An organic-inorganic hybrid energy storage cold saline nano-capsule and its preparation method

Abstract

The present invention discloses an organic-inorganic hybrid cold storage brine nano-capsule and a preparation method thereof. First, an organic-inorganic hybrid cold storage brine is formed through ion-dipole interaction and hydrogen bond-assisted self-assembly to prepare cold storage brine nano-clusters. Then, organic-inorganic hybrid cold storage brine nano-clusters are prepared through hydrogen bond-assisted self-assembly. Next, inorganic nanowires are adsorbed and wrapped around the phase change matrix by electrostatic force, and an organic-inorganic hybrid cold storage brine nano-cluster with enhanced radial heat conduction is constructed through electrostatic-induced self-assembly. Finally, an organic-inorganic hybrid cold storage brine nano-capsule is prepared through in-situ electrostatic wrapping. The preparation process of the present invention is simple, and the obtained material has the advantages of high enthalpy value, high thermal conductivity, high strength, good shape stability, cycle stability and environmental friendliness.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage gel materials, and particularly to an organic-inorganic hybrid energy storage brine nano-capsule and a preparation method thereof. Background Art

[0002] In cold chain logistics, the storage in cold storages and the transportation in refrigerated trucks consume a large amount of electricity and energy, which not only increases the cost but also greatly increases carbon emissions. Moreover, during the transportation from the cold storage to the consumers, due to the inadequate energy storage facilities, the problem of "broken cold chain" still exists, which also causes some related health and safety problems. Today, with the gradual depletion of fossil energy, how to ensure the popularity of cold chain transportation and storage while taking into account the cost and the efficient utilization of energy is an urgent problem to be solved.

[0003] Energy storage materials are mainly divided into phase change energy storage materials and non-phase change energy storage materials. Currently, the mainstream phase change energy storage materials have disadvantages such as low latent heat of phase change, easy leakage, poor thermal conductivity, and high price. And the non-phase change energy storage materials have disadvantages such as difficult preparation, large pollution, and poor recyclability. Under such circumstances, it is crucial to find energy storage materials that are green and environmentally friendly, have high energy density, and good stability. Summary of the Invention

[0004] One of the purposes of the present invention is to provide a preparation method of an organic-inorganic hybrid energy storage brine nano-capsule, which is simple and easy to operate.

[0005] Another purpose of the present invention is to provide an organic-inorganic hybrid energy storage brine nano-capsule 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 purposes, the technical solutions adopted by the present invention are as follows:

[0007] In the first aspect, the present invention provides a preparation method of an organic-inorganic hybrid energy storage brine nano-capsule, comprising the following steps:

[0008] Step 1: Form an organic-inorganic hybrid energy 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 a polar organic substance and an inorganic salt, a highly stable and multi-component organic-inorganic hybrid energy storage brine is formed; the polar organic substance is selected from one or more of lysine-aspartic acid, threonine, and isoleucine; the inorganic salt is selected from one or more of potassium alum dodecahydrate, ammonium alum dodecahydrate, and sodium alum dodecahydrate;

[0009] Step 2: Preparation of organic-inorganic hybrid energy storage brine nanoclusters through hydrogen bond-assisted self-assembly: At 80 °C, the organic-inorganic hybrid energy storage brine prepared in Step 1 is activated by an alternating magnetic field, and then a biomass amphiphilic small molecule is added to obtain organic-inorganic hybrid energy storage brine nanoclusters; the biomass amphiphilic small molecule is selected from one or more of trehalose lipid, sophorolipid, mannitol erythritol lipid, and lichenysin.

[0010] Step 3: Construction of radially thermally enhanced organic-inorganic hybrid energy storage brine nanoclusters through electrostatic-induced self-assembly: In the organic-inorganic hybrid energy storage brine nanoclusters prepared in Step 2, charged boron nitride nanowire thermal conductive fillers are uniformly dispersed through electrostatic induction to form nanoscale-oriented organic-inorganic hybrid energy storage brine nanoclusters, and radially thermally enhanced organic-inorganic hybrid energy storage brine nanoclusters are obtained after aging.

[0011] Step 4: Preparation of organic-inorganic hybrid energy storage brine nanocapsules through in-situ electrostatic encapsulation: At 80 °C, a piezoelectric biomass amphiphilic polymer is added to the radially thermally enhanced organic-inorganic hybrid energy storage brine nanoclusters prepared in Step 3, and organic-inorganic hybrid energy storage brine nanocapsules are obtained based on their electrostatic interaction; the biomass amphiphilic polymer is selected from one or more of glycine-modified poly(sulfobetaine), glycine-modified poly(carboxybetaine), glycine-modified poly(phosphorylcholine), and glycine-modified poly(glutamic acid).

[0012] Preferably, the percentage contents of the polar organic substance, inorganic salt, and water in Step 1 are in the range of (0.5%: 0.5%: 99%) to (20%: 20%: 60%).

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

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

[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 energy storage brine nanocapsules.

[0016] Preferably, the aging temperature in Step 3 is 20 to 30 °C, and the aging time is 5 to 6 h.

[0017] Preferably, the content of the biomass amphiphilic polymer in Step 4 is 0.5% to 10% of the content of the organic-inorganic hybrid energy storage brine nanocapsules.

[0018] On the other hand, the present invention also provides an organic-inorganic hybrid cold storage brine nano-capsule prepared by the above preparation method.

[0019] The organic-inorganic hybrid cold storage brine nano-capsule prepared by the present invention has a high enthalpy value and high thermal conductivity. After 100 cycles, the enthalpy value and thermal conductivity can be basically unchanged, and the mass retention rate is also close to 99%, showing 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 nano-capsule prepared by the present invention can store a large amount of cold, and its 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 a high enthalpy value, and by using cation-dipole interaction and anion-dipole interaction, a highly stable and multi-component organic-inorganic hybrid cold storage brine is formed. The added biomass amphoteric polymer component can well wrap the cold storage brine nano-clusters through in-situ electrostatic force, realizing the leakage prevention of the phase change material, highlighting good shape stability and cycle stability, and endowing the material with flexible characteristics to avoid brittle fracture.

[0022] (2) The selected thermal conductive filler of the present invention is an inorganic nanowire, and a thermal conductive channel formed by it effectively improves the thermal conductivity of the phase change material and accelerates the cooling speed of the material. And by using valley electricity for cold storage, the use of flat and peak electricity is avoided, saving energy, reducing carbon emissions and costs. Description of the Drawings

[0023] Figure 1 It is a process diagram for the preparation of the organic-inorganic hybrid cold storage brine nano-capsule;

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

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

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

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

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

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

[0030] Figure 8 SEM image of the gel prepared in Example 5;

[0031] Figure 9 Physical image of the gel prepared in Example 1;

[0032] Figure 10 Physical image of the gel prepared in Example 2;

[0033] Figure 11 Physical image of the gel prepared in Example 3;

[0034] Figure 12 Physical image of the gel prepared in Example 4;

[0035] Figure 13 Physical image of the gel prepared in Example 5;

[0036] Figure 14 Physical image of the gel prepared in Example 6;

[0037] Figure 15 Physical image of the gel prepared in Example 7. Detailed implementation method

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

[0039] Example 1

[0040] Step 1: Weigh 2 g of lysine-aspartic acid, 2 g of potassium alum dodecahydrate and 6 g of deionized water into a reagent bottle, and mix and stir under the conditions of 1 MPa and 30 °C constant temperature. Based on the cation-dipole interaction and anion-dipole interaction between polar organic substances and inorganic salts, a highly stable multi-component organic-inorganic hybrid cold storage brine is formed;

[0041] Step 2: Under the condition of 80 °C constant temperature, add 1.43 g of trehalose lipid to the organic-inorganic hybrid cold storage brine prepared in Step 1, and use an alternating magnetic field with a strength of 180 mT and a frequency of 50 Hz to activate the organic-inorganic hybrid cold storage brine to obtain organic-inorganic hybrid cold storage brine nanoclusters;

[0042] Step 3: Weigh 1.43 g of hydroxylated boron nitride nanowires and add them to the organic-inorganic hybrid cold storage brine nanoclusters prepared in Step 2. Through electrostatic induction, the boron nitride nanowires are adsorbed and wrapped on the surface of the cold storage brine nanoclusters and dispersed evenly to form nano-oriented organic-inorganic hybrid cold storage brine nanoclusters; Cure for 6 h under the conditions of 1 MPa and 25 °C to obtain radially thermally enhanced organic-inorganic hybrid cold storage brine nanoclusters;

[0043] Step 4: Under the condition of constant temperature at 80 °C, add 1.43 g of glycine-modified poly(sulfobetaine) to the radially thermally 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.

[0044] Figure 2 SEM image of the gel prepared in Example 1;

[0045] Figure 9 Physical image of the gel prepared in Example 1. A stable gel structure in the shape of a triangular prism can be seen.

[0046] Example 2

[0047] Step 1: Weigh 0.5 g of threonine, 0.5 g of potassium alum dodecahydrate, and 9 g of deionized water into a reagent bottle, and mix and stir under the conditions of 1 MPa and constant temperature at 30 °C. Based on the cation-dipole interaction and anion-dipole interaction between polar organic substances and inorganic salts, form a highly stable multi-component organic-inorganic hybrid cold storage brine;

[0048] Step 2: Under the condition of constant temperature at 80 °C, add 0.59 g of sophorolipid to the organic-inorganic hybrid cold storage brine prepared in Step 1, and activate the organic-inorganic hybrid cold storage brine with an alternating magnetic field with a strength of 180 mT and a frequency of 50 Hz to prepare 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. Cure for 6 h under the conditions of 1 MPa and 25 °C to prepare radially thermally enhanced organic-inorganic hybrid cold storage brine nanoclusters;

[0050] Step 4: Under the condition of constant temperature at 80 °C, add 0.59 g of glycine-modified poly(sulfobetaine) to the radially thermally 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 SEM image of the gel prepared in Example 2;

[0052] Figure 10 Physical image of the gel prepared in Example 2. A stable gel structure in the shape of a cube can be seen.

[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, and mix and stir under the constant temperature conditions of 1 MPa and 30 °C. Based on the cation-dipole interaction and anion-dipole interaction between polar organic substances and inorganic salts, a highly stable and multi-component organic-inorganic hybrid cold storage brine is formed;

[0055] Step 2: Under the constant temperature condition of 80 °C, add 0.8 g of lichenin to the organic-inorganic hybrid cold storage brine prepared in Step 1, and use an alternating magnetic field with an intensity of 180 mT and a frequency of 50 Hz to activate the organic-inorganic hybrid cold storage brine to obtain organic-inorganic hybrid cold storage brine nanoclusters;

[0056] Step 3: Weigh 1 g of hydroxylated boron nitride nanowires and add them to the organic-inorganic hybrid cold storage brine nanoclusters prepared in Step 2. Through electrostatic induction, the boron nitride nanowires are adsorbed and wrapped on the surface of the organic-inorganic hybrid cold storage brine nanoclusters, and are evenly dispersed to form nanometer-oriented organic-inorganic hybrid cold storage brine nanoclusters, and cure for 6 h under the conditions of 1 MPa and 25 °C to obtain radially thermally enhanced cold storage brine nanoclusters;

[0057] Step 4: Under the constant temperature condition of 80 °C, add 0.7 g of glycine-modified poly(sulfobetaine) to the radially thermally enhanced organic-inorganic hybrid cold storage brine nanoclusters prepared in Step 3, and prepare organic-inorganic hybrid cold storage brine nanocapsules based on their electrostatic interaction.

[0058] Figure 4 The gel scanning electron micrograph prepared for Example 3;

[0059] Figure 11 The gel physical diagram prepared for Example 3, and a stable gel structure in the shape of a cuboid can be seen.

[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, and mix and stir under the constant temperature conditions of 1 MPa and 30 °C. Based on the cation-dipole interaction and anion-dipole interaction between polar organic substances and inorganic salts, a highly stable and multi-component organic-inorganic hybrid cold storage brine is formed;

[0062] Step 2: Under the constant temperature condition of 80 °C, add 0.8 g of trehalose lipid to the organic-inorganic hybrid cold storage brine prepared in Step 1, and use an alternating magnetic field with an intensity of 300 mT and a frequency of 50 Hz to activate the organic-inorganic hybrid cold storage brine to obtain organic-inorganic hybrid cold storage brine nanoclusters;

[0063] Step 3: Weigh 1 g of carboxylated boron nitride nanowires and add them to the organic-inorganic hybrid cold storage brine nanoclusters prepared in Step 2. Through electrostatic induction, the boron nitride nanowires are adsorbed and wrapped on the surface of the organic-inorganic hybrid cold storage brine nanoclusters, and are evenly dispersed to form nanocrystalline-oriented organic-inorganic hybrid cold storage brine nanoclusters, which are cured for 6 h under the conditions of 1 MPa and 25 °C to obtain radially thermally enhanced cold storage brine nanoclusters;

[0064] Step 4: Under the condition of constant temperature at 80 °C, add 0.7 g of glycine-modified polyphosphorylcholine to the radially thermally 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 It is the gel scanning electron micrograph prepared for Example 4;

[0066] Figure 12 It is the gel physical diagram prepared for Example 4, and a cylindrical and stable gel structure can be seen.

[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 in a reagent bottle, and mix and stir under the conditions of constant temperature at 1 MPa and 30 °C. Based on the cation-dipole interaction and anion-dipole interaction between polar organic substances and inorganic salts, a highly stable multi-component organic-inorganic hybrid cold storage brine is formed;

[0069] Step 2: Under the condition of constant temperature at 80 °C, add 0.8 g of mannitol erythritol lipid to the organic-inorganic hybrid cold storage brine prepared in Step 1, and activate the organic-inorganic hybrid cold storage brine with an alternating magnetic field with an intensity of 180 mT and a frequency of 50 Hz to obtain organic-inorganic hybrid cold storage brine nanoclusters;

[0070] Step 3: Weigh 2.5 g of quaternized boron nitride nanowires and add them to the organic-inorganic hybrid cold storage brine nanoclusters prepared in Step 2. Through electrostatic induction, the boron nitride nanowires are adsorbed and wrapped on the surface of the organic-inorganic hybrid cold storage brine nanoclusters, and are evenly dispersed to form nanocrystalline-oriented cold storage brine nanoclusters, which are cured for 6 h under the conditions of 1 MPa and 25 °C to obtain radially thermally enhanced organic-inorganic hybrid cold storage brine nanoclusters;

[0071] Step 4: Under the condition of constant temperature at 80 °C, add 0.7 g of glycine-modified polyphosphorylcholine to the radially thermally 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 SEM image of the gel prepared in Example 5;

[0073] Figure 13 Photograph of the gel prepared in Example 5, showing a stable petal-shaped gel structure.

[0074] Example 6

[0075] Step 1: Weigh 1.2 g of isoleucine, 1.5 g of sodium aluminum sulfate dodecahydrate, and 10 g of deionized water into a reagent bottle, and mix and stir under constant temperature conditions of 1 MPa and 30 °C. Based on the cation-dipole interaction and anion-dipole interaction between polar organic substances and inorganic salts, a highly stable multi-component organic-inorganic hybrid cold storage brine is formed.

[0076] Step 2: Under constant temperature conditions of 80 °C, add 0.8 g of mannitol erythritol lipid to the organic-inorganic hybrid cold storage brine prepared in Step 1, and activate the organic-inorganic hybrid cold storage brine with an alternating magnetic field of 180 mT and a frequency of 50 Hz to obtain organic-inorganic hybrid cold storage brine nanoclusters.

[0077] Step 3: Weigh 1 g of quaternized boron nitride nanowires and add them to the organic-inorganic hybrid cold storage brine nanoclusters prepared in Step 2. Through electrostatic induction, the boron nitride nanowires are adsorbed and wrapped on the surface of the organic-inorganic hybrid cold storage brine nanoclusters, and dispersed evenly to form nano-oriented organic-inorganic hybrid cold storage brine nanoclusters. Cure at 1 MPa and 25 °C for 6 h to obtain radially thermally enhanced cold storage brine nanoclusters.

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

[0079] Figure 7 SEM image of the gel prepared in Example 6;

[0080] Figure 14 Photograph of the gel prepared in Example 6, showing a stable heart-shaped gel structure.

[0081] Example 7

[0082] Step 1: Weigh 1.2 g of isoleucine, 1.5 g of potassium aluminum sulfate dodecahydrate, and 10 g of deionized water into a reagent bottle, and mix and stir under constant temperature conditions of 1 MPa and 30 °C. Based on the cation-dipole interaction and anion-dipole interaction between polar organic substances and inorganic salts, a highly stable multi-component organic-inorganic hybrid cold storage brine is formed.

[0083] Step 2: Under the condition of constant temperature at 80 °C, add 0.8 g of mannitol erythritol lipid to the organic-inorganic hybrid energy storage brine prepared in Step 1, and activate the organic-inorganic hybrid energy storage brine by using an alternating magnetic field with an intensity of 40 mT and a frequency of 50 Hz to obtain organic-inorganic hybrid energy storage brine nanoclusters;

[0084] Step 3: Weigh 1 g of hydroxylated boron nitride nanowires and add them to the organic-inorganic hybrid energy storage brine nanoclusters prepared in Step 2. Through electrostatic induction, the boron nitride nanowires are adsorbed and wrapped on the surface of the energy storage brine nanoclusters, and are evenly dispersed to form nanocrystalline-oriented organic-inorganic hybrid energy storage brine nanoclusters. Cure them for 6 h under the conditions of 1 MPa and 25 °C to obtain radially thermally enhanced organic-inorganic hybrid energy storage brine nanoclusters;

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

[0086] Figure 8 It is the scanning electron microscope image of the gel prepared in Example 7;

[0087] Figure 15 It is the physical image of the gel prepared in Example 7, and a stable gel structure in the shape of a cuboid can be seen.

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

[0089] Table 1 Enthalpy values of the examples

[0090]

[0091] As can be seen from Table 1, through the design of organic-inorganic hybrid energy storage brine nanocapsule encapsulation and radially thermally enhanced structure, the prepared gel has excellent performance. While having a high enthalpy value, the thermal conductivity has also been greatly improved. And after 100 cycles, the enthalpy value and thermal conductivity can basically remain unchanged, and the mass retention rate is not less than 97%, showing good cycle stability and shape stability.

[0092] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention shall 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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