Gel phase-change material as well as preparation method and application method thereof

Abstract

The invention discloses a gel phase-change material. The gel phase-change material is prepared from components in percentage by mass as follows: 35%-39% of sodium sulfate, 2.8%-8.5% of sodium chloride, 0.5%-2.5% of ammonium chloride, 2.5%-4% of a thickening agent, 3.0%-3.3% of borax, 0.1%-0.2% of a crystal form changing agent, 1%-1.8% of white carbon black and the balance of pure water. The gel phase-change material is adjustable at the temperature of 15-25 DEG C, is non-toxic, odorless, non-corrosive and gelatinous and has shape plasticity, the problems of supercooling, phase separation and liquid phase leakage of a traditional aqueous phase-change material are solved, furthermore, the gel phase-change material is higher in latent heat of phase change, long in cold insulation time and lowin cost, adopts a simple preparation process and can be widely applied to cold-chain transportation of products such as red wine, chocolate and the like at the storage and transportation temperatureof 15-25 DEG C.

Description

technical field

[0001] The invention relates to the field of cold chain transportation, in particular to a gel phase change material, a preparation method and an application method thereof. Background technique

[0002] At present, the application of cold storage technology is mostly concentrated in the fields of air conditioning and cold storage. However, with the rapid development of the national economy and the improvement of people's living standards, consumers' demand for fresh, high-quality and frozen processed food is increasing. In the process of cold chain transportation, phase change materials with appropriate temperature are needed to cool and keep the products fresh, so as to extend the shelf life of the products and reduce the loss before consumption. Due to the requirements of the biomedical industry for the transport temperature of 2-8 °C, the phase change materials with a phase transition temperature in the range of 2-8 °C have developed rapidly, while for pr...

Examples

Embodiment 1

[0053] The gel phase change material in this embodiment includes the following components in terms of mass percentage: 36.61% sodium sulfate; 7.40% sodium chloride; 1.85% ammonium chloride; 2.77% thickener; 3.24% borax; agent 0.14%; white carbon black 1.39%; pure water 46.60% (resistivity at 25°C is 10MΩ·cm). Wherein, the thickener includes sodium polyacrylate; the crystal form changing agent includes sodium hexametaphosphate.

[0054] The preparation method of the above-mentioned gel phase change material comprises the following steps:

[0055] S1, take by weighing 198g sodium sulfate, 40g sodium chloride, 10g ammonium chloride, 15g sodium polyacrylate, 17.5g borax, 0.75g sodium hexametaphosphate, 7.5g white carbon black standby; Wherein, described sodium chloride and chlorine The mass ratio of ammonium chloride is preferably 4:1;

[0056] S2. Weigh 252g of pure water, and divide the water into two parts: 200g and 52g; it should be noted that the weighted amounts of the abo...

Embodiment 2

[0070] The only difference between this example and Example 1 is that the gel phase change material in this example includes the following components in terms of mass percentage: 36.28% sodium sulfate; 7.33% sodium chloride; 1.83% ammonium chloride Thickener 3.66%; Borax 3.21%; Crystal form changing agent 0.13%; White carbon black 1.37%; Wherein, the thickener includes sodium carboxymethylcellulose; and the crystal form changing agent includes sodium hexametaphosphate.

[0071] The preparation method of the above-mentioned gel phase change material comprises the following steps:

[0072] S1, take by weighing 196g sodium sulfate, 40g sodium chloride, 10g ammonium chloride, 20g sodium carboxymethylcellulose, 17.3g borax, 0.7g sodium hexametaphosphate, 7.4g white carbon black for subsequent use;

[0073] S2, take by weighing 249g pure water, and this moisture is divided into 200g (accounting for 80.3% of the total weight of pure water) and 49g two parts;

[0074] S3, 200g of pu...

Embodiment 3

[0081] The only difference between this example and Example 1 is that the gel phase change material in this example includes the following components in terms of mass percentage: 36.23% sodium sulfate; 8.12% sodium chloride; 2.03% ammonium chloride Thickener 2.77%; Borax 3.23%; Crystal form changing agent 0.14%; White carbon black 1.57%; Wherein, the thickener includes sodium carboxymethyl cellulose; the crystal form changing agent includes a mixture of sodium hexametaphosphate and sodium tripolyphosphate.

[0082] The preparation method of the above-mentioned gel phase change material comprises the following steps:

[0083] S1, take by weighing 196g sodium sulfate, 44g sodium chloride, 11g ammonium chloride, 15g sodium carboxymethylcellulose, 17.4g borax, 0.76g the mixture of sodium hexametaphosphate and sodium tripolyphosphate, 8.5g white carbon black standby ;

[0084] S2, take by weighing 248g pure water, and this moisture is divided into 200g (accounting for 80.6% of pu...

technical field

[0001] The invention relates to the field of cold chain transportation, in particular to a gel phase change material, a preparation method and an application method thereof. Background technique

[0002] At present, the application of cold storage technology is mostly concentrated in the fields of air conditioning and cold storage. However, with the rapid development of the national economy and the improvement of people's living standards, consumers' demand for fresh, high-quality and frozen processed food is increasing. In the process of cold chain transportation, phase change materials with appropriate temperature are needed to cool and keep the products fresh, so as to extend the shelf life of the products and reduce the loss before consumption. Due to the requirements of the biomedical industry for the transport temperature of 2-8 °C, the phase change materials with a phase transition temperature in the range of 2-8 °C have developed rapidly, while for pr...

Examples

Embodiment 1

[0053] The gel phase change material in this embodiment includes the following components in terms of mass percentage: 36.61% sodium sulfate; 7.40% sodium chloride; 1.85% ammonium chloride; 2.77% thickener; 3.24% borax; agent 0.14%; white carbon black 1.39%; pure water 46.60% (resistivity at 25°C is 10MΩ·cm). Wherein, the thickener includes sodium polyacrylate; the crystal form changing agent includes sodium hexametaphosphate.

[0054] The preparation method of the above-mentioned gel phase change material comprises the following steps:

[0055] S1, take by weighing 198g sodium sulfate, 40g sodium chloride, 10g ammonium chloride, 15g sodium polyacrylate, 17.5g borax, 0.75g sodium hexametaphosphate, 7.5g white carbon black standby; Wherein, described sodium chloride and chlorine The mass ratio of ammonium chloride is preferably 4:1;

[0056] S2. Weigh 252g of pure water, and divide the water into two parts: 200g and 52g; it should be noted that the weighted amounts of the abo...

Embodiment 2

[0070] The only difference between this example and Example 1 is that the gel phase change material in this example includes the following components in terms of mass percentage: 36.28% sodium sulfate; 7.33% sodium chloride; 1.83% ammonium chloride Thickener 3.66%; Borax 3.21%; Crystal form changing agent 0.13%; White carbon black 1.37%; Wherein, the thickener includes sodium carboxymethylcellulose; and the crystal form changing agent includes sodium hexametaphosphate.

[0071] The preparation method of the above-mentioned gel phase change material comprises the following steps:

[0072] S1, take by weighing 196g sodium sulfate, 40g sodium chloride, 10g ammonium chloride, 20g sodium carboxymethylcellulose, 17.3g borax, 0.7g sodium hexametaphosphate, 7.4g white carbon black for subsequent use;

[0073] S2, take by weighing 249g pure water, and this moisture is divided into 200g (accounting for 80.3% of the total weight of pure water) and 49g two parts;

[0074] S3, 200g of pu...

Embodiment 3

[0081] The only difference between this example and Example 1 is that the gel phase change material in this example includes the following components in terms of mass percentage: 36.23% sodium sulfate; 8.12% sodium chloride; 2.03% ammonium chloride Thickener 2.77%; Borax 3.23%; Crystal form changing agent 0.14%; White carbon black 1.57%; Wherein, the thickener includes sodium carboxymethyl cellulose; the crystal form changing agent includes a mixture of sodium hexametaphosphate and sodium tripolyphosphate.

[0082] The preparation method of the above-mentioned gel phase change material comprises the following steps:

[0083] S1, take by weighing 196g sodium sulfate, 44g sodium chloride, 11g ammonium chloride, 15g sodium carboxymethylcellulose, 17.4g borax, 0.76g the mixture of sodium hexametaphosphate and sodium tripolyphosphate, 8.5g white carbon black standby ;

[0084] S2, take by weighing 248g pure water, and this moisture is divided into 200g (accounting for 80.6% of pu...

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