Micro encapsulated &amp; form-stable phase change materials for high temperature thermal energy storage

Leng, Guanghui; Qiao, Gang; Zhu, Jianhua; Xu, Guizhi; Qin, Yue; Chang, Chun; Ding, Yulong

doi:10.1016/j.apenergy.2018.02.064

Cited by 137 publications

(35 citation statements)

References 52 publications

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“…The thermal stability is an important evaluation index of microcapsule when be used for thermal energy storage and temperature regulation . The thermogravimetry (TG) and differential thermogravimetry (DTG) curves of Micro‐P6 are described in Figure , and the temperature range is 25–600 °C.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and properties of microencapsulated phase change material with a urea–formaldehyde resin shell and paraffin wax core

Huo

Peng

Feng

2019

J of Applied Polymer Sci

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During this study, paraffin wax with low melting point was encapsulated in a urea-formaldehyde resin to prepare a novel microencapsulated phase change material (Micro-P6) for temperature regulation and thermal energy storage. The structure and properties of Micro-P6 were characterized by using Fourier transform infrared spectroscopy, differential scanning calorimeter, laser particle size analyzer, thermogravimetric analysis, contact angle analysis, and scanning electron microscope. The results indicated that the chemical structure of Micro-P6 meets the designed core-shell structure; and the paraffin wax with low melting point was successfully encapsulated by using urea-formaldehyde resin; and the Micro-P6 shows a spherical structure and rough surface, and the average size is 8.0-10.0 μm. Then, the performances of Micro-P6, such as core content, mechanical property, thermal conductivity and durability, were tested. Based on above characterization and performance test, it was indicated that the synthesized Micro-P6 could be used in the field of cementing and construction for temperature regulation and thermal energy storage. The applications of Micro-P6 in the field of cementing and construction will be completed in our next study.

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Section: Resultsmentioning

confidence: 99%

Synthesis and properties of microencapsulated phase change material with a urea–formaldehyde resin shell and paraffin wax core

Huo

Peng

Feng

2019

J of Applied Polymer Sci

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“…On the other hand, the thermal stability of the CaCl 2 •6H 2 O/diatomite composite was much better than this of pure salt hydrate and the stability of CaCl 2 •6H 2 O/diatomite/paraffin composite was increased further. Leng et al prepared the composite PCM/diatomite material combining mixing and sintering approaches and employing NaCl:KCl (1:1.02) binary eutectic mixture as a high-temperature PCM with the melting temperature of 665 • C and melting enthalpy of 259.6 J/g [103]. Depending on the mass fraction of molten salt eutectic, the resulted composites had the melting temperature from 659 to 661 • C and melting enthalpy from 127 J/g (50 wt% of salt) to 179.3 J/g (70 wt% of salt).…”

Section: Diatomite-based Pcm Compositesmentioning

confidence: 99%

Clay Composites for Thermal Energy Storage: A Review

et al. 2020

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The development of novel materials and approaches for effective energy consumption and the employment of renewable energy sources is one of the current trends in modern material science. With this respect, the number of researches is focused on the effective harvesting and storage of solar energy for various applications. Phase change materials (PCMs) are known to be able to store thermal energy of the sunlight due to adsorption and release of latent heat through reversible phase transitions. Therefore, PCMs are promising as functional additives to construction materials and paints for advanced thermoregulation in building and industry. However, bare PCMs have limited practical applications. Organic PCMs like paraffins suffer from material leakage when undergoing in a liquid state while inorganic ones like salt hydrates lack long-term stability after multiple phase transitions. To avoid this, the loading of PCMs in porous matrices are intensively studied along with the thermal properties of the resulted composites. The loading of PCMs in microcontainers of natural porous or layered clay materials appears as a simple and cost-effective method of encapsulation significantly improving the shape and cyclic stability of PCMs. Additionally, the inclusion of functional clay containers into construction materials allows for improving their mechanical and flame-retardant properties. This article summarizes the recent progress in the preparation of composites based on PCM-loaded clay microcontainers along with their future perspectives as functional additives in thermo-regulating materials.

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“…It can be seen that the stress first increases and then decreases with the increase in the axial strain. The maximum stress is corresponding to the 'rupture point', and thus the maximum stress can be referred to as compressive strength [12]. Both the measured compressive strength and the bearable maximum strain before rupture increase with the sintering pressure of the composite pellet.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…The formation process of composite materials also underwent uniaxial cold compression and high temperature sintering at 900 ℃ for an hour. They used the same method to fabricate NaNO 3 /diatomite composite materials at a sintering temperature of 370 ℃ which held for an hour [11] and NaCl-KCl/diatomite composite materials at a sintering temperature of 680 ℃ which also held for one hour [12]. They stated that the melted PCMs were absorbed into the nanoscale pores of diatomite in the fabrication process to prevent their leakage.…”

Section: Introductionmentioning

confidence: 99%

A novel low-temperature fabrication approach of composite phase change materials for high temperature thermal energy storage

Zhu

Cong

et al. 2019

Applied Energy

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Micro encapsulated & form-stable phase change materials for high temperature thermal energy storage

Cited by 137 publications

References 52 publications

Synthesis and properties of microencapsulated phase change material with a urea–formaldehyde resin shell and paraffin wax core

Synthesis and properties of microencapsulated phase change material with a urea–formaldehyde resin shell and paraffin wax core

Clay Composites for Thermal Energy Storage: A Review

A novel low-temperature fabrication approach of composite phase change materials for high temperature thermal energy storage

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