Preparation and Characterization of Polyethylene Glycol/Cement-Based Composite Phase Change Materials

被引：0
|
作者：
Du Y. [1 ]
Wang Z. [1 ]
Quan X. [1 ]
Ma C. [2 ]
Jin J. [3 ]
机构：
[1] School of Civil Engineering, Central South University, Changsha
[2] College of Civil and Transportation Engineering, Shenzhen University, Shenzhen
[3] School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha
来源：
Jianzhu Cailiao Xuebao/Journal of Building Materials | 2023年 / 26卷 / 04期
关键词：
cooling performance; pavement cooling; phase change material; polyethylene glycol; sulphoaluminate cement;
D O I：
10.3969/j.issn.1007-9629.2023.04.004
中图分类号：
学科分类号：
摘要：
Hydration products of sulphoaluminate cement were used to produce the phase change material of polyethylene glycol. A kind of cement‑based composite phase change materials（CPCMs）with high polyethylene glycol content was prepared by the steps of hydration and crystallization，taking advantage of the water solubility of polyethylene glycol and the hydraulic property of sulphoaluminate cement. The microstructure，chemical compatibility，crystal structure，phase change properties，thermal stability and cooling performance of CPCMs with different polyethylene glycol contents were systematically analyzed. The results show that polyethylene glycol is well distributed in the porous network structure of hydration products with high loading capacity. Polyethylene glycol and hydration products of sulphoaluminate cement have good chemical compatibility with no chemical reaction between them. CPCMs have good thermal stability under 250 ℃，indicating that the CPCMs can be used to construct phase change thermal storage asphalt pavement. The phase change enthalpy of CPCMs with polyethylene glycol mass fraction of 36.36% can reach up to 62.48 J/g，the surface temperature of which reduces by 7.3 ℃ compared with the control group sulphoaluminate cement. © 2023 Tongji University. All rights reserved.
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页码：361 / 368
页数：7
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