Preparation and application of high-temperature composite phase change materials

Zhang, Haojie; Zhang, Xiaoguang; Pan, De’an; Yu-hang, AI; Chen, Yousheng

doi:10.1016/j.est.2023.107669

Cited by 12 publications

(1 citation statement)

References 89 publications

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“…One of the most practical strategies in responding to the above shortcomings is the application of phase change materials (PCMs) for energy storage. In typical processes, the unstable supplied renewable energies could be transferred into thermal energy for storage and are released by transitions in the phase of the PCMs when needed [ 4 ]. Due to the excellent management of thermal energy, the PCMs are widely used in building energy efficient, solar thermal energy recovery, industrial waste heat recovery, and thermal insulation materials.…”

Section: Introductionmentioning

confidence: 99%

Expanded Vermiculite/D-Mannitol as Shape-Stable Phase Change Material for Medium Temperature Heat Storage

Lv,

Fan,

Han

et al. 2023

Materials

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Aiming to promote the application of D-mannitol in the field of phase change thermal storage, obstacles, including low thermal storage efficiency and high supercooling, should be properly disposed of. The adoption of adaptable and low-cost supporting materials to make shape-stable phase change materials (ss-PCMs) affordable is a primary solution to solve the above shortcomings. In this study, high-performance ss-PCM for effective medium-temperature heat storage was prepared using expanded vermiculite as the support for D-mannitol preservation. Among the three candidates that treated the raw vermiculite by dilute acid, calcination, and microwave heating, the calcinated expanded vermiculite (CV) was characterized as the most suitable one. After impregnating D-mannitol into the CV carrier by vacuum, a melting enthalpy of 205.1 J/g and a crystallization enthalpy of 174.1 J/g were achieved by the as-received CV/D-mannitol ss-PCM. Additionally, the supercooling of the ss-PCM was reduced to 45.6 °C. The novel CV/D-mannitol ss-PCM also exhibited excellent reusability and stability. All the findings indicate that the abundant and inexpensive CV exhibited great potential as the supporting material for D-mannitol-based ss-PCMs, which allow effective waste heat recovery and temperature regulation.

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Section: Introductionmentioning

confidence: 99%

Expanded Vermiculite/D-Mannitol as Shape-Stable Phase Change Material for Medium Temperature Heat Storage

Lv,

Fan,

Han

et al. 2023

Materials

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Thermal Expansion Challenges and Solution Strategies for Phase Change Material Encapsulation: A Comprehensive Review

Xu,

Shi,

et al. 2024

Adv Funct Materials

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Phase change materials (PCMs) have attracted increasing attention due to their efficient heat storage capability and small temperature fluctuation. And encapsulation has been recognized as an effective method to solve issues such as corrosion and leakage. For a long time, restricted by thermal expansion, encapsulation of PCMs has remained in the low‐temperature field and liquid‐state coating. In recent years, with the expansion of PCMs encapsulation into the medium and high temperature field and the development of solid‐state coating technology, encapsulation methods that consider thermal expansion have greatly improved the cycle life of encapsulated PCMs and make solid‐state coating of medium and high temperature PCMs possible. Herein, first, this paper summarizes the thermal expansion rates of common core and shell materials, as well as the thermal expansion behavior and stress analysis within confined spaces, proposing the necessity to solve thermal expansion issues. Subsequently, the solution strategies for solving thermal expansion issues in both macrocapsules and microcapsules are introduced. On this basis, the advantages and disadvantages of each strategy have been compared, and the applications of encapsulated PCMs after resolving thermal expansion issues have been introduced. Finally, the current issues, corresponding solutions, and future research directions have been put forward.

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Synthesis and characterization of cellulose nanofibers improved melamine formaldehyde resin shell microcapsules for phase change thermal storage materials

Jia,

Liu,

Wang

et al. 2024

J of Applied Polymer Sci

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A phase change microcapsule with n‐octadecane as the phase change core material and melamine formaldehyde resin as the wall material was successfully prepared by in situ polymerization using cellulose nanofibrillar filaments (CNF) as the emulsion stabilizer. The microencapsulation of phase change materials was characterized using scanning electron microscope, Fourier transform infrared spectroscopy x‐ray diffraction, differential scanning calorimetry, and thermogravimetric analysis. The microcapsules had a perfectly spherical morphology with a core‐shell microstructure. The findings revealed that the microcapsules up to the highest efficiency of encapsulation and energy storage of 59.1% and 58.5%, respectively, were achieved when the CNF addition was 0.2 wt%, the core‐to‐wall mass ratio was 3:3.69, and the stirring rate was 1000 r/min. This work uses CNF as an emulsion stabilizer instead of conventional emulsifiers, which reduces the burden on the environment and provides a sustainable method for thermal energy storage and conversion.

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Preparation and application of high-temperature composite phase change materials

Cited by 12 publications

References 89 publications

Expanded Vermiculite/D-Mannitol as Shape-Stable Phase Change Material for Medium Temperature Heat Storage

Expanded Vermiculite/D-Mannitol as Shape-Stable Phase Change Material for Medium Temperature Heat Storage

Thermal Expansion Challenges and Solution Strategies for Phase Change Material Encapsulation: A Comprehensive Review

Synthesis and characterization of cellulose nanofibers improved melamine formaldehyde resin shell microcapsules for phase change thermal storage materials

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