膨胀石墨、石墨烯改善无机盐相变材料热物性能  

Improvement of thermal properties of hybrid inorganic salt phase change materials by expanded graphite and graphene

作　　者：张焘[1] 曾亮[1] 张东[1] 

机构地区：[1]同济大学材料科学与工程学院,上海200092

出　　处：《无机盐工业》2010年第5期24-26,共3页Inorganic Chemicals Industry

基　　金：教育部新世纪优秀人才支持计划(NCET-07-0626);上海市"科技创新行动计划"国际合作项目(08160706900);上海市"科技创新行动计划"基础研究重点项目(09JC1414400);国家高技术研究发展计划(863计划)课题(2009AA05Z419)

摘　　要：无机盐中、高温相变储能技术对于能源的开发和合理利用具有重要的意义,在太阳能热发电、工业热利用及余热回收方面有着显著优点。采用水溶液法成功制备了性能优异的NaNO3-LiNO3/膨胀石墨、NaNO3-LiNO3/石墨烯复合相变储能材料。利用DSC,MDSC研究了膨胀石墨、石墨烯的添加对NaNO3-LiNO3相变热、峰值温度、导热系数等热物性的影响。结果表明,膨胀石墨、石墨烯的添加使得混合盐的相变热均略有减少,但相变峰值温度分别降低了1.30℃和2.16℃,导热系数分别提高了37.6%和268.8%。Inorganic salt middle-and-high temperature phase change energy storage technology has great significance for development and appropriate utilization of energy,and has obvious advantages in solar thermal power generation,industrial process heat use,waste heat recovery and so on..High-performance NaNO3-LiNO3（mass ratio is 4.5~5.5）/expanded graphite（EG） and NaNO3-LiNO3/graphene composite phase change materials were successfully prepared by aqueous solution method.Influence of addition of EG and graphene on thermal properties,such as phase change latent heat,peak temperature,and thermal conductivity of NaNO3-LiNO3,were studied by DSC and MDSC.Results showed that the adding of EG and graphene to NaNO3-LiNO3 decreased the mixed inorganic salt′s latent heat slightly,but reduced peak temperature of phase change by 1.30 ℃ and 2.16 ℃,and increased thermal conductivity by 37.6% and 268.8% respectively.

关 键 词：相变储能材料 无机混合盐 石墨烯 导热系数 

分 类 号：TQ127.12[化学工程—无机化工]