A composite phase change material using dual network packaging and preparation method thereof

Abstract

The present invention belongs to the technical field of phase change materials, and specifically relates to a composite phase change material using double network encapsulation and a preparation method thereof. In the product developed by the present invention, the following components are included by weight: 100 parts of phase change material; 20 parts of sodium alginate (SA); 1 to 9 parts of graphene oxide (GO); 1 to 9 parts of L-ascorbic acid (VC); 1 to 5 parts of thermal conductive filler; 1 to 3 parts of nucleating agent. The composite phase change material is prepared by a sol-gel method. The design of double network encapsulation not only effectively prevents the problem of leakage of the material during the solid-liquid phase change process, but also the formation of the thermal conductive network therein also improves the material's ability to respond to temperature. The preparation process of the present invention is simple, the molding effect is good, and it has certain potential value in the fields of electronic device temperature control, building thermal management, photothermal conversion, etc.

Description

Technical Field

[0001] The present invention belongs to the technical field of phase change materials, and in particular relates to a composite phase change material using double network packaging, and a method for preparing the composite phase change material. Background Art

[0002] Phase change materials (PCMs) are ideal thermal energy storage materials, capable of absorbing or releasing heat through a solid-liquid phase transition at specific temperatures. This property makes them valuable for research in areas such as building energy conservation, electronic equipment cooling, and thermal insulation clothing. However, the inevitable leakage of PCMs during the solid-liquid transition significantly limits their application. Therefore, it is crucial to select the right packaging method to achieve a stable composite PCM.

[0003] Graphene is a single layer of carbon atoms in sp 2 Nanomaterials with a two-dimensional honeycomb network structure, formed by densely packed hybrid orbitals, are typically prepared using graphene oxide (GO) as a precursor by eliminating oxygen-containing functional groups. Furthermore, graphene sheets can self-assemble into three-dimensional networks through the interaction of π-π conjugation and van der Waals forces, giving them promising applications in a wide range of fields.

[0004] Using a single graphene network to encapsulate phase-change materials is a common packaging method, but the formation of the network requires a large amount of expensive graphene, which is not conducive to industrial production. Furthermore, composite phase-change materials prepared using single-network encapsulation often perform poorly in thermal cycling, which limits their further application. Summary of the Invention

[0005] The purpose of the present invention is to solve the above technical problems and provide a composite phase change material using double network packaging and a preparation method thereof, so that the new composite phase change material prepared by the present invention has the advantages of strong thermal conductivity, good packaging effect, strong thermal stability and low production cost.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] The composite phase change material using double network packaging includes the following components by weight:

[0008] 100 parts of phase change material;

[0009] 20 parts of sodium alginate (SA);

[0010] 1 to 9 parts of graphene oxide (GO);

[0011] 1-9 parts of L-ascorbic acid (VC);

[0012] 1 to 5 parts of thermal conductive filler;

[0013] 1 to 3 parts of nucleating agent.

[0014] Preferably, the phase change material is one or a combination of two or more of polyethylene glycol 2000 (PEG-2000), polyethylene glycol 4000 (PEG-4000), and polyethylene glycol 6000 (PEG-6000).

[0015] Preferably, the viscosity of the SA is 5000 mPa·s, and the pH value of a 1% aqueous solution thereof is 6-8.

[0016] Preferably, the GO has a thickness of 1-2 nm, a diameter of 15-20 μm, and a specific surface area of ​​300-350 m 2 / g, and the carbon content accounts for 51-55%.

[0017] Preferably, the VC has a molecular weight of 176.12 g / mol and a density of 1.65 g / cm at 20°C. 3 .

[0018] Preferably, the thermally conductive filler is one or a combination of two or more of aluminum oxide, aluminum nitride, and silicon micropowder.

[0019] Preferably, the nucleating agent is one or a combination of two or more of sodium succinate, aluminum adipate, and sodium cinnamate.

[0020] The method for preparing the composite phase change material using dual network packaging comprises the following steps:

[0021] S1. GO was dispersed in 50 ml of deionized water and magnetically stirred at room temperature for 8 h. Then, ultrasonic exfoliation was performed at 400 W for 16 h to obtain a stable GO dispersion for use.

[0022] S2, adding phase change material, SA, GO, thermal conductive filler, and nucleating agent into GO dispersion, and mechanically stirring at 500 rpm for 3 h at 80°C to obtain GO / SA / PEG sol;

[0023] S3, adding VC to the above sol, stirring at room temperature until uniformly dispersed, and then placing it in a vacuum oven at 80°C for 6 hours to fully reduce GO to reduced graphene oxide (RGO) to form a first network, thereby obtaining an RGO / SA / PEG mixed sol;

[0024] S4, soaking the mixed sol in a 3 wt% calcium chloride (CaCl2) solution to form a second network by cross-linking SA with calcium ions to obtain RGO / CA / PEG gel;

[0025] S5. The gel was placed in an oven at 60° C. and dried for 12 h to obtain the desired product.

[0026] Preferably, in S1, the GO has a thickness of 1-2 nm, a diameter of 15-20 μm, and a specific surface area of ​​300-350 m 2 / g, and the carbon content accounts for 51-55%.

[0027] Preferably, in S2, the phase change material is one or a combination of two or more of polyethylene glycol 2000 (PEG-2000), polyethylene glycol 4000 (PEG-4000), and polyethylene glycol 6000 (PEG-6000).

[0028] The viscosity of the SA is 5000 mPa·s, and the pH value of a 1% aqueous solution thereof is 6-8.

[0029] The thermal conductive filler is one of aluminum oxide, aluminum nitride, and silicon micropowder, or a combination of two or more.

[0030] The nucleating agent is one or a combination of two or more of sodium succinate, aluminum adipate, and sodium cinnamate.

[0031] Preferably, in S3, the VC has a molecular weight of 176.12 g / mol and a density of 1.65 g / cm at 20°C. 3 .

[0032] Compared with the prior art, the composite phase change material using double network encapsulation provided by the present invention, the first network is a two-dimensional GO sheet reduction self-assembly to encapsulate the phase change material for the first time, and then calcium ion cross-linking SA is used for secondary encapsulation to prepare reduced graphene oxide / calcium alginate / polyethylene glycol (RGO / CA / PEG) composite phase change material. The RGO / CA / PEG prepared by the double network encapsulation technology can not only significantly improve the leakage problem of the phase change material, but also GO is reduced in situ in the SA solution by self-assembly, which can effectively prevent excessive agglomeration and accumulation between RGO, thereby giving PEG good thermal conductivity. The RGO / CA / PEG composite phase change material prepared based on the double network encapsulation technology has broad application prospects in solar energy utilization and thermal management.

[0033] Performance testing of composite phase change materials

[0034] Phase change enthalpy was measured using a differential scanning calorimeter. The test method was to characterize the thermal properties of the material in a nitrogen atmosphere within a temperature range of 0 to 80°C, with a heating rate of 10°C / min.

[0035] Thermal conductivity was tested using a TC3000E thermal conductivity meter. The sample was molded into a 30mm x 30mm x 5mm strip, which was then pressed against a sensor using a 500g weight. After thermal equilibrium was reached, each sample was tested five times, and the average result was calculated.

[0036] Leakage detection is performed using a temperature-controlled heating platform. This platform consists of an MY803-H intelligent temperature control chamber and an 1800W cast aluminum heating plate (dimensions: 300×200×20mm). The test method involves placing the sample on the heating platform, raising the temperature to 80°C and holding it for 30 minutes using a program, and then photographing any leaks with a camera. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 Leakage test diagram of pure phase change material and Examples 1-5 DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure is described in detail, clearly, and completely in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not intended to limit the present disclosure.

[0039] [Example 1]

[0040] This embodiment provides a composite phase change material using double network encapsulation, which includes the following components by weight: 100 parts of PEG-6000; 20 parts of SA; 1 part of GO; 1 part of VC; 3 parts of aluminum oxide; and 2 parts of aluminum adipate.

[0041] The viscosity of SA is 5000 mPa·s, and the pH value of its 1% aqueous solution is 6-8.

[0042] GO has a thickness of 1-2 nm, a diameter of 15-20 μm, and a specific surface area of ​​300-350 m 2 / g, and the carbon content accounts for 51-55%.

[0043] The preparation method of the composite phase change material using dual network packaging in this embodiment includes the following steps:

[0044] S1. GO was dispersed in 50 ml of deionized water and magnetically stirred at room temperature for 8 h. Then, ultrasonic exfoliation was performed at 400 W for 16 h to obtain a stable GO dispersion for use.

[0045] S2, adding phase change material, SA, GO, alumina, and aluminum adipate to the GO dispersion, and mechanically stirring at 500 rpm for 3 h at 80°C to obtain a GO / SA / PEG sol;

[0046] S3, adding VC to the above sol, stirring at room temperature until uniformly dispersed, and then placing it in a vacuum oven at 80°C for 6 hours to fully reduce GO to reduced graphene oxide (RGO) to form a first network, thereby obtaining an RGO / SA / PEG mixed sol;

[0047] S4, soaking the mixed sol in a 3 wt% calcium chloride (CaCl2) solution to form a second network by cross-linking SA with calcium ions to obtain RGO / CA / PEG gel;

[0048] S5. The gel was placed in an oven at 60° C. and dried for 12 h to obtain the desired product.

[0049] For comparison purposes, the experimental results are listed in Table 1.

[0050] [Example 2]

[0051] This embodiment provides a composite phase change material using double network encapsulation, which includes the following components by weight: 100 parts of PEG-4000; 20 parts of SA; 3 parts of GO; 3 parts of VC; 3 parts of aluminum nitride; and 2 parts of sodium cinnamate.

[0052] The viscosity of SA is 5000 mPa·s, and the pH value of its 1% aqueous solution is 6-8.

[0053] GO has a thickness of 1-2 nm, a diameter of 15-20 μm, and a specific surface area of ​​300-350 m 2 / g, and the carbon content accounts for 51-55%.

[0054] The preparation method of the composite phase change material using dual network packaging in this embodiment includes the following steps:

[0055] S1. GO was dispersed in 50 ml of deionized water and magnetically stirred at room temperature for 8 h. Then, ultrasonic exfoliation was performed at 400 W for 16 h to obtain a stable GO dispersion for use.

[0056] S2, adding phase change material, SA, GO, aluminum nitride, and sodium cinnamate into GO dispersion, and mechanically stirring at 500 rpm for 3 h at 80 °C to obtain GO / SA / PEG sol;

[0057] S3, adding VC to the above sol, stirring at room temperature until uniformly dispersed, and then placing it in a vacuum oven at 80°C for 6 hours to fully reduce GO to reduced graphene oxide (RGO) to form a first network, thereby obtaining an RGO / SA / PEG mixed sol;

[0058] S4, soaking the mixed sol in a 3 wt% calcium chloride (CaCl2) solution to form a second network by cross-linking SA with calcium ions to obtain RGO / CA / PEG gel;

[0059] S5. The gel was placed in an oven at 60° C. and dried for 12 h to obtain the desired product.

[0060] For comparison purposes, the experimental results are listed in Table 1.

[0061] [Example 3]

[0062] This embodiment provides a composite phase change material using double network encapsulation, which includes the following components by weight: 100 parts of PEG-2000; 20 parts of SA; 5 parts of GO; 5 parts of VC; 3 parts of silicon powder; and 2 parts of sodium succinate.

[0063] The viscosity of SA is 5000 mPa·s, and the pH value of its 1% aqueous solution is 6-8.

[0064] GO has a thickness of 1-2 nm, a diameter of 15-20 μm, and a specific surface area of ​​300-350 m 2 / g, and the carbon content accounts for 51-55%.

[0065] The preparation method of the composite phase change material using dual network packaging in this embodiment includes the following steps:

[0066] S1. GO was dispersed in 50 ml of deionized water and magnetically stirred at room temperature for 8 h. Then, ultrasonic exfoliation was performed at 400 W for 16 h to obtain a stable GO dispersion for use.

[0067] S2, adding phase change material, SA, GO, silica powder, and sodium succinate to the GO dispersion, and mechanically stirring at 500 rpm for 3 h at 80°C to obtain GO / SA / PEG sol;

[0068] S3, adding VC to the above sol, stirring at room temperature until uniformly dispersed, and then placing it in a vacuum oven at 80°C for 6 hours to fully reduce GO to reduced graphene oxide (RGO) to form a first network, thereby obtaining an RGO / SA / PEG mixed sol;

[0069] S4, soaking the mixed sol in a 3 wt% calcium chloride (CaCl2) solution to form a second network by cross-linking SA with calcium ions to obtain RGO / CA / PEG gel;

[0070] S5. The gel was placed in an oven at 60° C. and dried for 12 h to obtain the desired product.

[0071] For comparison purposes, the experimental results are listed in Table 1.

[0072] [Example 4]

[0073] This embodiment provides a composite phase change material using double network encapsulation, which includes the following components by weight: 100 parts of PEG-6000; 20 parts of SA; 7 parts of GO; 7 parts of VC; 3 parts of aluminum oxide; and 2 parts of aluminum adipate.

[0074] The viscosity of SA is 5000 mPa·s, and the pH value of its 1% aqueous solution is 6-8.

[0075] GO has a thickness of 1-2 nm, a diameter of 15-20 μm, and a specific surface area of ​​300-350 m 2 / g, and the carbon content accounts for 51-55%.

[0076] The preparation method of the composite phase change material using dual network packaging in this embodiment includes the following steps:

[0077] S1. GO was dispersed in 50 ml of deionized water and magnetically stirred at room temperature for 8 h. Then, ultrasonic exfoliation was performed at 400 W for 16 h to obtain a stable GO dispersion for use.

[0078] S2, adding phase change material, SA, GO, alumina, and aluminum adipate to the GO dispersion, and mechanically stirring at 500 rpm for 3 h at 80°C to obtain a GO / SA / PEG sol;

[0079] S3, adding VC to the above sol, stirring at room temperature until uniformly dispersed, and then placing it in a vacuum oven at 80°C for 6 hours to fully reduce GO to reduced graphene oxide (RGO) to form a first network, thereby obtaining an RGO / SA / PEG mixed sol;

[0080] S4, soaking the mixed sol in a 3 wt% calcium chloride (CaCl2) solution to form a second network by cross-linking SA with calcium ions to obtain RGO / CA / PEG gel;

[0081] S5. The gel was placed in an oven at 60° C. and dried for 12 h to obtain the desired product.

[0082] For the convenience of comparison, the experimental results are listed in Table 1.

[0083] [Example 5]

[0084] This embodiment provides a composite phase change material using double network encapsulation, which includes the following components by weight: 100 parts of PEG-6000; 20 parts of SA; 9 parts of GO; 9 parts of VC; 3 parts of aluminum oxide; and 2 parts of aluminum adipate.

[0085] The viscosity of SA is 5000 mPa·s, and the pH value of its 1% aqueous solution is 6-8.

[0086] GO has a thickness of 1-2 nm, a diameter of 15-20 μm, and a specific surface area of ​​300-350 m 2 / g, and the carbon content accounts for 51-55%.

[0087] The preparation method of the composite phase change material using dual network packaging in this embodiment includes the following steps:

[0088] S1. GO was dispersed in 50 ml of deionized water and magnetically stirred at room temperature for 8 h. Then, ultrasonic exfoliation was performed at 400 W for 16 h to obtain a stable GO dispersion for use.

[0089] S2, adding phase change material, SA, GO, alumina, and aluminum adipate to the GO dispersion, and mechanically stirring at 500 rpm for 3 h at 80°C to obtain a GO / SA / PEG sol;

[0090] S3, adding VC to the above sol, stirring at room temperature until uniformly dispersed, and then placing it in a vacuum oven at 80°C for 6 hours to fully reduce GO to reduced graphene oxide (RGO) to form a first network, thereby obtaining an RGO / SA / PEG mixed sol;

[0091] S4, soaking the mixed sol in a 3 wt% calcium chloride (CaCl2) solution to form a second network by cross-linking SA with calcium ions to obtain RGO / CA / PEG gel;

[0092] S5. The gel was placed in an oven at 60° C. and dried for 12 h to obtain the desired product.

[0093] For comparison purposes, the experimental results are listed in Table 1.

[0094] [Example 6]

[0095] This embodiment provides a composite phase change material using double network encapsulation, which includes the following components by weight: 100 parts of PEG-6000; 20 parts of SA; 7 parts of GO; 7 parts of VC; 1 part of aluminum oxide; and 2 parts of aluminum adipate.

[0096] The viscosity of SA is 5000 mPa·s, and the pH value of its 1% aqueous solution is 6-8.

[0097] GO has a thickness of 1-2 nm, a diameter of 15-20 μm, and a specific surface area of ​​300-350 m 2 / g, and the carbon content accounts for 51-55%.

[0098] The preparation method of the composite phase change material using dual network packaging in this embodiment includes the following steps:

[0099] S1. GO was dispersed in 50 ml of deionized water and magnetically stirred at room temperature for 8 h. Then, ultrasonic exfoliation was performed at 400 W for 16 h to obtain a stable GO dispersion for use.

[0100] S2, adding phase change material, SA, GO, alumina, and aluminum adipate to the GO dispersion, and mechanically stirring at 500 rpm for 3 h at 80°C to obtain a GO / SA / PEG sol;

[0101] S3, adding VC to the above sol, stirring at room temperature until uniformly dispersed, and then placing it in a vacuum oven at 80°C for 6 hours to fully reduce GO to reduced graphene oxide (RGO) to form a first network, thereby obtaining an RGO / SA / PEG mixed sol;

[0102] S4, soaking the mixed sol in a 3 wt% calcium chloride (CaCl2) solution to form a second network by cross-linking SA with calcium ions to obtain RGO / CA / PEG gel;

[0103] S5. The gel was placed in an oven at 60° C. and dried for 12 h to obtain the desired product.

[0104] For the convenience of comparison, the experimental results are listed in Table 1.

[0105] [Example 7]

[0106] This embodiment provides a composite phase change material using double network encapsulation, which includes the following components by weight: 100 parts of PEG-6000; 20 parts of SA; 7 parts of GO; 7 parts of VC; 5 parts of aluminum oxide; and 2 parts of aluminum adipate.

[0107] The viscosity of SA is 5000 mPa·s, and the pH value of its 1% aqueous solution is 6-8.

[0108] GO has a thickness of 1-2 nm, a diameter of 15-20 μm, and a specific surface area of ​​300-350 m 2 / g, and the carbon content accounts for 51-55%.

[0109] The preparation method of the composite phase change material using dual network packaging in this embodiment includes the following steps:

[0110] S1. GO was dispersed in 50 ml of deionized water and magnetically stirred at room temperature for 8 h. Then, ultrasonic exfoliation was performed at 400 W for 16 h to obtain a stable GO dispersion for use.

[0111] S2, adding phase change material, SA, GO, alumina, and aluminum adipate to the GO dispersion, and mechanically stirring at 500 rpm for 3 h at 80°C to obtain a GO / SA / PEG sol;

[0112] S3, adding VC to the above sol, stirring at room temperature until uniformly dispersed, and then placing it in a vacuum oven at 80°C for 6 hours to fully reduce GO to reduced graphene oxide (RGO) to form a first network, thereby obtaining an RGO / SA / PEG mixed sol;

[0113] S4, soaking the mixed sol in a 3 wt% calcium chloride (CaCl2) solution to form a second network by cross-linking SA with calcium ions to obtain RGO / CA / PEG gel;

[0114] S5. The gel was placed in an oven at 60° C. and dried for 12 h to obtain the desired product.

[0115] For the convenience of comparison, the experimental results are listed in Table 1.

[0116] [Comparative Example 1]

[0117] This embodiment provides a composite phase change material using double network encapsulation, which includes the following components by weight: 100 parts of PEG-6000; 20 parts of SA; 7 parts of GO; 7 parts of VC; and 2 parts of aluminum adipate.

[0118] The viscosity of SA is 5000 mPa·s, and the pH value of its 1% aqueous solution is 6-8.

[0119] GO has a thickness of 1-2 nm, a diameter of 15-20 μm, and a specific surface area of ​​300-350 m 2 / g, and the carbon content accounts for 51-55%.

[0120] The preparation method of the composite phase change material using dual network packaging in this embodiment includes the following steps:

[0121] S1. GO was dispersed in 50 ml of deionized water and magnetically stirred at room temperature for 8 h. Then, ultrasonic exfoliation was performed at 400 W for 16 h to obtain a stable GO dispersion for use.

[0122] S2. Phase change material, SA, GO, and aluminum adipate were added to the GO dispersion and mechanically stirred at 500 rpm for 3 h at 80°C to obtain a GO / SA / PEG sol.

[0123] S3, adding VC to the above sol, stirring at room temperature until uniformly dispersed, and then placing it in a vacuum oven at 80°C for 6 hours to fully reduce GO to reduced graphene oxide (RGO) to form a first network, thereby obtaining an RGO / SA / PEG mixed sol;

[0124] S4, soaking the mixed sol in a 3 wt% calcium chloride (CaCl2) solution to form a second network by cross-linking SA with calcium ions to obtain RGO / CA / PEG gel;

[0125] S5. The gel was placed in an oven at 60° C. and dried for 12 h to obtain the desired product.

[0126] For comparison purposes, the experimental results are listed in Table 1.

[0127] Table 1

[0128]

[0129] As can be seen from Table 1, the content of thermally conductive filler and GO will affect the thermal conductivity of the material. In the present invention, Example 4 exhibits good thermal performance (ΔHm=143.1 J / g), high thermal conductivity (1.50 W / m·K) and strong packaging capability (maintained at 80°C for 30 minutes without leakage of phase change material).

[0130] It should be noted that the embodiments described above are only used to illustrate the present invention and do not constitute any limitation of the present invention. The present invention has been described with reference to typical embodiments, but it should be understood that the words used therein are descriptive and explanatory words, rather than restrictive words. The present invention may be modified as specified within the scope of the claims of the present invention, and the present invention may be revised without departing from the scope and spirit of the present invention; although the present invention described therein relates to specific methods, materials and embodiments, it does not mean that the present invention is limited to the specific examples disclosed therein, but rather the present invention can be extended to all other methods and applications having the same function.

Claims

1. A method for preparing a composite phase change material using dual network packaging, comprising the following steps: S1. Graphene oxide (GO) was dispersed in 50 ml of deionized water, magnetically stirred at room temperature for 8 h, and then ultrasonically exfoliated at 400 W for 16 h to obtain a stable GO dispersion for use; S2, adding phase change material (PEG), sodium alginate (SA), GO, thermal conductive filler, and nucleating agent into GO dispersion, and mechanically stirring at 500 rpm for 3 h at 80°C to obtain GO / SA / PEG sol; S3, adding L-ascorbic acid (VC) to the above sol, stirring at room temperature until uniformly dispersed, and then placing it in a vacuum oven at 80°C for 6 hours to fully reduce GO to reduced graphene oxide (RGO) to form a first network, thereby obtaining an RGO / SA / PEG mixed sol; S4, soaking the mixed sol in a 3 wt% calcium chloride (CaCl2) solution to form a second network by cross-linking SA with calcium ions to obtain RGO / CA / PEG gel; S5. The gel was placed in an oven at 60° C. and dried for 12 h to obtain the desired product.

2. The method for preparing a composite phase change material using dual network packaging according to claim 1, characterized in that: By weight, it includes the following components: Phase change material (PEG) 100 parts; 20 parts of sodium alginate (SA); 1 to 9 parts of graphene oxide (GO); 1-9 parts of L-ascorbic acid (VC); 1 to 5 parts of thermal conductive filler; 1 to 3 parts of nucleating agent.

3. The method for preparing a composite phase change material using dual network packaging according to claim 2, characterized in that: The phase change material is one of polyethylene glycol 2000 (PEG-2000), polyethylene glycol 4000 (PEG-4000), and polyethylene glycol 6000 (PEG-6000), or a combination of two or more.

4. The method for preparing a composite phase change material using dual network packaging according to claim 2, characterized in that: The viscosity of the SA is 5000 mPa·s, and the pH value of a 1% aqueous solution thereof is 6-8.

5. The method for preparing a composite phase change material using dual network packaging according to claim 2, characterized in that: The GO has a thickness of 1-2 nm, a diameter of 15-20 μm, and a specific surface area of ​​300-350 m 2 / g, and the carbon content accounts for 51-55%.

6. The method for preparing a composite phase change material using dual network packaging according to claim 2, characterized in that: The molecular weight of VC is 176.12 g / mol, and the density at 20°C is 1.65 g / cm 3 .

7. The method for preparing a composite phase change material using dual network packaging according to claim 2, characterized in that: The thermal conductive filler is one or a combination of two or more of aluminum oxide, aluminum nitride and silicon micropowder.

8. The method for preparing a composite phase change material using dual network packaging according to claim 2, characterized in that: The nucleating agent is one or a combination of two or more of sodium succinate, aluminum adipate, and sodium cinnamate.

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