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Compact aluminum oxide shell high-temperature phase-changing heat-storage microcapsule and preparation method thereof

A high-temperature phase change and alumina technology, which is applied in the direction of microcapsule preparation, microsphere preparation, chemical instruments and methods, etc., can solve the problems of difficulty in meeting the requirements of dispersion and adhesion of microcapsules, and achieve low cost and easy control , the effect of high thermal cycle times

Inactive Publication Date: 2018-08-10
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method of this kind of microcapsule is simple, but there is adhesion between the prepared microcapsules, it is difficult to meet the industrial application that requires high dispersion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A high-temperature phase-change thermal storage microcapsule with a dense alumina shell and a preparation method thereof. The steps of the preparation method described in this embodiment are:

[0033] Step 1, according to the mass ratio of iodine: dehydrated ethanol: catalyst is 1: (3000~6000): (0.1~0.5), adding the iodine and the catalyst into the dehydrated ethanol, stirring for 10~17min , to obtain a solution.

[0034] Step 2, according to the mass ratio of iodine: aluminum-silicon alloy powder is 1: (100-300), add the aluminum-silicon alloy powder to the solution, and stir for 6-8 hours in a water bath at 60-70°C , to obtain a suspension.

[0035] Step 3, according to the mass ratio of iodine: acetic acid being 1: (400-600), adding the acetic acid to the suspension under 60-70°C water bath and stirring conditions; standing for 1-5h, filtering, washing the filtered material alternately with absolute ethanol and deionized water until the pH value is neutral, and dr...

Embodiment 2

[0038] A high-temperature phase-change thermal storage microcapsule with a dense alumina shell and a preparation method thereof. The steps of the preparation method described in this embodiment are:

[0039] Step 1, by iodine: dehydrated alcohol: the mass ratio of catalyst is 1: (4000~7000): (0.3~0.7), described iodine and described catalyst are added in described dehydrated alcohol, stir 16.5~23.5 min, the solution is obtained.

[0040] Step 2, according to the mass ratio of iodine: aluminum-silicon alloy powder is 1: (200-400), add the aluminum-silicon alloy powder to the solution, and stir for 8-10 hours in a water bath at 70-80°C , to obtain a suspension.

[0041]Step 3, according to the mass ratio of iodine: acetic acid is 1: (500 ~ 700), under the condition of 70 ~ 80 ℃ water bath and stirring, add the acetic acid to the suspension; let stand for 4.5 ~ 8.5h , filtered, and the filtered material was alternately washed with absolute ethanol and deionized water until the...

Embodiment 3

[0044] A high-temperature phase-change thermal storage microcapsule with a dense alumina shell and a preparation method thereof. The steps of the preparation method described in this embodiment are:

[0045] Step 1, according to the mass ratio of iodine: dehydrated ethanol: catalyst is 1: (5000~8000): (0.6~1), adding the iodine and the catalyst into the dehydrated ethanol, stirring for 23~30min , to obtain a solution.

[0046] Step 2. According to the mass ratio of iodine: aluminum-silicon alloy powder as 1: (300-500), add the aluminum-silicon alloy powder to the solution, and stir for 10-12 hours in a water bath at 80-90°C , to obtain a suspension.

[0047] Step 3, according to the mass ratio of iodine: acetic acid is 1: (600 ~ 800), under the condition of 80 ~ 90 ℃ water bath and stirring, add the acetic acid to the suspension; let it stand for 8 ~ 12h, filtering, washing the filtered material alternately with absolute ethanol and deionized water until the pH value is neu...

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Abstract

The invention relates to a compact aluminum oxide shell high-temperature phase-changing heat-storage microcapsule and a preparation method thereof. The preparation method is characterized by comprising the following steps: mixing iodine, absolute ethyl alcohol and a catalyst according to a weight ratio of 1: (3000 to 8000): (0.1 to 1), thus obtaining a solution; adding aluminum-silicon alloy powder into the solution according to a weight ratio of iodine to aluminum-silicon alloy powder being 1: (100 to 500) under a water bath and stirring condition, then adding acetic acid according to a weight ratio of iodine to acetic acid of 1: (400 to 800); standing filtering, washing, and drying; placing in a muffle furnace, thermally preserving for 2 to 8 hours at 900 to 1300 DEG C in an oxidation atmosphere, cooling to the room temperature, and obtaining the compact aluminum oxide shell high-temperature phase-changing heat-storage microcapsule. The compact aluminum oxide shell high-temperature phase-changing heat-storage microcapsule has the characteristics of low cost, simple process and ease in industrialized production; and the compact aluminum oxide shell high-temperature phase-changingheat-storage microcapsule prepared by using the method is good in dispersity, more in heat cycles, high in shell strength and high in heat utilization rate.

Description

technical field [0001] The invention belongs to the technical field of high temperature phase change thermal storage microcapsules. Specifically, it relates to providing a high-temperature phase-change thermal storage microcapsule with a dense alumina shell 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 contradiction 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, so as to achieve the goal of developing new energy and saving old energy. Purpose. [0003] The core issue of heat storage technology is the preparation and application of heat storage materials, among which phas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06B01J13/02
CPCC09K5/063B01J13/02
Inventor 张美杰韩藏娟顾华志白晨黄奥付绿平
Owner WUHAN UNIV OF SCI & TECH
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