 

分 类 号：TU5[建筑科学—建筑技术科学] TB33[一般工业技术—材料科学与工程]