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Self-healing hydrogel phase-change material and preparation method thereof

A technology of phase change materials and inorganic phase change materials, which is applied in the field of self-healing hydrogel phase change materials and its preparation, can solve the problems of inability to protect the phase change materials and poor mechanical properties of hydrogels, and achieve the elimination of phase change materials. Effects of separation phenomenon, high latent heat of phase change, and high thermal conductivity

Pending Publication Date: 2021-09-17
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, hydrogels prepared using traditional organic cross-linking agents have poor mechanical properties due to weak cross-linking effects, and will break under small deformation or pressure, which cannot protect phase change materials. Improving the mechanical properties of hydrogels is the key to their applications

Method used

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  • Self-healing hydrogel phase-change material and preparation method thereof
  • Self-healing hydrogel phase-change material and preparation method thereof
  • Self-healing hydrogel phase-change material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) take by weighing 40g sodium sulfate decahydrate, melt under the airtight situation of 40 degrees centigrade in water bath;

[0039] (2) Weigh 1.6g of borax, 0.04g of sodium hexametaphosphate and 1.2g of sodium acrylate, and pour them into molten sodium sulfate decahydrate solution successively, keep the temperature of the water bath at 40 degrees centigrade and heat tightly, and stir until the solution is evenly dispersed;

[0040] (3) Add 0.2g of N,N-methylenebisacrylamide, 0.08g of sodium alginate, and 0.4g of calcium sulfate dihydrate to the dispersion obtained in step (2), heat the water bath at 40 degrees Celsius, and stir until the solution is evenly dispersed (Continue to stir for about 20 minutes until the solution is evenly stirred and no stratification occurs);

[0041] (4) Pour 0.6g initiator ammonium persulfate into 4g of deionized water, after fully dissolving, add the ammonium persulfate initiator solution drop by drop, during which the heating tempera...

Embodiment 2

[0046] (1) Take by weighing 40g disodium hydrogen phosphate dodecahydrate, melt under the airtight situation of 45 degrees centigrade in water bath;

[0047] (2) Weigh 1.6g of sodium citrate dihydrate, 0.04g of sodium hexametaphosphate and 1.2g of sodium acrylate, and pour them into molten disodium hydrogen phosphate dodecahydrate solution successively, keep the water bath temperature at 45 degrees Celsius, and stir until The solution is evenly dispersed;

[0048] (3) Add 0.2g of N,N-methylenebisacrylamide, 0.08g of sodium alginate, and 0.4g of calcium sulfate dihydrate to the dispersion obtained in step (2), keep the temperature of the water bath at 45 degrees Celsius and heat, and stir until the solution is evenly dispersed (Continue to stir for about 20 minutes until the solution is evenly stirred and no stratification occurs);

[0049] (4) Pour 0.6g initiator potassium persulfate into 4g deionized water, after fully dissolving, add potassium persulfate initiator solution ...

Embodiment 3

[0054] (1) take by weighing 40g sodium acetate trihydrate, melt under the airtight situation of 58 degrees centigrade in water bath;

[0055] (2) Weigh 2g of disodium hydrogen phosphate dodecahydrate, 0.04g of sodium hexametaphosphate and 1.2g of chitosan and pour them into molten sodium acetate trihydrate solution successively, keep the temperature of the water bath at 58 degrees Celsius, and stir until the solution Evenly dispersed;

[0056] (3) Add 0.2g of N,N-methylenebisacrylamide, 0.08g of sodium alginate, and 0.4g of calcium sulfate dihydrate to the dispersion obtained in step (2), keep the temperature of the water bath at 58 degrees Celsius and heat, and stir until the solution is evenly dispersed (Continue to stir for about 20 minutes until the solution is evenly stirred and no stratification occurs);

[0057] (4) Add 1.2g of photoinitiator 1173 dropwise to the above solution, and then add 4g of deionized water, during which the heating temperature of the water bath ...

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Abstract

The invention discloses a self-healing hydrogel phase-change material and a preparation method thereof. The material comprises an inorganic phase-change material, a hydrogel base material, a nucleating agent and a crystal form modifier, wherein the hydrogel base material comprises a monomer with a self-healing function, a salt-tolerant monomer, a main cross-linking agent, an auxiliary cross-linking agent, an initiator and deionized water. The preparation method comprises the following steps: preparing an inorganic phase-change material melt; and uniformly dispersing a nucleating agent, a crystal form modifier, a cross-linking monomer and a cross-linking agent according to a certain proportion, finally adding a proper amount of deionized water and an initiator, and stirring and cross-linking. According to the invention, the self-healing hydrogel phase-change material is cross-linked and self-healed to form a hydrogel by using a monomer with a hydrogen bond, so that the hydrogel can be self-healed without external force even if the hydrogel is broken; and the hydrogel phase-change material has relatively high thermal conductivity, is low in price, is green and environment-friendly, and is simple in production process.

Description

technical field [0001] The invention relates to the technical field of phase change materials, in particular to a self-healing hydrogel phase change material and a preparation method thereof. Background technique [0002] Phase change materials (PCMs) are energy materials that absorb or release latent heat to the outside by undergoing a phase change at a certain temperature, thereby achieving the purpose of temperature regulation. The process of changing the material properties of phase change materials is accompanied by the storage and release of energy, which can effectively improve the utilization rate of energy. In today's society where energy problems are more prominent, this feature of phase change materials has won a higher degree of attention. [0003] Phase change materials can be divided into organic phase change materials and inorganic phase change materials, and can also be divided into hydrated salt phase change materials and waxy phase change materials. Among ...

Claims

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Application Information

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IPC IPC(8): C08F251/00C08F220/06C08F222/38C08F220/56C08F2/44C08K3/00C08K3/30C08K3/38C08K3/32C08K5/098C08K13/02C09K5/06
CPCC08F251/00C08F2/44C08K3/00C08K3/30C08K3/38C08K3/32C08K5/098C08K13/02C09K5/063C08K2003/3045C08K2003/387C08K2003/324C08K2201/014C08F220/06C08F222/385C08F220/56
Inventor 林鹏程骆滢滢陈颖盛鑫鑫
Owner GUANGDONG UNIV OF TECH
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