Preparation and thermal performances of microencapsulated phase change materials with a nano-Al2O3-doped shell

Wei, Sheng; Duan, Zhi-jun; Huang, Chao‐Wei; Ji, Rong; Zhang, Huanzhi; Xu, Fen; Sun, Lin; Sun, Yun

doi:10.1007/s10973-019-08097-9

Cited by 20 publications

(6 citation statements)

References 54 publications

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“…As the content of PW increased to 60 wt %, the TC of MEPCMs reaches the maximum value (0.5237 W m –1 K –1 ), increasing by 63.76% compared to pure PW (0.3198 W m –1 K –1 ). Subsequently, the TC of MEPCMs decreases with the increasing PW content, which may be attributed to the fact that 5 wt % BNNSs are not enough to stabilize the corresponding proportion of PW; that is, the distribution balance of nano-BNNSs is broken, leading to the low improvement of TC of MEPCMs …”

Section: Resultsmentioning

confidence: 99%

“…Subsequently, the TC of MEPCMs decreases with the increasing PW content, which may be attributed to the fact that 5 wt % BNNSs are not enough to stabilize the corresponding proportion of PW; that is, the distribution balance of nano-BNNSs is broken, leading to the low improvement of TC of MEPCMs. 38 On the basis of the above research results, the TC of MEPCMs is studied by changing the content of BNNSs with a fixed PW content of 60 wt %, as shown in Figure 8b. It is notable that the TC of all MEPCMs with nano-BNNSs is higher than that of pure PW, demonstrating that BNNSs facilitate the TC of phase change microcapsules.…”

Section: Morphology and Stability Of Pickering Emulsionmentioning

confidence: 99%

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Phase Change Microcapsules with a Polystyrene/Boron Nitride Nanosheet Hybrid Shell for Enhanced Thermal Management of Electronics

et al. 2022

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Organic shell material and phase change material (PCM) have low thermal conductivity, which reduces the heat absorption and release rate of microencapsulated phase change materials (MEPCMs). Boron nitride nanosheets (BNNSs) with high thermal conductivity can not only stabilize the oil phase as the Pickering emulsifier but also improve the thermal conductivity of MEPCMs as one of the shell components, thus facilitating the heat conduction in the microcapsule system. Herein, MEPCM with paraffin wax (PW) as the core material and polystyrene (PS) modified by BNNSs as the shell material (PW@PS/BNNS MEPCMs) are synthesized via Pickering emulsion polymerization. The structure of PW@PS/BNNS MEPCMs can be regulated by tuning the PW and BNNS contents, to achieve high latent heat and thermal conductivity. In comparison to pure PW, the thermal conductivity of MEPCMs−5 wt % BNNSs increases by 63.76% at 25 °C. The PW@PS/BNNS powder possesses a latent heat capacity of 166.3 J/ g, corresponding to a high encapsulation ratio of 80.77%. These properties endow the prepared MEPCMs with excellent thermal regulation properties. We also propose the formation mechanism of PW@PS/BNNS MEPCMs via Pickering emulsion polymerization for the first time, which will guide the MEPCM fabrication toward a reliable direction.

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Section: Resultsmentioning

confidence: 99%

Section: Morphology and Stability Of Pickering Emulsionmentioning

confidence: 99%

Phase Change Microcapsules with a Polystyrene/Boron Nitride Nanosheet Hybrid Shell for Enhanced Thermal Management of Electronics

et al. 2022

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“…Al 2 O 3 nanoparticle is widely employed to enhance the heat transfer performance of MPCMs due to its superior properties, like low cost, strong unit stiffness, good mechanical properties at high temperature, and excellent oxidation resistance. In the research work of Wei et al, 86 the thermal conductivity of MPCMs added with 8% Al 2 O 3 nanoparticles obtained 0.5977 W/m K, which was an increase of 287.4%. Jiang et al 87 employed Al 2 O 3 nanoparticles to enhance the thermal conductivity of poly(methyl methacrylate‐co‐methyl acrylate) shell.…”

Section: Modification Of Mpcms By Nanoparticlementioning

confidence: 92%

Research progress on preparation, characterization, and application of nanoparticle‐based microencapsulated phase change materials

Lin

Zhang

et al. 2021

Int J Energy Res

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Summary As an energy storage material, microencapsulated phase change materials (MPCMs) have become a research hotspot in recent years due to their unique thermophysical properties. However, this material usually has limitations in terms of its performance, such as low encapsulation efficiency, leakage during phase change, poor cycle stability, and high degree of supercooling. To solve these problems, nanoparticle as‐modified material to improve the performance of MPCMs has attracted the attention of both domestic and overseas scholars. This paper aims to review the research progress of MPCMs modified by nanoparticle from three aspects: preparation, performance, and application. In this paper, the preparation method and principle of nanoparticles used for the modification of MPCMs are first introduced. Then, based on different properties (mechanical properties, thermal conductivity, thermal stability, and supercooling), the research works of nanoparticle‐modified MPCMs in recent years are reviewed. Finally, the practical applications of nanocomposite MPCM in the field of slurry, building, asphalt pavement, and battery thermal management are reported.

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“…It is easy for pure PCMs to reach thermal saturation due to the low thermal conductivity. So BTMS based on pure PCMs cannot effectively control the pack temperature under long-term and high-power operations of LiBs (Wei et al, 2019). Therefore, it is vital to enhance the thermo-physical properties of pure PCM.…”

Section: Solid-liquid Phase Change Systemmentioning

confidence: 99%

Advanced Engineering Materials for Enhancing Thermal Management and Thermal Safety of Lithium-Ion Batteries: A Review

Yang

Lin²,

Zhang³

et al. 2022

Front. Energy Res.

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Lithium-ion batteries (LiBs) are the key power source for electric vehicles (EVs). Battery thermal management system (BTMS) is essential to ensure safety and extend service life of LIBs. This paper reviews the various refrigeration materials used in the BTMS in EVs, including liquid coolant, phase change material (PCM). The thermal properties of these refrigerant materials are summarized and the innovative ways to improve the cooling efficiency of the BTMS are analyzed. The various ways to enhance the battery’s thermal performance by modifying the materials of the electrode, separator, and electrolyte are also reviewed. Finally, the research prospect in area of BTMS is summarized. This review will inspire new BTMS design and further improvement in battery safety and performance with the aid of advanced intelligent technologies.

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Preparation and thermal performances of microencapsulated phase change materials with a nano-Al2O3-doped shell

Cited by 20 publications

References 54 publications

Phase Change Microcapsules with a Polystyrene/Boron Nitride Nanosheet Hybrid Shell for Enhanced Thermal Management of Electronics

Phase Change Microcapsules with a Polystyrene/Boron Nitride Nanosheet Hybrid Shell for Enhanced Thermal Management of Electronics

Research progress on preparation, characterization, and application of nanoparticle‐based microencapsulated phase change materials

Advanced Engineering Materials for Enhancing Thermal Management and Thermal Safety of Lithium-Ion Batteries: A Review

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