Thermal Properties and Characterization of n-Decanol-Capric Acid/Expanded Graphite/Boron Nitride for Thermal Energy Storage

IF 0.7 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Science Pub Date : 2023-12-07 DOI:10.5755/j02.ms.33351
TongQiang Liang, Piaopiao Huang, Yanghua Chen, Junkang Wu
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Abstract

To find a low temperature phase change material (PCM) that can be applied to the middle constant temperature chamber of the three chamber refrigerator, this study proposes a binary eutectic PCM of n-decanol and capric acid as a base liquid, expanded graphite as a support material, and boron nitride as a thermal conductivity enhanced particle to modify the material. The composite PCM with suitable phase change temperature and high phase change latent heat is prepared by the solution blending method. The leakage rate experiment determines the maximum adsorption ratio of expanded graphite to be 92 %. The chemical structure, microstructure and thermodynamic properties are characterized by Fourier transform infrared spectroscopy, differential scanning calorimetry, scanning electron microscopy, thermal conductivity analyzer and thermogravimetric analyzer. The results show that the n-decanol and capric acid binary eutectic PCM is fully wrapped in the porous structure of expanded graphite, and boron nitride thermal conductivity enhanced particles are well adsorbed on the surface and pores of expanded graphite. The n-decanol and capric acid phase change material, boron nitride thermal conductivity enhanced particles and expanded graphite support material are only physically combined and no chemical reaction occurred. The phase change temperature of CPCM-2 with 3 % boron nitride thermal conductivity enhanced particles is -3.68 °C, the phase change latent heat is 129.2 J/g, and the thermal conductivity is 0.75 W/m·K. It has good thermal stability and reliability in the application temperature range.
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用于热能储存的正癸醇-癸酸/膨胀石墨/氮化硼的热性能和特性分析
为了寻找一种适用于三室制冷机中恒温箱的低温相变材料(PCM),本研究提出了以正癸醇和癸酸为基液,膨胀石墨为支撑材料,氮化硼作为导热增强颗粒对材料进行改性的二元共晶PCM。采用溶液共混法制备了相变温度适宜、相变潜热高的复合相变材料。泄漏率实验确定膨胀石墨的最大吸附比为92%。采用傅里叶变换红外光谱、差示扫描量热仪、扫描电镜、热导仪和热重分析仪对其化学结构、微观结构和热力学性质进行了表征。结果表明:正癸醇和癸酸二元共晶PCM被膨胀石墨的多孔结构完全包裹,氮化硼导热增强颗粒在膨胀石墨表面和孔隙上吸附良好;正癸醇-癸酸相变材料、氮化硼导热增强颗粒和膨胀石墨支撑材料只是物理结合,没有发生化学反应。含3%氮化硼导热增强颗粒的CPCM-2相变温度为-3.68℃,相变潜热为129.2 J/g,导热系数为0.75 W/m·K。在应用温度范围内具有良好的热稳定性和可靠性。
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来源期刊
Materials Science
Materials Science 工程技术-材料科学:综合
CiteScore
1.60
自引率
44.40%
发文量
63
审稿时长
4-8 weeks
期刊介绍: Materials Science reports on current research into such problems as cracking, fatigue and fracture, especially in active environments as well as corrosion and anticorrosion protection of structural metallic and polymer materials, and the development of new materials.
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