Preparation and thermal properties of polyethylene glycol/expanded graphite blends for energy storage
Preparation and thermal properties of polyethylene glycol/expanded graphite blends for energy storage
复制标题
储能用聚乙二醇/膨胀石墨共混物的制备及其热性能
DOI：
10.1016/j.apenergy.2008.12.004
复制
发表时间：
2009-09-01
期刊：
影响因子：
11.2
通讯作者：
Yan, Jinyue
中科院分区：
文献类型：
--
作者：
Wang, Weilong;Yang, Xiaoxi;Yan, Jinyue
膨胀石墨具有良好的导热性能，可提高有机相变材料的导热性能，是一种很有前途的传热促进剂。此外，它还可以作为支撑材料，以保持共混物的形状在相变过程中的稳定。结果表明，聚乙二醇的质量分数最高可达90%，在熔融过程中无泄漏，潜热为161.2 J g（-1），熔点为61.46 ℃。结果表明，相变潜热的大小与聚乙二醇的含量有关，随聚乙二醇含量的增加而增加。此外，所测得的复合相变材料的焓与聚乙二醇组分的质量比成正比。不同配比的复合材料的熔融温度基本相同。与纯聚乙二醇的电导率0.2985 W m（-1）K-1相比，共混物的电导率显著提高，具有1.324 W m（-1）K-1的高值。(C)2008爱思唯尔有限公司保留所有权利。
Expanded graphite is a promising heat transfer promoter due to its high conductivity, which improves the thermal conductivity of organic phase change materials. Moreover, it can also serve as supporting materials to keep the shape of the blends stable during the phase transition. After various investigation, the results showed that the maximum weight percentage of polyethylene glycol was as high as 90% in this paper without any leakage during the melting period, with the latent heat of 161.2 J g(-1) and the melting point of 61.46 degrees C. It was found that the value of the latent heat was related to the polyethylene glycol portion, increased with the increase in polyethylene glycol content. Moreover, the measured enthalpy of the composite phase change materials was proportional to the mass ratio of the polyethylene glycol component. The melting temperatures were almost the same with different ratios of composites. The conductivity of blends was improved significantly with the high value of 1.324 W m(-1) K-1 compared to the pure polyethylene glycol conductivity of 0.2985 W m(-1) K-1. (C) 2008 Elsevier Ltd. All rights reserved.