膨胀石墨微结构表征及其储能复合材料的制备  

Characterization of microstructures of expanded graphite and preparation of its phase change composites for energy storage

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,南京211189

出　　处：《东南大学学报（自然科学版）》2009年第3期598-601,共4页Journal of Southeast University：Natural Science Edition

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)

摘　　要：以膨胀石墨为吸附介质,制备新型的相变储能复合材料.对膨胀石墨的制备及微结构的表征、有机相变材料的热物理性能测试、复合相变材料的制备及其储(放)热性能的测试等进行了试验.试验结果表明,可膨胀石墨在600W微波输出功率下处理10～15s后,可以制得具有良好吸附性能的膨胀石墨材料.电镜观测和压汞分析都显示,膨胀石墨具有丰富的孔隙结构,孔隙尺寸以微米级为主.由于膨胀石墨为非极性材料,且具有多孔性质,很容易吸附有机相变材料,其最佳的吸附比例为12.5mL/g.进行吸附处理后所制得的相变储能复合材料,具有明显的储能效应,能够起到调节环境温度的作用,同时根据上述特点可以达到将能量在不同的时间和空间进行转换的目的.Phase change composites are prepared based on absorption of expanded graphite （EG） on organic materials. The main experiments include the preparation of EG and the characterization of its microstructures, tests of thermal physical properties of organic phase change materials （PCMs）, preparation of phase change composites and evaluation of latent heat storage properties. The results show that EG with good absorption capacity can be prepared after 600 W microwave management for 10 to 15 s. According to SEM （scanning electron microscope） observation and MIP （mercury intrusion porosimetry） analysis, EG has abundant pore structures with pore sizes of μm levels. Because of its nonpolarity and porosity, EG is able to absorb organic PCMs easily. The best proportion is 12.5 mL/g. Phase change composites which have evident latent heat storage effect are prepared with absorption processes. These composites are able to adjust environment temperature and transfer energy at different times and in different spaces.

关 键 词：膨胀石墨 相变复合材料 潜热储能 多孔结构 

分 类 号：TB33[一般工业技术—材料科学与工程] TB34