摘要
用二甲基亚砜取代法制备了硬脂酸/埃洛石插层复合相变材料。借助于X射线衍射、综合热分析、红外光谱和扫描电子显微镜等方法分析了复合相变材料的插层效果、插层机理及热性能。结果表明:硬脂酸/埃洛石插层复合物中,埃洛石的层间距由0.74 nm增大到3.92 nm,插层率达到了95.4%,埃洛石的内表面羟基与硬脂酸的羰基形成了氢键,其外层硅氧面上的氧与硬脂酸的羟基形成了氢键,复合相变材料的相变温度为50.3℃,相变焓为103.9 J/g,经过200次冷热循环后仍具有较好的兼容性、热稳定性及化学稳定性。
Stearic acid/halloysite intercalated phase change compound was prepared by replacing method of dimethyl sulphoxide（DMSO）.The intercalation effects,mechanism,phase change temperature and latent heat of composite phase changing material（PCM） were analyzed by X-ray diffraction,thermal analyzer,infrared spectroscope and scanning electron microscope.The results show that the basal spacing of halloysite increases from 0.74 nm to 3.92 nm,and the apparent intercalation of product is 95.4%.Hydrogen bonds are formed between the carbonyl group in stearic acid and the hydroxyl group in inner surface of halloysite,hydrogen bonds can also be formed between the hydroxyl group in stearic acid and the oxygen atom of silicon and the oxygen layer in halloysite,phase change temperature of composite PCM is 50.3 ℃,phase change latent heat is 103.9 J/g,the composite PCM show favourable compatibility,thermal stability and chemical stability after 200 thermal cycles.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2011年第5期1155-1159,1167,共6页
Bulletin of the Chinese Ceramic Society
基金
河南省重点科技攻关项目(82102230042)
关键词
埃洛石
硬脂酸
插层
复合相变材料
halloysite
stearic acid
intercalation
composite PCM
作者简介
席国喜（1959-），男，教授．主要从事无机功能材料的研究。
通讯作者：路宽．E—mail：lu—kuan-1986@163．com
