Preparation and characterization of carbon nanotube microcapsule phase change materials for improving thermal comfort level of buildings

Cheng, Jiaji; Zhou, Yue; Ma, Dan; Li, Shaoxiang; Zhang, Feng; Guan, Yu; Qu, Wenjuan; Yang, Jin; Wang, Dong

doi:10.1016/j.conbuildmat.2020.118388

Cited by 51 publications

(12 citation statements)

References 38 publications

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“…Cheng et al 122 prepared high thermal conductivity MPCM doped with CNTs and mixed it with rigid polyurethane foams (RPUF). Tests in the simulation room found that the maximum temperature of RPUF walls with 30% modified MPCMs was reduced by 11.5°C and 3.4°C, respectively, compared with pure RPUF and unmodified MPCMs.…”

Section: Application Of Mpcmsmentioning

confidence: 99%

Research progress on preparation, characterization, and application of nanoparticle‐based microencapsulated phase change materials

Lin

Zhang

et al. 2021

Int J Energy Res

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Summary As an energy storage material, microencapsulated phase change materials (MPCMs) have become a research hotspot in recent years due to their unique thermophysical properties. However, this material usually has limitations in terms of its performance, such as low encapsulation efficiency, leakage during phase change, poor cycle stability, and high degree of supercooling. To solve these problems, nanoparticle as‐modified material to improve the performance of MPCMs has attracted the attention of both domestic and overseas scholars. This paper aims to review the research progress of MPCMs modified by nanoparticle from three aspects: preparation, performance, and application. In this paper, the preparation method and principle of nanoparticles used for the modification of MPCMs are first introduced. Then, based on different properties (mechanical properties, thermal conductivity, thermal stability, and supercooling), the research works of nanoparticle‐modified MPCMs in recent years are reviewed. Finally, the practical applications of nanocomposite MPCM in the field of slurry, building, asphalt pavement, and battery thermal management are reported.

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Section: Application Of Mpcmsmentioning

confidence: 99%

Research progress on preparation, characterization, and application of nanoparticle‐based microencapsulated phase change materials

Lin

Zhang

et al. 2021

Int J Energy Res

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“…[ 12 , 13 , 14 ]. In particular, shape-stabilized phase change materials (SS-PCMs) consisting of one or several types of PCMs and a supporting porous matrix, such as graphite [ 15 ], carbon foam [ 16 ], or carbon nanotubes [ 17 ], are generally preferred. The investigations on PCMs mainly focus on the improvement of thermal conductivity [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Paraffin/Mesoporous Silica Shape-Stabilized Phase Change Materials for Building Thermal Insulation

Dong

Wang

et al. 2021

Materials

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The use of phase change materials (PCMs) is an attractive method for energy storage and utilization in building envelopes. Here, shape-stabilized phase change materials (SS-PCMs) were prepared via direct adsorption using mesoporous silica (MS) with different pore diameters as the support matrix. The leakage properties, microstructure, chemical structure, thermophysical properties, activation energy, thermal stability and thermal storage-release characteristics of paraffin and SS-PCMs were investigated. The results show that the maximum mass proportion of paraffin in SS-PCMs is 70% when the average pore diameter of mesoporous silica is 15 nm, and the phase change temperature and latent heat of the corresponding SS-PCM are 23.6 °C and 135.4 kJ/kg, respectively. No chemical reaction occurs between mesoporous silica and paraffin and the SS-PCMs exhibit high thermal stability. The high activation energy of the paraffin (70%)/MS1 SS-PCM verifies that the shape and thermal properties can be maintained stably during phase change conversions. The time required for SS-PCMs to complete the thermal storage and release process is reduced by up to 34.0% compared with that for pure paraffin, showing a decline in the thermal conductivity of SS-PCMs after the addition of mesoporous silica. Hence, the prepared paraffin/MS SS-PCMs, in particular paraffin (70%)/MS1 SS-PCM, can be used for storing thermal energy and regulating indoor temperature in buildings.

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“…Phase change materials (PCMs) can achieve latent energy storage and release by formation and breakage of molecular bonds during the physical state change process, and keep constant temperature at the same time. , PCMs are favorable to improving energy efficiency and achieving thermal regulation due to utilizing effectively latent heat and reducing the consumption of fossil energy, which is attracting widespread attention. , The most common solid–liquid PCMs possess dependable phase transition property, wide phase change temperature, and an acceptable commercial product price . PCMs have been exploited for storage media with extensive applications involving temperature-adjustable fibers and textiles, lithium batteries, solar energy utilization, waste heat recovery system, transportation, and so on. − In addition, microencapsulated PCMs (MicroPCMs) are quickly developing owing to the advantages of microencapsulation technology including avoiding leakage, improving thermal cycling stability, and preventing the reaction from the ambient circumstances. , MicroPCMs are prepared via using PCMs as the core materials and inorganic or organic materials as the packaging container. In the process of synthesizing microcapsules, shell materials have significant influence on their morphology, mechanical properties, and thermal properties .…”

Section: Introductionmentioning

confidence: 99%

“…6−9 In addition, microencapsulated PCMs (MicroPCMs) are quickly developing owing to the advantages of microencapsulation technology including avoiding leakage, improving thermal cycling stability, and preventing the reaction from the ambient circumstances. 10,11 MicroPCMs are prepared via using PCMs as the core materials and inorganic or organic materials as the packaging container. In the process of synthesizing microcapsules, shell materials have significant influence on their morphology, mechanical properties, and thermal properties.…”

Section: Introductionmentioning

confidence: 99%

Preparation, Morphology, and Thermal Performance of Microencapsulated Phase Change Materials with a MF/SiO₂ Composite Shell

Zhai

Zhang

2020

Energy Fuels

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A series of microencapsulated phase change materials with an organic/inorganic composite shell was designed for obtaining excellent thermal compactness and thermal stability. The capsule wall was obtained via hydrolyzing ethyl orthosilicate with melamine resin as the hard template to MF/SiO2 materials for encapsulation n-octadecane. The results of chemical analysis and structure characterizations indicated that MF/SiO2 microcapsules with an obvious core–shell microstructure were successfully fabricated. The thermal conductivity of MF/SiO2 microcapsules is raised to 30.05% via comparing with original microcapsules. The microcapsules obtained present excellent latent heat storage and release properties (ΔH m = 167.1 J·g–1). The enthalpy value of the synthetic microcapsule hardly changed from 164.5 to 162.9 J·g–1 after extraction, indicating that the microcapsules have distinguished sealing performance. In addition, the MF/SiO2 microcapsules still presented noteworthy thermal cycle durability.

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Preparation and characterization of carbon nanotube microcapsule phase change materials for improving thermal comfort level of buildings

Cited by 51 publications

References 38 publications

Research progress on preparation, characterization, and application of nanoparticle‐based microencapsulated phase change materials

Research progress on preparation, characterization, and application of nanoparticle‐based microencapsulated phase change materials

Preparation and Characterization of Paraffin/Mesoporous Silica Shape-Stabilized Phase Change Materials for Building Thermal Insulation

Preparation, Morphology, and Thermal Performance of Microencapsulated Phase Change Materials with a MF/SiO₂ Composite Shell

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Preparation and characterization of carbon nanotube microcapsule phase change materials for improving thermal comfort level of buildings

Cited by 51 publications

References 38 publications

Research progress on preparation, characterization, and application of nanoparticle‐based microencapsulated phase change materials

Research progress on preparation, characterization, and application of nanoparticle‐based microencapsulated phase change materials

Preparation and Characterization of Paraffin/Mesoporous Silica Shape-Stabilized Phase Change Materials for Building Thermal Insulation

Preparation, Morphology, and Thermal Performance of Microencapsulated Phase Change Materials with a MF/SiO2 Composite Shell

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Preparation, Morphology, and Thermal Performance of Microencapsulated Phase Change Materials with a MF/SiO₂ Composite Shell