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Synthesis and characterization of comb‐like crosslinking polyurethane based form‐stable phase‐change materials for thermal energy storage
Author(s) -
Yang Yunyun,
Kong Weibo,
Cai Xufu
Publication year - 2021
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.5425
Subject(s) - materials science , differential scanning calorimetry , thermogravimetric analysis , tmpta , polyurethane , thermal stability , fourier transform infrared spectroscopy , polyethylene glycol , temperature cycling , composite material , polymer , chemical engineering , thermal energy storage , thermal , acrylate , copolymer , ecology , physics , biology , meteorology , engineering , thermodynamics
Abstract To prevent the leakage of melting phase‐change materials (PCMs), form‐stable PCMs (FSPCMs), which usually contain organic PCMs and supporting materials, are prepared via several methods including microencapsulation, physical absorption, grafting PCMs on nanofillers, polymer coating, and so forth. However, the uneven distribution of PCMs in supporting materials affecting the energy storage efficiency is still a severe problem that needs to be considered. Herein, poly(ethylene glycol monomethyl ether)‐based trimethylolpropane (Ymer‐N120) with long side ethyoxyl segments is the first time used to prepare crosslinked polyurethane (PU) with symmetrical, regular flexible long chains that is designed to improve the distribution of polyethylene glycol (PEGs). The results of Fourier transform infrared spectroscopy, X‐ray diffraction, differential scanning calorimetry, accelerated thermal cycling testing, thermogravimetric analysis, and field emission scanning electron microscopy suggested a crosslinked PU containing uniform dispersed PEG crystal was prepared by thermal curing. The FSPCMs can store and release high latent heat (over 110 J/g) with good thermal stability (the initial decomposing‐temperature reaches 360°C) without leakage (after 500 times of accelerated thermal cycling testing).