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High-temperature phase-change heat storage microcapsule and preparation method thereof

A high-temperature phase change and microcapsule technology, which is applied in chemical instruments and methods, heat exchange materials, etc., can solve the problems of complex preparation process and incapable of direct application of capsules, achieve simple preparation process, improve the utilization rate and utilization of heat Efficiency and low cost of raw materials

Inactive Publication Date: 2017-10-13
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of this kind of microcapsules is complicated, and the shell structure prepared in the first step is loose, so the capsules prepared in the first step cannot be directly applied.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A high temperature phase change thermal storage microcapsule and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0031] Step 1. According to the mass ratio of aluminum-silicon alloy powder: polycarboxylate water reducing agent being 100: (0.01-0.5), the aluminum-silicon alloy powder and the surface modifier are evenly stirred to prepare a mixture.

[0032]Step 2: Add aluminum dihydrogen phosphate solution with a concentration of 30-80wt% to the mixture at a constant speed under the condition of 20-100°C water bath and stirring, and continue stirring for 1-30 minutes after adding the aluminum dihydrogen phosphate solution to obtain Mix slurry.

[0033] The mass ratio of the aluminum-silicon alloy powder: the aluminum dihydrogen phosphate solution is 100: (3~20); adding at a constant speed refers to the aluminum-silicon alloy powder content per kilogram of the mixture added to the aluminum dihydrogen phosphat...

Embodiment 2

[0040] A high temperature phase change thermal storage microcapsule and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0041] Step 1. According to the mass ratio of aluminum-silicon alloy powder:polycarboxylate water reducer of 100:(0.4-0.9), the aluminum-silicon alloy powder and the surface modifier are evenly stirred to prepare a mixture.

[0042] Step 2: Add aluminum dihydrogen phosphate solution with a concentration of 30-80wt% to the mixture at a constant speed under the condition of 20-100°C water bath and stirring, and continue stirring for 1-30 minutes after adding the aluminum dihydrogen phosphate solution to obtain Mix slurry.

[0043] The mass ratio of the aluminum-silicon alloy powder: the aluminum dihydrogen phosphate solution is 100: (19-36); adding at a constant speed means that the aluminum-silicon alloy powder content per kilogram of the mixture is added to the aluminum dihydrogen phosphate The ...

Embodiment 3

[0050] A high temperature phase change thermal storage microcapsule and a preparation method thereof. The specific steps of the preparation method described in this embodiment are:

[0051] Step 1. According to the mass ratio of aluminum-silicon alloy powder: polycarboxylate water reducing agent being 100: (0.8-1.3), the aluminum-silicon alloy powder and the surface modifier are evenly stirred to prepare a mixture.

[0052] Step 2: Add aluminum dihydrogen phosphate solution with a concentration of 30-80wt% to the mixture at a constant speed under the condition of 20-100°C water bath and stirring, and continue stirring for 1-30 minutes after adding the aluminum dihydrogen phosphate solution to obtain Mix slurry.

[0053] The mass ratio of the aluminum-silicon alloy powder: the aluminum dihydrogen phosphate solution is 100: (35-52); adding at a constant speed means that the aluminum-silicon alloy powder content per kilogram of the mixture is added to the aluminum dihydrogen pho...

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Abstract

The invention relates to a high-temperature phase-change heat storage microcapsule and a preparation method thereof. The preparation method is characterized by comprising the steps of evenly stirring aluminum and silicon alloy powder and a surface active agent; under water bath and stirring condition, adding an aluminum dihydrogen phosphate solution at a constant speed; stirring to obtain mixed slurry; under water bath and stirring condition, adding anhydrous organic alcohol into the mixed slurry; continuing stirring, standing and filtering to obtain precipitate. Washing the precipitate until the pH value is neutral, drying to constant weight, and obtaining a high-temperature phase-change heat storage microcapsule green body. Thermally insulating the high-temperature phase-change heat storage microcapsule green body for 2 to 8h under condition of oxidizing atmosphere and 600 to 1300 DEG C to obtain the high-temperature phase-change heat storage microcapsule of a compound shell layer or thermally insulating the high-temperature phase-change heat storage microcapsule green body for 2 to 8h under the condition of oxidizing atmosphere and 1300 to 1500 DEG C to obtain the high-temperature phase-change heat storage microcapsule of an aluminum oxide shell layer. The preparation method disclosed by the invention has low raw material cost, simple preparation technology and easiness in achieving industrial production. The prepared product has high heat utilization rate and utilization efficiency and high utilization temperature.

Description

technical field [0001] The invention belongs to the technical field of high temperature phase change thermal storage composite materials. Specifically, it relates to providing a high-temperature phase-change thermal storage microcapsule and a preparation method thereof. Background technique [0002] Heat storage technology is a kind of energy storage technology that uses heat storage materials to store temporarily unnecessary heat, and then releases heat when heat is needed. Heat storage technology solves the time difference between heat supply and demand, and improves the utilization of heat. Therefore, it can be used for peak-shaving and valley-filling of power loads, solar energy storage, and recovery of industrial waste heat, etc., to achieve the goal of developing new energy and saving old energy. Purpose. [0003] The core issue of thermal storage technology is the preparation and application of thermal storage materials, among which phase change thermal storage mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 张美杰韩藏娟顾华志黄奥罗志安
Owner WUHAN UNIV OF SCI & TECH
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