CN112480871A - Inorganic phase-change material with phase-change temperature of 5 ℃ and preparation method thereof - Google Patents
Inorganic phase-change material with phase-change temperature of 5 ℃ and preparation method thereof Download PDFInfo
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- CN112480871A CN112480871A CN202011271745.3A CN202011271745A CN112480871A CN 112480871 A CN112480871 A CN 112480871A CN 202011271745 A CN202011271745 A CN 202011271745A CN 112480871 A CN112480871 A CN 112480871A
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Abstract
The invention discloses an inorganic phase-change material with a phase-change temperature of 5 ℃ and a preparation method thereof, wherein the inorganic phase-change material comprises the following components in parts by weight: 60-80 parts of sodium sulfate decahydrate, 12-25 parts of potassium chloride, 10-15 parts of ammonium chloride, 3-5 parts of sodium nitrate, 3-5 parts of borax and nano SiO21-2 parts of thickening agent, 11-15 parts of inorganic thickening agent, 4-10 parts of nano C powder and 120-170 parts of deionized water. The phase change temperature of the inorganic phase change material prepared by the invention is 5 ℃, the supercooling degree is 1.5 ℃, the phase change latent heat reaches 146.5KJ/KG, the inorganic phase change material can be recycled for more than 10000 times, the phase change process is reversible, the process is simple, the product recycling rate is high, the large-scale production can be realized, and the prepared inorganic phase change material is non-toxic and non-combustible, has high energy storage density, small volume, constant temperature control, obvious energy-saving effect, wide phase change temperature selection range and easy control.
Description
Technical Field
The invention relates to the technical field of preparation of inorganic phase change materials, in particular to an inorganic phase change material with a phase change temperature of 5 ℃ and a preparation method thereof.
Background
A Phase Change Material (PCM-Phase Change Material) refers to a substance that changes the state of a substance with a Change in temperature and can provide latent heat, and a process of changing a physical property is called a Phase Change process, and when the Phase Change Material absorbs or releases a large amount of latent heat. When the physical state changes, the temperature of the material itself is almost kept unchanged before the phase change is completed, a wide temperature platform is formed, although the temperature is unchanged, the latent heat absorbed or released is quite large, so the functions of the phase change material can be summarized as two points: constant temperature and energy storage, which are also dual properties of phase change materials. The common phase-change material is water, and the interconversion between liquid water and solid ice is a common phase-change process, but the ice volume is too large, so that the dissolving process needs a long time, and the latent heat provided is less, so that the ice phase-change material cannot be effectively and widely applied.
At present, phase-change materials are widely researched and applied in the fields of aviation, buildings, refrigeration equipment, communication, electric power and the like, for example: aviation aspect: by utilizing the constant temperature characteristic of the phase change material, the phase change material is applied to the space suit to help astronauts resist the environment temperature which is changed violently in space, so that the astronauts are in the temperature at which human beings normally live; the phase change material is applied to equipment such as a satellite, so that the equipment can be in a normal working temperature environment. In the aspect of refrigeration equipment: the refrigerating machine is mainly applied to equipment such as air conditioners, refrigerated vehicles, cold storages and the like, the traditional method utilizes the refrigerating machine to keep the temperature constant at a specific temperature required by the environment or the storage, utilizes the latent heat refrigerating principle of phase-change materials, can better meet the requirement in the aspect of refrigeration, and saves electric power.
Disclosure of Invention
The invention mainly aims at the problems in the prior art and provides an inorganic phase-change material with the phase-change temperature of 5 ℃ and a preparation method thereof, wherein the inorganic phase-change material comprises the following components in parts by weight: 60-80 parts of sodium sulfate decahydrate, 12-25 parts of potassium chloride, 10-15 parts of ammonium chloride, 3-5 parts of sodium nitrate, 3-5 parts of borax, 11-15 parts of nano SiO 21-2 parts of thickening agent, 4-10 parts of inorganic thickening agent, 0.5 part of nano C powder and 120-170 parts of deionized water, wherein the preparation method of the inorganic phase change material comprises the following specific steps:
the method comprises the following steps: placing 80-100 parts of water at 52-60 deg.C into a preparation vessel, slowly adding sodium sulfate decahydrate, stirring, and standing at constant temperature of 52-60 deg.C for 20-30 min to obtain solution A;
step two: sequentially putting potassium chloride, ammonium chloride, sodium nitrate and borax into a preparation dish, adding 30-50 parts of deionized water for dissolving, fully and uniformly mixing to obtain a solution B, slowly adding the solution B into the solution A, and continuously and uniformly stirring to obtain a solution C;
step three: putting 10-20 parts of water into a preparation dish, sequentially adding the nano SiO2, the nano C powder, the thickening agent and the inorganic thickening agent into the preparation dish, and fully and uniformly stirring to obtain a solution D;
step four: and slowly adding the solution D into the solution C, uniformly stirring at the temperature of 70-90 ℃, keeping the constant temperature for 30-40 min, and naturally cooling to room temperature to obtain the inorganic phase change material.
Preferably, the thickener is one or a combination of more of carboxymethyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl cellulose, polyvinyl alcohol and polyvinylpyrrolidone.
Preferably, the inorganic thickener is one or a combination of more of diatomite, silica gel, sodium bentonite and attapulgite.
Preferably, the phase change temperature of the inorganic phase change material is 5 ℃, the supercooling degree is 1.5 ℃, and the latent heat of phase change is 146.5 KJ/KG.
Compared with the prior art, the invention has the beneficial effects that:
the phase change temperature of the inorganic phase change material prepared by the invention is 5 ℃, the supercooling degree is 1.5 ℃, the phase change latent heat reaches 146.5KJ/KG, the inorganic phase change material can be recycled for more than 10000 times, the phase change process is reversible, the process is simple, the product recycling rate is high, the large-scale production can be realized, and the prepared inorganic phase change material is non-toxic and non-combustible, has high energy storage density, small volume, constant temperature control, obvious energy-saving effect, wide phase change temperature selection range and easy control.
Drawings
FIG. 1 is a schematic flow chart of a process for preparing an inorganic phase-change material according to the present invention;
FIG. 2 is a graph of temperature control capability versus time for the inorganic phase change material of example 1 of the present invention;
FIG. 3 is a graph of recondensation temperature versus time for the inorganic phase change material of example 1 of the present invention.
Detailed Description
Example 1
As shown in the attached figure 1, an inorganic phase-change material with the phase-change temperature of 5 ℃ and a preparation method thereof are disclosed, wherein the inorganic phase-change material comprises the following components in parts by weight: 60-80 parts of sodium sulfate decahydrate, 12-25 parts of potassium chloride, 10-15 parts of ammonium chloride, 3-5 parts of sodium nitrate, 3-5 parts of borax, 11-15 parts of nano SiO 21-2 parts of thickening agent, 4-10 parts of inorganic thickening agent, 0.5 part of nano C powder and 120-170 parts of deionized water, wherein the preparation method of the inorganic phase change material comprises the following specific steps:
the method comprises the following steps: placing 80-100 parts of water at 52-60 deg.C into a preparation vessel, slowly adding sodium sulfate decahydrate, stirring, and standing at constant temperature of 52-60 deg.C for 20-30 min to obtain solution A;
step two: sequentially putting potassium chloride, ammonium chloride, sodium nitrate and borax into a preparation dish, adding 30-50 parts of deionized water for dissolving, fully and uniformly mixing to obtain a solution B, slowly adding the solution B into the solution A, and continuously and uniformly stirring to obtain a solution C;
step three: putting 10-20 parts of water into a preparation dish, sequentially adding the nano SiO2, the nano C powder, the thickening agent and the inorganic thickening agent into the preparation dish, and fully and uniformly stirring to obtain a solution D;
step four: and slowly adding the solution D into the solution C, uniformly stirring at the temperature of 70-90 ℃, keeping the constant temperature for 30-40 min, and naturally cooling to room temperature to obtain the inorganic phase change material.
Specifically, the thickener is one or a combination of more of carboxymethyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl cellulose, polyvinyl alcohol and polyvinylpyrrolidone.
Specifically, the inorganic thickener is one or a combination of more of diatomite, silica gel, sodium bentonite and attapulgite.
Specifically, the phase change temperature of the inorganic phase change material is 5 ℃, the supercooling degree is 1.5 ℃, and the phase change latent heat is 146.5 KJ/KG.
Example 2
An inorganic phase-change material with a phase-change temperature of 5 ℃ and a preparation method thereof, wherein the inorganic phase-change material comprises the following components in parts by weight: 60-80 parts of sodium sulfate decahydrate, 12-25 parts of potassium chloride, 10-15 parts of ammonium chloride, 3-5 parts of sodium nitrate, 3-5 parts of borax, 11-15 parts of nano SiO 21-2 parts of thickening agent, 4-10 parts of inorganic thickening agent, 0.5 part of nano C powder and 120-170 parts of deionized water, wherein the preparation method of the inorganic phase change material comprises the following specific steps:
the method comprises the following steps: placing 80-100 parts of water at 52-60 deg.C into a preparation vessel, slowly adding sodium sulfate decahydrate, stirring, and standing at constant temperature of 52-60 deg.C for 20-30 min to obtain solution A;
step two: sequentially putting potassium chloride, ammonium chloride, sodium nitrate and borax into a preparation dish, adding 30-50 parts of deionized water for dissolving, fully and uniformly mixing to obtain a solution B, slowly adding the solution B into the solution A, and continuously and uniformly stirring to obtain a solution C;
step three: putting 10-20 parts of water into a preparation dish, sequentially adding the nano SiO2, the nano C powder, the thickening agent and the inorganic thickening agent into the preparation dish, and fully and uniformly stirring to obtain a solution D;
step four: and slowly adding the solution D into the solution C, uniformly stirring at the temperature of 70-90 ℃, keeping the constant temperature for 30-40 min, and naturally cooling to room temperature to obtain the inorganic phase change material.
Specifically, the phase change temperature of the inorganic phase change material is 5 ℃, the supercooling degree is 1.5 ℃, and the phase change latent heat is 146.5 KJ/KG.
Example 3
An inorganic phase-change material with a phase-change temperature of 5 ℃ and a preparation method thereof, wherein the inorganic phase-change material comprises the following components in parts by weight: 60-80 parts of sodium sulfate decahydrate, 12-25 parts of potassium chloride, 10-15 parts of ammonium chloride, 3-5 parts of sodium nitrate, 3-5 parts of borax, 11-15 parts of nano SiO 21-2 parts of thickening agent, 4-10 parts of inorganic thickening agent, 0.5 part of nano C powder and 120-170 parts of deionized water, wherein the preparation method of the inorganic phase change material comprises the following specific steps:
the method comprises the following steps: placing 80-100 parts of water at 52-60 deg.C into a preparation vessel, slowly adding sodium sulfate decahydrate, stirring, and standing at constant temperature of 52-60 deg.C for 20-30 min to obtain solution A;
step two: sequentially putting potassium chloride, ammonium chloride, sodium nitrate and borax into a preparation dish, adding 30-50 parts of deionized water for dissolving, fully and uniformly mixing to obtain a solution B, slowly adding the solution B into the solution A, and continuously and uniformly stirring to obtain a solution C;
step three: putting 10-20 parts of water into a preparation dish, sequentially adding the nano SiO2, the nano C powder, the thickening agent and the inorganic thickening agent into the preparation dish, and fully and uniformly stirring to obtain a solution D;
step four: and slowly adding the solution D into the solution C, uniformly stirring at the temperature of 70-90 ℃, keeping the constant temperature for 30-40 min, and naturally cooling to room temperature to obtain the inorganic phase change material.
Specifically, the phase change temperature of the inorganic phase change material is 5 ℃, the supercooling degree is 1.5 ℃, and the phase change latent heat is 146.5 KJ/KG.
Comparative example 1
An inorganic phase-change material with a phase-change temperature of 5 ℃ and a preparation method thereof, wherein the inorganic phase-change material comprises the following components in parts by weight: 60-80 parts of sodium sulfate decahydrate, 12-25 parts of potassium chloride, 10-15 parts of ammonium chloride, 3-5 parts of sodium nitrate, 3-5 parts of borax, 11-15 parts of nano SiO 21-2 parts of thickening agent, 4-10 parts of inorganic thickening agent, 0.5 part of nano C powder and 120-170 parts of deionized water, wherein the preparation method of the inorganic phase change material comprises the following specific steps:
the method comprises the following steps: placing 80-100 parts of water at 52-60 deg.C into a preparation vessel, slowly adding sodium sulfate decahydrate, stirring, and standing at constant temperature of 52-60 deg.C for 20-30 min to obtain solution A;
step two: sequentially putting potassium chloride, ammonium chloride, sodium nitrate and borax into a preparation dish, adding 30-50 parts of deionized water for dissolving, fully and uniformly mixing to obtain a solution B, slowly adding the solution B into the solution A, and continuously and uniformly stirring to obtain a solution C;
step three: putting 10-20 parts of water into a preparation dish, sequentially adding the nano SiO2, the nano C powder, the thickening agent and the inorganic thickening agent into the preparation dish, and fully and uniformly stirring to obtain a solution D;
step four: and slowly adding the solution D into the solution C, uniformly stirring at the temperature of 70-90 ℃, keeping the constant temperature for 30-40 min, and naturally cooling to room temperature to obtain the inorganic phase change material.
Specifically, the phase change temperature of the inorganic phase change material is 5 ℃, the supercooling degree is 1.5 ℃, and the phase change latent heat is 146.5 KJ/KG.
Comparative example 2
An inorganic phase-change material with a phase-change temperature of 5 ℃ and a preparation method thereof, wherein the inorganic phase-change material comprises the following components in parts by weight: 60-80 parts of sodium sulfate decahydrate, 12-25 parts of potassium chloride, 10-15 parts of ammonium chloride, 3-5 parts of sodium nitrate, 3-5 parts of borax, 11-15 parts of nano SiO 21-2 parts of thickening agent, 4-10 parts of inorganic thickening agent, 0.5 part of nano C powder and 120-170 parts of deionized water, wherein the preparation method of the inorganic phase change material comprises the following specific steps:
the method comprises the following steps: placing 80-100 parts of water at 52-60 deg.C into a preparation vessel, slowly adding sodium sulfate decahydrate, stirring, and standing at constant temperature of 52-60 deg.C for 20-30 min to obtain solution A;
step two: sequentially putting potassium chloride, ammonium chloride, sodium nitrate and borax into a preparation dish, adding 30-50 parts of deionized water for dissolving, fully and uniformly mixing to obtain a solution B, slowly adding the solution B into the solution A, and continuously and uniformly stirring to obtain a solution C;
step three: putting 10-20 parts of water into a preparation dish, sequentially adding the nano SiO2, the nano C powder, the thickening agent and the inorganic thickening agent into the preparation dish, and fully and uniformly stirring to obtain a solution D;
step four: and slowly adding the solution D into the solution C, uniformly stirring at the temperature of 70-90 ℃, keeping the constant temperature for 30-40 min, and naturally cooling to room temperature to obtain the inorganic phase change material.
Specifically, the phase change temperature of the inorganic phase change material is 5 ℃, the supercooling degree is 1.5 ℃, and the phase change latent heat is 146.5 KJ/KG.
Comparative example 3
Inorganic phase-change materials sold by other companies are adopted, the obtained supercooling degree is 1.5 ℃, and the phase-change latent heat is 146.5 KJ/KG.
As shown in fig. 2 and 3, recondensation refers to recondensation of the phase change material to start another energy absorption-release cycle, and the inorganic phase change material starts recondensation at 3.5 ℃, the condensation time is 7.5h, and is correspondingly shortened along with the reduction of the temperature, the condensation time at 3 ℃ is 6.5h, and the condensation time at 2 ℃ is 5 h.
When the environment temperature is 25 ℃, the temperature control capacity of the inorganic phase change material is inversely proportional to the time, the cold quantity released by the phase change material begins to decrease along with the increase of the time, the phase change material begins to release the cold quantity at 5 ℃, the temperature can be kept for 12 hours, and then the temperature is gradually increased until the phase change material is completely melted and is equal to the environment temperature.
Claims (4)
1. An inorganic phase-change material with a phase-change temperature of 5 ℃ and a preparation method thereof are characterized in that: the inorganic phase change material comprises the following components in parts by weight: 60-80 parts of sodium sulfate decahydrate, 12-25 parts of potassium chloride, 10-15 parts of ammonium chloride, 3-5 parts of sodium nitrate, 3-5 parts of borax and nano SiO2 1-2 parts of thickening agent, 11-15 parts of inorganic thickening agent, 4-10 parts of nano C powder and 120-170 parts of deionized water, wherein the preparation method of the inorganic phase-change material comprises the following specific steps:
the method comprises the following steps: placing 80-100 parts of water at 52-60 deg.C into a preparation vessel, slowly adding sodium sulfate decahydrate, stirring, and standing at constant temperature of 52-60 deg.C for 20-30 min to obtain solution A;
step two: sequentially putting potassium chloride, ammonium chloride, sodium nitrate and borax into a preparation dish, adding 30-50 parts of deionized water for dissolving, fully and uniformly mixing to obtain a solution B, slowly adding the solution B into the solution A, and continuously and uniformly stirring to obtain a solution C;
step three: taking 10-20 parts of water, putting the water into a preparation vessel, and adding nano SiO2Adding the nano C powder, the thickening agent and the inorganic thickening agent into a preparation vessel in sequence, and fully and uniformly stirring to obtain a solution D;
step four: and slowly adding the solution D into the solution C, uniformly stirring at the temperature of 70-90 ℃, keeping the constant temperature for 30-40 min, and naturally cooling to room temperature to obtain the inorganic phase change material.
2. The inorganic phase-change material with the phase-change temperature of 5 ℃ and the preparation method thereof as claimed in claim 1 are characterized in that: the thickening agent is one or a combination of more of carboxymethyl cellulose, hydroxypropyl methyl cellulose, hydroxyethyl cellulose, polyvinyl alcohol and polyvinylpyrrolidone.
3. The inorganic phase-change material with the phase-change temperature of 5 ℃ and the preparation method thereof as claimed in claim 1 are characterized in that: the inorganic thickener is one or a combination of more of diatomite, silica gel, sodium bentonite and attapulgite.
4. The inorganic phase-change material with the phase-change temperature of 5 ℃ and the preparation method thereof as claimed in claim 1 are characterized in that: the phase change temperature of the inorganic phase change material is 5 ℃, the supercooling degree is 1.5 ℃, and the phase change latent heat is 146.5 KJ/KG.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113214796A (en) * | 2021-04-12 | 2021-08-06 | 东南大学 | Composite inorganic salt phase change cold storage agent and preparation method thereof |
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| CN109181653A (en) * | 2018-10-09 | 2019-01-11 | 北京物资学院 | Cold-storage material and application for the fresh cold chain transportation of fruits and vegetables |
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| JPH08218063A (en) * | 1995-02-10 | 1996-08-27 | Asahi Denka Kogyo Kk | Latent heat-storing material composition |
| CN105038715A (en) * | 2015-06-23 | 2015-11-11 | 江南大学 | Hydrous salt cold storage agent with phase-transition temperature of 5-8 DEG C and preparation method thereof |
| CN107189765A (en) * | 2017-07-06 | 2017-09-22 | 贺迈新能源科技（上海）有限公司 | A kind of deepfreeze hydrous salt phase change material and its preparation method and application |
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| CN113214796A (en) * | 2021-04-12 | 2021-08-06 | 东南大学 | Composite inorganic salt phase change cold storage agent and preparation method thereof |
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