Phase-change microsphere as well as preparation method and application thereof
A technology of phase-change microspheres and microspheres, which is applied in the field of nanoporous materials and phase-change energy storage, can solve the problems of high specific surface area, inapplicability, high porosity, etc., and achieve simple preparation process, large enthalpy value, excellent The effect of conductivity
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[0046] Another aspect of the embodiment of the present invention provides a preparation method of the aforementioned phase change microspheres. In a typical embodiment, the preparation method includes: using aerogel microspheres as a template, filling by melt immersion, and filling in the aerogel microspheres. The phase change material is introduced into the three-dimensional network of the balls, and the external residual phase change material is removed, and then the functional phase change microspheres are obtained by cooling.
[0047] As one of the preferred solutions, the preparation method includes: providing aerogel microspheres as a template, and immersing the aerogel microspheres in a molten phase change material at a temperature of 30 to 150°C in a vacuum or normal pressure environment , Stand for 0.5-12h, melt and fill, cool and solidify to obtain phase change microspheres.
[0048] Further, the preparation method further includes: placing the phase change microspheres o...
Example Embodiment
[0069] Example 1
[0070] (1) Graphene aerogel microspheres with a diameter of 300 μm are selected as the template for preparing phase change microspheres;
[0071] (2) Put the graphene aerogel microspheres and solid paraffin together in a vacuum at 80°C for 3 hours.
[0072] (3) Take out the microsphere impregnated with the phase change material, place it on the filter paper, and let it stand at 80°C for 1 hour to remove the extra phase change material on the outer surface of the microsphere.
[0073] (4) The above-mentioned microspheres are placed in a room temperature environment and cooled to obtain the phase-change microspheres. figure 1 Shows the SEM picture of the phase change microspheres obtained in this example, figure 2 Shows the TG curve of the phase change microspheres obtained in this example, image 3 The DSC curve of the phase change microspheres obtained in this example is shown.
[0074] (5) Heat flow stabilizer: apply voltage across the phase change microspheres, Fi...
Example Embodiment
[0075] Example 2
[0076] (1) Select PI-based carbon aerogel microspheres with a diameter of 400 μm as a template for preparing phase change microspheres;
[0077] (2) Put PI-based carbon aerogel microspheres and paraffin wax together in a vacuum, 70°C environment for 5 hours.
[0078] (3) Take out the microsphere impregnated with the phase change material, place it on the filter paper, and let it stand at 70°C for 1 hour to remove the extra phase change material on the outer surface of the microsphere.
[0079] (4) The above-mentioned microspheres are placed in a room temperature environment and cooled to obtain the phase-change microspheres.
[0080] (5) Heat flow stabilizer: AC current with a pulse width of 1ms is applied to both ends of the phase change microsphere, Image 6 Shows the current signal of the phase change microspheres in this embodiment, Figure 7 The voltage changes of the phase change microspheres in this embodiment are shown, and other parameters are shown in Table ...
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