摘要
以不同膨胀石墨(EG-300、EG-350和EG-400)为支撑材料,石蜡(PW)为相变主材,提钒尾渣(VT)为导热强化剂,采用熔融共混法制备复合相变材料,并对复合材料的导热性能进行测试分析。结果表明:在PW当中分别添加9%、8%和7%的3种膨胀石墨时,PW不会泄漏;分别在3种复合相变材料中添加1%~3%的微米级VT,得到9种VT/EG/PW复合相变材料,在4MPa下压制成型,进行60次热循环;添加VT之后,复合材料在不同温度下热导率多数变大,而60次热循环之后的热导率损失率多数变小,添加微米级VT可以增强复合材料的导热性能,减缓热导率衰减。说明在EG/PW复合相变材料当中添加一定量的微米级VT可以增强材料的导热性能。
Paraffin(PW)were used as the main phase change materials,different expanded graphites(EG-300,EG-350 and EG-400)for the framework,and vanadium tailings(VT)as thermal conductivity enhancing agents.All composite phase change materials were prepared by melt-blending method,and the thermal conductivity were tested and analyzed.The results shown that the PW,adding three expanded graphite with the mass fraction of 9%,8% and 7%,had no leakage occurred.Nine VT/EG/PW were prepared by adding 1% to 3% of micron-level VT into 3 types of composite phase change materials,respectively.All VT/EG/PW material was press-molded at 4 MPa,and subjected to60 thermal cycles.Addition of VT had little effect on the thermal stability of the material.the thermal conductivity of the composite at different temperatures mostly increased,and the thermal conductivity loss rate after 60 energy storage/release cycles mostly decreased.Adding micron-level VT can enhance the composite’s thermal conductivity,and slowed down the thermal conductivity decay.It shown that adding a certain amount of micron-level VT to the EG/PW composite can enhance the thermal conductivity.
作者
徐众
侯静
李军
吴恩辉
黄平
Xu Zhong;Hou Jing;Li Jun;Wu Enhui;Huang Ping(College of Vanadium and Titanium,Panzhihua University,Panzhihua 617000;Sichuan Provincial Engineering Laboratory of Solar Technology Integration,Panzhihua 617000;Application and Solar Technology Integration Sichuan Provincial Key Laboratory of University,Panzhihua 617000)
出处
《化工新型材料》
CAS
CSCD
北大核心
2021年第5期115-119,共5页
New Chemical Materials
基金
攀枝花大学科技园发展有限责任公司项种子基金“双创”项目(2019-07)
国家级大学生创新项目(201911360002)
四川省教育厅太阳能高校重点实验室项目(2018TYNSYS-Y-04)
2019年度攀枝花市指导性科技计划项目(2019ZD-S-27)。
关键词
复合相变材料
膨胀石墨
提钒尾渣
热导率
热导率损失率
composite phase change material
expanded graphite
vanadium tailing
thermal conductivity
loss rate of thermal conductivity
