Photo-thermal driving shape memory type heat storage and temperature regulation phase change material as well as preparation method and application thereof

Abstract

The invention relates to the technical field of novel energy materials, in particular to a photo-thermal driving shape memory type heat storage and temperature regulation phase change material and a preparation method and application thereof, and the photo-thermal driving shape memory type heat storage and temperature regulation phase change material comprises a polyurethane phase change material and a photo-thermal conversion material; the polyurethane phase change material is prepared from polyether type polyol, polyester type polyol, isocyanate and small molecule polyol; wherein the molar ratio of the polyether type polyol to the polyester type polyol is 1: (1 to 1000), and the molecular weight of the polyether type polyol is 10000 to 900000; the photothermal conversion material comprises one or more of carbon-based materials such as graphene, graphene oxide and a carbon nano tube. The phase change material has the advantages of high enthalpy value, high strength, photothermal conversion performance, good flexibility and reversible shape memorability, simple preparation method and low cost, and can be widely used in the fields of artificial muscle fibers, heat storage and temperature regulation intelligent textiles, heat management and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy materials, and in particular to a photothermal driven shape memory heat storage temperature regulating phase change material and a preparation method and application thereof. Background Art

[0002] Phase change heat storage and temperature control technology uses phase change materials that absorb and release a large amount of latent heat as the medium. It has the advantages of high energy storage density, constant temperature during energy storage and release, and recyclable use. It can be widely used in solar energy storage, smart buildings, electronic equipment thermal control, battery thermal management and other fields. Among them, solid-solid phase change materials have no phase separation, small supercooling, small volume change, no leakage, no need for packaging, and are easy to process and shape. They are a type of phase change material worthy of vigorous development.

[0003] As an inexhaustible, clean, and environmentally friendly renewable energy, solar energy has great potential application value. However, solar radiation has the disadvantages of low energy density and being greatly affected by climate and seasons, which limits its direct application. Using photothermal conversion materials to absorb solar energy can achieve efficient utilization of solar energy. Using photothermal conversion phase change energy storage technology, it can not only effectively absorb solar heat and undergo phase transition, but also store solar energy, and release heat energy through the phase change process when needed, which can effectively alleviate the energy crisis and achieve efficient energy saving. Therefore, the development and utilization of photothermal driven phase change energy storage materials is of great significance for the efficient use of solar energy and solving the problem of energy shortage. In addition, phase change energy storage materials with photothermal driven shape memory can also use the stored light energy to drive shape changes and release energy at the same time in the case of power shortage, which has great potential application value in thermal management, smart textiles, and artificial muscles.

[0004] Patent CN202111292485.2 discloses a high thermal conductivity, low leakage photothermal conversion stereotyped phase change material and preparation method, which is polymerized with 4,4-dicyclohexylmethane diisocyanate as the hard segment material, polyethylene glycol of different molecular weights as the soft segment, and Ti3C2Tx and nano-CuS as photothermal conversion materials. This invention endows the stereotyped phase change material with high thermal conductivity and photothermal conversion properties through the high thermal conductivity of Ti3C2Tx and nano-CuS and the surface plasma resonance effect. HMDI constrains the PEG molecules to a certain extent, thereby effectively solving the leakage problem during use. However, the photothermal conversion performance, mechanical properties and shape memory of the phase change material obtained by this method are not mentioned, so it needs further research and improvement to meet the needs of various application scenarios.

[0005] Patent CN201810067001.6 discloses a photothermal conversion polyurethane energy storage film material, its preparation method and film. It is prepared from the following components: polyethylene glycol, oligomer polyether or polyester diol, diisocyanate, small molecule diol, dihydroxy dye; the molecular weight of the polyethylene glycol is 2000-20000; the molecular weight of the oligomer polyether or polyester diol is 500-3000; the dihydroxy dye contains two free active hydroxyl groups and can absorb visible light of 380-780nm. This invention uses the heat storage properties of the covalently bonded dye and the fixed phase change material to enable the film to have both photothermal conversion and thermal energy storage functions. However, its photothermal conversion performance is poor, and it does not have high elasticity and shape memory functions.

[0006] Therefore, it is necessary to provide an improved photothermal-driven shape memory heat storage temperature regulating phase change material to solve the above problems. Summary of the invention

[0007] The purpose of the present invention is to provide a photothermal driven shape memory heat storage temperature regulating phase change material and its preparation method and application. By in-situ compounding the photothermal conversion material with the improved polyurethane phase change material, its mechanical strength is significantly improved. At the same time, it has photothermal conversion ability and driven shape recovery function, as well as good flexibility and phase change enthalpy value.

[0008] To achieve the above-mentioned object, in a first aspect, the present invention provides a photothermal-driven shape memory heat storage and temperature regulating phase change material, comprising a polyurethane phase change material and a photothermal conversion material;

[0009] The synthetic raw materials of the polyurethane phase change material include polyether polyol, polyester polyol, isocyanate and small molecule polyol; wherein the molar ratio of the polyether polyol to the polyester polyol is 1:(1-1000), and the molecular weight of the polyether polyol is 10000-900000;

[0010] The photothermal conversion material (light absorbing material) includes one or more carbon-based materials such as graphene, graphene oxide, and carbon nanotubes.

[0011] The present invention found that by compounding a small amount of photothermal conversion carbon-based material into an improved homemade polyurethane phase change material, an ultra-high deformation shape memory heat storage and temperature regulating phase change material with photothermal conversion capability can be obtained. Its mechanical strength is significantly enhanced compared to the polyurethane phase change material, and it has higher photothermal conversion efficiency and storage capacity.

[0012] Among them, the improved self-made polyurethane phase change material of the present invention uses polyester polyol and polyether polyol with ultra-long molecular chain as polyurethane soft segment, reacts with diisocyanate, and by adjusting the content of each component, a polyurethane solid-solid phase change material with excellent flexibility can be obtained. After compounding carbon-based materials, the mechanical strength is significantly enhanced, and still maintains good flexibility.

[0013] Furthermore, the amount of the photothermal conversion material added is 0.1-3wt% of the mass of the polyurethane phase change material, preferably 0.5-1.5wt%; more preferably 1wt%. Its tensile strength can be increased by about 2 times compared with the polyurethane phase change material. Moreover, only a small amount of addition is required to achieve a photothermal conversion efficiency and storage capacity of more than 90%.

[0014] And / or, the light-to-heat conversion material at least includes graphene. Studies have found that graphene has better effects than graphene oxide or carbon nanotubes.

[0015] Furthermore, the molecular weight of the polyether polyol is 100,000-700,000, preferably 300,000-600,000, for example 300,000, 400,000, 500,000, 600,000; the molecular weight of the polyester polyol is 500-3,500, for example 800, 1,000, 2,000, 3,000, 3,500, etc., usually referring to the weight average molecular weight.

[0016] And / or, the molar ratio of the polyether polyol to the polyester polyol is 1:(100-1000), preferably 1:(200-700), and more preferably 1:400.

[0017] Furthermore, the addition amount of the small molecule polyol is 0.01%-0.3% of the total mass of the polyether polyol, polyester polyol and isocyanate; preferably 0.16%.

[0018] And / or, the small molecule polyol is one or more of D-sorbitol, D-mannitol, erythritol, xylitol, D-arabitol, and 1,4-butanediol.

[0019] Further, the polyether polyol includes one or more of polyethylene glycol, polypropylene glycol, polytetramethylene glycol, polyethylene oxide, polyoxypropylene glycol, and poly-1,4-oxytetramethylene glycol;

[0020] And / or, the polyester polyol includes one or more of polycaprolactone diol, polyadipate diol, polyethylene adipate diol, polypropylene adipate diol, polybutylene adipate diol, polyhexane adipate diol, polybutylene adipate diol, polyhexane adipate diol, polycarbonate diol, polyethylene phthalate diol, polyhexane phthalate diol, and polyneopentyl phthalate diol;

[0021] The isocyanate includes one or more of toluene diisocyanate, diphenylmethane diisocyanate, 4'4-dicyclohexylmethane diisocyanate, 1,5-naphthalene diisocyanate, p-phenylene diisocyanate, xylylene diisocyanate, 1,4-cyclohexane diisocyanate, hexamethylene diisocyanate, and isophorone diisocyanate.

[0022] In a second aspect, the present invention provides a method for preparing a photothermal-driven shape memory heat storage and temperature regulating phase change material as described in any one of the above, comprising: before the raw material of the polyurethane phase change material is completely polymerized, adding the photothermal conversion material, and after the polymerization is completed, obtaining the photothermal-driven shape memory heat storage and temperature regulating phase change material. In the present invention, adding the photothermal conversion material before the polymerization reaction is completed can improve the photothermal conversion efficiency and storage capacity, and help to obtain a phase change material with better comprehensive performance.

[0023] Further, the following steps are included:

[0024] S1, reacting polyester polyol with isocyanate under the action of a catalyst to obtain an isocyanate-terminated prepolymer 1;

[0025] S2, reacting the terminal isocyanate prepolymer 1 with a polyether polyol to obtain a terminal isocyanate prepolymer 2; the molecular weight of the polyether polyol is 10000-900000; the molar ratio of the polyether polyol to the polyester polyol is 1:(1-1000); preferably 1:(200-700);

[0026] S3. Continue to react the terminal isocyanate prepolymer II with the small molecule polyol for a preset time, then add the photothermal conversion material, and continue the reaction for 24-48 hours to obtain a photothermal driven shape memory energy storage temperature regulating phase change material.

[0027] Furthermore, in step S1, the catalyst is one or more of dibutyltin dilaurate, tetrabutyl titanate, tertiary amines, non-tin organic compounds, oleic acid, adipic acid, and potassium hydroxide.

[0028] Furthermore, the preparation method comprises the following steps:

[0029] S1. After drying the polyester polyol, add isocyanate, and under the protection of nitrogen atmosphere, continue stirring and reacting at 65-75° C. for 45-60 minutes, add a catalyst, and continue reacting for 60-120 minutes to obtain a terminal isocyanate prepolymer 1;

[0030] The isocyanate index is 0.95-1.05; the polyester polyol molecular weight is 500-3500;

[0031] S2, adding the dried polyether polyol to the terminal isocyanate prepolymer 1, stirring and reacting at 65-75° C. for 60-180 min to obtain the terminal isocyanate prepolymer 2;

[0032] S3, adding a small molecule polyol to the terminal isocyanate prepolymer 2, and continuously stirring and reacting at 75-85° C. for 60-120 min to obtain a polyurethane prepolymer;

[0033] S4. Add the photothermal conversion material to the polyurethane prepolymer, continue stirring the reaction at 25-40°C for 24-48 hours, and vacuum dry at 80°C to obtain a photothermal-driven shape memory heat storage and temperature regulating phase change material.

[0034] Ultra-high deformation heat storage and temperature regulating phase change materials are obtained by grafting polymerization and condensation polymerization. At the same time, carbon-based materials such as graphene are compounded by in-situ polymerization to give the materials photothermal conversion capabilities and achieve photothermal driven shape recovery.

[0035] In the third aspect, the present invention provides an application of the photothermally driven shape memory heat storage and temperature regulation phase change material as described in any one of the above items or the photothermally driven shape memory heat storage and temperature regulation phase change material obtained by the preparation method as described in any one of the above items, and the photothermally driven shape memory heat storage and temperature regulation phase change material is used in artificial muscle fibers, heat storage and temperature regulation intelligent textiles and thermal management fields.

[0036] The beneficial effects of the present invention are as follows:

[0037] 1. The photothermal driven shape memory heat storage and temperature regulating phase change material provided by the present invention can obtain a polyurethane solid-solid phase change material with excellent tensile strength and flexibility by in-situ compounding of the photothermal conversion material with the improved polyurethane phase change material, which can avoid leakage problems during the use of the material. The polyurethane phase change material has an adjustable phase change temperature within 60 to 70°C, and at the same time has high enthalpy value, high strength, photothermal conversion and driven shape recovery functions, good flexibility and reversible shape memory, can achieve multiple cycles and maintain shape stability, and has good thermal cycle durability.

[0038] 2. The preparation method of the present invention is simple and can be implemented in a variety of ways. It is low-cost, green and environmentally friendly, and suitable for industrial applications. The product has a wide range of heat storage and temperature regulation, stable physical properties, and stable flexibility and reversible shape memory. It can be used in artificial muscle fibers, heat storage and temperature regulation smart textiles, and thermal management. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 Thermal analysis diagram of the photothermal driven shape memory heat storage temperature regulating phase change material and the raw materials used prepared in Example 1;

[0041] Figure 2 The XRD spectra of the photothermal driven shape memory heat storage temperature regulating phase change material prepared in Example 1 and the raw materials used;

[0042] Figure 3 XRD spectra of the photothermal driven shape memory heat storage temperature regulating phase change material prepared in Example 1 at different temperatures;

[0043] Figure 4 The stress-strain curve and load-strain curve of the polyurethane phase change material and the photothermal driven shape memory heat storage temperature regulating phase change material prepared in Example 1;

[0044] Figure 5 The stress / load-strain change curve of the photothermal-driven shape memory heat storage temperature regulating phase change material prepared in Example 1 under the condition of changing stress;

[0045] Figure 6 The time-temperature curve of the polyurethane phase change material and the photothermal driven shape memory heat storage temperature regulating phase change material prepared in Example 1 as the illumination conditions change;

[0046] Figure 7 The stress-strain curve and load-strain curve of the photothermally driven shape memory heat storage and temperature regulating phase change material with different graphene addition amounts;

[0047] Figure 8 The photothermal conversion efficiency and storage capacity (η) of photothermal-driven shape memory heat storage and temperature-regulating phase change materials with different graphene addition amounts;

[0048] Fig. 9The stress-strain curves and load-strain curves of the photothermal-driven shape memory heat storage and temperature regulating phase change materials prepared in Examples 1, 5, and 6. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention is described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] Example 1

[0051] A photothermal driven shape memory heat storage temperature regulating phase change material is prepared by the following steps:

[0052] (1) 4 g of polycaprolactone diol (Mw=1000) was weighed and dried at 120° C. for 2 h, 0.73 g of HDI (hexamethylene diisocyanate) was added, and the mixture was reacted for 60 min in a nitrogen atmosphere at 75° C., and then dibutyltin dilaurate was added, and the mixture was reacted for 120 min at 75° C. to obtain a terminal isocyanate prepolymer;

[0053] (2) Weigh 6 g of polyethylene oxide (Mn = 600000), place it in an environment of 120° C. and dry it for 2 h, and then evenly disperse it in N,N-dimethylformamide solvent; after calculation, the molar ratio of polyethylene oxide to polycaprolactone diol is 1:400;

[0054] (3) adding a polyethylene oxide (also known as polyethylene oxide, Mn=600000) solution to the terminal isocyanate prepolymer obtained in step (1), and reacting at 75° C. for 180 min;

[0055] (4) weighing 0.02 g of D-sorbitol and adding it to the product of step (3), heating the system to 80° C., and continuing the reaction for 120 min to obtain a polyurethane prepolymer; then adding graphene, stirring and reacting at 25-40° C. for 24 h to obtain an ultra-high molecular weight graphene composite polyurethane solution; wherein the amount of graphene added is 1 wt% of the total mass of polycaprolactone diol, HDI, polyethylene oxide and D-sorbitol;

[0056] (5) The polyurethane solution obtained in step (4) is placed in a vacuum environment at 80° C. for curing and drying to obtain a photothermal-driven shape memory heat storage and temperature regulating phase change material.

[0057] from Figure 1It can be seen that the photothermal-driven shape memory heat storage and temperature-regulating phase change material prepared in this embodiment has a wide temperature regulation range and a high enthalpy value, showing good heat storage and temperature regulation performance. The melting temperature is 61.3°C, and the melting phase change enthalpy value is 105.2J / g; the crystallization temperature is 45°C, and the crystallization phase change enthalpy value is 105.0J / g. The polyurethane phase change material without graphene has a melting temperature of 61.3°C, a melting phase change enthalpy value of 110.3J / g, a crystallization temperature of 43.7°C, and a crystallization phase change enthalpy value of 108.0J / g.

[0058] from Figure 2 It can be seen that the photothermal driven shape memory heat storage temperature regulating phase change material prepared in this embodiment has good crystallization performance; Figure 3 It can be seen that the crystallization performance of photothermally driven shape memory heat storage and temperature regulating phase change materials can change the crystallization behavior with temperature changes. The crystallization is better at low temperatures. As the temperature rises, the phase change material gradually changes from a highly regular arrangement to an amorphous state.

[0059] from Figure 4 It can be seen that the tensile strength of the polyurethane phase change material without graphene is about 10.4MPa, and the elongation at break is about 1728.0%. At this time, the maximum force can reach 15.3N. The photothermal driven shape memory heat storage and temperature regulating phase change material prepared in this embodiment has a tensile strength of about 19.1MPa and an elongation at break of about 1544.3%. At this time, the maximum force can reach 87.6N, the mechanical strength is significantly improved, and it still has good flexibility. It can be seen that the present invention can have both high enthalpy value and better mechanical properties.

[0060] from Figure 5 It can be seen that the photothermal-driven shape memory heat storage and temperature-regulating phase change material prepared in this embodiment can undergo morphological changes as the load force is added and removed, and this change has cyclic stability.

[0061] from Figure 6 It can be seen that under the simulated sunlight source (100mW / cm 2 ), the temperature of the photothermal driven shape memory heat storage and temperature regulating phase change material prepared in this embodiment increases significantly under light, and the photothermal conversion efficiency and storage capacity (η) are 92.8%, which is much higher than that of the polyurethane phase change material without adding graphene.

[0062] Example 2

[0063] The difference from Example 1 is that the added amount of graphene is 0.5 wt %.

[0064] Example 3

[0065] The difference from Example 1 is that the added amount of graphene is 0.75 wt %.

[0066] Example 4

[0067] The difference from Example 1 is that the added amount of graphene is 1.5 wt %.

[0068] from Figure 7 It can be seen that by adding graphene, the tensile strength of polyurethane phase change materials is improved to varying degrees. When the amount of graphene added is too much or too little, the tensile strength is not significantly improved, and the elongation at break is significantly reduced. When the addition amount is 1.0wt%, the mechanical properties are optimal. Figure 8 It can be seen that with the increase of graphene addition, the photothermal conversion efficiency and storage capacity (η) first increase and then decrease.

[0069] Example 5

[0070] The difference from Example 1 is that graphene is replaced by graphene oxide.

[0071] Example 6

[0072] The difference from Example 1 is that graphene is replaced by carbon nanotubes.

[0073] from Fig. 9 It can be seen that when graphene oxide or carbon nanotubes are used, the tensile strength is also improved and the elongation at break is reduced. When various combinations of graphene, graphene oxide and carbon nanotubes are used, there are also different degrees of improvement.

[0074] Table 1 Enthalpy test results of Examples 1-6

[0075]

[0076] The present invention is a further improvement based on the homemade polyurethane phase change material. The raw material composition ratio of the polyurethane phase change material is not elaborated in this application. For details, please refer to patent CN202310510480.5, which is also applicable to this application. Only by adjusting the graphene content, the mechanical properties can be significantly improved, and the heat storage and temperature regulating phase change material with photothermal conversion driven deformation can be obtained.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A photothermal driven shape memory heat storage temperature regulating phase change material, characterized in that: Including polyurethane phase change materials and photothermal conversion materials; The raw materials of the polyurethane phase change material include polyether polyol, polyester polyol, isocyanate and small molecule polyol; wherein the molar ratio of the polyether polyol to the polyester polyol is 1:(1-1000), and the molecular weight of the polyether polyol is 10000-900000; The photothermal conversion material includes one or more of graphene, graphene oxide, and carbon nanotubes.

2. The photothermal driven shape memory heat storage temperature regulating phase change material according to claim 1, characterized in that: The amount of the photothermal conversion material added is 0.1-3wt% of the mass of the polyurethane phase change material, preferably 0.5-1.5wt%; And / or, the light-to-heat conversion material at least includes graphene.

3. The photothermal driven shape memory heat storage temperature regulating phase change material according to claim 1, characterized in that: The molecular weight of the polyether polyol is 100,000-700,000; preferably 300,000-600,000; the molecular weight of the polyester polyol is 500-3,500; And / or, the molar ratio of the polyether polyol to the polyester polyol is 1:(100-1000), preferably 1:(200-700).

4. The photothermal driven shape memory heat storage temperature regulating phase change material according to claim 1, characterized in that: The addition amount of the small molecule polyol is 0.01%-0.3% of the total mass of the polyether polyol, polyester polyol and isocyanate; And / or, the small molecule polyol is one or more of D-sorbitol, D-mannitol, erythritol, xylitol, D-arabitol, and 1,4-butanediol.

5. The photothermal driven shape memory heat storage temperature regulating phase change material according to claim 1, characterized in that: The polyether polyol includes one or more of polyethylene glycol, polypropylene glycol, polytetramethylene glycol, polyethylene oxide, polyoxypropylene glycol, and poly-1,4-oxytetramethylene glycol; And / or, the polyester polyol includes one or more of polycaprolactone diol, polyadipate diol, polyethylene adipate diol, polypropylene adipate diol, polybutylene adipate diol, polyhexane adipate diol, polybutylene adipate diol, polyhexane adipate diol, polycarbonate diol, polyethylene phthalate diol, polyhexane phthalate diol, and polyneopentyl phthalate diol; The isocyanate includes one or more of toluene diisocyanate, diphenylmethane diisocyanate, 4'4-dicyclohexylmethane diisocyanate, 1,5-naphthalene diisocyanate, p-phenylene diisocyanate, xylylene diisocyanate, 1,4-cyclohexane diisocyanate, hexamethylene diisocyanate, and isophorone diisocyanate.

6. A method for preparing a photothermal driven shape memory heat storage and temperature regulating phase change material according to any one of claims 1 to 5, characterized in that: include: Before the raw materials of the polyurethane phase change material are completely polymerized, the photothermal conversion material is added, and after the polymerization is completed, the photothermal driven shape memory heat storage temperature regulating phase change material is obtained.

7. The method for preparing the photothermal driven shape memory heat storage temperature regulating phase change material according to claim 6, characterized in that: The following steps are involved: S1, reacting polyester polyol with isocyanate under the action of a catalyst to obtain an isocyanate-terminated prepolymer 1; S2, reacting the terminal isocyanate prepolymer 1 with a polyether polyol to obtain a terminal isocyanate prepolymer 2; the molecular weight of the polyether polyol is 10000-900000; the molar ratio of the polyether polyol to the polyester polyol is 1:(1-1000); preferably 1:(200-700); S3. Continue to react the terminal isocyanate prepolymer II with the small molecule polyol for a preset time, then add the photothermal conversion material, and continue to react for 24-48 hours to obtain a photothermal driven shape memory energy storage temperature regulating phase change material.

8. The method for preparing the photothermal driven shape memory heat storage temperature regulating phase change material according to claim 7, characterized in that: In step S1, the catalyst is one or more of dibutyltin dilaurate, tetrabutyl titanate, tertiary amines, non-tin organic compounds, oleic acid, adipic acid, and potassium hydroxide.

9. The method for preparing the photothermal driven shape memory heat storage temperature regulating phase change material according to claim 7 or 8, characterized in that: The following steps are involved: S1. After drying the polyester polyol, add isocyanate, and under the protection of nitrogen atmosphere, continue stirring and reacting at 65-75° C. for 45-60 minutes, add a catalyst, and continue reacting for 60-120 minutes to obtain a terminal isocyanate prepolymer 1; The isocyanate index is 0.95-1.05; the polyester polyol molecular weight is 500-3500; S2, adding the dried polyether polyol to the terminal isocyanate prepolymer 1, stirring and reacting at 65-75° C. for 60-180 min to obtain the terminal isocyanate prepolymer 2; S3, adding a small molecule polyol to the terminal isocyanate prepolymer 2, and continuously stirring and reacting at 75-85° C. for 60-120 min to obtain a polyurethane prepolymer; S4. Add the photothermal conversion material to the polyurethane prepolymer, stir and react at 25-40°C for 24-48 hours, and then vacuum dry at 80°C to obtain a photothermal-driven shape memory heat storage and temperature regulating phase change material.

10. An application of the photothermal-driven shape memory heat storage and temperature regulating phase change material according to any one of claims 1 to 5 or the photothermal-driven shape memory heat storage and temperature regulating phase change material obtained by the preparation method according to any one of claims 6 to 9, characterized in that: The photothermal driven shape memory heat storage and temperature regulation phase change material is used in artificial muscle fibers, heat storage and temperature regulation intelligent textiles and thermal management fields.

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