CN107418521B - Ternary phase change cold storage material and preparation method thereof - Google Patents
Ternary phase change cold storage material and preparation method thereof Download PDFInfo
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- CN107418521B CN107418521B CN201710569214.4A CN201710569214A CN107418521B CN 107418521 B CN107418521 B CN 107418521B CN 201710569214 A CN201710569214 A CN 201710569214A CN 107418521 B CN107418521 B CN 107418521B
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Abstract
The invention discloses a low-temperature ternary phase change cold storage material and a preparation method thereof, and the low-temperature phase change cold storage material to be protected by the invention comprises the following components in parts by weight: the method is simple in process, short in production period, low in cost, non-toxic, environment-friendly, small in supercooling degree and more than 200J/g of latent heat of phase change.
Description
Technical Field
The invention relates to the technical field of cold accumulation, in particular to a low-temperature phase change cold accumulation material with the phase change temperature of-20 ℃.
Background
With the rapid development of human society, the long-distance transportation of a large amount of frozen seafood meat, ice cream and local products in different places and the distribution requirements of small-batch, multi-variety, multi-frequency and short-time commodities are increasing day by day, so that the refrigeration transportation technology in the refrigeration chain is rapidly developed in recent years. The cold accumulation material is the key of the cold accumulation technology. The low-temperature cold storage material below 0 ℃ is mainly an inorganic salt aqueous solution and a material formed by compounding inorganic salt and organic matters. The former has the advantages of low phase-change temperature and large phase-change latent heat, but the cold storage capacity is restricted by the large supercooling degree and the serious phase separation, and the latter has certain influence on the environment or human body due to the existence of organic matters. At present, a lot of low-temperature composite phase change materials are used at home and abroad, but the phase change temperature of most of the formula is more than minus 20 ℃, so that the storage and transportation environment of about minus 10 ℃ to minus 15 ℃ can be provided, and the refrigeration requirements of frozen meat seafood, medicines and the like which are required to be lower than minus 15 ℃ are difficult to meet.
Patent CN201410555371.6 discloses a coolant prepared by using sodium chloride and glycerol as main energy storage additives, but because the raw materials of the coolant contain organic materials, the organic materials have certain volatility and flammability, and have certain influence on the environment and human body. For example, the patent application CN201310170576.8 and CN103242806A disclose an inorganic salt phase change cold storage material, which consists of 100 weight percent of inorganic salt solution with the concentration of 15-25%, 1-7 weight percent of crystal nucleus agent and 2-15 weight percent of thickening agent, the temperature is-21 ℃, but the latent heat is less than 200J/g, and the cold storage capacity is poor.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the low-temperature phase-change material which is small in supercooling degree, high in phase-change latent heat and environment-friendly.
In order to achieve the purpose, the invention adopts the following technical scheme:
a ternary phase change cold storage material comprises the following components in parts by weight: 16-23% of inorganic salt mixed solution, 1-4% of nucleating agent, 3-7% of inorganic nano thickening agent, 1-2% of sodium carbonate and the balance of water.
The preferable ternary phase change cold storage material is characterized in that the inorganic mixed solution is a mixed solution of sodium chloride and potassium chloride, wherein the sodium chloride content is 12-18%, the potassium chloride content is 3-7%, the nucleating agent is one or more of borax, silicon dioxide and NaF, the inorganic nano-thickener is composed of fumed silica and/or nano-attapulgite, and the water is purified water or distilled water.
The preferable ternary phase change cold storage material is characterized in that the inorganic salt mixed solution of the ternary phase change cold storage material is composed of sodium chloride and potassium chloride, the nucleating agent is composed of borax and diatomite, the inorganic nano-thickener is fumed silica, and the ratio of each component is as follows: 15% of sodium chloride, 4% of potassium chloride, 1.5% of sodium carbonate, 2% of borax, 0.5% of diatomite, 6% of fumed silica and the balance of distilled water.
The preferable ternary phase change cold storage material is characterized in that the inorganic salt mixed solution of the ternary phase change cold storage material is composed of sodium chloride and potassium chloride, the nucleating agent is composed of borax, the inorganic nano-thickener is composed of fumed silica and nano attapulgite, and the ratio of each component is as follows: 14 percent of sodium chloride, 7 percent of potassium chloride, 1.1 percent of sodium carbonate, 3 percent of borax, 3 percent of fumed silica, 3 percent of nano attapulgite and the balance of distilled water.
The phase change temperature of the ternary phase change cold storage material is-18 to-21 ℃, and the phase change latent heat is 220 to 280J/g.
The phase change temperature of the preferred ternary phase change cold storage material is-20 ℃.
The preparation method of the low-temperature phase change cold storage material comprises the following steps:
(1) preparing a 12-18% sodium chloride solution according to the mass ratio;
(2) adding 3-7% of potassium chloride solid and 1-2% of sodium carbonate solid into the sodium chloride solution according to the mass ratio, and stirring for dissolving;
(3) and (3) placing the mixed solution on a magnetic stirrer, setting the temperature at 20-30 ℃, rotating at the speed of 200-400 r/min, adding a nucleating agent, gradually adding an inorganic nano thickening agent until the addition is finished, and continuing stirring until the solution becomes a suspension to obtain the phase-change material.
The preparation method of the preferred phase change cold storage material comprises the following steps:
(1) preparing 15% sodium chloride solution according to the mass percentage, injecting purified water or distilled water into a stirring container, adding sodium chloride, and fully stirring to dissolve the sodium chloride to obtain 15% sodium chloride solution;
(2) adding 4% of potassium chloride solid and 1.5% of sodium carbonate solid according to the mass percentage: injecting a sodium chloride solution into a stirring container, adding potassium chloride and sodium carbonate solids, and uniformly stirring;
(3) and (3) stirring the mixed solution obtained in the step (2) by using a magnetic stirrer, setting the temperature of the stirrer to be 30 ℃, setting the rotating speed to be 300r/min, adding the nucleating agent firstly, then gradually adding the inorganic nano thickening agent until the inorganic nano thickening agent is completely added, and continuing stirring until the solution becomes viscous suspension to obtain the low-temperature cold storage phase change material.
The preparation method of the preferred phase change cold storage material comprises the following steps:
(1) preparing a 14% sodium chloride solution according to the mass percentage: injecting purified water or distilled water into a stirring container, adding sodium chloride, and fully stirring to dissolve the sodium chloride to obtain a 14% sodium chloride solution;
(2) adding 7% of potassium chloride solid and 1.1% of sodium carbonate solid according to mass percentage: injecting a sodium chloride solution into a stirring container, adding potassium chloride and sodium carbonate solids, and uniformly stirring;
(3) and (3) stirring the mixed solution obtained in the step (2) by using a magnetic stirrer, setting the temperature of the stirrer to be 30 ℃, setting the rotating speed to be 400r/min, adding the nucleating agent firstly, then gradually adding the inorganic nano thickening agent until the inorganic nano thickening agent is completely added, and continuing stirring until the solution becomes viscous suspension to obtain the low-temperature phase change cold storage material.
Drawings
FIG. 1: DSC profile of inventive example 1;
FIG. 2: the step profile of inventive example 1;
FIG. 3: DSC profile of inventive example 2;
Detailed Description
The present invention will now be described in further detail with reference to examples.
Example 1: in this embodiment, the ternary phase change cold storage material is composed of, by mass:
15% of sodium chloride, 4% of potassium chloride, 1.5% of sodium carbonate, 2% of borax, 0.5% of diatomite, 6% of inorganic nano-thickening agent and the balance of water. Wherein the water can be purified water or distilled water, and the inorganic nano-thickener is fumed silica.
The preparation method of the ternary phase change cold storage material comprises the following steps:
1. preparing 15% sodium chloride solution according to the mass percentage: injecting purified water or distilled water into a stirring container, adding sodium chloride, and fully stirring to dissolve the sodium chloride to obtain a 15% sodium chloride solution;
2. adding 4% of potassium chloride solid and 1.5% of sodium carbonate solid according to the mass percentage: injecting a sodium chloride solution into a stirring container, adding potassium chloride and sodium carbonate solids, and uniformly stirring;
3. and (3) stirring the mixed solution obtained in the step (2) by using a magnetic stirrer, setting the temperature of the stirrer to be 30 ℃, setting the rotating speed to be 300r/min, firstly adding borax and diatomite, then gradually adding white carbon black until all the borax and the diatomite are added, and continuously stirring until the solution becomes viscous suspension to obtain the low-temperature phase change cold storage material.
The results are shown in the attached figure 1: the phase change temperature of the cold accumulation phase change material is-18.67 ℃, and the phase change latent heat is 234.528J/g.
Example 2: in this embodiment, the ternary phase change cold storage material is composed of, by mass:
14% of sodium chloride, 7% of potassium chloride, 1.1% of sodium carbonate, 3% of borax, 6% of inorganic nano-thickener and the balance of water. Wherein the water can be purified water or distilled water, and the inorganic nano-thickener is a mixture of fumed silica and nano attapulgite, and each of the inorganic nano-thickener accounts for 3 percent.
The preparation method of the phase change cold storage material comprises the following steps:
1. preparing a 14% sodium chloride solution according to the mass percentage: injecting purified water or distilled water into a stirring container, adding sodium chloride, and fully stirring to dissolve the sodium chloride to obtain a 14% sodium chloride solution;
2. adding 7% of potassium chloride solid and 1.1% of sodium carbonate solid according to mass percentage: injecting a sodium chloride solution into a stirring container, adding potassium chloride and sodium carbonate solids, and uniformly stirring;
3. and (3) stirring the mixed solution obtained in the step (2) by using a magnetic stirrer, setting the temperature of the stirrer to be 30 ℃, adding borax at a rotating speed of 400r/min, gradually adding white carbon black until all the borax is added, and continuously stirring until the solution becomes viscous suspension to obtain the low-temperature phase change cold storage material.
The results are shown in FIG. 3: the phase change temperature of the cold accumulation phase change material is-20.643 ℃, and the phase change latent heat is 260.511J/g.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention.
Claims (8)
1. A ternary phase change cold storage material is characterized in that: the ternary phase change cold storage material comprises the following components in parts by weight: the composite material comprises 16-23% of inorganic salt mixed solution, 1-4% of nucleating agent, 3-7% of inorganic nano thickener, 1-2% of sodium carbonate and the balance of water, wherein the inorganic mixed solution is mixed solution of sodium chloride and potassium chloride, the sodium chloride content is 12-18%, the potassium chloride content is 3-7%, the nucleating agent is composed of one or more of borax, silicon dioxide and NaF or composed of borax and diatomite, the inorganic nano thickener is composed of fumed silica and/or nano concave-convex rods, and the water is purified water or distilled water.
2. The ternary phase-change cold storage material according to claim 1, wherein: the ternary phase change cold storage material is characterized in that the inorganic salt mixed solution is composed of sodium chloride and potassium chloride, the nucleating agent is composed of borax and diatomite, the inorganic nano-thickener is fumed silica, and the ratio of each component is as follows: 15% of sodium chloride, 4% of potassium chloride, 1.5% of sodium carbonate, 2% of borax, 0.5% of diatomite, 6% of fumed silica and the balance of distilled water.
3. The ternary phase-change cold storage material according to claim 1, wherein: the inorganic salt mixed solution of the ternary phase change cold storage material is composed of sodium chloride and potassium chloride, the nucleating agent is composed of borax, the inorganic nano-thickener is composed of fumed silica and nano attapulgite, and the ratio of each component is as follows: 14 percent of sodium chloride, 7 percent of potassium chloride, 1.1 percent of sodium carbonate, 3 percent of borax, 3 percent of fumed silica, 3 percent of nano attapulgite and the balance of distilled water.
4. The ternary phase change cold storage material according to any one of claims 1 to 3, wherein: the phase change material has the phase change temperature of-18 to-21 ℃ and the phase change latent heat of 220 to 280J/g.
5. The ternary phase-change cold storage material according to claim 4, wherein: the phase change temperature of the phase change material is-20 ℃.
6. The method for preparing the phase change cold storage material according to any one of claims 1 to 3, comprising the following steps:
(1) preparing a 12-18% sodium chloride solution according to the mass ratio;
(2) adding 3-7% of potassium chloride solid and 1-2% of sodium carbonate solid into the sodium chloride solution according to the mass ratio, and stirring for dissolving;
(3) and (3) placing the mixed solution on a magnetic stirrer, setting the temperature at 20-30 ℃, rotating at the speed of 200-400 r/min, adding a nucleating agent, gradually adding an inorganic nano thickening agent until the addition is finished, and continuing stirring until the solution becomes a suspension to obtain the phase-change material.
7. The method for preparing the phase change cold storage material according to claim 6, comprising the following steps:
(1) preparing 15% sodium chloride solution according to the mass percentage, injecting purified water or distilled water into a stirring container, adding sodium chloride, and fully stirring to dissolve the sodium chloride to obtain 15% sodium chloride solution;
(2) adding 4% of potassium chloride solid and 1.5% of sodium carbonate solid according to the mass percentage: injecting a sodium chloride solution into a stirring container, adding potassium chloride and sodium carbonate solids, and uniformly stirring;
(3) and (3) stirring the mixed solution obtained in the step (2) by using a magnetic stirrer, setting the temperature of the stirrer to be 30 ℃, setting the rotating speed to be 300r/min, adding the nucleating agent firstly, then gradually adding the inorganic nano thickening agent until the inorganic nano thickening agent is completely added, and continuing stirring until the solution becomes viscous suspension to obtain the low-temperature phase change cold storage material.
8. The method for preparing the phase change cold storage material according to claim 6, comprising the following steps:
(1) preparing a 14% sodium chloride solution according to the mass percentage: injecting purified water or distilled water into a stirring container, adding sodium chloride, and fully stirring to dissolve the sodium chloride to obtain a 14% sodium chloride solution;
(2) adding 7% of potassium chloride solid and 1.1% of sodium carbonate solid according to mass percentage: injecting a sodium chloride solution into a stirring container, adding potassium chloride and sodium carbonate solids, and uniformly stirring;
(3) and (3) stirring the mixed solution obtained in the step (2) by using a magnetic stirrer, setting the temperature of the stirrer to be 30 ℃, setting the rotating speed to be 400r/min, adding the nucleating agent firstly, then gradually adding the inorganic nano thickening agent until the inorganic nano thickening agent is completely added, and continuing stirring until the solution becomes viscous suspension to obtain the low-temperature phase change cold storage material.
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| CN108504335A (en) * | 2018-05-18 | 2018-09-07 | 东莞市兆荣节能科技有限公司 | A kind of phase-change material and its processing technology for air-conditioning |
| CN109504352A (en) * | 2018-12-29 | 2019-03-22 | 北京华厚能源科技有限公司 | 8 ~ 10 DEG C of composite phase change energy-storing cool storage materials of one kind and preparation method thereof |
| CN109868115A (en) * | 2019-03-12 | 2019-06-11 | 上海安鲜达物流科技有限公司 | A kind of fresh cold chain efficient cold-storage material and preparation method thereof |
| CN111748321A (en) * | 2019-03-28 | 2020-10-09 | 深圳市爱能森科技有限公司 | Low-temperature phase change cold storage material and preparation method thereof |
| CN113185952B (en) * | 2020-01-24 | 2022-05-13 | 纯钧新材料(深圳)有限公司 | Inorganic phase change materials as coolants |
| CN113667460A (en) * | 2021-09-24 | 2021-11-19 | 北京火狐星云数字科技有限公司 | Inorganic phase-change material and preparation method thereof |
| CN114163978A (en) * | 2021-11-01 | 2022-03-11 | 安徽墙煌彩铝科技有限公司 | Intelligent temperature-regulating material for building |
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| RU2488620C1 (en) * | 2011-12-16 | 2013-07-27 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Кубанский государственный технологический университет" (ФГБОУ ВПО "КубГТУ") | Cold-accumulating material |
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