Preparation and characterization of polyethylene glycol/active carbon composites as shape-stabilized phase change materials
Preparation and characterization of polyethylene glycol/active carbon composites as shape-stabilized phase change materials
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DOI：
10.1016/j.solmat.2010.09.033
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发表时间：
2011-02-01
影响因子：
6.9
通讯作者：
Li, Xingguo
中科院分区：
文献类型：
--
作者：
Feng, Lili;Zheng, Jie;Li, Xingguo
采用共混和浸渍的方法制备了由聚乙二醇（PEG）和介孔活性炭（AC）组成的形状稳定的相变材料（PCM）。采用各种技术来表征复合材料的结构和热性能。随着 PEG 重量百分比和分子量的降低，观察到较低的相变温度和焓。随着AC含量的增加，PCM中PEG的结晶度降低。 PEG相变的活化能随着PEG重量百分比的增加而降低。我们得出的结论是，PEG/AC PCM 的相变特性受到 AC 多孔结构中 PEG 链段的吸附限制以及 AC 作为完美 PEG 结晶杂质的干扰的影响。 (C) 2010 Elsevier B.V. 保留所有权利。
Shape-stabilized phase change materials (PCMs) composed of polyethylene glycol (PEG) and mesoporous active carbon (AC) were prepared by a blending and impregnating method. Various techniques were carried out to characterize the structural and thermal properties of the composites. Lower phase change temperatures and enthalpies were observed as the weight percentage and molecular weight of PEG was decreased. The crystallinity of PEG in the PCMs decreased with the increase in the AC content. The activation energy of the PEG phase change decreased with higher PEG weight percentages. We conclude that the phase change properties of the PEG/AC PCMs are influenced by the adsorption confinement of the PEG segments from the porous structure of AC and also the interference of AC by acting as an impurity with perfect PEG crystallization. (C) 2010 Elsevier B.V. All rights reserved.