Large-scale fabrication of expanded graphite aerogel-based phase change material composite for efficient solar harvesting

Cui, Hongzhi; Wang, Pizhuang; Yang, Haibin; Yuan, Shyan-Ming

doi:10.1016/j.est.2022.105890

Cited by 12 publications

(4 citation statements)

References 59 publications

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“…The PEG content included within the porous carbon-based matrices is always very high, generally well above 80% by weight. As already reported, the use of carbon-based matrices (such as single-wall carbon nanotubes [77] or expanded graphite [21,25,78]) allows a substantial increase in the conductivity of the final PCM. This can promote and accelerate the phase change process.…”

Section: Peg-based Pcms With a Carbon Matrixmentioning

confidence: 66%

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Selection of PEG-Matrix Combinations to Achieve High Performance Form-Stable Phase Change Materials for Building Applications

Sarcinella,

Frigione

2024

Coatings

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The construction sector’s pursuit of sustainability, driven by growing concerns about climate change and resource depletion, requires innovative solutions to reduce the energy consumption necessary to ensure thermal comfort in buildings. The introduction of phase change materials (PCMs) in construction elements represents an effective solution to these problems. PCMs are, in fact, able to regulate internal temperature by storing and releasing thermal energy during their phase transitions. In particular, polyethylene glycol (PEG)-based organic PCMs offer high heat storage capacity, compatibility with building materials, and minimal environmental impact. They are often used in building applications incorporated in an inert matrix, using the “form-stable method”. This article critically examines various matrices proposed in the existing literature to realize PEG-based PCMs, with the aim of analyzing their influence on the final characteristics of any PCM. In addition, an attempt to correlate the quantity of PEG with the heat stored and released by the PCM is presented, using a linear regression model applied to groups of matrices of the same chemical nature. The results of these analyses would, in fact, provide useful indications for an optimal choice of the PEG/matrix system capable of responding to specific application needs, particularly in the building sector.

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Section: Peg-based Pcms With a Carbon Matrixmentioning

confidence: 66%

“…Expanded graphite-based aerogel (EGA) was employed as a matrix of a PEG4000based PCM [78]. Due to its low thermal conductivity, EG was integrated with aerogel obtaining an EGA composite characterized by a microporous structure able to include PEG, as shown in Figure 6.…”

Section: Peg-based Pcms With a Carbon Matrixmentioning

confidence: 99%

Selection of PEG-Matrix Combinations to Achieve High Performance Form-Stable Phase Change Materials for Building Applications

Sarcinella,

Frigione

2024

Coatings

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“…In addition, if the phase transition of the PCM in question is solid to liquid, it will probably be necessary to use a material that acts as a capsule or support for the PMC to prevent its leakage, which could even hurt the mechanical properties of the pavement [ 12 , 13 ]. In this case, the literature fundamentally presents two possibilities: (i) encapsulation (by melamine–formaldehyde resin [ 14 ], acrylic-based polymers [ 15 ], and CaCO 3 [ 16 ], among others) or (ii) impregnation using porous materials (silica fume [ 17 ], diatomite [ 18 ], expanded graphite, and others [ 19 ]) or crystalline/lamellar materials (expanded graphite [ 20 ], reduced graphene oxide [ 21 ], and montmorillonite [ 22 ] ( Figure 1 ).…”

Section: Introductionmentioning

confidence: 99%

Advancements in Phase Change Materials in Asphalt Pavements for Mitigation of Urban Heat Island Effect: Bibliometric Analysis and Systematic Review

Pinheiro,

Landi,

Lima

et al. 2023

Sensors

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This research presents a dual-pronged bibliometric and systematic review of the integration of phase change materials (PCMs) in asphalt pavements to counteract the urban heat island (UHI) effect. The bibliometric approach discerns the evolution of PCM-inclusion asphalt research, highlighting a marked rise in the number of publications between 2019 and 2022. Notably, Chang’an University in China has emerged as a leading contributor. The systematic review addresses key questions like optimal PCM types for UHI effect mitigation, strategies for PCM leakage prevention in asphalt, and effects on mechanical properties. The findings identify polyethylene glycols (PEGs), especially PEG2000 and PEG4000, as prevailing PCMs due to their wide phase-change temperature range and significant enthalpy during phase transitions. While including PCMs can modify asphalt’s mechanical attributes, such mixtures typically stay within performance norms. This review emphasises the potential of PCMs in urban heat management and the need for further research to achieve optimal thermal and mechanical balance.

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“…At present, there are various methods that try to solve the leakage problem of PCMs, which generally consist of porous solid supports capable of PCMs entrapment. [9] Methods for obtaining leakage-free materials include the adsorption method, [10] microencapsulation method, [11] sol-gel method, [12] or the chemical method. [13] 4…”

Section: Introductionmentioning

confidence: 99%

PLA aerogel as a universal support for the typical organic phase change energy storage materials

Yin,

Yang,

López

et al. 2023

Journal of Energy Storage

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Large-scale fabrication of expanded graphite aerogel-based phase change material composite for efficient solar harvesting

Cited by 12 publications

References 59 publications

Selection of PEG-Matrix Combinations to Achieve High Performance Form-Stable Phase Change Materials for Building Applications

Selection of PEG-Matrix Combinations to Achieve High Performance Form-Stable Phase Change Materials for Building Applications

Advancements in Phase Change Materials in Asphalt Pavements for Mitigation of Urban Heat Island Effect: Bibliometric Analysis and Systematic Review

PLA aerogel as a universal support for the typical organic phase change energy storage materials

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