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Preparation and characterization of paraffin microencapsulated phase change material with double shell for thermal energy storage
Thermochimica Acta ( IF 3.5 ) Pub Date : 2020-07-01 , DOI: 10.1016/j.tca.2020.178652
Xiaokun Yu , Jingde Luan , Wei Chen , Jialu Tao

Abstract Microencapsulated phase change material with double shell (MicroPCMDS) was prepared using paraffin as heat storage core material to solve leakage prevention and improve heat conduction. TEOS hydrolyzed silica served as the first layer of inorganic shell, while the modified spherical silica was used to form the second layer shell. The microstructure, chemical structure, thermal stability and thermal properties of MicroPCMDS were characterized by the FE-SEM, FTIR, DSC, TGA and the thermal conductivity meter. The results indicated that MicroPCMDS presented a good double shell spherical structure. The double shell had an important effect on improving its thermal stability and thermal conductivity of MicroPCMDS. Notably, the thermal conductivity of MicroPCMDS increased by 133.33 % and can maintain good sealing at 65 °C. Since the outstanding properties, there will be a promising prospect for MicroPCMDS in the field of thermal energy storage.

中文翻译:

双壳热储能石蜡微囊相变材料的制备与表征

摘要 以石蜡为蓄热芯材制备双壳微胶囊相变材料(MicroPCMDS),以解决防渗漏和提高热传导的问题。TEOS水解二氧化硅作为第一层无机壳,而改性球形二氧化硅用于形成第二层壳。通过FE-SEM、FTIR、DSC、TGA和热导仪对MicroPCMDS的微观结构、化学结构、热稳定性和热性能进行了表征。结果表明MicroPCMDS呈现出良好的双壳球形结构。双壳层对提高MicroPCMDS的热稳定性和热导率有重要作用。值得注意的是,MicroPCMDS 的热导率提高了 133.33%,并且可以在 65°C 下保持良好的密封性。
更新日期:2020-07-01
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