A multifunctional solid-solid phase change material based on thiolactone chemistry and its preparation method and application

Abstract

The application discloses a multifunctional solid-solid phase change material based on thiolactone chemistry and a preparation method and application thereof, and relates to the technical field of high polymer materials.The method comprises the following steps: dissolving double bond functionalized thiolactone and acrylic ester in an organic solvent A, then adding a free radical initiator, and obtaining a polymer PTA through reaction; dissolving the PTA in an organic solvent B, then adding a fatty amine, a fatty acrylic ester and a crosslinking agent, uniformly mixing, and obtaining a mixed solution; and heating the mixed solution to 60-80 DEG C, and reacting for 1-2 hours, so as to obtain the solid-solid phase change material.The solid-solid phase change material prepared by the application exhibits the multifunctionalities of infrared invisibility, reversible anti-fake and shape memory, etc.The integration of these characteristics provides a broad prospect for the development of the next generation of high-performance intelligent materials.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high polymer materials, in particular to a multifunctional solid-solid phase change material based on thiolactone chemistry and a preparation method and application thereof. BACKGROUND

[0002] Phase change materials have attracted extensive attention due to their potential applications in thermal management, energy storage and smart surfaces. Traditional solid-liquid phase change materials cannot be directly used due to their high temperature leakage and the need for additional high-cost material packaging. Solid-solid phase change materials store thermal energy through direct reversible phase change of crystal (solid state) or semi-crystal phase and another amorphous (solid state), semi-crystal or crystal. They have the advantages of maintaining solid state characteristics during phase change, no liquid leakage, small volume change, no phase separation, and small supercooling degree, and are a kind of phase change material with development potential.

[0003] The solid-solid phase change materials currently being studied mainly include small molecule polyols, inorganic salts and polymers. Small molecule polyol phase change enthalpy is large, and the phase change temperature is moderate, but its cycle stability and mechanical properties are poor. The most prominent advantage of inorganic salt solid-solid phase change material is high phase change enthalpy and flame retardant property, but it is expensive and the preparation process pollutes the environment. The essence of polymer solid-solid phase change material is to incorporate solid-liquid phase change components into macromolecular skeletons through grafting, crosslinking, copolymerization and other methods. When the phase change component melts, the macromolecular skeleton restricts the molecular movement of the phase change component, so that the whole material remains solid. Polymer solid-solid phase change material has adjustable phase change enthalpy, suitable phase change temperature and certain mechanical strength, and is a truly usable solid-solid phase change material.

[0004] The main polymer solid-solid phase change material is polyethylene glycol and fatty acid. Among them, polyethylene glycol is used as a molecular soft segment, isocyanate is used as a molecular chain extender, and polyurethane is prepared by reaction. Fatty acid solid-solid phase change material is copolymerized with other monomers to prepare block copolymer. This kind of material has long preparation time, complex process and high toxicity of raw materials. Moreover, due to the characteristics of molecular structure, the urethane bond and carboxyl group are easy to absorb water, which limits their application in humid environment.

[0005] Therefore, it is of great significance to develop and design a solid-solid phase change material with simple preparation, low price, strong environmental adaptability and wide application for future thermal energy storage and thermal management field. SUMMARY

[0006] In view of the deficiencies in the above-mentioned background technology, the present invention mainly solves the problems that existing polymer-based solid-solid phase change materials are difficult to prepare and have poor environmental adaptability. The present invention provides a multifunctional solid-solid phase change material based on thiolactone chemistry, its preparation method and application. The polymer PTA prepared by this method contains a large number of thiolactone groups. Thiolactone can react with fatty amines to quickly open the ring, and the thiol groups released in situ can react with double bonds to undergo click reactions. Therefore, polymer PTA can quickly react with fatty amines and aliphatic acrylates to generate solid-solid phase change materials with a large number of aliphatic side groups. The presence of aliphatic side groups ensures its phase change ability while being hydrophobic, preventing water molecules from destroying the polymer network, so the material has good water and acid and alkali resistance.

[0007] The first object of the present invention is to provide a method for preparing a multifunctional solid-solid phase change material based on thiolactone chemistry, comprising the following steps:

[0008] The double-bond functionalized thiolactone and acrylate are dissolved in an organic solvent A, and a free radical initiator is added to react to obtain a polymer PTA;

[0009] Dissolve PTA in organic solvent B, then add fatty amine, aliphatic acrylate and cross-linking agent, mix well to obtain a mixed solution;

[0010] The mixed solution is heated to 60-80°C and reacted for 1-2 hours to obtain a solid-solid phase change material.

[0011] Preferably, the double bond functionalized thiolactone has the following structural formula:

[0012]

[0013] In the formula, X is an alkyl group or a heteroalkyl group.

[0014] Preferably, the double-bond functionalized thiolactone is prepared by reacting thiolactone hydrochloride with a double-bond acyl halide, and the synthesis route is as follows:

[0015]

[0016] Wherein, Z is a halogen element; X is an alkyl group or a heteroalkyl group.

[0017] Preferably, the molar ratio of the double-bond functionalized thiolactone to the acrylate is 1:0-0.3.

[0018] Preferably, the acrylate is ethyl acrylate, hydroxyethyl acrylate, n-butyl acrylate or hexyl acrylate; and the free radical initiator is azobisisobutyronitrile, dibenzoyl peroxide, dimethyl azobisisobutyrate or di-tert-butyl peroxide.

[0019] Preferably, the amount of the fatty amine added is 0.8-1.6 times that of PTA, the amount of the aliphatic acrylate added is 1.1-1.8 times that of PTA, and the amount of the crosslinking agent added is 0.1-0.6 times that of PTA;

[0020] Wherein, the fatty amine is one or more of dodecylamine, tetradecylamine, hexadecylamine and octadecylamine;

[0021] The aliphatic acrylate is one or more of tetradecyl acrylate, hexadecyl acrylate, and octadecyl acrylate;

[0022] The cross-linking agent is a diamine compound or a diamine polymer.

[0023] Preferably, the diamine compound is hexamethylenediamine or isophoronediamine; and the diamine polymer is polyetheramine 400, polyetheramine 800 or polyetheramine 2000.

[0024] Preferably, the organic solvent A is one or more of N,N-dimethylformamide, N,N-dimethylacetamide, dimethyl sulfoxide, dichloromethane, and 1,4-dioxane;

[0025] The organic solvent B is N,N-dimethylformamide and / or N,N-dimethylacetamide.

[0026] A second object of the present invention is to provide a multifunctional solid-solid phase change material based on thiolactone chemistry.

[0027] The third object of the present invention is to provide a multifunctional solid-solid phase change material based on thiolactone chemistry for application in the fields of energy storage, infrared stealth, shape memory or intelligent anti-counterfeiting.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The present invention provides a multifunctional solid-solid phase change material based on thiolactone chemistry, as well as a preparation method and application thereof. The present invention utilizes the easy ring-opening property of thiolactone to react a thiolactone copolymer with a fatty amine and an aliphatic acrylate. This allows for two-component grafting at the same site, ultimately producing a polymer containing a large number of aliphatic side groups. The aliphatic side groups crystallize in a solid state at room temperature and melt when heated. However, the polymer network restricts the free movement of the aliphatic side groups, allowing the material to maintain shape stability after phase change. At the same time, the large number of aliphatic side groups imparts a certain degree of hydrophobicity to the material, preventing water molecules from damaging the polymer network. Consequently, the material exhibits certain water and acid-base resistance.

[0030] The application can realize controllable adjustment of the material in phase change enthalpy 20-100 J / g, phase change temperature 30-70 DEG C, modulus 0.24-130 MPa and strength 0.3-2.7 MPa through the selection of the fatty amine and the fatty acrylate.

[0031] The solid-solid phase change material prepared by the application shows excellent water resistance, acid resistance and alkali resistance. The material can maintain mechanical properties and phase change enthalpy of >95% after being soaked in 0.01 mol / L HCl, H2O and 0.001 mol / L KOH for 12 h. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is the phase change enthalpy of the solid-solid phase change material provided in examples 1-4.

[0033] Figure 2 is the phase transition process of the solid-solid phase change material provided in examples 1-4.

[0034] Figure 3 is the mechanical property test of the solid-solid phase change material provided in examples 1-4 under the condition of 20 DEG C.

[0035] Figure 4 is the water resistance, acid resistance and alkali resistance of the solid-solid phase change material provided in example 2.

[0036] Figure 5 is the shape memory ability of the solid-solid phase change material provided in example 4.

[0037] Figure 6 is the infrared stealth performance of the solid-solid phase change material provided in examples 2-4 under sunlight.

[0038] Figure 7 is the human infrared stealth performance of the solid-solid phase change material provided in example 4.

[0039] Figure 8 is the synergistic reversible imaging ability of the solid-solid phase change material provided in examples 2 and 4.

[0040] Figure 9 is the phase change real object of comparative example 1. DETAILED DESCRIPTION

[0041] In order to enable the person skilled in the art to better understand the technical solutions of the application and implement the same, the application will be further described below in conjunction with specific examples and drawings, but the examples are not intended to limit the application.

[0042] The application aims to provide a multifunctional solid-solid phase change material based on thiolactone chemistry and a preparation method and application thereof, based on a biomass thiolactone, a thiolactone copolymer is synthesized. The copolymer can be in-situ grafted with a fatty amine and an aliphatic acrylate through ring opening of the thiolactone. Due to the presence of the macromolecular skeleton, the molecular movement of the fatty amine and the aliphatic acrylate is limited after phase change, so that the whole material remains solid. By selecting different fatty amines and aliphatic acrylates, the controllable adjustment of the phase change temperature and the phase change enthalpy in a wide range can be realized. The phase change temperature is 30-70 DEG C, and the phase change enthalpy is 20-100 J / g. In addition, the solid-solid phase change material also exhibits multifunctionalities such as infrared stealth, reversible anti-counterfeiting and shape memory. The integration of these characteristics provides a broad prospect for the development of the next generation of high-performance intelligent materials.

[0043] In order to achieve the above-mentioned purpose, the first aspect of the application provides a preparation method of a multifunctional solid-solid phase change material based on thiolactone chemistry, comprising the following steps:

[0044] The double bond functionalized thiolactone and the acrylate are dissolved in an organic solvent A, and then a free radical initiator is added, and a polymer PTA is obtained through reaction;

[0045] The PTA is dissolved in an organic solvent B, and then a fatty amine, an aliphatic acrylate and a crosslinking agent are added and uniformly mixed to obtain a mixed solution;

[0046] The mixed solution is heated to 60-80 DEG C, and reacted for 1-2 h to obtain the solid-solid phase change material.

[0047] In the examples, the double bond functionalized thiolactone and the acrylate are dissolved in an organic solvent A and reacted for 4 h, and then the obtained product is dissolved in an organic solvent B after purification, and then mixed with a fatty amine and an aliphatic acrylate and heated to obtain the solid-solid phase change material.

[0048] The application utilizes the easy ring opening characteristics of thiolactone to react the thiolactone copolymer with a fatty amine and an aliphatic acrylate. The grafting of the two components at the same site is realized, and finally the polymer contains a large number of aliphatic side groups.

[0049] The structure of the double bond functionalized thiolactone is as follows:

[0050]

[0051] In the formula, X is an alkyl group or a heteroalkyl group.

[0052] The double bond functionalized thiolactone is prepared by reacting a thiolactone hydrochloride with an acyl halide containing a double bond, and the synthetic route is as follows:

[0053]

[0054] Wherein, Z is a halogen element; X is an alkyl group or a heteroalkyl group.

[0055] The molar ratio of the double-bond functionalized thiolactone to the acrylate is 1:0.01-0.3.

[0056] The acrylate is ethyl acrylate, hydroxyethyl acrylate, n-butyl acrylate or hexyl acrylate; the free radical initiator is azobisisobutyronitrile, dibenzoyl peroxide, dimethyl azobisisobutyrate or di-tert-butyl peroxide.

[0057] The amount of the fatty amine added is 0.8-1.6 times that of PTA, the amount of the aliphatic acrylate added is 1.1-1.8 times that of PTA, and the amount of the crosslinking agent added is 0.1-0.6 times that of PTA.

[0058] Wherein, the fatty amine is one or more of dodecylamine, tetradecylamine, hexadecylamine and octadecylamine;

[0059] The aliphatic acrylate is one or more of tetradecyl acrylate, hexadecyl acrylate, and octadecyl acrylate;

[0060] The cross-linking agent is a diamine compound or a diamine polymer.

[0061] The diamine compound is hexamethylenediamine or isophoronediamine; and the diamine polymer is polyetheramine 400, polyetheramine 800 or polyetheramine 2000.

[0062] The organic solvent A is one or more of N,N-dimethylformamide, N,N-dimethylacetamide, dimethyl sulfoxide, dichloromethane, and 1,4-dioxane;

[0063] The organic solvent B is N,N-dimethylformamide and / or N,N-dimethylacetamide.

[0064] A second aspect of the present invention provides a multifunctional solid-solid phase change material based on thiolactone chemistry.

[0065] The third aspect of the present invention provides an application of a multifunctional solid-solid phase change material based on thiolactone chemistry in the fields of energy storage, infrared stealth, shape memory or intelligent anti-counterfeiting.

[0066] It should be noted that the experimental methods used in the present invention are all conventional methods unless otherwise specified; the reagents and materials used are all commercially available unless otherwise specified.

[0067] Example 1

[0068] (1) Dissolve 4.1000 g of acrylamide thiolactone and 0.768 g of butyl acrylate in 50 mL of N,N-dimethylformamide. Add 0.0082 g of azobisisobutyronitrile, bubble nitrogen for 30 min, and heat to 70°C for 5 h. The solution is evaporated to remove the solvent and the resulting product is precipitated in methanol. The precipitate is collected and dried.

[0069] (2) Dissolve 0.5 g of the above polymer in 1 g of N,N-dimethylformamide, add 0.445 g of tetradecylamine and 0.5478 g of tetradecyl acrylate. Pour the mixed solution into a polytetrafluoroethylene mold and heat to 80°C for 5 min.

[0070] (3) Add 0.3 g of polyetheramine 2000 to the above mixed solution and continue the reaction at 80 °C for 2 h to obtain the solid-solid phase change film PTA-C 14 -C 14 .

[0071] Example 2

[0072] (1) Dissolve 4.1000 g of acrylamide thiolactone and 0.768 g of butyl acrylate in 50 mL of N,N-dimethylformamide. Add 0.0082 g of azobisisobutyronitrile, bubble nitrogen for 30 min, and heat to 70°C for 5 h. The solution is evaporated to remove the solvent and the resulting product is precipitated in methanol. The precipitate is collected and dried.

[0073] (2) Dissolve 0.5 g of the above polymer in 1 g of N,N-dimethylformamide, add 0.445 g of tetradecylamine and 0.6113 g of hexadecyl acrylate. Pour the mixed solution into a polytetrafluoroethylene mold and heat to 60°C for 5 min.

[0074] (3) Add 0.3 g of polyetheramine 2000 to the above mixed solution and continue the reaction at 60 °C for 2 h to obtain the solid-solid phase change film PTA-C 14 -C 16 .

[0075] Example 3

[0076] (1) Dissolve 4.1000 g of acrylamide thiolactone and 0.768 g of butyl acrylate in 50 mL of N,N-dimethylformamide. Add 0.0082 g of azobisisobutyronitrile, bubble nitrogen for 30 min, and heat to 70°C for 5 h. The solution is evaporated to remove the solvent and the resulting product is precipitated in methanol. The precipitate is collected and dried.

[0077] (2) 0.5 g of the above polymer was dissolved in 1 g of N,N-dimethylformamide, 0.5366 g of hexadecylamine and 0.6113 g of hexadecyl acrylate were added. The mixed solution was poured into a polytetrafluoroethylene mold and warmed to 70°C, and reacted for 5 min.

[0078] (3) 0.3 g of polyetheramine 2000 was added to the above mixed solution, and the reaction was continued at 70°C for 2 h to obtain a solid-solid phase change film PTA-C. 16 -C 16 .

[0079] Example 4

[0080] (1) 4.1000 g of acrylamide thiolactone, 0.768 g of butyl acrylate was dissolved in 50 mL of N,N-dimethylformamide, and 0.0082 g of azobisisobutyronitrile was added, N2 was bubbled for 30 min, and the temperature was raised to 70°C and reacted for 5 h. The product obtained after the solvent was removed by rotary evaporation was precipitated in methanol, the precipitate was collected and dried.

[0081] (2) 0.5 g of the above polymer was dissolved in 1 g of N,N-dimethylformamide, 0.5989 g of octadecylamine and 0.6623 g of octadecyl acrylate were added. The mixed solution was poured into a polytetrafluoroethylene mold and warmed to 60°C, and reacted for 5 min.

[0082] (3) 0.3 g of polyetheramine 2000 was added to the above mixed solution, and the reaction was continued at 60°C for 2 h to obtain a solid-solid phase change film PTA-C. 18 -C 18 .

[0083] Example 5

[0084] (1) 10.2670 g of acrylamide thiolactone, 1.7418 g of hydroxyethyl acrylate was dissolved in 50 mL of N,N-dimethylformamide, and 0.0205 g of azobisisobutyronitrile was added, N2 was bubbled for 30 min, and the temperature was raised to 70°C and reacted for 5 h. The product obtained after the solvent was removed by rotary evaporation was precipitated in methanol, the precipitate was collected and dried.

[0085] (2) 0.5 g of the above polymer was dissolved in 1 g of N,N-dimethylformamide, 0.5989 g of octadecylamine and 0.6623 g of octadecyl acrylate were added. The mixed solution was poured into a polytetrafluoroethylene mold and warmed to 65°C, and reacted for 5 min.

[0086] (3) 0.12 g of polyetheramine 800 was added to the above mixed solution, and the reaction was continued at 65°C for 2 h to obtain a solid-solid phase change film PTA-C. 18 -C18 .

[0087] Example 6

[0088] (1) Dissolve 10.2670 g of acrylamide thiolactone and 1.7418 g of hydroxyethyl acrylate in 50 mL of N,N-dimethylformamide. Add 0.0205 g of azobisisobutyronitrile, bubble nitrogen for 30 min, and heat to 70°C for 5 h. The solution is evaporated to remove the solvent, and the resulting product is precipitated in methanol. The precipitate is collected and dried.

[0089] (2) Dissolve 0.5 g of the above polymer in 1 g of N,N-dimethylformamide, add 0.4445 g of tetradecylamine and 0.6051 g of hexadecyl acrylate. Pour the mixed solution into a polytetrafluoroethylene mold and heat to 60°C for 5 min.

[0090] (3) Add 0.06 g of polyetheramine 400 to the above mixed solution and continue the reaction at 60 °C for 2 h to obtain the solid-solid phase change film PTA-C 14 -C 16 .

[0091] Comparative Example 1

[0092] (1) Dissolve 1 g of octadecylamine, 1 g of octadecyl acrylate, and 0.5 g of polyetheramine 400 in 5 mL of N, N-dimethylformamide and heat the mixture to 80 °C.

[0093] (2) After the above substances are completely dissolved without phase separation, the solvent is evaporated at 80 °C to obtain a eutectic phase change material.

[0094] In order to illustrate the relevant properties of the solid-solid phase change material provided by the present invention, it is described in conjunction with the accompanying drawings.

[0095] Figure 1 The following are DSC curves for the solid-solid phase change materials provided in Examples 1-4. As can be seen from the figure, all materials absorb heat when heated and release heat when cooled. Furthermore, by adjusting the polymer side chain structure, phase change materials with phase transition temperatures of 30-70°C and phase transition enthalpies of 20-100 J / g can be obtained.

[0096] Figure 2 This is a physical diagram of the phase transition process of the solid-solid phase change material provided in Examples 1 to 4. The material gradually changes from an opaque film to a transparent film during the heating process, and there is no liquid leakage during the phase transition process.

[0097] Figure 3Mechanical property test of solid-solid phase change material provided by example 1~4 at 20℃. From the figure, it can be seen that by adjusting the side chain of the polymer, the material can be changed from hard to soft.

[0098] Figure 4 Mechanical property test of solid-solid phase change material provided by example 2 after being soaked in HCl solution with pH=3, NaOH solution with pH=10 and water for 2 h. Due to the large number of hydrophobic alkyl side chains in the polymer, the material exhibits excellent water resistance, acid resistance and alkali resistance.

[0099] Figure 5 Shape memory ability of solid-solid phase change material provided by example 4. The material undergoes phase transition after heating, and the polymer chain segment has a certain free movement ability. In this state, the material is given a new shape and quickly cooled, and the original network structure does not change, at this time the polymer is in a restricted crystallization state. When heated again, the polymer chain segment restores the movement ability, and the material restores the original shape.

[0100] Figure 6 Infrared stealth ability of solid-solid phase change material provided by example 2~4 under sunlight. When the target object and the phase change material are in the shade, the temperature of the material is similar to the ambient background temperature, and there is almost no image under the infrared camera. When the target object and the phase change material are under the sunlight at the same time, the target object absorbs the heat of the sunlight and quickly heats up, while the phase change material has a phase transition temperature similar to the ambient background temperature, so the temperature does not change during the heat absorption process, and the phase change material has no image under the infrared camera. In this state, the phase change material is placed above the target object, and the infrared radiation of the target object is absorbed by the phase change material, thereby realizing the infrared stealth of the target object under the sunlight.

[0101] Figure 7 Human infrared stealth ability of phase change material provided by example 4. Unlike the sunlight stealth of the target object, the human body as a heat source always has a temperature difference with the natural environment, so a very clear human image can be seen under the infrared camera. When the phase change material is placed on the palm, the phase change material absorbs the infrared heat radiation of the human body, so that the hidden part is equivalent to the background color under the infrared camera, thereby realizing the infrared stealth of the human body.

[0102] Figure 8 Synergistic reversible imaging ability of solid-solid phase change material provided by example 2 and example 4. By adjusting the side chain structure, solid-solid phase change materials with different phase transition temperatures are prepared. Place two materials according to a certain pattern, and when heated, the material with a lower phase transition temperature will first undergo a phase transition and become transparent, leaving a "1803" pattern on the glass plate. Continue to heat, and all materials will undergo a phase transition and become transparent, and the pattern disappears. When cooled, the "1803" pattern is displayed again due to the difference in crystallization temperature.

[0103] Figure 9 is a phase change physical object of Comparative Example 1. The material is a white solid at room temperature, and the material undergoes phase change after being heated to 60°C. Since there is no additional encapsulation, the solid-liquid phase change of the material causes the liquid to flow in a large area, losing shape stability.

[0104] The preferred embodiments and their effects are described. However, those skilled in the art who have the benefit of the present disclosure can make additional changes and modifications to these embodiments once they acquire the basic inventive concept. Therefore, the appended claims are intended to cover all such changes and modifications that fall within the scope of the present application.

[0105] Although embodiments of the present application have been shown and described, it would be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a multifunctional solid-solid phase change material based on thiolactone chemistry, characterized in that: The following steps are involved: The double-bond functionalized thiolactone and acrylate are dissolved in an organic solvent A, and a free radical initiator is added to react to obtain a polymer PTA; Dissolve PTA in organic solvent B, then add fatty amine, aliphatic acrylate and cross-linking agent, mix well to obtain a mixed solution; The mixed solution is heated to 60-80°C and reacted for 1-2 hours to obtain a solid-solid phase change material; The structural formula of the double bond functionalized thiolactone is as follows: Wherein, X is an alkyl group or a heteroalkyl group; The molar ratio of the double-bond functionalized thiolactone to the acrylate is 1:0-0.3; The acrylate is ethyl acrylate, hydroxyethyl acrylate, n-butyl acrylate or hexyl acrylate; the free radical initiator is azobisisobutyronitrile, dibenzoyl peroxide, dimethyl azobisisobutyrate or di-tert-butyl peroxide; The amount of the fatty amine added is 0.8-1.6 times that of PTA, the amount of the aliphatic acrylate added is 1.1-1.8 times that of PTA, and the amount of the crosslinking agent added is 0.1-0.6 times that of PTA; Wherein, the fatty amine is one or more of dodecylamine, tetradecylamine, hexadecylamine and octadecylamine; The aliphatic acrylate is one or more of tetradecyl acrylate, hexadecyl acrylate, and octadecyl acrylate; The cross-linking agent is a diamine compound or a diamine polymer; The diamine compound is hexamethylenediamine or isophoronediamine; and the diamine polymer is polyetheramine 400, polyetheramine 800 or polyetheramine 2000.

2. The method for preparing a multifunctional solid-solid phase change material based on thiolactone chemistry according to claim 1, characterized in that: The double-bond functionalized thiolactone is prepared by reacting thiolactone hydrochloride with a double-bond acyl halide. The synthesis route is as follows: Wherein, Z is a halogen element; X is an alkyl group or a heteroalkyl group.

3. The method for preparing a multifunctional solid-solid phase change material based on thiolactone chemistry according to claim 1, characterized in that: The organic solvent A is one or more of N,N-dimethylformamide, N,N-dimethylacetamide, dimethyl sulfoxide, dichloromethane, and 1,4-dioxane; The organic solvent B is N,N-dimethylformamide and / or N,N-dimethylacetamide.

4. A multifunctional solid-solid phase change material based on thiolactone chemistry prepared by the method according to any one of claims 1 to 3.

5. Application of the multifunctional solid-solid phase change material based on thiolactone chemistry according to claim 4 in the fields of energy storage, infrared stealth, shape memory or intelligent anti-counterfeiting.

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