Preparation and Characterization of Lauric–Myristic Acid/Expanded Graphite as Composite Phase Change Energy Storage Material

Zhou, Demin; Yuan, Jiawei; Xiao, Xianghua; Liu, Yicai

doi:10.1155/2021/1828147

Cited by 10 publications

(4 citation statements)

References 46 publications

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“…Liu et al 42 evaluated the applicability of capric acid-stearic acid/EG CPCM in low-temperature energy storage and found that it has good TCU and stable thermal and chemical properties. Zhou et al 43 compounded a lauric acid-myristic acid binary eutectic mixture into EG by physical adsorption method to prepare LA-MA/EG with a phase transition temperature of 33.4 °C and enthalpy of 171.1 J/g. This material is suitable for applications in buildings to save energy consumption.…”

Section: Introductionmentioning

confidence: 99%

Thermal Performances and Stability of Capric Acid–Stearic Acid–Paraffin Wax Adsorbed into Expanded Graphite in Vacuum Conditions

Guo,

Fei,

et al. 2024

J. Phys. Chem. C

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A new form-stable composite phase change material (CPCM) of capric acid-stearic acid-paraffin wax/expanded graphite (CSPW/EG) was prepared by vacuum adsorption. CSPW has a minimum crystallization temperature of 21.9 °C at the eutectic mass proportion of 74.7:8.3:17 by the step cooling curve method and has a phase change temperature of 25.27 °C and an enthalpy of 126.82 J/g by differential scanning calorimetry (DSC). The mixing proportion of CSPW to EG was determined to be 10:1 based on the enthalpy change and leakage of CPCMs; the enthalpy and phase transition temperature of CSPW/EG were 119.26 J/g and 27.14 °C, respectively. The microstructure, crystal structure, and chemical structure of CSPW/EG were characterized by using scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), and X-ray diffraction (XRD). The initial weight loss temperature of CSPW/EG was 159.8 °C, which is far beyond the working temperature. The heat storage-release experiments and 1000 melting−solidification cycles also confirmed that CSPW/EG has excellent heat energy storage and temperature control ability, thermal reliability, and great potential in practical engineering heat storage applications.

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Section: Introductionmentioning

confidence: 99%

Thermal Performances and Stability of Capric Acid–Stearic Acid–Paraffin Wax Adsorbed into Expanded Graphite in Vacuum Conditions

Guo,

Fei,

et al. 2024

J. Phys. Chem. C

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“…33 Most studies focus on a few fatty acid binary eutectic mixture/expanded graphite (FABEM/EG) CPCMs, and systematic theoretical research and experimental characterization have not been carried out. In this paper, on the basis of our previous research, 23,34,35 10 FABEM/EG CPCMs were prepared by the physical adsorption method with fatty acid binary eutectic mixtures as PCMs and expanded graphite as the substrate material. The maximum absorption mass ratio (MaxAMR) of the FABEM in CPCMs is determined.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Thermal Performance of Fatty Acid Binary Eutectic Mixture/Expanded Graphite Composites as Form-Stable Phase Change Materials for Thermal Energy Storage

Zhou

Xiao

2023

ACS Omega

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A series of fatty acid binary eutectic mixture/expanded graphite (FABEM/EG) composite phase change materials (CPCMs) were prepared by absorbing a liquid FABEM into the EG. The thermal properties, thermostability, and thermoreliability were determined by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and thermal cycling tests, respectively. Fourier transform infrared spectrometry (FT-IR) and scanning electron microscopy (SEM) were used to analyze the chemical structure and microstructure, respectively. Thermal conductivity measurements and heat storage/release experiments were carried out to study the heat transfer performance. The DSC test results show that the phase transition temperatures and latent heat of these CPCMs are in the range of 17.8–55.2 °C and 134.9–176.2 J/g, respectively. FT-IR analysis indicates there is only a simple physical adsorption between EG and the PCM and no chemical reaction occurs. SEM results show that the fatty acid binary eutectic mixtures are well adsorbed in the pores of EG, and EG can provide a certain mechanical strength and prevent phase change materials from leaking. The thermal conductivity measurement and heat storage/release experiment show that the addition of EG greatly improves the thermal conductivities of the CPCMs. TGA test results and thermal cycle tests show that the CPCMs have excellent thermal stability and long-term cycling thermal reliability.

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“…In order to improve the shape-stability of PCM, a number of from-stable PCMs have been fabricated by impregnating PCM into porous substitute, such as expanded graphite [8][9][10][11], montmorillonite [12], calcium silicate [13], diatomite [14] and wood [15,16]. Wood with hierarchical and multi-porous structure, in recent years, has been used as a porous carrier for encapsulating PCM due to the low cost, free pollution and low carbon emission [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of wood-based phase change material with high photothermal conversion efficiency

Weng

Lin

Chen

et al. 2023

Mater. Res. Express

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Phase change materials attract tremendous interest for building energy conservation due to their auto-temperature regulation and thermal energy storage capacity. However, its practical application is hindered due to the leakage problem and poor photothermal conversion efficiency. To address these issues, a scalable wood-based phase change material was prepared by impregnating polyethylene glycol (PEG) into Fe3O4 doped wood particles and subsequent a hot press in this study. PEG was encapsulated by wood particles through its abundant pore structure and leakage rate of prepared wood-based phase change material (FWPCM) was only 2.9%, which solved the leakage problem effectively. FWPCM presented high latent heat of 73 J/g and slowed down the temperature change obviously. Addition of Fe3O4 powder endowed FWPCM a high photothermal conversion efficiency and thermal conductivity (0.3545 W/(m*K) was increased by 125% compared to PW. So FWPCM had potential to be used as building engineering material for energy collecting, storage and conversion benefited by its great thermal performance, superior durability, simple preparing process and acceptable mechanical property.

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Preparation and Characterization of Lauric–Myristic Acid/Expanded Graphite as Composite Phase Change Energy Storage Material

Cited by 10 publications

References 46 publications

Thermal Performances and Stability of Capric Acid–Stearic Acid–Paraffin Wax Adsorbed into Expanded Graphite in Vacuum Conditions

Thermal Performances and Stability of Capric Acid–Stearic Acid–Paraffin Wax Adsorbed into Expanded Graphite in Vacuum Conditions

Preparation and Thermal Performance of Fatty Acid Binary Eutectic Mixture/Expanded Graphite Composites as Form-Stable Phase Change Materials for Thermal Energy Storage

Synthesis and characterization of wood-based phase change material with high photothermal conversion efficiency

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