Synthesis of the polyethylene glycol solid-solid phase change materials with a functionalized graphene oxide for thermal energy storage

Wang, Feng; Zhang, Ping; Mou, Yongren; Kang, Ming; Liu, Min; Song, Lixian; Lu, Ai; Rong, Jianzhong

doi:10.1016/j.polymertesting.2017.09.005

Cited by 54 publications

(16 citation statements)

References 39 publications

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“…As a widely used thermal insulation material, the heat transfer efficiency of the PUF is the most important property in the application of the material [22,23]. The heat transfer efficiency of PUF is characterized by thermal conductivity [24].…”

Section: The Thermal Conductivities Of the Pufsmentioning

confidence: 99%

The Influence of Environmentally Friendly Flame Retardants on the Thermal Stability of Phase Change Polyurethane Foams

Liu

2020

Materials

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To improve thermal insulation, microencapsulated phase change materials (micro-PCMs), expandable graphite (EG), and ammonium polyphosphate (APP) were introduced into polyurethane foam (PUF) to enhance the thermal stability and improve the thermal insulation behavior. The morphology of the PUF and micro-PCM was studied using a scanning electronic microscope (SEM), while the thermophysical properties of the PUF were investigated using a hot disk thermal constants analyzer and differential scanning calorimetry (DSC). The thermal stability of the PUF was investigated by thermogravimetric analysis (TGA), and the gas products volatilized from the PUF were analyzed by thermogravimetric analysis coupled with Fourier transform infrared spectrometry (TGA-FTIR). The results revealed that the thermal conductivities of the PUF were reduced because micro-PCM is effective in absorbing energy, showing that the PUF functions not only as a thermal insulation material but also as a heat sink for energy absorption. Moreover, the EG and APP were found to be effective in improving the thermal stabilities of the PUF, and the optimized formulation among EG, APP, and micro-PCMs in the PUF showed a significant synergistic effect.

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Section: The Thermal Conductivities Of the Pufsmentioning

confidence: 99%

The Influence of Environmentally Friendly Flame Retardants on the Thermal Stability of Phase Change Polyurethane Foams

Liu

2020

Materials

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“…Thus, certain carbon-based nanostructures exhibit thermal conductivities much higher than metallic or metal oxide nanoparticles [ 27 ]. Regarding PCMs, expanded carbon based microstructures or nanostructures have proven to be remarkably effective as thermal conductivity enhancers and shaper stabilizers of different phase change materials such as paraffins [ 28 , 29 , 30 , 31 ], fatty acids [ 32 , 33 , 34 , 35 ], or polymers [ 25 , 36 , 37 , 38 , 39 , 40 , 41 , 42 ], with acceptable reductions in latent storage heat. In the case of poly(ethylene glycols), Wang et al [ 36 ] reported reductions in melting temperature of PEG 6000—based NePCMs with the addition of different surface-functionalized graphene oxides.…”

Section: Introductionmentioning

confidence: 99%

PEG 400-Based Phase Change Materials Nano-Enhanced with Functionalized Graphene Nanoplatelets

et al. 2017

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This study presents new Nano-enhanced Phase Change Materials, NePCMs, formulated as dispersions of functionalized graphene nanoplatelets in a poly(ethylene glycol) with a mass-average molecular mass of 400 g·mol−1 for possible use in Thermal Energy Storage. Morphology, functionalization, purity, molecular mass and thermal stability of the graphene nanomaterial and/or the poly(ethylene glycol) were characterized. Design parameters of NePCMs were defined on the basis of a temporal stability study of nanoplatelet dispersions using dynamic light scattering. Influence of graphene loading on solid-liquid phase change transition temperature, latent heat of fusion, isobaric heat capacity, thermal conductivity, density, isobaric thermal expansivity, thermal diffusivity and dynamic viscosity were also investigated for designed dispersions. Graphene nanoplatelet loading leads to thermal conductivity enhancements up to 23% while the crystallization temperature reduces up to in 4 K. Finally, the heat storage capacities of base fluid and new designed NePCMs were examined by means of the thermophysical properties through Stefan and Rayleigh numbers. Functionalized graphene nanoplatelets leads to a slight increase in the Stefan number.

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“…The maximum weight loss was observed at 350 °C. The main decompositions products of PEG are combustible products, aldehydes and ether linkages . Azido‐PEGDGE exhibited one decomposition range at 270–450 °C.…”

Section: Results Ad Discussionmentioning

confidence: 99%

Poly(ethylene glycol)/Polyvinyl chloride Composite Form‐Stable Phase‐Change Materials by the Azide‐Alkyne Click Reaction

Oktay

2018

ChemistrySelect

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Thermal energy storage has become a key area in modern technology. Polyethylene glycol (PEG) is known to be an extremely effective solid-liquid phase change material (PCM). For efficient energy storage, alternative liquid-solid PCMs without encapsulation were designed. In particular, a series of PCMs, comprising PEG-stearate and PEG-stearate-Polyvinyl chloride (PVC), were prepared by the azide-alkyne cycloaddition click reaction. The click reactions of azido-PEG, azido-PVC, and alkynyl stearate were carried out. The prepared polymers, PEG-stearate and PEG-stearate-PVC PCMs were characterized by Fourier-transform infrared spectroscopy (FTIR) spectroscopy. The latent heat and thermal stability of PCMs were investigated by Differential Scanning Calorimetry (DSC) and Thermogravimetric analyzer (TGA). DSC results revealed that PCMs exhibit latent heat values ranging from 80 to 104 J/g at -2 and 46°C. In addition, PCMs exhibited high thermal stability with the increase in the content of PVC.

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Synthesis of the polyethylene glycol solid-solid phase change materials with a functionalized graphene oxide for thermal energy storage

Cited by 54 publications

References 39 publications

The Influence of Environmentally Friendly Flame Retardants on the Thermal Stability of Phase Change Polyurethane Foams

The Influence of Environmentally Friendly Flame Retardants on the Thermal Stability of Phase Change Polyurethane Foams

PEG 400-Based Phase Change Materials Nano-Enhanced with Functionalized Graphene Nanoplatelets

Poly(ethylene glycol)/Polyvinyl chloride Composite Form‐Stable Phase‐Change Materials by the Azide‐Alkyne Click Reaction

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