Polyethylene Glycol-CaCl2 Coordination Compounds as a Novel Form-Stable Phase Change Material with Excellent Thermophysical Properties
Polyethylene Glycol-CaCl2 Coordination Compounds as a Novel Form-Stable Phase Change Material with Excellent Thermophysical Properties
复制标题
聚乙二醇-CaCl2配位化合物作为一种新型形态稳定的相变材料，具有优异的热物理性能
DOI：
10.1002/adem.201700643
复制
发表时间：
2018
影响因子：
3.6
通讯作者：
Sun Liangliang
中科院分区：
文献类型：
--
作者：
Sun Qinrong;Zhang Haiquan;Yuan Yanping;Cao Xiaoling;Sun Liangliang
聚乙二醇（PEG）作为相变材料（PCM）得到了广泛的研究。为了解决相变材料的漏液问题，首次报道了一种新型的基于配位化合物的形状稳定相变材料。测定了自制样品的结构、形貌、热性能和热稳定性。结果表明，PEG与Ca 2+之间存在配位键，在120 °C的温度下，PEG-CaCl 2复合材料没有发生漏液现象。PEG 8000-CaCl 2（1：2）FSPCM表现出相对较大的潜热，为147.7 J g−1，相当于纯PEG的87.8%。从动力学角度看，PEG 8000-CaCl 2复合物由于配位键的形成，结晶过程的活化能仅增加了5.2%，而熔融过程的活化能降低了18.3%。添加3wt%的导电炭黑后，PEG相变材料的储热性能可以得到优化。PEG-CaCl 2复合材料是一种很有前途的热能储存材料，可用于各种工程领域。
Polyethylene glycols (PEGs) have been extensively studied as phase change materials (PCMs). To overcome the problem of liquid leakage, the authors firstly report a novel form‐stable phase change material (FSPCM) using coordination compound. The structure, morphology, thermal property, and thermal stability of the self‐prepared samples are determined. The obtained results confirm the existence of coordination bonds between PEG and Ca2+species, and no liquid leakage is observed for the synthesized PEG–CaCl2composites at temperatures as high as 120 °C. The PEG8000–CaCl2(1:2) FSPCM exhibits a relatively large latent heat of 147.7 J g−1, corresponding to 87.8% of that of pure PEG. From the dynamical viewpoint, the activation energy of crystallization process is increased by only 5.2% for the PEG8000–CaCl2composite due to the formation of coordination bonds; however, the activation energy is reduced by 18.3% during melting process. After adding 3 wt% conductive carbon black, the heat storage performance of the PEG phase change material can be optimized. The PEG‐CaCl2composite would be a promising material for thermal energy storage applications and can be used in various engineering fields.