Phase change material, and preparation method and use thereof
A technology of phase change material and application, applied in the field of its preparation and phase change material, to achieve the effects of good thermal conductivity, good thermal stability and improved stability
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Embodiment 1
[0035] Get 50g of nano-barium sulfate, 50g of sodium hydrogen phosphate dodecahydrate (non-nano-level), porous metal-organic material MOF-5 (specific surface area 2500-3000m 2 / g) 80g, after mixing the above materials, vacuumize to 0MPa, and then ultrasonically treat for 50min to obtain the target phase change material.
[0036] It has been determined that the equivalent thermal conductivity of the phase change material prepared in this embodiment is 100 / (m·K), and the latent heat value is 220J·g-1 , and after 1000 cycles of cooling and heating (0-70°C), the latent heat of phase change only decreased by 6%.
[0037] The phase change material prepared in this embodiment is used in a photoelectric conversion device with reference to the method disclosed in the patent application CN102709397A. The test results show that the photoelectric conversion efficiency of the solar photovoltaic module is increased by 20%.
Embodiment 2
[0039] Take 50g of barium sulfate (non-nano-level), 50g of sodium hydrogen phosphate dodecahydrate (non-nano-level), 80g of porous metal-organic material MOF-5, mix the above materials, vacuumize to 0MPa, and then ultrasonically treat for 50min to obtain target phase change material.
[0040] Measure with the method of embodiment 1: the equivalent thermal conductivity of the phase change material that this embodiment makes is 80 / (m K), and latent heat value is 201J g -1 , after 1000 cycles of cold and heat (0-70°C), the latent heat of phase change decreased by 8%.
Embodiment 3
[0042] Take 50g of sodium hydroxide monohydrate (non-nano-level), 50g of sodium hydrogen phosphate dodecahydrate (non-nano-level), and 80g of porous metal-organic material MOF-5, mix the above materials, vacuumize to 0MPa, and then ultrasonically treat for 50min , the target phase change material is obtained.
[0043] Measure with the method of embodiment 1: the equivalent thermal conductivity of the phase change material that this embodiment makes is 82 / (m K), and latent heat value is 202J g -1 , after 1000 cycles of cold and heat (0-70°C), the latent heat of phase change decreased by 8.5%.
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