High-enthalpy-value polyether-amine-based flexible shape-stabilized phase-change material, and preparation method therefor and use thereof

Abstract

The present invention belongs to the field of polymer phase-change energy storage materials. Disclosed are a high-enthalpy-value polyether-amine-based flexible shape-stabilized phase-change material, and a preparation method therefor and the use thereof. The phase-change heat storage material is made of a flexible polyether amine polymer network and an organic solid-liquid phase-change component loaded in the polymer network in situ, wherein the flexible polyether amine polymer network and the organic phase-change component have good compatibility, and organic phase-change molecules are wound around a polyether amine polymer chain to form a crystal domain having overall flexibility, thereby achieving an organic combination of a high heat storage capacity and flexibility. The problems of a low loading rate of the phase-change component and liquid leakage of the phase-change material are solved; moreover, the material is endowed with overall flexibility. The design and development of the high-enthalpy-value flexible shape-stabilized phase-change material have an important application value on the occasions of flexible wearables, heat management of electronic devices, etc.

Description

A high enthalpy polyetheramine-based flexible shape-fixing phase change material and its preparation method and application Technical Field

[0001] The invention relates to a high-enthalpy polyetheramine-based flexible shape-fixed phase change material, a preparation method and an application thereof, and belongs to the field of polymer phase change energy storage materials. Background Art

[0002] Phase-change latent heat storage technology, with its high thermal storage density and low application cost, can effectively address the temporal and spatial imbalance between thermal energy supply and demand. It has been widely used in applications such as peak shaving and valley shifting in the power industry, heating and insulation in the building industry, and temperature control and heat dissipation in electronic components. Organic solid-liquid phase change materials (SLPCMs) can store thermal energy as latent heat within their molecules through reversible phase transitions and release the stored heat when needed. This allows them to absorb and release large amounts of heat within a constant temperature range, effectively improving thermal energy utilization. However, SLPCMs have numerous limitations. Their high rigidity in the solid state limits their application, and leakage issues caused by their fluidity after phase transition have become a bottleneck restricting their further development (G. Wang, Z. Tang, Y. Gao, P. Liu, Y. Li, A. Li, X. Chen, Chem. Rev. 2023, 123, 6953-7024.). Technical issues

[0003] The development of flexible, shape-fixed phase-change materials (PCMs) has attracted considerable attention. Currently, these materials can achieve a certain degree of flexibility through methods such as melt blending and grafting of organic PCMs with polymers. Furthermore, improving their flexibility often requires subsequent processing such as hot pressing and thinning. Despite this, the challenges of high room temperature rigidity, resulting in brittleness and poor bending resistance, remain unresolved, necessitating urgent research and development. Technical Solutions

[0004] The present invention aims to solve the key problems of organic phase change materials, such as their high room temperature brittleness and poor bending resistance, and to construct a shape-fixed phase change heat storage material with high enthalpy and intrinsic flexibility. From the perspective of molecular structure design, the key to achieving its intrinsic flexibility is to design a polyetheramine polymer network with good flexibility and compatibility with phase change components. At the same time, the polyetheramine polymer network is in situ coated with an organic solid-liquid phase change component to develop an intrinsically flexible shape-fixed phase change heat storage material with a high phase change component loading rate. While solving the problems of low phase change material loading rate and phase change material leakage, the material is given good overall flexibility. The design and development of flexible, shape-fixed phase change materials with high enthalpy values ​​has important application value in flexible wearables and thermal management of electronic devices.

[0005] The present invention aims to provide a high-enthalpy intrinsically flexible phase-change thermal storage material. This phase-change material combines high thermal storage capacity with excellent flexibility and bending resistance, enabling stable and efficient long-term heat storage and temperature control, and has broad application prospects.

[0006] A high-enthalpy intrinsically flexible phase-change thermal storage material is constructed from an in-situ encapsulated flexible polyetheramine polymer network encapsulating organic phase-change molecules. The flexible polyetheramine polymer network exhibits excellent compatibility with the organic phase-change component, with the organic phase-change molecules wrapped around the polyetheramine polymer chains to form overall flexible crystalline domains, achieving an organic combination of high thermal storage capacity and flexibility. This material not only addresses the issues of low phase-change component loading and leakage, but also imparts overall compliant properties. The design and development of high-enthalpy, flexible, shape-fixed phase-change materials has important applications in flexible wearables and thermal management of electronic devices.

[0007] Furthermore, the flexible polyetheramine polymer network is a polymer having the following structural formula, where n is an integer of 10 to 1000.

[0008] Furthermore, the flexible polyetheramine polymer network of the present invention is formed by ring-opening polymerization of polyetheramine molecules and pentaerythritol tetraglycidyl ether molecules in an organic solvent, with the mass ratio of polyetheramine molecules to pentaerythritol tetraglycidyl ether being 3:1-10:1. The polyetheramine polymer chains are entangled to form a network structure and in-situ encapsulate the organic phase change component.

[0009] Preferably, the mass ratio of the polyetheramine to the organic solvent is 1:(5-10);

[0010] Preferably, the solvent is at least one of tetrahydrofuran, dioxane, petroleum ether, acetone, chloroform, carbon disulfide, benzene, toluene, nitrobenzene, chlorobenzene, cyclohexane, and n-hexane.

[0011] Preferably, the organic phase change component is at least one of fatty alcohols (dodecyl alcohol, tetradecyl alcohol, hexadecanol, octadecyl alcohol), fatty acids (dodecanoic acid, tetradecanoic acid, hexadecanoic acid, octadecanoic acid, eicosanoic acid), aliphatic hydrocarbons (dodecane, tetradecane, hexadecane, octadecane, eicosane), butyl stearate, methyl palmitate, methyl stearate, octadecyl thioglycolate, acetamide, phorone, polyethylene glycol, and polyvinyl alcohol.

[0012] When two organic phase change components are used, different fatty alcohols, fatty hydrocarbons and fatty acid molecules are mixed in a mass ratio of 1:1, such as a mass ratio of dodecanol to tetradecanol of 1:1, or a mass ratio of hexadecanol to tetradecanoic acid of 1:1, or a mass ratio of dodecane to hexadecanoic acid of 1:1, etc.;

[0013] Alternatively, butyl stearate, methyl palmitate, methyl stearate, octadecyl thioglycolate, acetamide, phorone, polyethylene glycol, and polyvinyl alcohol are mixed with different fatty alcohols, fatty hydrocarbons, and fatty acid molecules in a mass ratio of 1:1, for example, the mass ratio of butyl stearate to dodecane is 1:1, the mass ratio of methyl palmitate to tetradecanol is 1:1, the mass ratio of octadecyl thioglycolate to hexadecanoic acid is 1:1, and the mass ratio of octadecyl thioglycolate to hexadecanoic acid is 1:1.

[0014] Another object of the present invention is to provide a method for preparing the above-mentioned intrinsic flexible phase change heat storage material with high enthalpy value.

[0015] A method for preparing an intrinsically flexible phase-change heat storage material comprises the following steps:

[0016] preparing an organic dispersion system of polyetheramine molecules and pentaerythritol tetraglycidyl ether molecules;

[0017] Adding the phase change molecules into the dispersed system obtained in step ①, and in-situ loading the phase change components to obtain an organic prepolymer;

[0018] The prepolymer obtained in step ② is allowed to stand, the solvent is removed, and the prepolymer is heated and dried to obtain a flexible shape-fixed phase change material.

[0019] The intrinsically flexible phase change heat storage material described in the present invention achieves the preparation of a high enthalpy flexible phase change heat storage material by constructing a highly flexible polyetheramine polymer network to in-situ load organic phase change molecules, and utilizing the high flexibility of the flexible polyetheramine polymer network and its good compatibility with the organic phase change components.

[0020] In the above technical solution, in step ①, polyetheramine molecules and pentaerythritol tetraglycidyl ether molecules are dispersed in an organic solvent and mixed evenly by magnetic stirring. The mass ratio of the polyetheramine molecules to the pentaerythritol tetraglycidyl ether molecules is (3-10):1, and the mass ratio of the flexible polyetheramine polymer network to the organic solvent is 1:(5-10).

[0021] Furthermore, the magnetic stirring time is 3 to 12 h, the system temperature is preferably 30° C., and the rotation speed is preferably 1000 r / min.

[0022] In the above technical solution, in step ②, the phase change component is added to the mixed system obtained in step ①, and magnetic stirring is performed to mix them evenly; under heating conditions, the polyetheramine molecules and pentaerythritol tetraglycidyl ether molecules undergo a ring-opening polymerization reaction in the organic dispersion system to generate a polyetheramine polymer network and in-situ load the phase change molecules to prepare an organic prepolymer.

[0023] Furthermore, during the reaction, the heating temperature is preferably 40° C.; the reaction time is preferably 9 to 12 h; and the rotation speed is preferably 800 r / min.

[0024] In the above technical solution, in step ③, the obtained prepolymer is allowed to stand at room temperature, the solvent is removed, and then heated and dried to obtain a flexible shape-fixed phase change material.

[0025] Furthermore, the standing temperature is room temperature, the standing time is preferably 10 to 24 hours; the heating temperature is preferably 120° C.; and the drying time is preferably 8 to 12 hours.

[0026] Furthermore, intrinsically flexible phase change heat storage materials with high enthalpy values ​​have important application value in flexible smart fabrics or thermal management of electronic devices. Beneficial effects

[0027] This phase-change thermal storage material is composed of a flexible polyetheramine polymer network and an organic solid-liquid phase-change component in situ loaded within the polymer network. The flexible polyetheramine polymer network and the organic phase-change component exhibit excellent compatibility, with the organic phase-change molecules wrapping around the polyetheramine polymer chains to form overall flexible crystalline domains, achieving an organic combination of high thermal storage capacity and flexibility.

[0028] This invention, based on the flexible design of molecular structures, produces a polyetheramine polymer network with excellent compliance and in-situ loading of phase change components, achieving the construction of a flexible backbone network and its composite with phase change materials. This effectively addresses the key challenges of organic phase change materials, such as high room temperature brittleness and poor bending resistance, while maintaining high energy storage density and excellent flexibility.

[0029] The intrinsically flexible phase-change thermal storage material of this invention solves the problems of low phase-change component loading and phase-change material leakage while imparting overall flexibility to the material, resulting in high phase-change component loading and excellent room-temperature compliance. The phase-change operating temperature range of the material can be regulated through the targeted selection of organic phase-change energy storage materials, offering broad application prospects in the fields of temperature control and heat dissipation for electronic devices and building energy conservation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] FIG1 is a digital photograph of the intrinsic flexible phase change heat storage material in Example 1 in different bending and folding states.

[0031] FIG2 is a comparison diagram of the shaping effects of hexadecanol (I) and the flexible shape-setting phase change material (II) in Example 1.

[0032] FIG3 is a DSC graph of the intrinsic flexible phase change heat storage material with different loading amounts described in Example 1.

[0033] FIG4 is a DSC graph of the intrinsic flexible phase change heat storage material described in Example 1 before and after the thermal cycle test.

[0034] FIG5 is a thermogravimetric analysis test result of the intrinsic flexible phase change heat storage material described in Example 1. Best Mode for Carrying Out the Invention

[0035] Example 1

[0036] 1. Disperse 0.6 g of pentaerythritol tetraglycidyl ether and 2.4 g of polyetheramine in 18.0 g of toluene. Stir under magnetic heating at 1000 r / min for 6 h to make the system homogeneous and stable.

[0037] 2. Under magnetic stirring at 800 r / min, add 7.0 g of hexadecanol to the system obtained in step (1), and react at 40 °C for 12 h to obtain an organic prepolymer;

[0038] 3. The above system was allowed to stand at room temperature for 24 h and then dried at 120 °C for 12 h to obtain a polyetheramine-based flexible shape-fixed phase change material with a phase change component loading rate of 70% (denoted as: 70% FPCMs).

[0039] Figure 1 is a digital photo of the prepared intrinsic flexible phase change heat storage material in different bending and folding states. The flexible phase change material has no creases after folding at room temperature and has good flexibility and bending resistance.

[0040] The shaping effect of the flexible phase change heat storage material was tested at 80°C. Figure 2 shows that the obtained flexible phase change heat storage material has excellent shape stability and no leakage occurs at 80°C. The hexadecanol molecules change into a flowable liquid during the heating process.

[0041] By using the above preparation method, by adding different amounts of hexadecanol, polyetheramine-based flexible shape-fixed phase change materials with hexadecanol loadings of 50%, 80% and 90% were obtained, which were respectively recorded as 50% FPCMs, 80% FPCMs and 90% FPCMs.

[0042] The flexible phase change heat storage material and hexadecanol were tested by DSC using differential scanning calorimetry. The results are shown in the DSC curve in Figure 3. 50% FPCMs, 70% FPCMs, 80% FPCMs, and 90% FPCMs represent polyetheramine-based flexible shape-fixed phase change materials with different hexadecanol loadings, respectively. The enthalpy value of the polyetheramine-based flexible shape-fixed phase change material increases with the increase of the loading rate of the phase change component hexadecanol. The phase change enthalpy value of the flexible phase change heat storage material is between 100 and 180 J / g, and its phase change performance is adjustable, which provides a guarantee for practical application.

[0043] The cyclic performance of the composite phase change material was tested. The results, shown in Figure 4, show no significant decrease in enthalpy after 200 thermal cycles, indicating stable energy storage performance. Furthermore, Figure 5 shows the thermogravimetric analysis results of the flexible phase change thermal storage material, demonstrating excellent thermal stability and no thermal decomposition at 150°C. Modes for Carrying Out the Invention

[0044] Examples 2-14

[0045] The hexadecanol in Example 1 was replaced with dodecanol, tetradecanol, octadecanol, dodecane, tetradecane, hexadecane, octadecane, eicosane, dodecanoic acid, tetradecanoic acid, hexadecanoic acid, octadecanoic acid, and eicosanoic acid to obtain composite flexible phase change thermal storage materials with different fatty alcohol, fatty hydrocarbon, and fatty acid groups. Other conditions were the same as in Example 1. The resulting composite phase change materials had good thermal storage performance and room temperature compliance.

[0046] Example 15

[0047] 1. Disperse 0.6 g of pentaerythritol tetraglycidyl ether and 2.4 g of polyetheramine in 18.0 g of toluene. Stir under magnetic heating at 1000 r / min for 6 h to make the system homogeneous and stable.

[0048] 2. Under magnetic stirring at 800 r / min, add 3.5 g of hexadecanol and 3.5 g of tetradecanol to the system obtained in step (1), and react at 40 °C for 12 h to obtain an organic prepolymer;

[0049] 3. The above system was allowed to stand at room temperature for 24 h and dried at 120 °C for 12 h to obtain a polyetheramine-based flexible shape-fixed phase change material with a phase change component loading rate of 70%.

[0050] Examples 16-46

[0051] The hexadecanol in Example 1 is replaced by: dodecanol and tetradecanol, dodecanol and hexadecanol, dodecanol and octadecane, dodecanol and tetradecanol, dodecanol and hexadecanol, dodecanol and octadecane, dodecanol and eicosane, dodecanol and dodecanoic acid, dodecanol and tetradecanol, dodecanol and hexadecanoic acid, dodecanol and octadecane, dodecanol and eicosane, tetradecanol and hexadecanol, tetradecanol and octadecane, tetradecanol and dodecane, tetradecanol and tetradecanol, tetradecanol and hexadecanol, tetradecanol and octadecane, tetradecanol and eicosane, tetradecanol and dodecanoic acid, tetradecanol and tetradecanol , Tetradecyl alcohol and hexadecanoic acid, Tetradecyl alcohol and octadecanoic acid, Tetradecyl alcohol and eicosanoic acid, Hexadecanol and octadecane, Hexadecanol and dodecane, Hexadecanol and tetradecane, Hexadecanol and hexadecane, Hexadecanol and octadecane, Hexadecanol and eicosanoic acid, Hexadecanol and dodecanoic acid, Hexadecanol and tetradecanoic acid, Hexadecanol and hexadecanoic acid, Hexadecanol and octadecane, Hexadecanol and eicosanoic acid, octadecyl alcohol and dodecane, octadecyl alcohol and tetradecane, octadecyl alcohol and hexadecane, octadecyl alcohol and octadecane, octadecyl alcohol and eicosanoic acid, octadecyl alcohol and dodecanoic acid, octadecyl alcohol and tetradecyl alcohol ...yl alcohol and eicosanoic acid, dodecane and tetradecane, dodecane and hexadecane, dodecane and octadecane, dodecane and eicosanoic acid, dodecane and tetradecane, dodecane and hexadecane, dodecane and octadecane, dodecane and eicosanoic acid, tetradecane and hexadecane, tetradecane and octadecane, tetradecane and eicosanoic acid, tetradecane and tetradecane, tetradecane and hexadecane, tetradecane and octadecane, tetradecane and eicosanoic acid, hexadecane and octadecane, hexadecane and eicosanoic acid, hexadecane and octadecane, hexadecane and eicosanoic acid, hexadecane and dodecanoic acid, hexadecane and tetradecane, hexadecane and hexadecanoic acid, hexadecane and octadecane , hexadecane and eicosanoic acid, octadecane and eicosanoic acid, octadecane and dodecanoic acid, octadecane and tetradecanoic acid, octadecane and hexadecanoic acid, octadecane and octadecanoic acid, octadecane and eicosanoic acid, eicosanoic acid and dodecanoic acid, dodecanoic acid and tetradecanoic acid, dodecanoic acid and hexadecanoic acid, dodecanoic acid and octadecanoic acid, dodecanoic acid and eicosanoic acid, tetradecanoic acid and hexadecanoic acid, tetradecanoic acid and octadecanoic acid, tetradecanoic acid and eicosanoic acid, hexadecanoic acid and octadecanoic acid, hexadecanoic acid and eicosanoic acid, octadecanoic acid and eicosanoic acid, according to a mass ratio of 1:1, a polyetheramine-based flexible shape-fixing phase change material is obtained by compounding, and other conditions are the same as in Example 1. The obtained composite phase change material has good heat storage performance and room temperature compliance.

[0052] Example 47

[0053] 1. Disperse 0.6 g of pentaerythritol tetraglycidyl ether and 2.4 g of polyetheramine in 18.0 g of toluene. Stir under magnetic heating at 1000 r / min for 6 h to make the system homogeneous and stable.

[0054] 2. Under magnetic stirring at 800 r / min, add 7.0 g of butyl stearate to the system obtained in step (1), and react at 40 °C for 12 h to obtain an organic prepolymer;

[0055] 3. The above system was allowed to stand at room temperature for 24 h and dried at 120 °C for 12 h to obtain a polyetheramine-based flexible shape-fixed phase change material with a phase change component loading rate of 70%.

[0056] Examples 48-60

[0057] The hexadecanol in Example 1 was replaced with butyl stearate, which was mixed with dodecyl alcohol, tetradecyl alcohol, octadecanol, dodecane, tetradecane, hexadecane, octadecane, eicosane, dodecanoic acid, tetradecanoic acid, hexadecanoic acid, octadecanoic acid, and eicosanoic acid in a ratio of 1:1 to obtain a polyetheramine-based flexible shape-fixing phase change material. Other conditions were the same as in Example 1. The resulting composite phase change material had good heat storage performance and room temperature compliance.

[0058] Example 61

[0059] 1. Disperse 0.6 g of pentaerythritol tetraglycidyl ether and 2.4 g of polyetheramine in 18.0 g of toluene. Stir under magnetic heating at 1000 r / min for 6 h to make the system homogeneous and stable.

[0060] 2. Under magnetic stirring at 800 r / min, add 7.0 g of methyl stearate to the system obtained in step (1), and react at 40 °C for 12 h to obtain an organic prepolymer;

[0061] 3. The above system was allowed to stand at room temperature for 24 h and dried at 120 °C for 12 h to obtain a polyetheramine-based flexible shape-fixed phase change material with a phase change component loading rate of 70%.

[0062] Examples 62-74

[0063] The hexadecanol in Example 1 was replaced with methyl stearate and mixed with dodecanol, tetradecanol, octadecane, tetradecane, hexadecane, octadecane, eicosane, dodecanoic acid, tetradecanoic acid, hexadecanoic acid, octadecanoic acid, and eicosanoic acid in a ratio of 1:1 to obtain a polyetheramine-based flexible shape-fixing phase change material. Other conditions were the same as in Example 1. The obtained composite phase change material has good heat storage performance and room temperature compliance.

[0064] Example 75

[0065] 1. Disperse 0.6 g of pentaerythritol tetraglycidyl ether and 2.4 g of polyetheramine in 18.0 g of toluene. Stir under magnetic heating at 1000 r / min for 6 h to make the system homogeneous and stable.

[0066] 2. Under magnetic stirring at 800 r / min, add 7.0 g of methyl palmitate to the system obtained in step (1), and react at 40 °C for 12 h to obtain an organic prepolymer;

[0067] 3. The above system was allowed to stand at room temperature for 24 h and dried at 120 °C for 12 h to obtain a polyetheramine-based flexible shape-fixed phase change material with a phase change component loading rate of 70%.

[0068] Examples 76-88

[0069] The hexadecanol in Example 1 was replaced with methyl palmitate and mixed with dodecanol, tetradecanol, octadecanol, dodecane, tetradecane, hexadecane, octadecane, eicosane, dodecanoic acid, tetradecanoic acid, hexadecanoic acid, octadecanoic acid, and eicosanoic acid in a ratio of 1:1 to obtain a polyetheramine-based flexible shape-fixing phase change material. Other conditions were the same as in Example 1. The obtained composite phase change material has good heat storage performance and room temperature compliance.

[0070] Example 89

[0071] 1. Disperse 0.6 g of pentaerythritol tetraglycidyl ether and 2.4 g of polyetheramine in 18.0 g of toluene. Stir under magnetic heating at 1000 r / min for 6 h to make the system homogeneous and stable.

[0072] 2. Under magnetic stirring at 800 r / min, add 7.0 g of octadecyl thioglycolate to the system obtained in step (1), and react at 40 °C for 12 h to obtain an organic prepolymer;

[0073] 3. The above system was allowed to stand at room temperature for 24 h and dried at 120 °C for 12 h to obtain a polyetheramine-based flexible shape-fixed phase change material with a phase change component loading rate of 70%.

[0074] Examples 90-102

[0075] The hexadecanol in Example 1 was replaced with octadecyl thioglycolate, which was then mixed with dodecanol, tetradecanol, octadecane, tetradecane, hexadecane, octadecane, eicosane, dodecanoic acid, tetradecanoic acid, hexadecanoic acid, octadecanoic acid, and eicosanoic acid in a 1:1 ratio to obtain a polyetheramine-based flexible shape-fixing phase change material. Other conditions were the same as in Example 1. The resulting composite phase change material had good heat storage performance and room temperature compliance. Industrial Applicability

[0076] This phase-change thermal storage material is composed of a flexible polyetheramine polymer network and an organic solid-liquid phase-change component in situ loaded within the polymer network. The flexible polyetheramine polymer network exhibits excellent compatibility with the organic phase-change component. The organic phase-change molecules wrap around the polyetheramine polymer chains, forming crystalline domains with overall flexibility, achieving an organic combination of high thermal storage capacity and flexibility. This solves the problems of low phase-change component loading and leakage in the phase-change material while also imparting overall compliant properties. The design and development of high-enthalpy, flexible, shape-fixed phase-change materials has important applications in flexible wearables and thermal management of electronic devices. Sequence Listing Free Content

[0077] none.

Claims

1. A high enthalpy polyetheramine-based flexible shape-fixing phase change material, characterized in that: The phase change material comprises a flexible polyetheramine polymer network, which is a polymer having the following structural formula: ； Where n is an integer ranging from 10 to 1000.

2. The material according to claim 1, characterized in that: The phase-change heat storage material consists of a flexible polyetheramine polymer network and an organic solid-liquid phase-change material in situ loaded in the polymer network.

3. The material according to claim 2, characterized in that: The mass ratio of the flexible polyetheramine polymer network to the phase change material is 1:2-1:

8.

4. The material according to claim 1, characterized in that: The flexible polyetheramine polymer network is formed by polymerization reaction of polyetheramine and pentaerythritol tetraglycidyl ether in a solvent, and the mass ratio of polyetheramine to pentaerythritol tetraglycidyl ether is 3:1-10:

1.

5. The material according to claim 4, characterized in that: The mass ratio of the polyetheramine to the solvent is 1:(5-10), and the solvent is at least one of tetrahydrofuran, dioxane, petroleum ether, acetone, chloroform, carbon disulfide, benzene, toluene, nitrobenzene, chlorobenzene, cyclohexane, and n-hexane.

6. The material according to claim 2, characterized in that: The organic solid-liquid phase change material is at least one of dodecanol, tetradecanol, hexadecanol, octadecanoic acid, dodecanoic acid, tetradecanol, hexadecanoic acid, octadecanoic acid, eicosanoic acid, dodecane, tetradecane, hexadecane, octadecane, eicosane, butyl stearate, methyl palmitate, methyl stearate, octadecyl thioglycolate, acetamide, phorone, polyethylene glycol, and polyvinyl alcohol.

7. A method for preparing a high enthalpy polyetheramine-based flexible shape-fixing phase change material according to any one of claims 1 to 6, characterized in that: The process includes the following steps: ①Preparing an organic dispersion system of polyetheramine molecules and pentaerythritol tetraglycidyl ether molecules; ② Adding the solid-liquid phase change material to the above-obtained dispersed system, in-situ loading the phase change component, and obtaining an organic prepolymer; ③ The organic prepolymer is allowed to stand, the solvent is removed, and the heated and dried to obtain a flexible shaped phase change material.

8. A high enthalpy polyetheramine-based flexible shape-fixing phase change material according to any one of claims 1 to 6, characterized in that: The phase change material is applied in a flexible thermal management device.

9. A high enthalpy polyetheramine-based flexible shape-fixing phase change material according to any one of claims 1 to 6, characterized in that: The phase change material is applied to flexible intelligent fabrics.

10. A high enthalpy polyetheramine-based flexible shape-fixing phase change material according to any one of claims 1 to 6, characterized in that: The phase change material is applied to temperature-regulating and energy-saving building materials.

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