摘要
以石蜡、壳聚糖和膨胀石墨为原料,使用冷冻干燥-浸渍法制备了石蜡/壳聚糖@膨胀石墨(PA/CS@EG)复合相变储热材料,并对其性能进行表征分析。结果表明:复合相变材料相变温度为36.45℃,潜热达到188.7J/g。复合材料各组分之间通过物理相互作用结合,且组分间化学相容性良好没有发生化学反应;当温度不高于170℃时,复合材料不会发生热分解,具有很好的热稳定性;经过300次冷热循环后仍能保证相变材料良好的储热能力;碳基导热填料的加入使复合材料的导热性有显著的增强,相比较纯石蜡,复合材料导热系数提高了295%。因此,制备的复合材料在低温储热领域有非常可观的应用前景。
Paraffin/chitosan@Expanded graphite composite phase change thermal energy storage materials were prepared using paraffin,chitosan,and expanded graphite as raw materials via freeze-drying and impregnation technology,and their properties were characterized and analyzed.The results showed that the composite had a phase change temperature of 36.45℃and a latent heat of 188.7J/g.The components of the composite were combined through physical interactions,with good chemical compatibility and no chemical reactions occurring.When the temperature did not exceed 170℃,the composite material exhibited excellent thermal stability,showing no thermal decomposition.The phase change material still maintained excellent thermal storage capacity even after experienced 300 thermal cycles.Due to the involvement of carbon-based thermal conductive fillers,the thermal conductivity of the composite was significantly enhanced,achieving a 295%increase compared with pure paraffin.The results presented in this work indicated that the fabricated composite could be a promising candidate utilized in low-temperature thermal energy storage field.
作者
王进
游成杰
赵艳江
徐嘉文
候圣贤
李传
Wang Jin;You Chengjie;Zhao Yanjiang;Xu Jiawen;Hou Shengxian;Li Chuan(School of Chemistry and Chemical Engineering,Shandong University of Technology,Zibo 255000)
出处
《化工新型材料》
北大核心
2025年第S2期249-254,共6页
New Chemical Materials
关键词
石蜡
壳聚糖
膨胀石墨
储热
导热增强
低温储热领域
paraffin
chitosan
expanded graphite
thermal energy storage
thermal conductivity enhancement
low-temperature thermal energy storage field
