己二酸/膨胀石墨复合相变材料性能研究  

Study on performance of adipic acid/expanded graphite composite phase change materials

作　　者：周卫兵[1] 蔡凡凡[1] 朱教群[1] 程晓敏[1] 原郭丰[2] 

机构地区：[1]武汉理工大学材料科学与工程学院,武汉430070 [2]中国科学院电工研究所,北京100190

出　　处：《功能材料》2014年第15期15075-15079,共5页Journal of Functional Materials

基　　金：国家科技支撑计划资助项目(2012BAA05B05;2012BAA05B06);武汉市科技攻关资助项目(201210321094)

摘　　要：以己二酸为相变材料,膨胀石墨为导热增强相,采用机械混合与熔融吸附的方法,制备出己二酸/膨胀石墨复合相变储热材料。通过FT-IR、DSC、热常数分析仪、TG、FE-SEM及热循环实验对制备的复合材料进行了结构和性能研究。结果表明,膨胀石墨能够有效吸附己二酸,两者之间化学相容性良好;随着膨胀石墨掺量的增加,复合材料的相变潜热有减少趋势,导热系数则相应提高;当膨胀石墨的掺量为8%(质量分数)时,制备的复合材料的熔化、凝固相变潜热分别为237.66,220.49J/g,导热系数为2.99W/(m·K),具有良好的热稳定性。Adipic acid as phase change materials,expanded graphite as the heat conduction reinforcement,adipic acid/expanded graphite composite phase change thermal storage material was prepared by mechanical mixing and melted adsorption method.The structure and properties of composite were investigated by FT-IR,DSC, thermal constants analyzer,TG,FE-SEM and thermal cycling tests.The results show that,adipic acid can be absorbed into the expanded graphite effectively,and exhibits good compatibility with expanded graphite.With the increase of expanded graphite content,the latent has a declining trend,while thermal conductivity was a corresponding increase of composite phase change materials.Adipic acid/8wt% expanded graphite composite phase change materials melting/solidification enthalpy was 273.66/220.49 J/g in melting/freezing process re-spectively,and thermal conductivity was 2.99 W/（m？？K）.It has a good thermal stability of composite phase change materials.

关 键 词：己二酸 膨胀石墨 相变潜热 导热系数 热稳定性 

分 类 号：TK512.4[动力工程及工程热物理—热能工程]