A Study of Manufacturing Processes of Composite Form-Stable Phase Change Materials Based on Ca(NO3)2–NaNO3 and Expanded Graphite

Ren, Yaoyu; Xu, Chao; Wang, Tieying; Tian, Ziqian; Liao, Zhirong

doi:10.3390/ma13235368

Cited by 10 publications

(5 citation statements)

References 32 publications

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“…Liu et al [31] also demonstrated that increasing the porosity or decreasing the pore size could effectively increase the infiltration ratio of inorganic salt. Both the sintering temperature and impregnation temperature during the preparation process affect the CPCMs' thermal properties [32]. The former is a key factor in regulating the pore structure of the ceramic carrier, while the latter ensures the loading.…”

Section: Process Flow For Mixed Impregnation [19] (Reprinted With Per...mentioning

confidence: 99%

“…For the cold pressing-sintering process, the ratio between the materials, the amount of molding pressure, and the sintering temperature all have an important effect on the CPCMs' mechanical and thermophysical properties [40]. Qin et al [32,41] investigated the Na 2 SO 4 /diatomite CPCMs ratio. It was finally determined that CPCMs containing 45% diatomite were optimal in terms of energy density, leakage prevention, and mechanical strength.…”

Section: Energy Consumption Conversion Storage and Efficiencymentioning

confidence: 99%

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Medium-High Temperature Composite Phase Change Materials Based on Porous Ceramics

Qiu,

2024

Energy Consumption, Conversion, Storage, and Efficiency

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Medium-high temperature thermal energy storage usually uses composite phase change materials (CPCMs) composed of inorganic salts and porous skeletons, due to their high energy density, wide phase change temperature range, and stable physical/chemical properties. Inorganic salts provide enough heat storage capacity, and the porous skeleton is a stable packaging carrier that solves the low thermal conductivity and easy leakage of the former. Compared with alloy matrices, porous ceramics have higher corrosion resistance, economic benefits, and more stable thermal performance, which is more suitable for medium-high temperature thermal engineering applications. This chapter focuses on the medium-high temperature CPCMs based on the porous ceramic matrix, including the preparation process and thermal properties of CPCMs, the material types and selection principles of porous ceramic, and the system-level comprehensive study and application. This work aims to provide a coupling relationship between porous ceramics and inorganic salts so that the reader can obtain the ideal CPCMs in a specific application.

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Section: Process Flow For Mixed Impregnation [19] (Reprinted With Per...mentioning

confidence: 99%

Section: Energy Consumption Conversion Storage and Efficiencymentioning

confidence: 99%

Medium-High Temperature Composite Phase Change Materials Based on Porous Ceramics

Qiu,

2024

Energy Consumption, Conversion, Storage, and Efficiency

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“…Recent study shows that PCMs were prepared by molten salt/expanded graphite FSPCMs [93]. Molten salts, obtained from fusion of inorganic salt, are most promising fluids for storage of sensible and latent heat.…”

Section: Composite Pcm With Two Phase Transition Temperaturesmentioning

confidence: 99%

Recent advances in phase change materials for thermal energy storage-a review

Venkateswarlu¹,

Konijeti

2021

J Braz. Soc. Mech. Sci. Eng.

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The research on phase change materials (PCMs) for thermal energy storage systems has been gaining momentum in a quest to identify better materials with low-cost, ease of availability, improved thermal and chemical stabilities and eco-friendly nature. The present article comprehensively reviews the novel PCMs and their synthesis and characterization techniques for improving the properties and long-term storage capabilities. They include eco-friendly PCMs based on wood and tree fruit oils, microPCMs, nanoconfinement of organic PCMs, metal organic PCMs, bio-based PCMs, metal organic framework (MOF) PCMs and form-stable PCMs with gelators. The novel approaches such as cryogenically treated microencapsulated PCMs and treating them with photo-switching dopants to improve the properties are also presented. This review provides the useful insights about recent advances in the field of PCMs. The phase change slurries can effectively improve the thermal performance of photovoltaic/thermal systems. The thermal conductivity of PCMs can be enhanced significantly by PCM slurries, MOFs, exfoliated graphite nanoplatelets and composite PCMs. Optical control of PCMs by doping them with azobenzene dopants is found to be the most promising technique to improve the thermal stability and long-term storage capacity of PCMs. Cyclic cryogenic treatment by liquid nitrogen followed by heat treatment of PCMs can improve the latent heat, thermal and chemical stabilities significantly. The insightful information presented in this article can serve as an important tool for the researchers in the field of PCMs research to further innovate the technology in different applications such as thermal management of buildings, solar energy storage and cryogenic storage etc.

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“…An important point is that because most fillers are chemically inert, the interface interaction with the polymer matrix is weak, resulting in poor dispersion of the filler in the matrix, a tendency of accumulation, and higher interface thermal resistance. − In this case, optimization of the fillers’ thermal conductivity is not possible. Many strategies have been used to conduct surface modification of fillers. − The coating nanolayer on the filler surface is considered an effective surface modification method to improve the interfacial bonding force between the filler and the polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Multiwalled Expanded Graphite Coated with Nanometer-Thick Silica Layers for Thermal Management

Liu

et al. 2022

ACS Appl. Nano Mater.

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Thermal management materials utilized in electronic devices are vital components of both future electronics such as flexible electronics and technologies including artificial intelligence. In this work, nanosilica-coated multiwalled expanded graphite (EG-SiO 2 ) is synthesized via a solgel method and subsequently incorporated into the VMQ matrix. The less stiff nanosilica intermediate shell on the EG alleviates the modulus mismatch between the EG and VMQ and improves their interaction. Consequently, the thermal conductivity of the EG-SiO 2 -VMQ composites is increased by 394% (0.89 Wm −1 K −1 ) and 705% (1.45 Wm −1 K −1 ) compared to pure VMQ (0.18 Wm −1 K −1 ) at low filler loadings of 5 and 10 wt%, respectively. In addition, the composites have intermediate insulation properties (10 12 Ω•cm). This is because the SiO 2 nanolayer on the EG surface can inhibit electron transfer in the composites and act as an interception point for the conductive path. This work demonstrates that EG-SiO 2 -VMQ has enormous potential for use in fabricating polymer composites with high thermal conductivity and outstanding insolation capability, which can be utilized in aerospace, telecommunications, and mobile electronic devices.

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A Study of Manufacturing Processes of Composite Form-Stable Phase Change Materials Based on Ca(NO3)2–NaNO3 and Expanded Graphite

Cited by 10 publications

References 32 publications

Medium-High Temperature Composite Phase Change Materials Based on Porous Ceramics

Medium-High Temperature Composite Phase Change Materials Based on Porous Ceramics

Recent advances in phase change materials for thermal energy storage-a review

Multiwalled Expanded Graphite Coated with Nanometer-Thick Silica Layers for Thermal Management

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