Microencapsulation of phase change materials with binary cores and calcium carbonate shell for thermal energy storage

Wang, Tingyu; Wang, Shuangfeng; Luo, Ruilian; Chen, Zhu; Akiyama, Tomohiro; Zhang, Zhengguo

doi:10.1016/j.apenergy.2016.03.037

Cited by 206 publications

(65 citation statements)

References 41 publications

(42 reference statements)

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“…Thermal conductivity is the major and fundamental property for the evaluation of EPCMs for efficient TES in various thermal systems. So far, various instruments have been utilised for the measurement of thermal conductivity of microcapsule/nanocapsule such as laser flash apparatus (LINSEIS LFA1000), TC3020 thermal conductivity meter, TC3000 thermal conductivity meter, Sweden Hot Disk thermal conductivity meter, and EKO HC‐110 thermal conductivity meter . The encapsulated capsules are pressed in a tablet form to measure the thermal conductivity of microcapsule/nanocapsule.…”

Section: Characteristics Evaluation Techniques Of Epcmsmentioning

confidence: 99%

The micro‐/nano‐PCMs for thermal energy storage systems: A state of art review

et al. 2019

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Summary With advancement in technology—nanotechnology, various thermal energy storage (TES) materials have been invented and modified with promising thermal transport properties. Solid‐liquid phase change materials (PCMs) have been extensively used as TES materials for various energy applications due to their highly favourable thermal properties. The class of PCMs, organic phase change materials (OPCMs), has more potential and advantages over inorganic phase change materials (IPCMs), having high phase change enthalpy. However, OPCMs possess low thermal conductivity as well as density and suffer leakage during the melting phase. The encapsulation technologies (ie, micro and nano) of PCMs, with organic and inorganic materials, have a tendency to enhance the thermal conductivity, effective heat transfer, and leakage issues as TES materials. The encapsulation of PCMs involves several technologies to develop at both micro and nano levels, called micro‐encapsulated PCMs (micro‐PCM) and nano‐encapsulated PCMs (nano‐PCM), respectively. This study covers a wide range of preparation methods, thermal and morphological characteristics, stability, applications, and future perspective of micro‐/nano‐PCMs as TES materials. The potential applications, such as solar‐to‐thermal and electrical‐to‐thermal conversions, thermal management, building, textile, foam, medical industry of micro‐ and nano‐PCMs, are reviewed critically. Finally, this review paper highlights the emerging future research paths of micro‐/nano‐PCMs for thermal energy storage.

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Section: Characteristics Evaluation Techniques Of Epcmsmentioning

confidence: 99%

The micro‐/nano‐PCMs for thermal energy storage systems: A state of art review

et al. 2019

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“…Compared with the polymer shell material, inorganic shell material shows high thermal conductivity, thermal and chemical stability, and mechanical strength. [25][26][27] Wang et al and Jiang et al 25,26 encapsulated the PCM into a CaCO 3 shell and found that these rigid shell microcapsules achieved thermal conductivity enhancement. Many studies have explored the introduction of different inorganic particles to polymer shell microcapsule systems such as silica (SiO 2 ), titania (TiO 2 ), Si 3 N 4 , and so on.…”

Section: Introductionmentioning

confidence: 99%

“…23,24 Microencapsulated PCM has been successfully prepared using alternative inorganic materials like CaCO 3 , TiO 2 , and graphene. [25][26][27] Wang et al and Jiang et al 25,26 encapsulated the PCM into a CaCO 3 shell and found that these rigid shell microcapsules achieved thermal conductivity enhancement. Ma et al 28 successfully synthesized microencapsulated PCMs (MEPCMs) with paraffin core and inorganic TiO 2 shell through in-situ hydrolysis and polycondensation of tetrabutyl titanate.…”

Section: Introductionmentioning

confidence: 99%

Phase change microcapsules with lead tungstate shell for gamma radiation shielding and thermal energy storage

et al. 2019

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Summary Novel microencapsulated phase change materials (MEPCMs) composed of the lead tungstate (PbWO4) shell and paraffin core were designed for shielding of gamma radiation as well as thermal energy storage. Such MEPCMs were prepared via self‐assembly methods and in‐situ precipitation. The PbWO4 shell with excellent photon attenuation can give the resulting MEPCMs an acceptable gamma radiation shielding capability. The chemical composition and structure of microcapsules samples were studied by X‐ray diffractometer (XRD) and Fourier‐transform infrared spectroscopy (FTIR). The effects of different core/shell mass ratios on the surface morphology and microstructure of the MEPCMs were determined by scanning electron microscopy (SEM), energy‐dispersive spectrometer (EDS), and transmission electronic microscopy (TEM). It was confirmed that the microcapsules exhibit a distinct core‐shell structure and a perfect spherical shape. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) were used to present thermal stability and thermal‐storage capability of MEPCMs. A high‐purity germanium gamma spectrometer to measure the attenuation coefficient of the microcapsules for gamma rays showed that the MECPMs has good γ‐rays‐shielding property. The multifunction microcapsules in this study have great potential applications for building energy conservation as well as wearable personal protection in nuclear energy engineering.

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“…To solve the problem of leakage in the melting state, a shape-stabilized PCM developed by microencapsulation of OD with a core-shell structure was prepared. In the existing research studies, the main shell materials are silica [9,15,16], n-butyl methacrylate [17], calcium carbonate [18], and some others [19,20]. Wang [9] et al prepared silica encapsulation of OD via the sol-gel process to enhance thermal conductivity and phase change performance.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Property Modification on Novel Energy Storage Material: n‐Octadecane PCMs/Expanded Perlite Composite Gypsum Board

Zhu

Guo

Hou

et al. 2019

Advances in Civil Engineering

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Phase change materials (PCMs) have been widely used to improve the thermal energy storage capacity of building materials. In this study, the n-octadecane (OD)/expanded perlite (EP) composite PCM, which was prepared by incorporation of liquid noctadecane into EP using the vacuum impregnation method, was used to fabricate the gypsum board. e microscopic, thermal, and mechanical properties were studied. e SEM results showed that OD could be absorbed into the pores of EP uniformly. e FI-IR results showed that OD and EP have good chemical stability. It was found that the gypsum board has best heat transfer delay when the volume fraction of OD/EP was 20% (v/v). e mechanical property of the gypsum board with OD/EP decreased. To deal with the problem, the effect of nano-Al 2 O 3 on the gypsum board was also studied. e results showed that the mechanical properties of the gypsum board were effectively increased when the dosage of nano-Al 2 O 3 was 0.5 wt.%, and the gypsum board had the best thermal insulation effect when the nano-Al 2 O 3 content was 0.3 wt.%. Considering the cost and the comprehensive property, it was suggested that the optimal addition content of nano-Al 2 O 3 was 0.3 wt.%.

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Microencapsulation of phase change materials with binary cores and calcium carbonate shell for thermal energy storage

Cited by 206 publications

References 41 publications

The micro‐/nano‐PCMs for thermal energy storage systems: A state of art review

The micro‐/nano‐PCMs for thermal energy storage systems: A state of art review

Phase change microcapsules with lead tungstate shell for gamma radiation shielding and thermal energy storage

Preparation and Property Modification on Novel Energy Storage Material: n‐Octadecane PCMs/Expanded Perlite Composite Gypsum Board

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