Preparation and thermal performance of phase change material with high latent heat and thermal conductivity based on novel binary inorganic eutectic system

Qiu, Wenjuan; Wang, Di; Wang, Shuangfeng

doi:10.1016/j.solmat.2021.111186

Cited by 25 publications

(3 citation statements)

References 31 publications

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“…en, the mixed expandable resin powder is coated on the surface of EPS beads by spray with a nozzle. e coated EPS beads are dried with hot air; then, talc powder is added and then foamed in the mold [10]. Ovsyannikov used Freon as flame retardant, added Freon into thermosetting phenolic resin and stirred evenly to make flame retardant coating solution.…”

Section: Literature Reviewmentioning

confidence: 99%

Preparation and Sound Insulation Performance of Polystyrene Building Flame Retardant and Thermal Insulation Building Materials

Guo

2022

International Journal of Analytical Chemistry

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In this study, magnesium hydroxide (MH) was modified by sodium dodecylbenzene sulfonate (SDBS) to prepare modified magnesium hydroxide (MMH) flame retardant, which was mixed with polystyrene (PS) to obtain flame retardant PS composite plate. The micromorphology, mechanical properties, thermal stability, and flame retardancy of flame retardant PS composite plate were analyzed. The experimental results show that MMH is well dispersed in PS matrix, PS-MMH-3 has the best tensile strength and elongation at break, the limit oxygen index (LOI) is 44.3% higher than that of pure PS, and the combustion rate is slow, indicating that PS-MMH-3 has good flame retardant properties.

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Section: Literature Reviewmentioning

confidence: 99%

Preparation and Sound Insulation Performance of Polystyrene Building Flame Retardant and Thermal Insulation Building Materials

Guo

2022

International Journal of Analytical Chemistry

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“…When the amount of PCM-1 is 70%, latent heat of the material was the smallest, which is 195.4 J/g. It is presumed that the material was not evenly mixed, and a part of the material absorbed heat before the main peak, which led to a decrease in the overall latent heat …”

Section: Results Analysismentioning

confidence: 99%

Development of Composite Phase Change Material for Preventing Spontaneous Combustion of Coal and Its Thermo-Physical Properties

Tang

Chen

et al. 2022

Energy Fuels

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In order to further study the application of phase change materials in inhibitors to prevent spontaneous combustion of coal, AlNH4(SO4)2·12H2O and MgSO4·7H2O were used as raw materials to obtain binary eutectic by melt impregnation. The phase transition temperature of the new material is around 70 °C, which is in the critical temperature range of the coal oxidation process. The material melts and absorbs the heat of coal during the phase change, so that the temperature of the coal is lower than the critical temperature. At the same time, it penetrates into the pores of the coal to isolate oxygen and achieves the effect of blocking the self-heating process of coal oxidation. The experimental results point out that as the proportion of AlNH4(SO4)2·12H2O in the binary eutectic increases, the better the material fusion becomes. The phase transition temperature decreases sharply at first and then slowly increases and stabilizes. The latent heat of change fluctuates back and forth between 260 and 290 J/g and then obviously decreases. Weight loss is basically between 20 and 40%. The optimization experiment pointed out that the best result is when the content of AlNH4(SO4)2·12H2O is 57.6%. Under this amount, the latent heat of phase transition is 298.67 J/g, the phase transition temperature is 65.88 °C, the weight loss rate is 27.2%, and the undercooling degree is 7.1 °C.

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“…used flake graphite as a nucleating agent to reduce the subcooling of PCMs and a superabsorbent polymer as a thickener to improve the anti-segregation capability of liquid CaCl 2 ·6H 2 O and phase separation. Qiu et al . used expanded graphite (EG) to prepare two kinds of composite PCMs, Ba(OH) 2 ·8H 2 O–KCl/EG and Ba(OH) 2 ·8H 2 O–KNO 3 /EG.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Sodium Sulfate Decahydrate–Sodium Acetate Trihydrate Shape-Stabilized Phase Change Materials

Xing

Dong

et al. 2022

Energy Fuels

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Inorganic hydrated salt phase change materials (PCMs) have the advantages of large latent heat, wide source range, and no poison, and they are widely used in the field of building energy conservation. In this study, sodium sulfate decahydrate (SSD) and sodium acetate trihydrate (SAT) were prepared into binary eutectic hydrated salt (EHS) by the melt blending method. The EHS was respectively impregnated into porous adsorption materials, such as attapulgite and expanded perlite, to prepare two shape-stabilized phase change materials (SSPCMs) by the vacuum impregnation method. The chemical structure, crystal phase, and combination mode of eutectic salts and SSPCMs were determined by Fourier transform infrared spectroscopy and X-ray diffraction techniques. The results show that there is no chemical reaction between porous adsorption materials and eutectic salt but a physical combination. Scanning electron microscopy results show that the eutectic is well-adsorbed in the porous structure of attapulgite or expanded perlite. Differential scanning calorimetry results show that, when the molar ratio of SSD/SAT is 0.71:0.29, the phase transition temperature of EHS is 28.5 °C and the phase transition enthalpy is 128.1 J/g. Borax (1.5 wt %) can effectively reduce the subcooling of binary EHS from 10.8 to 0.7 °C. Adding 25 wt % attapulgite can completely adsorb the PCMs; the phase change enthalpy is 92.1 J/g; and after 200 cycles, the enthalpy decreases by 24.6%. Encapsulated by polyurethane, the enthalpy value of SSPCMs only decreases by 10.4% after 200 thermal cycles, showing that the thermal stability is significantly improved.

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Preparation and thermal performance of phase change material with high latent heat and thermal conductivity based on novel binary inorganic eutectic system

Cited by 25 publications

References 31 publications

Preparation and Sound Insulation Performance of Polystyrene Building Flame Retardant and Thermal Insulation Building Materials

Preparation and Sound Insulation Performance of Polystyrene Building Flame Retardant and Thermal Insulation Building Materials

Development of Composite Phase Change Material for Preventing Spontaneous Combustion of Coal and Its Thermo-Physical Properties

Preparation and Characterization of Sodium Sulfate Decahydrate–Sodium Acetate Trihydrate Shape-Stabilized Phase Change Materials

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