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Phase change heat storage material with core-shell structure and preparation method of phase change heat storage material

A technology of phase change heat storage and core-shell structure, which is applied in the direction of heat exchange materials, chemical instruments and methods, can solve the problems of microcapsules bonding and difficulty in meeting the requirements of dispersion, and achieve easy control and increase heat Utilization rate and utilization efficiency, good effect of decentralization

Inactive Publication Date: 2018-07-06
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

[0028] A phase-change thermal storage material with a core-shell structure and a preparation method thereof. The steps of the preparation method described in this embodiment are:

[0029] Step 1. According to the mass ratio of aluminum-silicon alloy powder: pretreatment liquid is 1: (10-60), the aluminum-silicon alloy powder is placed in the pre-treatment liquid, stirred for 10-20 minutes, filtered, and dried to obtain Surface-modified aluminum-silicon alloy powder.

[0030] Step 2, according to the mass ratio of the surface-modified aluminum-silicon alloy powder: catalyst is 1: (0.001 ~ 0.003), the surface-modified aluminum-silicon alloy powder and the catalyst are mixed evenly to obtain the adsorbed Al-Si alloy powder for catalyst.

[0031] Step 3: Put the Al-Si alloy powder adsorbed with the catalyst in a muffle furnace, roast in an oxygen-enriched atmosphere at 600-700°C for 6-8 hours, and cool to room temperature to obtain a phase-transformation powder with a core-shell...

Embodiment 2

[0034] A phase-change thermal storage material with a core-shell structure and a preparation method thereof. Except described catalyzer, all the other are with embodiment 1:

[0035] The catalyst is a mixture of ammonium chloride and lithium nitrate.

Embodiment 3

[0037] A phase-change thermal storage material with a core-shell structure and a preparation method thereof. The steps of the preparation method described in this embodiment are:

[0038] Step 1. According to the mass ratio of aluminum-silicon alloy powder: pretreatment liquid is 1: (30-80), the aluminum-silicon alloy powder is placed in the pre-treatment liquid, stirred for 15-25 minutes, filtered, and dried to obtain Surface-modified aluminum-silicon alloy powder.

[0039] Step 2, according to the mass ratio of the surface-modified aluminum-silicon alloy powder:catalyst is 1: (0.002~0.004), the described surface-modified aluminum-silicon alloy powder and the catalyst are mixed uniformly to obtain the adsorbed Al-Si alloy powder for catalyst.

[0040] Step 3: Put the Al-Si alloy powder with the catalyst adsorbed in a muffle furnace, roast in an oxygen-enriched atmosphere at 680-780°C for 4-6 hours, and cool to room temperature to obtain a phase transition powder with a core...

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Abstract

The invention relates to a phase change heat storage material with a core-shell structure and a preparation method of the phase change heat storage material. The technical scheme comprises the following steps: putting aluminum-silicon alloy powder in pretreatment liquid in a mass ratio of the aluminum-silicon alloy powder to the pretreatment liquid of 1 to (10-100), performing stirring for 10-30min, and performing filtration and drying to obtain surface-modified aluminum-silicon alloy powder; uniformly mixing the surface-modified aluminum-silicon alloy powder with a catalyst in a mass ratio ofthe surface-modified aluminum-silicon alloy powder to the catalyst of 1 to (0.001-0.005) to obtain catalyst-adsorbed aluminum-silicon alloy powder; and putting the catalyst-adsorbed aluminum-siliconalloy powder in a muffle furnace, performing roasting for 2-8h at 600-850 DEG C in oxygen-rich atmosphere, and cooling to room temperature to obtain the phase change heat storage material with the core-shell structure. The preparation method has the characteristics of low cost, simple process and easy industrial production, and the prepared phase change heat storage material with the core-shell structure has good dispersibility, multiple times of thermal circulation and high heat utilization ratio.

Description

technical field [0001] The invention belongs to the technical field of phase change thermal storage composite materials. It specifically relates to providing a phase-change thermal storage material with a core-shell structure 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 phase change heat storage materials ...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/063
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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