Phase change energy stored microcapsule, preparation method and apparatus

Abstract

This invention relates to method and apparatus for preparing phase-change energy-storage microcapsules. The phase-change energy-storage microcapsules comprise encapsulating material and organic phase-change material. The encapsulating material is composed of a network polymer, which is obtained by reaction between sodium alginate and alkaline earth metal salt. The method comprises: mixing sodium alginate solution and liquid phase-change energy-storage paraffin, and encapsulating by membrane pore method to obtain microcapsules. The obtained phase-change energy-storage microcapsules have such advantages as high chemical and thermal stability, high mechanical strength, and wide applications.

Description

technical field [0001] The invention relates to a phase change energy storage microcapsule and a preparation method and device thereof. Background technique [0002] Energy is the basis for the existence and development of human society. With the development of social economy and the continuous improvement of people's living standards, human demand for energy is increasing, which will inevitably lead to a shortage of primary energy, especially fossil fuels. Therefore, more and more attention has been paid to recycling, storing and utilizing heat energy. [0003] There are many thermal energy sources in production and life, such as solar energy, geothermal energy, industrial waste heat, waste heat, etc. These energy sources are characterized by a large amount, but have the disadvantages of intermittency and instability. Phase change energy storage technology utilizes the phase change latent heat of materials, which can alleviate the contradiction between energy supply and d...

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Problems solved by technology

[0006] At present, the preparation methods of microcapsules mainly include: emulsion core-shell polymerization (publication number CN1695788), polymer solution precipitation polymerization (publication number CN1695789), in-situ encapsulation (publication number CN1908257), etc. These methods exist in the process of preparing microcapsules. There are many problems, such as small controllability of microcapsule particle size, complex preparation process and reaction conditions, low degree of continuous production, etc., which limit the application of microencapsulated phase change energy storage materials.

[0007] There are many kinds of materials used as phase-change energy storage microcapsule wall materials. For example, the patent with publication number CN1161364 uses melamine resin as the microcapsule wall material, and the patent with publication number CN1844269 uses silica deposits as the microcapsule wall material. , the patent with the publication number CN1715359 uses animal protein acetal as the microcapsule wall material, the patent with the publication number CN1695787 uses vinyl and divinyl radical monomers as the source of the shell polymer, etc., using such materials as Wall materials need to strictly control the reaction conditions to induce polymerization and encapsulation of polymer monomers, so the operation process is complicated and not suitable for large-scale production, and the microcapsules prepared by the existing microencapsulation method are mostly single-core microcapsules. There are problems such as poor chemical and thermal stability of microcapsules, low mechanical strength, and narrow application range

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