Cross-linked polyurethane as solid-solid phase change material for low temperature thermal energy storage

被引：34

作者：

Harle, Thibault ^{[1
,2
,4
]}

Nguyen, Giao T. M. ^{[2
,4
]}

Ledesert, Beatrice ^{[1
,4
]}

Melinge, Yannick ^{[3
,4
]}

Hebert, Ronan L. ^{[1
,4
]}

机构：

[1] Univ Cergy Pontoise, Geosci & Environm Cergy, F-95033 Cergy, France

[2] Univ Cergy Pontoise, Lab Physicochim Polymeres & Interfaces, F-95033 Cergy, France

[3] Univ Cergy Pontoise, Lab Mecan & Mat Genie Civil, F-95033 Cergy, France

[4] Univ Cergy Pontoise, Federat Inst Mat I MAT, F-95033 Cergy, France

来源：

THERMOCHIMICA ACTA | 2020年 / 685卷

关键词：

Phase change materials; Solid-solid transition; Latent heat storage; Polyurethanes; Thermal characterization; Poly(ethylene glycol); POLYETHYLENE-GLYCOL; COPOLYMER; PERFORMANCE; LINKING;

D O I：

10.1016/j.tca.2019.01.007

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In this study polyurethanes (PU) are considered as solid-solid phase change material (s-s PCM) for thermal energy storage. Linear PU (PUL) and cross-linked PU (PUX) are synthesized using hexamethylene diisocyanate (HMDI), poly(ethylene glycol) (PEG) and glycerol as cross-linker. The synthesis has been carried out with no solvent or catalyst, these conditions are especially appreciated for environmental and health reasons. PEG with different molecular weights were investigated: 1000 g.mol(-1), 1500 g.mol(-1) and 2000 g.mol(-1). The crystallization of polymers is observed by polarized optic microscopy (POM). The thermal behaviour of the s-s PCM has been investigated by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The effect of PEG's molecular weight on thermal properties of s-s PCM has been investigated, as well as the effect of reactive stoichiometry and that of the cross-linker content. By varying the different parameters a range of s-s PCM with different properties are synthesized. The temperature transitions were found between 21 degrees C and 33 degrees C, and the latent heat between 76 J/g and 103 J/g, depending on the parameters. The hardness of PUX reaches 30 on shore D scale. This feature allows the reduction of the s-s PCM into powder which can be a very interesting property in order to incorporate PCM into various composite materials for thermal energy storage purposes.

引用

页数：9

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