A kind of phase change energy storage microsphere and preparation method thereof

Abstract

The invention relates to a phase-change energy storage microsphere and a preparation method thereof. The microspheres include a phase-change capsule core, a phase-change microsphere shell encapsulation glue, and a microsphere-reinforced base material. The microsphere preparation method includes uniformly spraying the phase-change microsphere shell wrapping glue onto the surface of the phase-change capsule core, then adding the microspheres to enhance the base material and mixing evenly, the first wrapping is completed, and the surface drying time is 10-20 minutes. Obtain the microspheres once; repeat the wrapping twice according to the aforementioned procedure and method, and the wrapping of the phase change energy storage microspheres is completed; the sizing amount of the phase change microsphere shell wrapping glue is 1 / 3 of the formula amount each time, and each time The dosage of the microsphere reinforced substrate is 1 / 3 of the formula amount. The phase change energy storage microsphere shell of the invention adopts nano-silica sol and vegetable glue as the microsphere shell material, so that the phase change energy storage microsphere has high strength, dense shell, flexibility, resistance to mechanical stirring and wear and no rupture, and ensures When the phase change material changes from solid to liquid phase, there will be no leakage and loss, which ensures the long-term effectiveness of the energy storage of the phase change material.

Description

technical field [0001] The invention relates to the technical field of energy-saving heat preservation and energy storage materials, in particular to a phase change energy storage microsphere and a preparation method thereof. Background technique [0002] With the development of science and technology, the requirements for energy-saving and thermal insulation materials in various fields are getting higher and higher. Materials can no longer meet the above requirements, so it is particularly important to develop functional and high-performance energy-saving insulation materials. [0003] Phase-change energy storage materials and phase-change microcapsules currently used in thermal insulation and energy-saving materials have defects of varying degrees in the use method and phase-change material wrapping process. It is mainly reflected in three aspects: First, the phase change material is not wrapped and directly used in the insulation material. During the solid-liquid phase ...

AI Technical Summary

Problems solved by technology

Second, due to the cost of thermal insulation and energy-saving materials

Improper selection of wall materials for phase change microcapsules results in poor density and toughness of the capsule material, which is not resistant to mechanical agitation and wear, resulting in rupture of the capsule shell

The third is that microcapsule technology has not been popularized yet, and the packaging process is difficult and costly. Capsules are mainly used for high value-added medicines, pesticides, daily necessities, textiles, light-sensitive color-changing materials, electronic product cooling, spacecraft energy storage cooling, Far-infrared ray stealth and other aspects

At present, the wall thickness of existing microcapsules in the market is generally 1-20 μm, which is not suitable for building insulation. The capsule wall is thin and cannot withstand the air pressure generated in the capsule during the solid-liquid phase transition of the phase change material, causing the capsule shell to rupture. It is not resistant to mechanical stirring and friction during the production process, and the phase change energy storage efficiency is slowly lost

If the thickness of the capsule wall is 50-60 μm, the cost is very expensive, and the thermal insulation market does not accept it, so it is not suitable for large-scale popularization

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