Low-temperature phase-change heat storage material and preparation method thereof
A heat storage material and low-temperature phase change technology, which is applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of complex preparation process, many additives, and high degree of supercooling, and achieve simple preparation process, few types, and ease of use. The effect of encapsulation
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Embodiment 1
[0013] Weigh sodium acetate trihydrate, disodium hydrogen phosphate dodecahydrate, and gelatin in proportions of 90%, 5.8%, and 4.2% by weight, grind the three components to 30 mesh, mix well, and mix the mixture at 69 Heat in a water bath at ℃ to melt all the components completely and form a colloidal liquid. Stir the colloidal liquid evenly and pour it into the container. Seal the container after cooling the liquid to room temperature.
[0014] After testing, the latent heat of the low-temperature phase change heat storage material prepared in this example is 238 kJ / kg, the crystallization temperature is 52°C, and the degree of supercooling is 1.5°C.
Embodiment 2
[0016] Weigh sodium acetate trihydrate, disodium hydrogen phosphate dodecahydrate and gelatin in proportions of 91%, 5% and 4% by weight respectively, grind the three components to 40 mesh, mix well, and mix the mixture at 70 Heat in a water bath at ℃ to melt all the components completely and form a colloidal liquid. Stir the colloidal liquid evenly and inject it into the container. Seal the container after cooling the liquid to room temperature.
[0017] After testing, the latent heat of the low-temperature phase change heat storage material prepared in this embodiment is 240 kJ / kg, the crystallization temperature is 53°C, and the degree of supercooling is 0.8°C.
Embodiment 3
[0019] Weigh sodium acetate trihydrate, disodium hydrogen phosphate dodecahydrate and gelatin in proportions of 92%, 4.5% and 3.5% by weight, grind the three components to 50 mesh, mix well, and mix the mixture at 72 Heat in a water bath at ℃ to melt all the components completely and form a colloidal liquid. Stir the colloidal liquid evenly and inject it into the container. Seal the container after cooling the liquid to room temperature.
[0020] After testing, the latent heat of the low-temperature phase change heat storage material prepared in this example is 243 kJ / kg, the crystallization temperature is 52°C, and the degree of supercooling is 1.0°C.
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