太阳盐基@Ti3C2Tx相变材料的制备与性能评价
Preparation and Performance Evaluation of Solar Salt-Based@Ti3C2Tx Phase Change Materials
张浩楠 1刘汉涛1
作者信息
- 1. 中北大学能源与动力工程学院,山西 太原 030051
- 折叠
摘要
以硝酸钾、硝酸钠组成的二元硝酸盐为基盐,采用熔融共混法制备了太阳盐@Ti3C2Tx复合相变材料,通过扫描电子显微镜(SEM)和透射电子显微镜(TEM)对复合相变材料的微观形貌、结晶结构进行了表征,以X射线光电子能谱(XPS)来分析材料的物相及晶体结构,利用差示扫描量热仪(DSC)对复合相变材料的熔点、凝固温度以及比热容进行了测量,利用热常数分析仪进行了导热系数的测量.结果表明:Ti3C2Tx可以均匀地分散到太阳盐的内部结构中,当 Ti3C2Tx纳米片质量分数为 1.5%时,熔盐纳米流体的比热容可以达到2.13 J·g-1·K-1,提高了47%,提高了整体的相变储热材料的蓄热能力;室温下热导率可以达到1.320 5 W·m-1·K-1,提高了37%,可提高相变材料的充放热效率.
Abstract
Solar salt@Ti3C2Tx composite phase change material was prepared by melt blending method using binary nitrate composed of potassium nitrate and sodium nitrate as base salt.The microstructure and crystal structure of the composite phase change material were characterized by scanning electron microscopy(SEM)and transmission electron microscopy(TEM).The phase and crystal structure of the composites were analyzed by X-ray photoelectron spectroscopy(XPS),the melting point,solidification temperature and specific heat capacity of the composites were measured by differential scanning calorimeter(DSC),and the thermal conductivity was measured by thermal constant analyzer.The results showed that Ti3C2Tx could be evenly dispersed into the internal structure of solar salts.When the mass fraction of Ti3C2Tx nanosheet was 1.5%,the specific heat capacity of molten salt nanofluid reached 2.13 J·g-1·K-1,which was 47%higher,and the heat storage capacity of the whole phase change thermal storage material was improved.At room temperature,the thermal conductivity was 1.320 5 W·m-1·K-1,with the increase of 37%,the heat transfer efficiency of phase change materials was improved.
关键词
Ti3C2Tx/太阳盐/相变/热传导/太阳能/纳米材料Key words
Ti3C2Tx/Solar salt/Phase change/Heat conduction/Solar energy/Nanomaterials引用本文复制引用
基金项目
太阳能利用技术山西省科技创新重点人才团队项目(202204051002023)
出版年
2024
NETL
NSTL
万方数据