Preparation and characterization of polyethylene glycol‐based form‐stable phase change materials supported by poly (vinyl formal) foams

Chen, Kexuan; Liu, Yuan; He, Rujie; Wang, Qi

doi:10.1002/app.52625

Cited by 4 publications

(3 citation statements)

References 30 publications

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“…Chen et al [ 43 ] proposed PCM based on the poly(ethylene glycol) shape stabilized with poly(vinyl formal) (PVF). The phase transition enthalpy of the PEG/PVF systems ranges from 104.1 to 158.4 J/g.…”

Section: Flame-retarded Pcmsmentioning

confidence: 99%

Fire Retardant Phase Change Materials—Recent Developments and Future Perspectives

2023

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The accumulation of thermal energy in the form of latent heat of phase transition using phase change materials (PCMs) is one of the most attractive and studied research areas with huge application potential in both passive and active technical systems. The largest and most important group of PCMs for low-temperature applications are organic PCMs, mainly paraffins, fatty acids, fatty alcohols, and polymers. One of the major disadvantages of organic PCMs is their flammability. In many applications such as building, battery thermal management, and protective insulations, the crucial task is to reduce the fire risk of flammable PCMs. In the last decade, numerous research works have been performed to reduce the flammability of organic PCMs, without losing their thermal performance. In this review, the main groups of flame retardants, PCMs flame retardation methods as well as examples of flame-retarded PCMs and their application areas were described.

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Section: Flame-retarded Pcmsmentioning

confidence: 99%

Fire Retardant Phase Change Materials—Recent Developments and Future Perspectives

2023

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“…However, as a solid–liquid PCM, PEG is subject to leakage problem in melting process, which hampers the application of the material in many areas 17–19 . To address this issue, PEG is always linked with multifunctional reagents to form crosslinking structure giving rise to PEG‐based solid–solid PCMs (SSPCMs), 20–22 or combined with supporting materials obtaining PEG‐based form‐stable PCMs (FSPCMs) 23–25 . These PEG‐based PCMs retain, or partially retain the aforementioned advantages of pure PEG.…”

Section: Introductionmentioning

confidence: 99%

An intrinsic antistatic polyethylene glycol‐based solid–solid phase change material for thermal energy storage and thermal management

Wu,

Zhang,

Deng

et al. 2024

Polymers for Advanced Techs

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Polyethylene glycol (PEG) is an important and popular phase change material (PCM), but is not a good antistatic material, which would cause the accumulation of static electricity and electrostatic discharge when used for the thermal energy storage and thermal management of electrical devices. Herein, we prepared a PEG‐based solid–solid PCM (SSPCM) with good antistatic property by introducing an ionic liquid onto the macromolecular chains. This SSPCM is in solid state even at 90°C, avoiding the leakage issue of pure PEG. Its latent heat values in the melting and solidifying processes are 56.2 and 30.6 J g−1, respectively. Additionally, this SSPCM has good thermal stability and thermal reliability for thermal storage and thermal management according to thermogravimetric and thermal cycling tests. The volume‐ and surface resistivity of the SSPCM at ambient temperature are 108.87 Ω m and 108.92 Ω, respectively, showing good antistatic performance.

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“…It is an easily available and low-cost substance that is chemically stable and nontoxic with a high heat storage capacity in a relatively narrow temperature range. Polymers and organic gels are used mainly as matrices for creating PCMs [ 43 , 44 , 45 , 46 ] as they can act as a supporting structure that allows for keeping their shape. In the case of paraffin wax, thermoplastic polymer matrices have previously been used to impart form stability, e.g., high-density polyethylene (HDPE) to melt and mix with wax at high temperatures [ 47 ].…”

Section: Introductionmentioning

confidence: 99%

Epoxy Phase-Change Materials Based on Paraffin Wax Stabilized by Asphaltenes

Ilyina,

Vlasova,

Gorbunova

et al. 2023

Polymers

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The usual problem of meltable phase-change agents is the instability in their form upon heating, which can be solved by placing them into a continuous polymer matrix. Epoxy resin is a suitable medium for dispersing molten agents, but it is necessary to make the obtained droplets stable during the curing of the formed phase-change material. This work shows that molten paraffin wax forms a Pickering emulsion in an epoxy medium and in the presence of asphaltenes extracted from heavy crude oil. Theoretical calculations revealed the complex equilibrium in the epoxy/wax/asphaltene triple system due to their low mutual solubility. Rheological studies showed the viscoplastic behavior of the obtained dispersions at 25 °C, which disappears upon the heating and melting of the paraffin phase. Wax and asphaltenes increased the viscosity of the epoxy medium during its curing but did not inhibit cross-linking or reduce the glass transition temperature of the cured polymer. As a result of curing, it is possible to obtain phase-change materials containing up to 45% paraffin wax that forms a dispersed phase with a size of 0.2–6.5 μm. The small size of dispersed wax can decrease its degree of crystallinity to 13–29% of its original value, reducing the efficiency of the phase-change material.

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Preparation and characterization of polyethylene glycol‐based form‐stable phase change materials supported by poly (vinyl formal) foams

Cited by 4 publications

References 30 publications

Fire Retardant Phase Change Materials—Recent Developments and Future Perspectives

Fire Retardant Phase Change Materials—Recent Developments and Future Perspectives

An intrinsic antistatic polyethylene glycol‐based solid–solid phase change material for thermal energy storage and thermal management

Epoxy Phase-Change Materials Based on Paraffin Wax Stabilized by Asphaltenes

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