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Composite phase-change material used at temperature of 2-8 DEG C and preparation method thereof

A composite phase change material and phase change material technology, which is applied in the field of 2-8°C composite phase change material and its preparation, can solve the problems of reducing energy storage, small thermal conductivity, and easy oxidation of phase change materials, and achieve the purpose of inhibiting phase change. Stratification, less undercooling, and reduced phase separation

Inactive Publication Date: 2018-07-06
四川微松新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of composite energy storage materials can effectively solve the various deficiencies in the practical application of solid-liquid PCM: such as the change of volume expansion and contraction during phase transition, the generation and leakage of liquid, the small thermal conductivity of organic materials, and the easy Oxidation, layering of inorganic hydrated salts, corrosion, etc. However, when adding other functional materials, the storage energy of the phase change material will be reduced

Method used

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  • Composite phase-change material used at temperature of 2-8 DEG C and preparation method thereof
  • Composite phase-change material used at temperature of 2-8 DEG C and preparation method thereof

Examples

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Effect test

Embodiment 1

[0020] A method for preparing a composite phase change material at 2-8°C includes the following steps:

[0021] Step 1: Place the anhydrous sodium sulfate raw material in a blast drying box and dry it to constant weight at 100°C;

[0022] Step 2: According to the mass parts of each raw material, weigh 35 parts of anhydrous sodium sulfate, 5 parts of sodium chloride, 10 parts of potassium chloride, 20 parts of ammonium chloride, 2 parts of boric acid, 2 parts Borax, 1 part of sodium carboxymethyl cellulose, 1 part of hydrophilic aerogel are mixed, and then ground in a ball mill until the particle size of the mixture reaches 80-100μm;

[0023] Step 3: Add 24 parts of distilled water to the ground mixture and stir it into a uniform molten slurry at 40°C to obtain a 2-8°C composite phase change material.

Embodiment 2

[0025] A method for preparing a composite phase change material at 2-8°C includes the following steps:

[0026] Step 1: Place the anhydrous sodium sulfate raw material in a blast drying box and dry it to constant weight at 110°C;

[0027] Step 2: According to the mass parts of each raw material, weigh 50 parts of anhydrous sodium sulfate, 8 parts of sodium chloride, 10 parts of potassium chloride, 15 parts of ammonium chloride, 3 parts of boric acid, 3 parts Borax, 2 parts of sodium carboxymethyl cellulose, 3 parts of hydrophilic aerogel are mixed, and then ground in a ball mill until the particle size of the mixture reaches 90-120μm;

[0028] Step 3: Add 40 parts of distilled water to the ground mixture and stir at 50°C to form a uniform molten slurry to obtain a 2-8°C composite phase change material.

Embodiment 3

[0030] A method for preparing a composite phase change material at 2-8°C includes the following steps:

[0031] Step 1: Place the anhydrous sodium sulfate raw material in a blast drying box and dry it to constant weight at 110°C;

[0032] Step 2: According to the mass parts of each raw material, weigh 40 parts of anhydrous sodium sulfate, 8 parts of sodium chloride, 15 parts of potassium chloride, 15 parts of ammonium chloride, 2.5 parts of boric acid, 2.5 parts Borax, 4 parts of sodium carboxymethyl cellulose, 1 part of hydrophilic aerogel were mixed, and then ground in a ball mill until the particle size of the mixture reached 200-240μm;

[0033] Step 3: Add 50 parts of distilled water to the ground mixture, and stir at 60°C to form a uniform molten slurry to obtain a 2-8°C composite phase change material.

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Abstract

The invention discloses a method for preparing a composite phase-change material used at a temperature of 2-8 DEG C. The method comprises the following steps of: (1) placing an anhydrous-sodium-sulfate raw material in a blast drying oven, and drying to be constant weight at a temperature of 90-110 DEG C; (2) according to the parts by mass of all raw materials, respectively weighing 30-50 parts ofanhydrous sodium sulfate, 5-10 parts of sodium chloride, 10-20 parts of potassium chloride, 10-20 parts of ammonium chloride, 1-5 parts of boric acid, 1-5 parts of borax, 0.5-5 parts of sodium carboxymethyl cellulose, 0.5-5 parts of hydrophilic aerogel for mixing, grinding in a ball grinder till the granularity of the mixture is 50-300mu m; (3) adding 20-50 parts of distilled water into the groundmxiture, stirring to be fused slurry at a temperature of 40-60 DEG C. The method disclosed by the invention has the advantages of simple process and lower cost; the prepared phase-change material hasthe advantages of low supercooling degree, high energy-storage density, no-phase separation, stable property and capabilities of fast cold storage and slow cold release.

Description

Technical field [0001] The invention belongs to the field of phase change materials, and specifically relates to a 2-8°C composite phase change material and a preparation method thereof. Background technique [0002] Phase change material (PCM) refers to a substance that changes the state of a substance with temperature changes and can provide latent heat. The process of transforming its physical properties is called a phase change process. At this time, the phase change material will absorb or release a large amount of latent heat. For solid-liquid phase change materials, the mechanism of action is: when the phase change material transforms from liquid to solid, the material releases heat to the environment, on the contrary, absorbs heat from the environment, and the energy stored or released when the physical state changes is called Latent heat of phase change. The temperature range of the phase change is very narrow. When the physical state changes, the temperature of the mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/066Y02E60/14
Inventor 严云张松涛何令华杨旭
Owner 四川微松新材料有限公司
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