Polyethylene glycol (PEG)/diatomite composite as a novel form-stable phase change material for thermal energy storage
Polyethylene glycol (PEG)/diatomite composite as a novel form-stable phase change material for thermal energy storage
复制标题
DOI：
10.1016/j.solmat.2011.01.022
复制
发表时间：
2011-07-01
影响因子：
6.9
通讯作者：
Bicer, Alper
中科院分区：
文献类型：
--
作者：
Karaman, Sedat;Karaipekli, Ali;Bicer, Alper
研究了聚乙二醇硅藻土复合相变材料的制备、表征及其储热性能。通过在硅藻土孔内掺入聚乙二醇制得复合相变材料。聚乙二醇可保留50wt%进入硅藻土孔内，不会有熔融的聚乙二醇从复合材料中渗出。采用扫描电子显微镜和红外光谱分析技术对复合相变材料进行了表征。用差示扫描量热法测定了复合相变材料的热性能。DSC结果表明，复合相变材料的熔融温度为27.70℃，相变潜热为87.09 J/g。通过热循环试验确定了复合相变材料的热可靠性，结果表明复合相变材料具有良好的热可靠性和化学稳定性。热重分析表明，改性后的聚乙二醇硅藻土具有良好的热稳定性。通过添加不同质量分数的膨胀石墨，提高了复合相变材料的导热系数。对复合相变材料的储热性能进行了测试。(C)2011爱思唯尔B.V.保留所有权利。
This paper deals with the preparation, characterization, and determination of thermal energy storage properties of polyethylene glycol (PEG)/diatomite composite as a novel form-stable composite phase change material (PCM). The composite PCM was prepared by incorporating PEG in the pores of diatomite. The PEG could be retained by 50 wt% into pores of the diatomite without the leakage of melted PEG from the composite. The composite PCM was characterized by using SEM and FT-IR analysis technique. Thermal properties of the composite PCM were determined by DSC analysis. DSC results showed that the melting temperature and latent heat of the composite PCM are 27.70 degrees C and 87.09 J/g, respectively. Thermal cycling test was conducted to determine the thermal reliability of the composite PCM and the results showed that the composite PCM had good thermal reliability and chemical stability. TG analysis showed that the impregnated PEG into the diatomite had good thermal stability. Thermal conductivity of the composite PCM was improved by adding expanded graphite in different mass fractions. Thermal energy storage performance of the composite PCM was also tested. (C) 2011 Elsevier B.V. All rights reserved.