CN111117572A - Composite phase-change material and preparation method thereof - Google Patents
Composite phase-change material and preparation method thereof Download PDFInfo
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- CN111117572A CN111117572A CN201911235197.6A CN201911235197A CN111117572A CN 111117572 A CN111117572 A CN 111117572A CN 201911235197 A CN201911235197 A CN 201911235197A CN 111117572 A CN111117572 A CN 111117572A
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- 239000012782 phase change material Substances 0.000 title claims abstract description 50
- 239000002131 composite material Substances 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title abstract description 8
- BDKLKNJTMLIAFE-UHFFFAOYSA-N 2-(3-fluorophenyl)-1,3-oxazole-4-carbaldehyde Chemical compound FC1=CC=CC(C=2OC=C(C=O)N=2)=C1 BDKLKNJTMLIAFE-UHFFFAOYSA-N 0.000 claims abstract description 41
- 235000017281 sodium acetate Nutrition 0.000 claims abstract description 41
- 229940087562 sodium acetate trihydrate Drugs 0.000 claims abstract description 41
- 239000002667 nucleating agent Substances 0.000 claims abstract description 27
- 230000008859 change Effects 0.000 claims abstract description 25
- 239000002562 thickening agent Substances 0.000 claims abstract description 23
- 239000002994 raw material Substances 0.000 claims abstract description 19
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical group [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 40
- 238000003756 stirring Methods 0.000 claims description 40
- 108010010803 Gelatin Proteins 0.000 claims description 20
- 238000001816 cooling Methods 0.000 claims description 20
- DGLRDKLJZLEJCY-UHFFFAOYSA-L disodium hydrogenphosphate dodecahydrate Chemical group O.O.O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].OP([O-])([O-])=O DGLRDKLJZLEJCY-UHFFFAOYSA-L 0.000 claims description 20
- 229920000159 gelatin Polymers 0.000 claims description 20
- 239000008273 gelatin Substances 0.000 claims description 20
- 235000019322 gelatine Nutrition 0.000 claims description 20
- 235000011852 gelatine desserts Nutrition 0.000 claims description 20
- 235000011164 potassium chloride Nutrition 0.000 claims description 20
- 239000001103 potassium chloride Substances 0.000 claims description 20
- 238000005303 weighing Methods 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 4
- 239000003607 modifier Substances 0.000 claims description 3
- 239000008247 solid mixture Substances 0.000 claims description 2
- 238000005338 heat storage Methods 0.000 abstract description 7
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 231100000956 nontoxicity Toxicity 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 24
- 238000004781 supercooling Methods 0.000 description 22
- 238000004146 energy storage Methods 0.000 description 17
- 239000011232 storage material Substances 0.000 description 17
- 230000000052 comparative effect Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 238000005191 phase separation Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/06—Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice versa
- C09K5/063—Materials absorbing or liberating heat during crystallisation; Heat storage materials
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- Chemical & Material Sciences (AREA)
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- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
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- Materials Engineering (AREA)
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- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of phase-change materials, and particularly discloses a composite phase-change material which is prepared from the following raw materials in parts by weight: 50-92 parts of sodium acetate trihydrate, 4.5-44 parts of phase change point regulator, 1-3 parts of thickening agent and 1-4 parts of nucleating agent. The composite phase-change material has the advantages of high phase-change latent heat value, large phase-change temperature, adjustable range, wide application range, large heat storage density, small volume expansion rate, stable performance, long service life, no toxicity, no pollution, no corrosion to metal, low price of raw materials, convenience in preparation and wide source.
Description
Technical Field
The invention belongs to the field of phase-change materials, and particularly relates to a composite phase-change material and a preparation method thereof.
Background
A phase change material is a substance with a specific function. It can carry out biological phase change at a specific temperature (phase change temperature) and absorb or emit a large amount of heat along with the phase change process. The storage mode has the advantages of high energy density, stable performance and low cost. Thus, storing the same energy, the latent heat storage device requires much less volume than the sensible heat storage device. This storage may be preferred in many situations where size and mass are limited (e.g., installation of heat storage devices in buildings).
With the increasing shortage of world energy and national energy, the phase change material has special functions, and can be widely applied to the fields of solar energy utilization, industrial waste heat utilization, energy conservation, engineering heat insulation materials, medical care and the like.
Sodium acetate trihydrate is taken as a typical inorganic phase change material, and has the advantages of low price, large mass heat storage density (270kJ/kg), high heat conductivity coefficient, general neutrality and the like; the defects are that the method has serious supercooling phenomenon (supercooling degree is more than 30 ℃) and poor nucleation characteristic, and is easy to separate out and separate after melting. Crystallization is difficult during cooling, latent heat cannot be released, the phase change temperature is difficult to regulate and control, and the application occasions are very limited.
The present invention has been made in view of the above circumstances.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a phase composite phase change material with high latent heat value, large phase change temperature range, large heat storage density and small volume expansion rate.
In order to solve the technical problems, the invention provides a composite phase-change material which is prepared from the following raw materials in parts by weight: 50-92 parts of sodium acetate trihydrate, 4.5-44 parts of phase change point regulator, 1-3 parts of thickening agent and 1-4 parts of nucleating agent.
Further preferably, the composite phase change material is composed of the following raw materials in parts by weight: 85-92 parts of sodium acetate trihydrate, 4.5-11 parts of phase change point regulator, 1-3 parts of thickener and 2-4 parts of nucleating agent.
Further preferably, the composite phase change material is composed of the following raw materials in parts by weight: 80-85 parts of sodium acetate trihydrate, 10-16 parts of a phase change point regulator, 1-2.5 parts of a thickening agent and 2-3 parts of a nucleating agent.
Further preferably, the composite phase change material is composed of the following raw materials in parts by weight: 65-80 parts of sodium acetate trihydrate, 15-33 parts of a phase change point regulator, 1-2 parts of a thickening agent and 1-3 parts of a nucleating agent.
Further preferably, the composite phase change material is composed of the following raw materials in parts by weight: 75-80 parts of sodium acetate trihydrate, 15-22 parts of a phase change point regulator, 1-2 parts of a thickening agent and 2-3 parts of a nucleating agent.
Further preferably, the composite phase change material is composed of the following raw materials in parts by weight: 70-75 parts of sodium acetate trihydrate, 20-27 parts of a phase change point regulator, 1-2 parts of a thickening agent and 2-3 parts of a nucleating agent.
Further preferably, the composite phase change material is composed of the following raw materials in parts by weight: 65-70 parts of sodium acetate trihydrate, 26-33 parts of a phase change point regulator, 1-2 parts of a thickening agent and 1.5-3 parts of a nucleating agent.
Further preferably, the composite phase change material is composed of the following raw materials in parts by weight: the mass ratio of the sodium acetate trihydrate is 60-65, the phase change point regulator is 31-38, the thickening agent is 1-2, and the nucleating agent is 1-3.
Further preferably, the composite phase change material is composed of the following raw materials in parts by weight: 55-60 parts of sodium acetate trihydrate, 36-43 parts of a phase change point regulator, 1-2 parts of a thickening agent and 1-3 parts of a nucleating agent.
Further preferably, the composite phase change material is composed of the following raw materials in parts by weight: 50-55 parts of sodium acetate trihydrate, 41-46 parts of a phase change point regulator, 1-2 parts of a thickening agent and 1-3 parts of a nucleating agent.
Further preferably, the transformation point modifier is potassium chloride.
Further preferably, the nucleating agent is disodium hydrogen phosphate dodecahydrate.
Further preferably, the thickener is gelatin.
Further preferably, the volume expansion rate of the composite phase change material is less than or equal to 10%.
Further preferably, the phase transition temperature of the composite phase change material is 42-58 ℃.
The invention also aims to provide a preparation method of the composite phase-change material, which comprises the following steps:
(1) weighing solid sodium acetate trihydrate, a phase change point regulator, a nucleating agent and a thickening agent according to a ratio;
(2) adding sodium acetate trihydrate, a phase change point regulator and a nucleating agent into a reaction container, and stirring the reaction container in a constant temperature environment of 65-75 ℃ for a certain time until a solid mixture becomes a liquid mixture;
(3) adding a thickening agent into the reaction vessel filled with the liquid intermediate, and continuing to stir for a certain time until the liquid mixture becomes a uniform colloidal mixture;
(4) and standing and cooling the colloidal mixture to obtain the composite phase-change material.
Further preferably, the solid sodium acetate trihydrate, the phase transition point regulator and the nucleating agent are added into the reaction vessel and then stirred for 30min at 70 ℃, and the thickening agent is added and then stirred for 30min
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
(1) the composite phase-change material has the advantages of high phase-change latent heat value, large phase-change temperature, adjustable range, wide application range, large heat storage density, small volume expansion rate, stable performance, long service life, no toxicity, no pollution, no corrosion to metal, low price of raw materials, convenience in preparation and wide source.
(2) The composite phase-change material solves the problem of supercooling of the inorganic phase-change material sodium acetate trihydrate, avoids phase separation, improves the recycling frequency, prolongs the service life, adjusts the phase-change point and enlarges the application range.
(3) The raw materials of the composite phase-change material are all solid raw materials and do not contain water, so that the stability of a system can be ensured, and the phenomenon that the nucleating agent is dissolved in water and cannot be combined with other components to lose the effects of weakening supercooling and phase separation of the system is avoided.
The following describes in further detail embodiments of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, which are used for illustrating the present invention and are not intended to limit the scope of the present invention.
Example 1: weighing 92 parts by weight of sodium acetate trihydrate, 2 parts by weight of disodium hydrogen phosphate dodecahydrate and 4.5 parts by weight of potassium chloride, heating to 70 ℃ at constant temperature in a water bath kettle, stirring for 30 minutes, adding 1.5 parts by weight of gelatin, continuing heating and stirring for 30 minutes, and then standing and cooling to obtain the uniformly mixed phase-change energy storage material. Tests show that the phase-change temperature of the component is 55 ℃, the supercooling degree is 5 ℃, and the latent heat value is 248 kJ/kg.
Example 2: weighing 87.1 parts by weight of sodium acetate trihydrate, 2.4 parts by weight of disodium hydrogen phosphate dodecahydrate and 8.7 parts by weight of potassium chloride, heating to 70 ℃ at constant temperature in a water bath kettle, stirring for 30 minutes, adding 1.8 parts by weight of gelatin, continuing heating and stirring for 30 minutes, and then standing and cooling to obtain the uniformly mixed phase-change energy storage material. Tests show that the phase-change temperature of the component is 52 ℃, the supercooling degree is 2.2 ℃, and the latent heat value is 235 kJ/kg.
Example 3: weighing 85 parts by weight of sodium acetate trihydrate, 3 parts by weight of disodium hydrogen phosphate dodecahydrate and 10.5 parts by weight of potassium chloride, heating to 70 ℃ at constant temperature in a water bath kettle, stirring for 30 minutes, adding 1.5 parts by weight of gelatin, continuing heating and stirring for 30 minutes, and then standing and cooling to obtain the uniformly mixed phase-change energy storage material. Tests show that the phase-change temperature of the component is 51 ℃, the supercooling degree is 3 ℃, and the latent heat value is 230 kJ/kg.
Example 4: weighing 83.5 parts by weight of sodium acetate trihydrate, 2.5 parts by weight of disodium hydrogen phosphate dodecahydrate and 12.5 parts by weight of potassium chloride, heating to 70 ℃ at constant temperature in a water bath kettle, stirring for 30 minutes, adding 1.5 parts by weight of gelatin, continuing heating and stirring for 30 minutes, and then standing and cooling to obtain the uniformly mixed phase-change energy storage material. Tests show that the phase-change temperature of the component is 51 ℃, the supercooling degree is 3 ℃, and the latent heat value is 225 kJ/kg.
Example 5: weighing 80 parts by weight of sodium acetate trihydrate, 2.5 parts by weight of disodium hydrogen phosphate dodecahydrate and 15.5 parts by weight of potassium chloride, heating to 70 ℃ at constant temperature in a water bath kettle, stirring for 30 minutes, adding 2 parts by weight of gelatin, continuing heating and stirring for 30 minutes, and then standing and cooling to obtain the uniformly mixed phase-change energy storage material. Tests show that the phase-change temperature of the component is 50 ℃, the supercooling degree is 2.4 ℃, and the latent heat value is 216 kJ/kg.
Example 6: weighing 77.3 parts by weight of sodium acetate trihydrate, 2 parts by weight of disodium hydrogen phosphate dodecahydrate and 18.7 parts by weight of potassium chloride, heating to 70 ℃ at constant temperature in a water bath kettle, stirring for 30 minutes, adding 2 parts by weight of gelatin, continuing heating and stirring for 30 minutes, and then standing and cooling to obtain the uniformly mixed phase-change energy storage material. Tests show that the phase-change temperature of the component is 49 ℃, the supercooling degree is 1.8 ℃, and the latent heat value is 208 kJ/kg.
Example 7: weighing 75 parts by weight of sodium acetate trihydrate, 2.7 parts by weight of disodium hydrogen phosphate dodecahydrate and 21.3 parts by weight of potassium chloride, heating to 70 ℃ at constant temperature in a water bath kettle, stirring for 30 minutes, adding 1 part by weight of gelatin, continuing heating and stirring for 30 minutes, and then standing and cooling to obtain the uniformly mixed phase-change energy storage material. Tests show that the phase-change temperature of the component is 49 ℃, the supercooling degree is 3 ℃, and the latent heat value is 202 kJ/kg.
Example 8: weighing 72.4 parts by weight of sodium acetate trihydrate, 2 parts by weight of disodium hydrogen phosphate dodecahydrate and 24.1 parts by weight of potassium chloride, heating to 70 ℃ at constant temperature in a water bath kettle, stirring for 30 minutes, adding 1.5 parts by weight of gelatin, continuing heating and stirring for 30 minutes, and then standing and cooling to obtain the uniformly mixed phase-change energy storage material. Tests show that the phase-change temperature of the component is 48 ℃, the supercooling degree is 2.2 ℃, and the latent heat value is 195 kJ/kg.
Example 9: weighing 70 parts by weight of sodium acetate trihydrate, 2.2 parts by weight of disodium hydrogen phosphate dodecahydrate and 26.7 parts by weight of potassium chloride, heating to 70 ℃ at constant temperature in a water bath kettle, stirring for 30 minutes, adding 1.1 parts by weight of gelatin, continuously heating and stirring for 30 minutes, and then standing and cooling to obtain the uniformly mixed phase-change energy storage material. Tests show that the phase-change temperature of the component is 48 ℃, the supercooling degree is 3.2 ℃, and the latent heat value is 189 kJ/kg.
Example 10: weighing 66.6 parts by weight of sodium acetate trihydrate, 1.5 parts by weight of disodium hydrogen phosphate dodecahydrate and 30 parts by weight of potassium chloride, heating to 70 ℃ at constant temperature in a water bath kettle, stirring for 30 minutes, adding 1.9 parts by weight of gelatin, continuing heating and stirring for 30 minutes, and then standing and cooling to obtain the uniformly mixed phase-change energy storage material. Tests show that the phase-change temperature of the component is 47 ℃, the supercooling degree is 3 ℃, and the latent heat value is 180 kJ/kg.
Example 11: weighing 65 parts by weight of sodium acetate trihydrate, 2 parts by weight of disodium hydrogen phosphate dodecahydrate and 32 parts by weight of potassium chloride, heating to 70 ℃ at constant temperature in a water bath kettle, stirring for 30 minutes, adding 1 part by weight of gelatin, continuing heating and stirring for 30 minutes, and then standing and cooling to obtain the uniformly mixed phase-change energy storage material. Tests show that the phase-change temperature of the component is 46 ℃, the supercooling degree is 5 ℃, and the latent heat value is 175 kJ/kg.
Example 12: weighing 64.6 parts by weight of sodium acetate trihydrate, 2.1 parts by weight of disodium hydrogen phosphate dodecahydrate and 32.3 parts by weight of potassium chloride, heating to 70 ℃ at constant temperature in a water bath kettle, stirring for 30 minutes, adding 1 part by weight of gelatin, continuing heating and stirring for 30 minutes, and then standing and cooling to obtain the uniformly mixed phase-change energy storage material. Tests show that the phase-change temperature of the component is 46 ℃, the supercooling degree is 4.6 ℃, and the latent heat value is 175 kJ/kg.
Example 13: weighing 60 parts by weight of sodium acetate trihydrate, 1 part by weight of disodium hydrogen phosphate dodecahydrate and 37 parts by weight of potassium chloride, heating to 70 ℃ at constant temperature in a water bath kettle, stirring for 30 minutes, adding 2 parts by weight of gelatin, continuing heating and stirring for 30 minutes, and then standing and cooling to obtain the uniformly mixed phase-change energy storage material. Tests show that the phase-change temperature of the component is 45 ℃, the supercooling degree is 3.3 ℃, and the latent heat value is 161 kJ/kg.
Example 14: weighing 57.2 parts by weight of sodium acetate trihydrate, 2.2 parts by weight of disodium hydrogen phosphate dodecahydrate and 39 parts by weight of potassium chloride, heating to 70 ℃ at constant temperature in a water bath kettle, stirring for 30 minutes, adding 1.6 parts by weight of gelatin, continuing heating and stirring for 30 minutes, and then standing and cooling to obtain the uniformly mixed phase-change energy storage material. Tests show that the phase-change temperature of the component is 44 ℃, the supercooling degree is 2.6 ℃, and the latent heat value is 154 kJ/kg.
Example 15: weighing 55 parts by weight of sodium acetate trihydrate, 2 parts by weight of disodium hydrogen phosphate dodecahydrate and 42 parts by weight of potassium chloride, heating to 70 ℃ at constant temperature in a water bath kettle, stirring for 30 minutes, adding 1 part by weight of gelatin, continuing heating and stirring for 30 minutes, and then standing and cooling to obtain the uniformly mixed phase-change energy storage material. Tests show that the phase-change temperature of the component is 43 ℃, the supercooling degree is 2.6 ℃, and the latent heat value is 148 kJ/kg.
Example 16: weighing 52.7 parts by weight of sodium acetate trihydrate, 2 parts by weight of disodium hydrogen phosphate dodecahydrate and 43.3 parts by weight of potassium chloride, heating to 70 ℃ at constant temperature in a water bath kettle, stirring for 30 minutes, adding 2 parts by weight of gelatin, continuing heating and stirring for 30 minutes, and then standing and cooling to obtain the uniformly mixed phase-change energy storage material. Tests show that the phase-change temperature of the component is 43 ℃, the supercooling degree is 2 ℃, and the latent heat value is 142 kJ/kg.
Example 17: weighing 50 parts by weight of sodium acetate trihydrate, 3 parts by weight of disodium hydrogen phosphate dodecahydrate and 45 parts by weight of potassium chloride, heating to 70 ℃ at constant temperature in a water bath kettle, stirring for 30 minutes, adding 2 parts by weight of gelatin, continuing heating and stirring for 30 minutes, and then standing and cooling to obtain the uniformly mixed phase-change energy storage material. Tests show that the phase-change temperature of the component is 42 ℃, the supercooling degree is 2 ℃, and the latent heat value is 135 kJ/kg.
Comparative example:
the comparative example is a composite phase change material prepared from the raw materials of example 1 according to the preparation method of Chinese application No. 201611066983.4, and the preparation method is as follows:
weighing 92 parts by weight of sodium acetate trihydrate and 4.5 parts by weight of phase change point regulator potassium chloride according to the proportion, adding the materials into a reaction container, and setting the reaction temperature to be 65-75 ℃; after complete dissolution, adding deionized water; adding 1.5 parts by weight of thickening agent gelatin, and quickly stirring; grinding and crushing 2 parts by weight of nucleating agent disodium hydrogen phosphate dodecahydrate, adding the crushed powder into a reaction vessel, and uniformly stirring to obtain the nucleating agent.
Test example:
comparing the latent heat values of the composite phase change material prepared in the comparative example with the phase change material prepared in example 1, the results are as follows:
| item | Example 1 | Comparative example |
| Phase transition temperature | 55℃ | 55℃ |
| Latent heat value | 248kJ/kg | 185kJ/kg |
From the above comparative data, it can be seen that the latent heat value of the composite phase change material prepared in comparative example 1 is significantly lower than that of example 1 of the present invention, because the addition of deionized water in the comparative example causes part of the nucleating agent to dissolve therein, resulting in a decrease in the content of the nucleating agent combined with other components to prevent supercooling and inhibit phase separation, and on the other hand, the addition of deionized water lowers the melting point of the material, and the escape of water impairs this effect. In addition, because latent heat is mainly released by the main material sodium acetate trihydrate, the smaller the proportion of the main material in the total content is, the smaller the latent heat quantity is, and the deionized water is added in the comparative example, the content of the main material is inevitably reduced, so that the latent heat value of the phase-change material is lower than that of the phase-change material in the embodiment 1.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The composite phase change material is characterized by comprising the following raw materials in parts by weight: 50-92 parts of sodium acetate trihydrate, 4.5-44 parts of phase change point regulator, 1-3 parts of thickening agent and 1-4 parts of nucleating agent.
2. The composite phase change material according to claim 1, wherein the composite phase change material is prepared from the following raw materials in parts by weight: 85-92 parts of sodium acetate trihydrate, 4.5-11 parts of phase change point regulator, 1-2.5 parts of thickening agent and 2-4 parts of nucleating agent.
3. The composite phase change material as claimed in claim 1, wherein the composite phase change material is prepared from the following raw materials in parts by weight: 65-85 parts of sodium acetate trihydrate, 10-33 parts of a phase change point regulator, 1-3 parts of a thickening agent and 1.5-3 parts of a nucleating agent.
4. A composite phase change material according to any of claims 1-3, characterized in that the phase change point modifier is potassium chloride.
5. A composite phase change material according to any of claims 1-3, characterized in that the nucleating agent is disodium hydrogen phosphate dodecahydrate.
6. A composite phase change material according to any of claims 1-3, characterized in that the thickener is gelatin.
7. A composite phase change material according to any of claims 1-3, characterized in that the volume expansion of the composite phase change material is less than or equal to 10%.
8. The composite phase change material as claimed in any one of claims 1 to 3, wherein the phase transition temperature of the composite phase change material is 42 to 58 ℃.
9. A method for preparing the composite phase change material of any one of claims 1 to 8, characterized by comprising the following steps:
(1) weighing solid sodium acetate trihydrate, a phase change point regulator, a nucleating agent and a thickening agent according to a ratio;
(2) adding sodium acetate trihydrate, a phase change point regulator and a nucleating agent into a reaction container, and stirring the reaction container in a constant temperature environment of 65-75 ℃ for a certain time until a solid mixture becomes a liquid mixture;
(3) adding a thickening agent into the reaction vessel filled with the liquid intermediate, and continuing to stir for a certain time until the liquid mixture becomes a uniform colloidal mixture;
(4) and standing and cooling the colloidal mixture to obtain the composite phase-change material.
10. The method for preparing the composite phase-change material according to claim 9, wherein the solid sodium acetate trihydrate, the phase-change point modifier and the nucleating agent are added into a reaction vessel, and then stirred for 30min at 70 ℃, and the thickener is added and then stirred for 30 min.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112480876A (en) * | 2020-12-24 | 2021-03-12 | 西北大学 | Phase change heat storage material compounded by sodium acetate trihydrate and disodium hydrogen phosphate dodecahydrate |
| CN112552880A (en) * | 2020-12-16 | 2021-03-26 | 南通融盛智能科技有限公司 | Phase change energy storage material and thermal management system |
| CN113563849A (en) * | 2021-07-14 | 2021-10-29 | 北京航天发射技术研究所 | Phase change device and method for heating medium by phase change device |
| CN113881405A (en) * | 2021-10-19 | 2022-01-04 | 佛山市顺德区美的洗涤电器制造有限公司 | Phase-change material composition, phase-change material, and preparation method and application thereof |
| CN114032074A (en) * | 2021-12-03 | 2022-02-11 | 深圳市爱能森科技有限公司 | Phase-change heat storage material and preparation method thereof |
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