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Method for preparing composite fixed phase-change energy-accumulation material

An energy storage material and shape-fixed phase change technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of environmental pollution, high cost, high preparation cost, high reaction temperature, etc., and achieve low production cost and compatibility Good performance and good environmental compatibility

Inactive Publication Date: 2016-12-21
GUANGDONG YIHUA TIMBER IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Generally, organic materials and inorganic materials are used as support materials. Organic materials bring environmental pollution and high cost. Now inorganic substances (such as diatomite, perlite, vermiculite, etc.) as support materials have the disadvantages of low thermal conductivity and low reaction Disadvantages such as high temperature and high preparation cost

Method used

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  • Method for preparing composite fixed phase-change energy-accumulation material
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  • Method for preparing composite fixed phase-change energy-accumulation material

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preparation example Construction

[0034] The preparation method of the composite shape-setting phase-change energy storage material of the present invention comprises the following steps:

[0035] (1) Preparation of hydroxyapatite powder used as support material;

[0036] (2) Add the hydroxyapatite powder and the phase change material with good compatibility with the hydroxyapatite powder to the corresponding solvent deionized water or absolute ethanol respectively according to a certain mass ratio, and stir evenly. Then the two solutions are mixed in a reaction kettle, stirred evenly, dried and ground, and finally a composite shape-fixed phase change energy storage material (hereinafter referred to as a shape-set phase change material) is obtained;

[0037] Wherein the mass ratio of the hydroxyapatite powder to the phase change material is 1-5:5-8.

[0038] Above-mentioned phase change material is polyethylene glycol, fatty acid, solid paraffin, cetyl alcohol, Na 2 SO 4 10H 2 O, CaCl 2 ·6H 2 O, Na 2 HP...

Embodiment 1

[0050] Example 1: The following implementation mode takes polyethylene glycol / hydroxyapatite powder composite as an example, and the preparation and characterization of the shape-changing energy storage material are carried out according to the following steps:

[0051] Step 1. At room temperature or close to room temperature, weigh Ca(NO 3 ) 2 4H 2 O 5.877g, (NH 4 ) 2 HPO 4 1.972g, dissolved in 30ml and 30ml of deionized water respectively, stirred by magnetic force for 10-60min, the speed is 100-1000r / min;

[0052] Step 2. Mix the two solutions in step 1, add 300ml of deionized water, stir magnetically, the rotation speed is 100-1000r / min, the stirring time is 10-60min, adjust the pH with ammonia water, adjust the pH to 7-11, Continue magnetic stirring at a speed of 100-1000r / min for 10-60min, age for 5-24h, heat-treat the aged product at 25°C water temperature, filter it, dry it (at a temperature of 35°C), grind, Obtain 2.5g of hydroxyapatite powder;

[0053] Step 3...

Embodiment 2

[0060] Example 2: The following implementation mode takes cetyl alcohol / hydroxyapatite powder composite as an example, and the preparation and characterization of the shape-changing energy storage material are carried out according to the following steps:

[0061] Step 1 and Step 2 are the same as above.

[0062] Step 3. Weigh 0.99g of hydroxyapatite powder obtained in step 2, weigh 2.01g of cetyl alcohol, add 40ml and 40ml of absolute ethanol respectively, and heat at 40°C with a magnetic stirring speed of 10-1000r / min , the stirring time is 10-100min, and then it is mixed with a magnetic stirring speed of 10-1000r / min, stirred for 4-20h, dried, and ground to obtain 3g of a fixed-shape phase-change energy storage material (hereinafter referred to as the sample).

[0063] The mass fraction of cetyl alcohol that can be adsorbed by the shaped phase change energy storage material is 67%. The thermal conductivity is 0.157W / (m ).

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Abstract

The invention discloses a method for preparing a composite fixed phase-change energy-accumulation material. The method comprises the following steps: dissolving calcium nitrate and diammonium hydrogen phosphate respectively in deionized water, then performing mixing and stirring, adjusting the pH value by ammonia water, continuing to stir, and performing aging, suction filtration, drying and grinding so as to prepare hydroxyapatite powder as a support material; adding the hydroxyapatite powder and a phase-change material which has good compatibility with the hydroxyapatite powder into corresponding solvent deionized water or absolute ethyl alcohol respectively in a certain mass ratio, uniformly stirring, mixing the two solutions, uniformly stirring, drying, and grinding, thereby obtaining the composite fixed phase-change energy-accumulation material. The composite fixed phase-change energy-accumulation material is a novel phase-change energy-accumulation material, overcomes the defects that a conventional support material is high in cost, small in amount of accumulation phase-change material, low in heat conduction coefficient and serious in the influence on ambient environment, meets requirements of green chemicals, and has relatively wide prospects.

Description

technical field [0001] The invention belongs to the field of shape-setting phase-change materials, and in particular relates to a preparation method of a composite shape-setting phase-change energy storage material with hydroxyapatite as a supporting material. Background technique [0002] As the population grows and fossil fuels are being consumed, people are turning to new sources of energy. Shape-setting phase change materials have been widely used as a new type of heat storage materials. The shape-setting phase change material adopts the principle of microporous structure packaging material, so as to achieve the effect that the phase change material does not leak before and after the phase change. Composite shape-setting phase-change materials generally consist of two materials: phase-change materials and support materials. Generally, organic materials and inorganic materials are used as supporting materials. Organic materials bring environmental pollution and high cos...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 王成毓张琼柯少佳王亚洲黄彦慧杨如娥
Owner GUANGDONG YIHUA TIMBER IND
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