Organic-inorganic hybrid cold storage brine nanocapsule and preparation method thereof

Abstract

The invention discloses an organic-inorganic hybrid cold storage brine nanocapsule and a preparation method thereof. Firstly, organic-inorganic hybrid cold storage brine is formed through interaction of ion dipoles, hydrogen bonds cooperate with self-assembly, and the cold storage brine nano-cluster is prepared. And then preparing the organic-inorganic hybrid cold storage brine nano-cluster through hydrogen bond synergistic self-assembly. Then adopting static electricity to enable the inorganic nanowires to adsorb and wrap the phase change main body, and constructing the radial heat conduction reinforced organic-inorganic hybrid cold storage brine nanocluster through static electricity induced self-assembly. And finally, preparing the organic-inorganic hybrid cold storage brine nanocapsule through in-situ electrostatic wrapping. The preparation process is simple, and the prepared material has the advantages of high enthalpy value, high thermal conductivity, high strength, good shape stability and cycling stability, environmental friendliness and the like.

Description

Technical Field

[0001] The invention relates to the technical field of cold storage gel materials, and in particular to an organic-inorganic hybrid cold storage salt water nano capsule and a preparation method thereof. Background Art

[0002] Cold storage and refrigerated truck transportation in cold chain logistics consume a lot of electricity and energy, which not only increases costs but also greatly increases carbon emissions. In addition, during the transportation from cold storage to consumers, the problem of "breaking the cold chain" still exists due to the lack of cold storage facilities, which also raises some related health and safety issues. Today, as fossil energy is gradually depleting, how to ensure the popularity of cold chain transportation and storage while taking into account the efficient use of costs and energy is an urgent problem to be solved.

[0003] Cold storage materials are mainly divided into phase change cold storage materials and non-phase change cold storage materials. The current mainstream phase change cold storage materials have disadvantages such as low phase change latent heat, easy leakage, poor thermal conductivity, and high price. Non-phase change cold storage materials have disadvantages such as difficult preparation, high pollution, and poor recyclability. Under this premise, it is very important to find green, environmentally friendly, high energy density, and good stability cold storage materials. Summary of the invention

[0004] One of the purposes of the present invention is to provide a method for preparing organic-inorganic hybrid cold-storage salt water nanocapsules, which is simple to prepare and easy to operate.

[0005] The second object of the present invention is to provide an organic-inorganic hybrid cold storage brine nanocapsule prepared by the above preparation method, which has the advantages of high enthalpy value, high thermal conductivity, not easy to leak, good cycle stability, and green environmental protection.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] In a first aspect, the present invention provides a method for preparing organic-inorganic hybrid cold storage salt water nanocapsules, comprising the following steps:

[0008] Step 1: Forming organic-inorganic hybrid cold storage brine through ion-dipole interaction: Under the conditions of 1 MPa and 30° C., based on the cation-dipole interaction and anion-dipole interaction between polar organic matter and inorganic salts, a highly stable multi-organic hybrid cold storage brine is formed; the polar organic matter is selected from one or more of lysine-aspartic acid, threonine, and isoleucine; the inorganic salt is selected from one or more of potassium aluminum sulfate dodecahydrate, ammonium aluminum sulfate dodecahydrate, and sodium aluminum sulfate dodecahydrate;

[0009] Step 2: preparing organic-inorganic hybrid cold storage brine nanoclusters through hydrogen bond cooperative self-assembly: activating the organic-inorganic hybrid cold storage brine prepared in step 1 with an alternating magnetic field at 80° C., and then adding biomass amphiphilic small molecules to prepare organic-inorganic hybrid cold storage brine nanoclusters; the biomass amphiphilic small molecules are selected from one or more of trehalose lipids, sophorolipids, mannoerythritol lipids, and lichenin;

[0010] Step 3: constructing radially thermally conductive enhanced organic-inorganic hybrid cold storage brine nanoclusters through electrostatically induced self-assembly: in the organic-inorganic hybrid cold storage brine nanoclusters prepared in step 2, the charged boron nitride nanowire thermal conductive filler is evenly dispersed through electrostatic induction to form nano-oriented organic-inorganic hybrid cold storage brine nanoclusters, and after aging, radially thermally conductive enhanced organic-inorganic hybrid cold storage brine nanoclusters are obtained;

[0011] Step 4: Preparation of organic-inorganic hybrid cold storage brine nanocapsules by in-situ electrostatic encapsulation: at 80°C, add a biomass amphiphilic polymer with piezoelectric properties to the radially thermally conductive enhanced organic-inorganic hybrid cold storage brine nanoclusters prepared in step 3, and prepare organic-inorganic hybrid cold storage brine nanocapsules based on the electrostatic interaction between the two; the biomass amphiphilic polymer is selected from one or more of glycine-modified polysulfobetaine, glycine-modified polycarboxybetaine, glycine-modified polyphosphorylcholine, and glycine-modified polyglutamic acid.

[0012] Preferably, the percentage content of the polar organic matter, inorganic salt and water in step 1 is in the range of (0.5%:0.5%:99%) to (20%:20%:60%).

[0013] Preferably, the content of the biomass amphiphilic small molecules in step 2 is 0.5% to 10% of the content of the organic-inorganic hybrid cold-storage brine nanocapsules.

[0014] Preferably, the intensity of the alternating magnetic field in step 2 is 40mT to 300mT, and the frequency is 10Hz to 80Hz.

[0015] Preferably, the boron nitride nanowire thermal conductive filler in step 3 is selected from one or more of hydroxylated boron nitride nanowires, carboxylated boron nitride nanowires, and quaternized boron nitride nanowires, and the content of the boron nitride nanowire thermal conductive filler is 0.5% to 10% of the content of the organic-inorganic hybrid cold storage brine nanocapsule.

[0016] Preferably, the aging temperature in step 3 is 20-30° C., and the aging time is 5-6 hours.

[0017] Preferably, the content of the biomass amphoteric polymer in step 4 is 0.5% to 10% of the content of the organic-inorganic hybrid cold-storage brine nanocapsule.

[0018] On the other hand, the present invention also provides organic-inorganic hybrid cold-storage salt water nanocapsules prepared by the above preparation method.

[0019] The organic-inorganic hybrid cold-storage salt water nanocapsules prepared by the present invention have high enthalpy and high thermal conductivity, and after 100 cycles, the enthalpy and thermal conductivity can be basically unchanged, and the mass retention rate is close to 99%, reflecting good cycle stability and shape stability.

[0020] Compared with traditional cold storage materials, the present invention has the following beneficial effects:

[0021] (1) The organic-inorganic hybrid cold-storage brine nanocapsules prepared by the present invention can store a large amount of cold, and their cold storage density is much higher than that of traditional phase change materials such as ice or inorganic salt solutions. This is because the selected polar organic matter and inorganic salt have high enthalpy values, and the cation-dipole effect and anion-dipole effect are used to form a highly stable multi-organic hybrid cold-storage brine. The added biomass amphiphilic polymer component can well wrap the cold-storage brine nanoclusters through in-situ electrostatic energy, achieve leakage prevention of the phase change material, highlight good shape stability and cycle stability, and give the material flexible characteristics to avoid brittle fracture.

[0022] (2) The thermally conductive filler selected by the present invention is an inorganic nanowire, which forms a thermal conductive channel that effectively improves the thermal conductivity of the phase change material and accelerates the cooling speed of the material. It also uses valley electricity to store cold, avoids the use of flat and peak electricity, saves energy, and reduces carbon emissions and costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The diagram shows the preparation process of organic-inorganic hybrid cold-storage salt water nanocapsules;

[0024] Figure 2 This is a scanning electron micrograph of the gel prepared in Example 1;

[0025] Figure 3 This is a scanning electron micrograph of the gel prepared in Example 2;

[0026] Figure 4 This is a scanning electron micrograph of the gel prepared in Example 3;

[0027] Figure 5 This is a scanning electron micrograph of the gel prepared in Example 4;

[0028] Figure 6 This is a scanning electron micrograph of the gel prepared in Example 5;

[0029] Figure 7 This is a scanning electron micrograph of the gel prepared in Example 6;

[0030] Figure 8 This is a scanning electron micrograph of the gel prepared in Example 5;

[0031] Fig. 9 This is a physical picture of the gel prepared in Example 1;

[0032] Fig.10 This is a physical picture of the gel prepared in Example 2;

[0033] Fig.11 This is a physical picture of the gel prepared in Example 3;

[0034] Fig.12 This is a physical picture of the gel prepared in Example 4;

[0035] Fig.13 This is a physical picture of the gel prepared in Example 5;

[0036] Fig.14 This is a physical picture of the gel prepared in Example 6;

[0037] Fig.15 This is a physical picture of the gel prepared in Example 7. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Example 1

[0040] Step 1: weigh 2g of lysine-aspartic acid, 2g of potassium aluminum sulfate dodecahydrate and 6g of deionized water into a reagent bottle, mix and stir under constant temperature conditions of 1MPa and 30°C, and form a highly stable multi-organic hybrid cold storage brine based on the cation-dipole effect and anion-dipole effect between polar organic matter and inorganic salts;

[0041] Step 2: under a constant temperature of 80° C., 1.43 g of trehalose lipid is added to the organic-inorganic hybrid cold storage brine prepared in step 1, and an alternating magnetic field with an intensity of 180 mT and a frequency of 50 Hz is used to activate the organic-inorganic hybrid cold storage brine to prepare organic-inorganic hybrid cold storage brine nanoclusters;

[0042] Step 3: Weigh 1.43g of hydroxylated boron nitride nanowires, add them to the organic-inorganic hybrid cold storage brine nanoclusters prepared in step 2, and adsorb and wrap the boron nitride nanowires on the surface of the cold storage brine nanoclusters through electrostatic induction, and disperse them evenly to form nano-oriented organic-inorganic hybrid cold storage brine nanoclusters; ripen at 1MPa and 25°C for 6h to obtain radially thermally conductive enhanced organic-inorganic hybrid cold storage brine nanoclusters;

[0043] Step 4: Under a constant temperature of 80°C, 1.43 g of polysulfobetaine modified with glycine was added to the radially thermally conductive enhanced organic-inorganic hybrid cold storage brine nanoclusters prepared in step 3, and organic-inorganic hybrid cold storage brine nanocapsules were prepared based on the electrostatic interaction between the two.

[0044] Figure 2 This is a scanning electron micrograph of the gel prepared in Example 1;

[0045] Fig. 9 This is a photo of the gel prepared in Example 1, showing a stable gel structure with triangular edges and a square shape.

[0046] Example 2

[0047] Step 1: weigh 0.5 g of threonine, 0.5 g of potassium aluminum sulfate dodecahydrate and 9 g of deionized water into a reagent bottle, mix and stir under a constant temperature of 1 MPa and 30° C., and form a highly stable multivariate organic-inorganic hybrid cold storage brine based on the cation-dipole effect and anion-dipole effect between polar organic matter and inorganic salts;

[0048] Step 2: Under a constant temperature of 80° C., 0.59 g of sophorolipid was added to the organic-inorganic hybrid cold storage brine prepared in step 1, and an alternating magnetic field with an intensity of 180 mT and a frequency of 50 Hz was used to activate the organic-inorganic hybrid cold storage brine to obtain organic-inorganic hybrid cold storage brine nanoclusters;

[0049] Step 3: Weigh 0.59 g of hydroxylated boron nitride nanowires, add them to the organic-inorganic hybrid cold storage brine nanoclusters prepared in step 2, and adsorb and wrap the boron nitride nanowires on the surface of the organic-inorganic hybrid cold storage brine nanoclusters through electrostatic induction, disperse them evenly, and form nano-oriented cold storage brine nanoclusters, and ripen them at 1 MPa and 25° C. for 6 hours to obtain radially thermally conductive enhanced organic-inorganic hybrid cold storage brine nanoclusters;

[0050] Step 4: Under a constant temperature of 80°C, add 0.59 g of glycine-modified polysulfobetaine to the radially thermally conductive enhanced organic-inorganic hybrid cold storage brine nanoclusters prepared in step 3, and prepare organic-inorganic hybrid cold storage brine nanocapsules based on the electrostatic interaction between the two.

[0051] Figure 3 This is a scanning electron micrograph of the gel prepared in Example 2;

[0052] Fig.10 This is a photo of the gel prepared in Example 2, showing a cubic and stable gel structure.

[0053] Example 3

[0054] Step 1: Weigh 1.2 g of threonine, 1.5 g of ammonium aluminum sulfate dodecahydrate and 10 g of deionized water into a reagent bottle, mix and stir under a constant temperature of 1 MPa and 30° C., and form a highly stable multivariate organic-inorganic hybrid cold storage brine based on the cation-dipole effect and anion-dipole effect between polar organic matter and inorganic salts;

[0055] Step 2: under a constant temperature of 80° C., 0.8 g of lichenin was added to the organic-inorganic hybrid cold storage brine prepared in step 1, and an alternating magnetic field with an intensity of 180 mT and a frequency of 50 Hz was used to activate the organic-inorganic hybrid cold storage brine to prepare organic-inorganic hybrid cold storage brine nanoclusters;

[0056] Step 3: Weigh 1 g of hydroxylated boron nitride nanowires, add them to the organic-inorganic hybrid cold storage brine nanoclusters prepared in step 2, and adsorb and wrap the boron nitride nanowires on the surface of the organic-inorganic hybrid cold storage brine nanoclusters through electrostatic induction, disperse them evenly, and form nano-oriented organic-inorganic hybrid cold storage brine nanoclusters, and ripen them at 1 MPa and 25° C. for 6 hours to obtain radially thermally conductive enhanced cold storage brine nanoclusters;

[0057] Step 4: Under a constant temperature of 80°C, add 0.7 g of glycine-modified polysulfobetaine to the radially thermally conductive enhanced organic-inorganic hybrid cold storage brine nanoclusters prepared in step 3, and prepare organic-inorganic hybrid cold storage brine nanocapsules based on the electrostatic interaction between the two.

[0058] Figure 4 This is a scanning electron micrograph of the gel prepared in Example 3;

[0059] Fig.11 This is a photo of the gel prepared in Example 3, showing a stable rectangular parallelepiped structure.

[0060] Example 4

[0061] Step 1: Weigh 1.2 g of threonine, 1.5 g of ammonium aluminum sulfate dodecahydrate and 10 g of deionized water into a reagent bottle, mix and stir under a constant temperature of 1 MPa and 30° C., and form a highly stable multivariate organic-inorganic hybrid cold storage brine based on the cation-dipole effect and anion-dipole effect between polar organic matter and inorganic salts;

[0062] Step 2: under a constant temperature of 80° C., 0.8 g of trehalose lipid is added to the organic-inorganic hybrid cold storage brine prepared in step 1, and an alternating magnetic field with an intensity of 300 mT and a frequency of 50 Hz is used to activate the organic-inorganic hybrid cold storage brine to prepare organic-inorganic hybrid cold storage brine nanoclusters;

[0063] Step 3: Weigh 1 g of carboxylated boron nitride nanowires, add them to the organic-inorganic hybrid cold storage brine nanoclusters prepared in step 2, and adsorb and wrap the boron nitride nanowires on the surface of the organic-inorganic hybrid cold storage brine nanoclusters through electrostatic induction, disperse them evenly, and form nano-oriented organic-inorganic hybrid cold storage brine nanoclusters, and ripen them at 1 MPa and 25° C. for 6 hours to obtain radially thermally conductive enhanced cold storage brine nanoclusters;

[0064] Step 4: Under a constant temperature of 80°C, add 0.7 g of polyphosphorylcholine modified with glycine to the radially thermally conductive enhanced organic-inorganic hybrid cold storage brine nanoclusters prepared in step 3, and prepare organic-inorganic hybrid cold storage brine nanocapsules based on the electrostatic interaction between the two.

[0065] Figure 5 This is a scanning electron micrograph of the gel prepared in Example 4;

[0066] Fig.12 This is a photo of the gel prepared in Example 4, showing a cylindrical and stable gel structure.

[0067] Example 5

[0068] Step 1: Weigh 1.2 g of threonine, 1.5 g of sodium aluminum sulfate dodecahydrate and 10 g of deionized water into a reagent bottle, mix and stir under a constant temperature of 1 MPa and 30° C., and form a highly stable multivariate organic-inorganic hybrid cold storage brine based on the cation-dipole effect and anion-dipole effect between polar organic matter and inorganic salts;

[0069] Step 2: under a constant temperature of 80° C., 0.8 g of mannose erythritol lipid is added to the organic-inorganic hybrid cold storage brine prepared in step 1, and an alternating magnetic field with an intensity of 180 mT and a frequency of 50 Hz is used to activate the organic-inorganic hybrid cold storage brine to prepare organic-inorganic hybrid cold storage brine nanoclusters;

[0070] Step 3: Weigh 2.5 g of quaternized boron nitride nanowires, add them to the organic-inorganic hybrid cold storage brine nanoclusters prepared in step 2, and adsorb and wrap the boron nitride nanowires on the surface of the organic-inorganic hybrid cold storage brine nanoclusters through electrostatic induction, disperse them evenly, and form nano-oriented cold storage brine nanoclusters, and ripen them at 1 MPa and 25° C. for 6 hours to obtain radially thermally conductive enhanced organic-inorganic hybrid cold storage brine nanoclusters;

[0071] Step 4: Under a constant temperature of 80°C, add 0.7 g of polyphosphorylcholine modified with glycine to the radially thermally conductive enhanced organic-inorganic hybrid cold storage brine nanoclusters prepared in step 3, and prepare organic-inorganic hybrid cold storage brine nanocapsules based on the electrostatic interaction between the two.

[0072] Figure 6 This is a scanning electron micrograph of the gel prepared in Example 5;

[0073] Fig.13 This is a physical picture of the gel prepared in Example 5, in which a petal-shaped stable gel structure can be seen.

[0074] Example 6

[0075] Step 1: weigh 1.2g of isoleucine, 1.5g of sodium aluminum sulfate dodecahydrate and 10g of deionized water into a reagent bottle, mix and stir under constant temperature conditions of 1MPa and 30°C, and form a highly stable multi-organic hybrid cold storage brine based on the cation-dipole effect and anion-dipole effect between polar organic matter and inorganic salts;

[0076] Step 2: under a constant temperature of 80° C., 0.8 g of mannose erythritol lipid is added to the organic-inorganic hybrid cold storage brine prepared in step 1, and an alternating magnetic field with an intensity of 180 mT and a frequency of 50 Hz is used to activate the organic-inorganic hybrid cold storage brine to prepare organic-inorganic hybrid cold storage brine nanoclusters;

[0077] Step 3: Weigh 1 g of quaternized boron nitride nanowires, add them to the organic-inorganic hybrid cold storage brine nanoclusters prepared in step 2, and adsorb and wrap the boron nitride nanowires on the surface of the organic-inorganic hybrid cold storage brine nanoclusters through electrostatic induction, disperse them evenly, and form nano-oriented organic-inorganic hybrid cold storage brine nanoclusters, and ripen them at 1 MPa and 25° C. for 6 hours to obtain radially thermally conductive enhanced cold storage brine nanoclusters;

[0078] Step 4: Under a constant temperature of 80°C, add 0.7 g of glycine-modified polycarboxybetaine to the radially thermally conductive enhanced organic-inorganic hybrid cold storage brine nanoclusters prepared in step 3, and prepare organic-inorganic hybrid cold storage brine nanocapsules based on the electrostatic interaction between the two.

[0079] Figure 7 This is a scanning electron micrograph of the gel prepared in Example 6;

[0080] Fig.14 This is a photo of the gel prepared in Example 6, showing a heart-shaped stable gel structure.

[0081] Example 7

[0082] Step 1: weigh 1.2g of isoleucine, 1.5g of potassium aluminum sulfate dodecahydrate and 10g of deionized water into a reagent bottle, mix and stir under constant temperature conditions of 1MPa and 30°C, and form a highly stable multi-organic hybrid cold storage brine based on the cation-dipole effect and anion-dipole effect between polar organic matter and inorganic salts;

[0083] Step 2: under a constant temperature of 80° C., 0.8 g of mannose erythritol lipid is added to the organic-inorganic hybrid cold storage brine prepared in step 1, and an alternating magnetic field with an intensity of 40 mT and a frequency of 50 Hz is used to activate the organic-inorganic hybrid cold storage brine to prepare organic-inorganic hybrid cold storage brine nanoclusters;

[0084] Step 3: Weigh 1 g of hydroxylated boron nitride nanowires, add them to the organic-inorganic hybrid cold storage brine nanoclusters prepared in step 2, and adsorb and wrap the boron nitride nanowires on the surface of the cold storage brine nanoclusters through electrostatic induction, disperse them evenly, and form nano-oriented organic-inorganic hybrid cold storage brine nanoclusters, and ripen them at 1 MPa and 25° C. for 6 hours to obtain radially thermally conductive enhanced organic-inorganic hybrid cold storage brine nanoclusters;

[0085] Step 4: Under a constant temperature of 80°C, add 0.7 g of polyglutamic acid modified with glycine to the radially thermally conductive enhanced organic-inorganic hybrid cold storage brine nanoclusters prepared in step 3, and prepare organic-inorganic hybrid cold storage brine nanocapsules based on the electrostatic interaction between the two.

[0086] Figure 8 This is a scanning electron micrograph of the gel prepared in Example 7;

[0087] Fig.15 This is a photo of the gel prepared in Example 7, showing a stable rectangular parallelepiped structure.

[0088] The phase change enthalpy values ​​of the composite gel cold storage materials prepared in Examples 1-7 were measured by DSC differential scanning calorimeter, and the thermal conductivity was measured by Hot disk. The specific values ​​are shown in Table 1:

[0089] Table 1 Enthalpy values ​​of the embodiments

[0090]

[0091] As shown in Table 1, the prepared gel has excellent performance through the design of organic-inorganic hybrid cold storage salt water nanocapsule encapsulation and radial thermal conductivity strengthening structure. While having a high enthalpy value, the thermal conductivity is also greatly improved. And after 100 cycles, the enthalpy value and thermal conductivity can be basically unchanged, and the quality retention rate is not less than 97%, reflecting good cycle stability and shape stability.

[0092] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered by the protection scope of the present invention.

Claims

1. A method for preparing organic-inorganic hybrid cold-storage salt water nanocapsules, characterized in that: The steps include: Step 1: Forming organic-inorganic hybrid cold storage brine through ion-dipole interaction: Under the conditions of 1 MPa and 30° C., based on the cation-dipole interaction and anion-dipole interaction between polar organic matter and inorganic salts, a multi-organic hybrid cold storage brine is formed; the polar organic matter is selected from one or more of lysine-aspartic acid, threonine, and isoleucine; the inorganic salt is selected from one or more of potassium aluminum sulfate dodecahydrate, ammonium aluminum sulfate dodecahydrate, and sodium aluminum sulfate dodecahydrate; Step 2: preparing organic-inorganic hybrid cold storage brine nanoclusters through hydrogen bond cooperative self-assembly: activating the organic-inorganic hybrid cold storage brine prepared in step 1 with an alternating magnetic field at 80° C., and then adding biomass amphiphilic small molecules to prepare organic-inorganic hybrid cold storage brine nanoclusters; the biomass amphiphilic small molecules are selected from one or more of trehalose lipids, sophorolipids, mannoerythritol lipids, and lichenin; Step 3: constructing radially thermally conductive enhanced organic-inorganic hybrid cold storage brine nanoclusters through electrostatically induced self-assembly: in the organic-inorganic hybrid cold storage brine nanoclusters prepared in step 2, the charged boron nitride nanowire thermal conductive filler is evenly dispersed through electrostatic induction to form nano-oriented organic-inorganic hybrid cold storage brine nanoclusters, and after aging, radially thermally conductive enhanced organic-inorganic hybrid cold storage brine nanoclusters are obtained; Step 4: Preparation of organic-inorganic hybrid cold storage brine nanocapsules by in-situ electrostatic encapsulation: at 80°C, add a biomass amphiphilic polymer with piezoelectric properties to the radially thermally conductive enhanced organic-inorganic hybrid cold storage brine nanoclusters prepared in step 3, and prepare organic-inorganic hybrid cold storage brine nanocapsules based on the electrostatic interaction between the two; the biomass amphiphilic polymer is selected from one or more of glycine-modified polysulfobetaine, glycine-modified polycarboxybetaine, glycine-modified polyphosphorylcholine, and glycine-modified polyglutamic acid.

2. The method for preparing an organic-inorganic hybrid cold-storage salt water nanocapsule according to claim 1, characterized in that: The percentage contents of the polar organic matter, inorganic salt and water in step 1 are in the range of (0.5%:0.5%:99%) to (20%:20%:60%).

3. The method for preparing an organic-inorganic hybrid cold-storage salt water nanocapsule according to claim 1, characterized in that: The content of the biomass amphiphilic small molecules in step 2 is 0.5% to 10% of the content of the organic-inorganic hybrid cold-storage brine nanocapsule.

4. The method for preparing an organic-inorganic hybrid cold-storage salt water nanocapsule according to claim 1, characterized in that: The intensity of the alternating magnetic field in step 2 is 40mT to 300mT, and the frequency is 10Hz to 80Hz.

5. The method for preparing an organic-inorganic hybrid cold-storage salt water nanocapsule according to claim 1, characterized in that: The boron nitride nanowire thermal conductive filler in step 3 is selected from one or more of hydroxylated boron nitride nanowires, carboxylated boron nitride nanowires, and quaternized boron nitride nanowires, and the content of the boron nitride nanowire thermal conductive filler is 0.5% to 10% of the content of the organic-inorganic hybrid cold storage brine nanocapsule.

6. The method for preparing an organic-inorganic hybrid cold-storage salt water nanocapsule according to claim 1, characterized in that: The aging temperature in step 3 is 20-30° C., and the aging time is 5-6 hours.

7. The method for preparing an organic-inorganic hybrid cold-storage salt water nanocapsule according to claim 1, characterized in that: The content of the biomass amphoteric polymer in step 4 is 0.5% to 10% of the content of the organic-inorganic hybrid cold-storage brine nanocapsule.

8. An organic-inorganic hybrid cold-storage salt water nanocapsule, characterized in that: Prepared by the preparation method according to any one of claims 1 to 7.

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