Binary shape-stabilized phase change materials based on poly(ethylene glycol)/polyurethane composite with dual-phase transition

Changzhong Chen*, Jun Chen, Yifan Jia, Paul D. Topham, Linge Wang

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Novel binary shape-stabilized composite phase change materials (CPCMs) have been successfully prepared using a crosslinked polyurethane (PU) copolymer with a solid–solid phase transition as the supporting framework for loading additional (‘free’) poly(ethylene glycol) (PEG). The PU copolymer was synthesized by a two-step method using 2-hydroxypropyl-β-cyclodextrin (Hp-β-CD) as a chain extender and PEG as a soft segment. The composition, morphology, phase transition behavior and thermal properties of the prepared CPCMs have been elucidated by a wide range of techniques. Investigation of FTIR spectra and SEM images reveal that the ‘free’ PEG and the PU copolymer network within the CPCMs have good compatibility and high affinity due to the noncovalent interactions. Polarized light optical microscopy shows that the CPCMs produce smaller spherulites than pristine PEG, and homogeneous nucleation was prevalent during the crystallization process. Due to the dual-phase transition of the CPCMs (the solid–liquid phase transition of ‘free’ PEG and solid–solid phase transition of the PU matrix) occurring within the same, narrow temperature window, the CPCMs have far higher heat storage density compared with that of traditional shape-stabilized PCMs with the same ‘free’ PEG content. Importantly, thermal cycling and thermogravimetric analyses show that the CPCMs have good reusability and excellent thermal stability for potential use in thermoregulation or energy storage applications.

Original languageEnglish
Number of pages18
JournalJournal of Materials Science
Early online date20 Aug 2018
DOIs
Publication statusE-pub ahead of print - 20 Aug 2018

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Polyurethanes
Phase change materials
Polyethylene glycols
Phase transitions
Composite materials
Copolymers
Optical microscopy
Heat storage
Pulse code modulation
Cyclodextrins
Reusability
Thermal cycling
Light polarization
Crystallization
Energy storage
Thermodynamic stability
Nucleation
Thermodynamic properties
Scanning electron microscopy
Chemical analysis

Bibliographical note

© Springer Nature B.V. 2018. The final publication is available at Springer via http://dx.doi.org/10.1007/s10853-018-2806-2

Cite this

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title = "Binary shape-stabilized phase change materials based on poly(ethylene glycol)/polyurethane composite with dual-phase transition",
abstract = "Novel binary shape-stabilized composite phase change materials (CPCMs) have been successfully prepared using a crosslinked polyurethane (PU) copolymer with a solid–solid phase transition as the supporting framework for loading additional (‘free’) poly(ethylene glycol) (PEG). The PU copolymer was synthesized by a two-step method using 2-hydroxypropyl-β-cyclodextrin (Hp-β-CD) as a chain extender and PEG as a soft segment. The composition, morphology, phase transition behavior and thermal properties of the prepared CPCMs have been elucidated by a wide range of techniques. Investigation of FTIR spectra and SEM images reveal that the ‘free’ PEG and the PU copolymer network within the CPCMs have good compatibility and high affinity due to the noncovalent interactions. Polarized light optical microscopy shows that the CPCMs produce smaller spherulites than pristine PEG, and homogeneous nucleation was prevalent during the crystallization process. Due to the dual-phase transition of the CPCMs (the solid–liquid phase transition of ‘free’ PEG and solid–solid phase transition of the PU matrix) occurring within the same, narrow temperature window, the CPCMs have far higher heat storage density compared with that of traditional shape-stabilized PCMs with the same ‘free’ PEG content. Importantly, thermal cycling and thermogravimetric analyses show that the CPCMs have good reusability and excellent thermal stability for potential use in thermoregulation or energy storage applications.",
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Binary shape-stabilized phase change materials based on poly(ethylene glycol)/polyurethane composite with dual-phase transition. / Chen, Changzhong; Chen, Jun; Jia, Yifan; Topham, Paul D.; Wang, Linge.

In: Journal of Materials Science, 20.08.2018.

Research output: Contribution to journalArticle

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