膨胀石墨基复合相变材料的结构与性能研究
Characterization of Microstructure and Property for Phase Change Materials of Expanded Graphite Matrix Composite
以膨胀石墨(EG)为载体,石蜡为相变材料,利用EG对石蜡良好的吸附性,制备了膨胀石墨基复合相变材料。采用扫描电镜、差示扫描量热仪、RC-4温度记录仪、傅里叶红外光谱仪、X射线衍射分析仪对复合相变材料的结构与性能进行了测试和表征。实验结果表明,复合相变材料是EG和石蜡的物理结合,随着EG含量的增加,复合相变材料的相变潜热和相变温度降低,但分散性提高,稳定性增强,导热性能增加;同时,蓄热时间缩短,效率增加,且蓄热过程中温度对复合相变材料相变时间影响明显;综合分析,要保证复合相变材料结构稳定和性能优良,EG的质量分数应控制在10%左右。
热力工程、热机材料科学
复合材料石蜡膨胀石墨复合相变材料结构性能
余荣升,晏华,汪宏涛,李云涛.膨胀石墨基复合相变材料的结构与性能研究[EB/OL].(2023-03-31)[2025-09-30].https://chinaxiv.org/abs/202303.10736.点此复制
Composite phase change materials were synthesized with expanded graphite (EG) as carrier and paraffin as phase change component. The microstructure and properties of the composite phase change materials were characterized by means of scanning electron microscopy, differential scanning calorimetry, RC- 4 temperature recorder, Fourier infrared spectrometer and X- ray diffraction analyzer.Results confirm that the composite phase change material is a combination of EG and paraffin.With the increase of EG content, the latent heat and phase change temperature of composite phase change materials decreased, however their dispersibility, stability and thermal conductivity increased, whilst they showed enhanced efficiency with shorten heat storage time; The temperature of the heat storage process has obvious effect on the transformation time of the composite phase change materials; Therefore, in order to ensure the composite phase change materials with appropriate microstructure and good performance, the fraction of EG should be controlled around 10%.
展开英文信息
评论