摘要
A nanocomposite phase change thermal energy storage material was prepared by intercalating stearic acid into the nano-layers of modified bentonite in liquid media. XRD patterns showed that the intergallery distance of the nanocomposite material was larger than that of modified bentonite owing to intercalating of stearic acid. The phase change temperature of the nanocomposite phase change material was different from that of stearic acid,and its phase change latent heat was equivalent to the calculated value based on the mass ratio of stearic acid in the composite. The experimental results of thermal energy storage and release indicated that the heat transfer rate of the nanocomposite material was obviously higher than that of stearic acid. After the nanocomposite experienced 1500 times cooling-heating cyclic test,its phase change temperature and latent heat showed little change,which suggested that the stearic acid/bentonite nanocomposite phase change material exhibited good stability of structure and properties. This method of intercalating organic phase change material into the nano-layers of bentonite provides a new route to prepare phase change materials with high performances.
A nanocomposite phase change thermal energy storage material was prepared by intercalating stearic acid into the nano-layers of modified bentonite in liquid media. XRD patterns showed that the intergallery distance of the nanocomposite material was larger than that of modified bentonite owing to intercalating of stearic acid. The phase change temperature of the nanocomposite phase change material was different from that of stearic acid,and its phase change latent heat was equivalent to the calculated value based on the mass ratio of stearic acid in the composite. The experimental results of thermal energy storage and release indicated that the heat transfer rate of the nanocomposite material was obviously higher than that of stearic acid. After the nanocomposite experienced 1500 times cooling-heating cyclic test,its phase change temperature and latent heat showed little change,which suggested that the stearic acid/bentonite nanocomposite phase change material exhibited good stability of structure and properties. This method of intercalating organic phase change material into the nano-layers of bentonite provides a new route to prepare phase change materials with high performances.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2004年第4期678-681,共4页
CIESC Journal
基金
国家自然科学基金 (No 5 0 2 0 80 0 8)
广东省自然科学基金 (No 0 0 0 5 2 3 )
国家重点基础研究发展规划项目(No G2 0 0 0 0 2 63 0 1)资助~~
关键词
相变储热
有机/无机纳米复合材料
膨润土
硬脂酸
phase change thermal energy storage,organic/inorganic nanocomposite material,bentonite,stearic acid
