A form-stable phase change material based on intermolecular hydrogen bonding with a high chemical recycling rate

Shen, Xinyi; Liu, Yulin; Li, Na; Ju, Haiyan; Fu, Xiaowei; Jiang, Liang; Xiao, Yao; He, Ping; Lei, Jingxin

doi:10.1039/d4gc00324a

Cited by 1 publication

(2 citation statements)

References 36 publications

(41 reference statements)

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“…Also, the T m and T f of SPCMs were lower than those of the corresponding free PEGs. The reason for such a result may originate from the fact that the hydrogen bond-cross-linked network structure of the supramolecular polymer impedes the crystallization behavior of free PEGs, evidenced by broadening of the melting and crystallization peaks . The melting latent heat efficiency (η m ) and the freezing latent heat efficiency (η f ) of SPCMs were about 1 within the margin of error regardless of the free PEGs with different molecular weight, due to the free PEGs were distributed in the supramolecular polymer matrix in a form of linear polymers.…”

Section: Resultsmentioning

confidence: 99%

“…behavior of free PEGs, evidenced by broadening of the melting and crystallization peaks. 54 The melting latent heat efficiency (η m ) and the freezing latent heat efficiency (η f ) of SPCMs were about 1 within the margin of error regardless of the free PEGs with different molecular weight, due to the free PEGs were distributed in the supramolecular polymer matrix in a form of linear polymers.…”

Section: Synthesis and Structure Of Spcmsmentioning

confidence: 95%

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Enabling Supramolecular Phase Change Materials with High Latent Heat Ability and Recyclability

Liao,

Wei,

Chen

et al. 2024

Ind. Eng. Chem. Res.

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The design of supramolecular phase change materials (SPCMs) with both high latent heat and recyclability remains challenging via multivalent interactions such as hydrogen bonds. Herein, the SPCMs are developed by integrating linear polyethylene glycol (PEG) as phase change functional components into physically cross-linking networks formed via the multivalent interactions between linear supramolecular polymers of polyurethane, enabling a combination of high latent heat of 143.1 J/g and solvent-assisted recyclability. The SPCMs presented the tunable latent heat (87.3−143.1 J/g) and phase change temperature (36.4− 59.8 °C) via the tunable molecular weight and content of linear free PEGs. The SPCMs had much smaller spherulite size than the free PEG counterparts due to the effect of the supramolecular polymer on the crystallization behaviors of free PEGs in SPCMs. The supramolecular polymer network endowed the SPCMs with good thermal reliability, thermal stability, and nonleakage properties. Significantly, the solvent-assisted recycle of SPCMs were enabled via completely dissolving the SPCM in solvent and then removing the solvent. The design of SPCMs nicely realizes the combination of high latent heat and recycling, which will extend the application range of phase change materials.

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Section: Resultsmentioning

confidence: 99%

Section: Synthesis and Structure Of Spcmsmentioning

confidence: 95%

Enabling Supramolecular Phase Change Materials with High Latent Heat Ability and Recyclability

Liao,

Wei,

Chen

et al. 2024

Ind. Eng. Chem. Res.

Self Cite

View full text Add to dashboard Cite

show abstract

A form-stable phase change material based on intermolecular hydrogen bonding with a high chemical recycling rate

Abstract: The existing polyethylene glycol (PEG)-based phase change materials (PCMs) with recyclability are not chemically recyclable, as the raw materials of the PCMs cannot be obtained after the recycling. Herein, we...

Cited by 1 publication

References 36 publications

Enabling Supramolecular Phase Change Materials with High Latent Heat Ability and Recyclability

Enabling Supramolecular Phase Change Materials with High Latent Heat Ability and Recyclability

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