Nanocomposite eucommia ulmoides gum shape memory material and preparation method thereof

Abstract

The application relates to a nanocomposite eucommia rubber shape memory material and a preparation method thereof, and belongs to the technical field of high polymer materials. The application aims to solve the technical problems of insufficient shape memory performance of the existing eucommia rubber-based material, easy agglomeration of nanofillers and weak interface combination. X The application is prepared by the following steps: mixing a chemically modified Ti3C2T X with eucommia rubber and a plasticizer to prepare nanocomposite masterbatch, dynamically vulcanizing the nanocomposite masterbatch with a bismaleimide dynamic covalent crosslinking agent at 125-135 DEG C to construct a Diels Alder reversible topological crosslinking network, and finally performing mold forming to obtain the nanocomposite eucommia rubber shape memory material. The obtained material has the balance of strength and toughness, the shape fixing rate is greater than or equal to 97.8%, the recovery rate is greater than or equal to 96.5%, the thermal response recovery time is less than or equal to 10 seconds, the self-repairing efficiency is more than 70%, and the material has repeatable processability.

Description

Technical Field

[0001] This invention belongs to the field of polymer materials technology, and relates to a nanocomposite Eucommia ulmoides gum shape memory material and its preparation method. Background Technology

[0002] Eucommia ulmoides gum, as a unique bio-based trans-polyisoprene rubber, exhibits shape memory potential due to its inherent crystallization-melt transition characteristics and possesses excellent biocompatibility, making it a promising smart material at the intersection of the "new materials industry" and the "bio-industry." However, existing Eucommia ulmoides gum-based materials and technologies have significant drawbacks, severely limiting their application in high-value-added strategic emerging industries: pure Eucommia ulmoides gum has insufficient shape memory properties (such as recovery rate, recovery speed, and cycle stability); while simple blending with traditional fillers (such as carbon black) can improve some mechanical properties, it often sacrifices the material's toughness, transparency, or biocompatibility, and cannot impart the required remote controllability or multiple response capabilities; unmodified high-end nanomaterials (such as graphene) are prone to agglomeration in the matrix, resulting in weak interfacial bonding, low reinforcement efficiency, and unstable performance. Therefore, there is an urgent need for an innovative solution for Eucommia ulmoides gum-based composite materials that can fundamentally solve the interfacial problems and simultaneously achieve high strength, high toughness, and good processability. Summary of the Invention

[0003] In view of this, there is an urgent need for an innovative solution to fundamentally solve the interface problem and simultaneously achieve high strength, high toughness, and good processability of Eucommia ulmoides gum-based composite materials. The purpose of this invention is to provide a nanocomposite Eucommia ulmoides gum shape memory material and its preparation method.

[0004] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a nanocomposite Eucommia ulmoides gum shape memory material, characterized in that it comprises the following components: 20-40 parts by weight of matrix rubber, 5-20 parts by weight of modified nano-reinforcing body, 5-15 parts by weight of surface modifier, 1-5 parts by weight of dynamic covalent crosslinking agent, 1-5 parts by weight of compound providing furan groups, 3-10 parts by weight of plasticizer, and 200-500 parts by weight of solvent. The matrix rubber is natural trans-1,4-polyisoprene from Eucommia ulmoides gum. The modified nanoreinforcement is modified Ti3C2T. X Nano-reinforcement; The surface modifier is a silane coupling agent γ-aminopropyltriethoxysilane; The dynamic covalent crosslinking agent is bismaleimide (BMI). The compound that can provide furan groups is furfurylamine; The plasticizer is epoxidized soybean oil; The solvent is one or more of deionized water and anhydrous ethanol; Furthermore, the preparation method of the aforementioned nanocomposite Eucommia ulmoides gum shape memory material includes the following steps: S1: Chemical modification of nano-reinforcement: Weigh 5-20 parts by weight of MXene (Ti3C2T) X Disperse in 200-500 parts by weight of deionized water and sonicate for 1-3 hours to form a uniform dispersion; The MXene (Ti3C2T) X Modification method: Add γ-aminopropyltriethoxysilane, a silane coupling agent, to the dispersion, and react with magnetic stirring at 60-80℃ for 6-12 hours. After the reaction, centrifuge, wash, and dry to obtain modified Ti3C2T with amino groups on the surface. X Nano-reinforcement; S2: Preparation of nanocomposite masterbatch: The modified Ti3C2T prepared in step S1 X The nano-reinforcing material, along with 20-40 parts by weight of Eucommia ulmoides gum and 3-10 parts by weight of plasticizer, is added to an internal mixer and premixed at 80-100℃ for 15-30 minutes to prepare a nano-composite masterbatch with uniformly dispersed nanomaterials. S3: Dynamic Sulfation and Topology Network Construction: Add 60-80 parts by weight of Eucommia ulmoides gum, the nanocomposite masterbatch obtained in step S2, and 1-5 parts by weight of dynamic covalent crosslinking agent and furan group provider to a two-roll mill, and melt blend and dynamically vulcanize at a roller temperature of 125-135℃ for 15-30 minutes to prepare a dynamic covalent topological crosslinking network material. S4: Molding and Post-processing: The uniformly mixed dynamic covalent topological cross-linked network material in step S3 is molded in a hot press at 130-140℃ and 10-15MPa pressure for 5-15 minutes, and then cooled and demolded to obtain the nanocomposite Eucommia ulmoides gum shape memory material. Preferably, in step S1, the mass of the silane coupling agent γ-aminopropyltriethoxysilane accounts for 1-5% of the dispersion; Preferably, in step S2, the plasticizer is epoxidized soybean oil; Preferably, in step S3, the dynamic covalent crosslinking agent is bismaleimide (BMI). Preferably, the compound providing the furan group is furfurylamine; Furthermore, the nanocomposite Eucommia ulmoides gum shape memory material prepared by the aforementioned preparation method.

[0005] The beneficial effects of this invention are as follows: 1. Strong and tough mechanical properties: Through chemically modified nano-reinforcement and dynamic covalent topological network construction, stress is efficiently transferred at the interface, which greatly improves the strength of the material (2-3 times higher than pure rubber) while maintaining excellent elongation at break.

[0006] 2. Excellent and controllable shape memory performance: The dynamic covalent network provides a precisely adjustable recovery driving force and fixation capability, enabling the material to have a high shape fixation rate and a high recovery rate, and the recovery speed is significantly accelerated.

[0007] 3. Inherent self-healing and reprocessability: Based on the reversibility of the Diels-Alder reaction, the material can achieve network rearrangement under specific conditions, effectively repair internal damage, extend service life, and has the potential for thermally reversible processing, which is in line with the concept of green manufacturing.

[0008] 4. The process is feasible and has broad application prospects: the preparation process is compatible with the existing rubber industry and is easy to scale up for production. The material has clear and significant application value in strategic emerging industries such as flexible robots, intelligent medical devices, and integrated adaptive sensing and actuation devices.

[0009] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0010] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein: Figure 1 Macroscopic morphology images of dumbbell-shaped specimens of two nano-modified Eucommia ulmoides gum composite materials with different color markings prepared in this invention; Figure 2 The image shows the state of the dumbbell-shaped sample of the nanocomposite Eucommia ulmoides gum shape memory material prepared in this invention after being artificially cut.

[0011] Figure 3 The images show the healing state of cut strips of the different colored nanocomposite Eucommia ulmoides gum shape memory materials prepared in this invention after cross-placement and thermal triggering self-healing.

[0012] Figure 4 Tensile test of nanocomposite Eucommia ulmoides gum.

[0013] Figure 5 Macroscopic experiments on the shape recovery of nanocomposite Eucommia ulmoides gum.

[0014] Figure 6 Tensile test of self-healing eucommia gum nanocomposite.

[0015] Figure 7 The results of the self-healing tensile test of nanocomposite Eucommia ulmoides gum in Example 1 are shown.

[0016] Figure 8 The results of the self-healing tensile test of 1-nanometer composite Eucommia ulmoides gum are shown in the comparative example. Detailed Implementation

[0017] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0018] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0019] Example 1 1. Chemical modification of multifunctional nano-reinforcers: Weigh 10 parts by weight of Ti3C2T X The powder was dispersed in 300 parts by weight of deionized water and ultrasonically treated for 2 hours (500W) under ice-water bath conditions to form a uniform and stable Ti3C2T. X Dispersion. Add 0.3 parts by mass of the silane coupling agent γ-aminopropyltriethoxysilane (Ti3C2T) to the dispersion. X The product (3% by mass) was used to adjust the pH of the system to 4-5 with acetic acid, and then transferred to a constant temperature water bath at 70℃ and magnetically stirred for 8 hours at 300 rpm. After the reaction, the product was centrifuged at 8000 rpm and washed three times alternately with deionized water and anhydrous ethanol to remove unreacted coupling agent. Finally, it was dried in a vacuum drying oven at 60℃ for 12 hours and ground to obtain a modified nano-reinforcement (NH2-Ti3C2T) with amino active groups on the surface. X ).

[0020] 2. Preparation of nanocomposite masterbatch: 10 parts by mass of the modified NH2-Ti3C2T prepared in step 1 X Add 30 parts by weight of Eucommia ulmoides gum and 5 parts by weight of epoxidized soybean oil to a mixer and mix at 90°C for 20 minutes (rotor speed 60 rpm). During this process, with the help of the plasticizer's wetting effect and the shear force of the mixer, NH2-Ti3C2T X The nanomaterials are uniformly peeled off and dispersed in the Eucommia ulmoides gum matrix to form a composite masterbatch with uniformly dispersed nanomaterials, which is then discharged for later use.

[0021] 3. Dynamic sulfurization and topology network construction: The open mill was set to a rolling temperature of 130°C and the roll gap adjusted to 1.5 mm. The remaining 70 parts by weight of Eucommia ulmoides gum, all the nanocomposite masterbatch prepared in step 2, 3 parts by weight of bismaleimide (BMI), and 2 parts by weight of furfurylamide were then added to the open mill. Melt blending and dynamic vulcanization were performed at 130°C for 20 minutes. The mixture was then sheeted when the surface was smooth and there were no obvious edge breakages, yielding a uniformly mixed rubber compound.

[0022] 4. Molding and post-processing: The adhesive obtained in step 3 is cut into suitable sizes and placed in a preheated mold. It is then molded in a hot press at 135°C and 12MPa pressure for 10 minutes to further improve the DA crosslinking network. Subsequently, while maintaining the pressure, the mold is transferred to a cold press and rapidly cooled to 25°C for demolding. After demolding, the multi-responsive nanocomposite Eucommia ulmoides shape memory material is obtained.

[0023] Example 2 1. Chemical modification of multifunctional nano-reinforcers: Weigh out 15 parts by weight of Ti3C2T X The powder was dispersed in 300 parts by weight of deionized water and ultrasonically treated for 2 hours (500W) under ice-water bath conditions to form a uniform and stable Ti3C2T. X Dispersion. Add 0.3 parts by mass of the silane coupling agent γ-aminopropyltriethoxysilane (Ti3C2T) to the dispersion. X The product (2% by mass) was used to adjust the pH of the system to 4-5 with acetic acid, and then transferred to a constant temperature water bath at 70℃ and magnetically stirred for 8 hours at 300 rpm. After the reaction, the product was centrifuged at 8000 rpm and washed three times alternately with deionized water and anhydrous ethanol to remove unreacted coupling agent. Finally, it was dried in a vacuum drying oven at 60℃ for 12 hours and ground to obtain a modified nano-reinforcement (NH2-Ti3C2T) with amino active groups on the surface. X ).

[0024] 2. Preparation of nanocomposite masterbatch: 15 parts by mass of the modified NH2-Ti3C2T prepared in step 1 were used. X Add 35 parts by weight of Eucommia ulmoides gum and 6 parts by weight of epoxidized soybean oil to a mixer and mix at 90°C for 20 minutes (rotor speed 60 rpm). During this process, with the help of the plasticizer's wetting effect and the shear force of the mixer, NH2-Ti3C2T X The nanomaterials are uniformly peeled off and dispersed in the Eucommia ulmoides gum matrix to form a composite masterbatch with uniformly dispersed nanomaterials, which is then discharged for later use.

[0025] 3. Dynamic sulfurization and topology network construction: The open mill was set to a rolling temperature of 130°C and the roll gap adjusted to 1.5 mm. The remaining 65 parts by weight of Eucommia ulmoides gum, all the nanocomposite masterbatch prepared in step 2, 3 parts by weight of bismaleimide (BMI), and 2 parts by weight of furfurylamide were then added to the open mill. Melt blending and dynamic vulcanization were performed at 130°C for 20 minutes. The mixture was then sheeted when the surface was smooth and there were no obvious edge breakages, yielding a uniformly mixed rubber compound.

[0026] 4. Molding and post-processing: The adhesive obtained in step 3 is cut into suitable sizes and placed in a preheated mold. It is then molded in a hot press at 135°C and 12MPa pressure for 10 minutes to further improve the DA crosslinking network. Subsequently, while maintaining the pressure, the mold is transferred to a cold press and rapidly cooled to 25°C for demolding. After demolding, the multi-responsive nanocomposite Eucommia ulmoides shape memory material is obtained.

[0027] Example 3 1. Chemical modification of multifunctional nano-reinforcers: Weigh out 8 parts by weight of Ti3C2T X The powder was dispersed in 300 parts by weight of deionized water and ultrasonically treated for 2 hours (500W) under ice-water bath conditions to form a uniform and stable Ti3C2T. X Dispersion. Add 0.3 parts by mass of the silane coupling agent γ-aminopropyltriethoxysilane (Ti3C2T) to the dispersion. X The product (3.7% by mass) was used to adjust the pH of the system to 4-5 with acetic acid, and then transferred to a constant temperature water bath at 70℃ and magnetically stirred for 8 hours at 300 rpm. After the reaction, the product was centrifuged at 8000 rpm and washed three times alternately with deionized water and anhydrous ethanol to remove unreacted coupling agent. Finally, it was dried in a vacuum drying oven at 60℃ for 12 hours and ground to obtain a modified nano-reinforcement (NH2-Ti3C2T) with amino active groups on the surface. X ).

[0028] 2. Preparation of nanocomposite masterbatch: Eight parts by mass of the modified NH2-Ti3C2T prepared in step 1 were used. X Add 25 parts by weight of Eucommia ulmoides gum and 3 parts by weight of epoxidized soybean oil to a mixer and mix at 90°C for 20 minutes (rotor speed 60 rpm). During this process, with the help of the plasticizer's wetting effect and the shear force of the mixer, NH2-Ti3C2T X The nanomaterials are uniformly peeled off and dispersed in the Eucommia ulmoides gum matrix to form a composite masterbatch with uniformly dispersed nanomaterials, which is then discharged for later use.

[0029] 3. Dynamic sulfurization and topology network construction: The open mill was set to a rolling temperature of 130°C and a roll gap of 1.5 mm. The remaining 75 parts by weight of Eucommia ulmoides gum, all the nanocomposite masterbatch obtained in step 2, 2 parts by weight of bismaleimide (BMI), and 2 parts by weight of furfurylamide were then added to the open mill. Melt blending and dynamic vulcanization were performed at 130°C for 20 minutes. The mixture was then sheeted when the surface was smooth and there were no obvious edge breakages, yielding a uniformly mixed rubber compound.

[0030] 4. Molding and post-processing: The adhesive obtained in step 3 is cut into suitable sizes and placed in a preheated mold. It is then molded in a hot press at 135°C and 12MPa pressure for 10 minutes to further improve the DA crosslinking network. Subsequently, while maintaining the pressure, the mold is transferred to a cold press and rapidly cooled to 25°C for demolding. After demolding, the multi-responsive nanocomposite Eucommia ulmoides shape memory material is obtained.

[0031] Comparative Example 1 1. Unmodified nano-reinforcement treatment Weigh 10 parts by weight of unmodified Ti3C2T X 300 parts by weight of deionized water were sonicated for 2 hours, and the surface was dried directly by centrifugation without surface modification with silane coupling agent γ-aminopropyltriethoxysilane.

[0032] 2. Preparation of Simple Physical Blending Masterbatch 10 parts by weight of unmodified Ti3C2T X 30 parts by weight of Eucommia gum and 5 parts by weight of epoxidized soybean oil were mixed at 90°C for 20 minutes to obtain ordinary masterbatch.

[0033] 3. Traditional melt blending At 130°C, add 70 parts by weight of Eucommia ulmoides gum and all of the masterbatch, without adding dynamic covalent crosslinking agents or furan group providers, and blend for 20 minutes as usual.

[0034] S4 Molding and Post-processing Molding at 135℃ and 12MPa for 10 minutes, followed by cooling and demolding, yields unmodified Ti3C2T. X Eucommia gum material without dynamic cross-linking.

[0035] Comparative Example 2 1. No nano-reinforcers added. It uses only 100 parts by weight of Eucommia gum and 5 parts by weight of epoxidized soybean oil, without adding any nano-reinforcing agents, surface modifiers, or dynamic covalent crosslinking agents.

[0036] 2. Melt blending Mix at 90°C for 20 minutes in an internal mixer, then perform conventional plasticizing at 130°C for 20 minutes in an open mill.

[0037] 3. Molding and Post-processing Molding at 135℃ and 12MPa for 10 minutes, followed by cooling and demolding, yields pure Eucommia ulmoides gum material.

[0038] Comparative Example 3 1. No nano-reinforcers added. 100 parts by weight of Eucommia ulmoides gum, 10 parts by weight of industrial carbon black N330, 5 parts by weight of epoxidized soybean oil, without Ti3C2T. X No surface modification, no dynamic crosslinking agent.

[0039] 2. Melt mixing Mix at 90°C for 25 minutes in an internal mixer, and then mix at 130°C for 20 minutes in a conventional open mill.

[0040] 3. Molding and Post-processing Molding at 135℃ and 12MPa for 10 minutes, followed by cooling and demolding, yields a traditional carbon black-filled Eucommia ulmoides gum material.

[0041] Example 4 Performance Testing I. Tensile strength (MPa), elongation at break (%) Instrument: Electronic universal testing machine (METS CMT6104); Test method: Refer to GB / T 1040.2-2022.

[0042] II. Shape fixation rate (%), shape recovery rate (%) Testing instrument: DMA, Dynamic Thermomechanical Analyzer The steps for using the controlled force mode of a dynamic mechanics analyzer are as follows: ①: Heat the sample to 100℃ and keep it at 100℃ for 5 minutes. All the crystals inside the TPI will melt, and the initial strain of the sample will be ɛ0. ②: The cooling rate is 5°C / min, and the temperature is lowered to -50°C. A load of 0.1 MPa is applied, and the strain of the sample at this time is recorded as α. load ; ③: Remove the force applied to the sample; the strain of the sample at this time is denoted as ɛ. ④: Increase the sample temperature to 100°C at a heating rate of 5°C / min; The sample was kept at 100℃ for 15 minutes, and the material strain was denoted as α. rec ; The shape fixation rate (R) of the specimen f The shape recovery rate (Rr) and shape restoration rate are calculated using the following formula:

[0043]

[0044] R f It evaluates the ability of shape memory materials to lock into temporary shapes; R r It evaluates the ability of shape memory materials to recover their original shape from a temporary shape; ɛ0: initial strain, the strain of the material in its original shape without external force; ɛ load α is the maximum deformation of the specimen under stress; α is the deformation when the temperature drops to -50℃ and the stress drops to 0; α rec This is the deformation after the sample shape is restored.

[0045] III. Thermal Response Recovery Time Test Testing equipment: Self-built constant temperature hot stage testing platform.

[0046] Test method: 1. Pre-form the material into a "U" shape, "spiral" shape, or other specific temporary shape; 2. Preheat the heating table to 70℃ and stabilize it; 3. Quickly place the sample with the temporary shape on the hot stage and start video recording at the same time; 4. Observe and record the time taken from the time the sample comes into contact with the hot table until it fully returns to its original shape. Test each sample at least 5 times and take the average value.

[0047] IV. Self-repair efficiency test Testing instruments: electronic universal testing machine, vernier calipers, etc.

[0048] Test method: 1. Prepare a standard dumbbell-shaped specimen and test its original tensile strength σ0 according to the tensile property test method described above, which will serve as the reference mechanical property before repair; 2. Artificial cracks with a depth of 1 / 2 the thickness of the sample are cut into the gauge length to simulate internal material damage; 3. Place the cracked sample in a 100℃ constant temperature oven and keep it at that temperature for 30 minutes. The self-repair is achieved by utilizing the reversibility of the dynamic covalent network of the material. After cooling to room temperature, remove the sample. 4. Perform tensile property tests on the repaired specimen again and record its tensile strength σ1 after repair; 5. Self-repair efficiency calculation: Self-repair efficiency = (σ1 / σ0) × 100%.

[0049] The material performance test results of the materials prepared in Examples 1-3 and Comparative Examples 1-3 are shown in Table 1: Table 1 Test Project Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Test methods Tensile strength (MPa) 15.34 16.03 14.76 5.31 3.27 5.71 GB / T 528-2009 Elongation at break (%) 306.47 316.96 314.63 170.88 158.33 161.11 GB / T 528-2009 Shape fixation rate (%) 98.51 97.86 99.17 82.13 80.49 78.31 calculate Shape recovery rate (%) 97.23 96.55 98.26 85.38 83.22 70.14 calculate Thermal response time (s) 8.33 7.67 8.66 28.33 35.67 45.33 Self-built heating platform test (70℃) Self-repair efficiency (%) 81.16 86.46 72.15 45.57 52.36 57.63 calculate According to the table above, the nanocomposite Eucommia ulmoides shape memory materials prepared according to the present invention in Examples 1-3 exhibit excellent tensile strength, elongation at break, shape fixation rate, shape recovery rate, thermal response recovery time, and self-healing efficiency. In contrast, the comparative examples 1-3, which were not prepared according to the present invention, show inferior performance in all aspects compared to Examples 1-3.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A nanocomposite Eucommia ulmoides gum shape memory material, characterized in that, It comprises the following components: 20-40 parts by weight of matrix rubber, 5-20 parts by weight of modified nano-reinforcement, 5-15 parts by weight of surface modifier, 1-5 parts by weight of dynamic covalent crosslinking agent, 1-5 parts by weight of compound that can provide furan groups, 3-10 parts by weight of plasticizer, and 200-500 parts by weight of solvent. The base rubber is natural trans-1,4-polyisoprene from Eucommia ulmoides gum. The modified nanoreinforcement is modified Ti3C2T. X Nano-reinforcement; The surface modifier is a silane coupling agent γ-aminopropyltriethoxysilane; The dynamic covalent crosslinking agent is bismaleimide; The compound that provides the furan group is furfurylamine; The plasticizer is epoxidized soybean oil; The solvent is deionized water.

2. A method for preparing nanocomposite Eucommia ulmoides gum shape memory material, characterized in that, Includes the following steps: S1: Chemical modification of nano-reinforcement: Weigh out 5-20 parts by weight of Ti3C2T X Disperse in 200-500 parts by weight of deionized water and sonicate for 1-3 hours to form a uniform dispersion; The Ti3C2T X Modification method: Add γ-aminopropyltriethoxysilane, a silane coupling agent, to the dispersion, and react with magnetic stirring at 60-80℃ for 6-12 hours. After the reaction, centrifuge, wash, and dry to obtain modified Ti3C2T with amino groups on the surface. X Nano-reinforcement; S2: Preparation of nanocomposite masterbatch: The modified Ti3C2T prepared in step S1 X The nano-reinforcement, along with 20-40 parts by weight of Eucommia ulmoides gum and 3-10 parts by weight of plasticizer epoxidized soybean oil, are added to a mixer and premixed at 80-100℃ for 15-30 minutes to prepare a nano-composite masterbatch with uniformly dispersed nanomaterials. S3: Dynamic Sulfation and Topology Network Construction: 60-80 parts by weight of Eucommia ulmoides gum, the nanocomposite masterbatch obtained in step S2, and 1-5 parts by weight of dynamic covalent crosslinking agent bismaleimide and furfuralamine compound with 1-5 parts by weight of furan groups are added to a two-roll mill and melt-blended and dynamically vulcanized at a roller temperature of 125-135℃ for 15-30 minutes to prepare a dynamic covalent topological crosslinked network material. S4: Molding and Post-processing: The uniformly mixed dynamic covalent topological cross-linked network material in step S3 is molded in a hot press at 130-140℃ and 10-15MPa pressure for 5-15 minutes, and then cooled and demolded to obtain the nanocomposite Eucommia ulmoides gum shape memory material.

3. The preparation method according to claim 2, characterized in that: The silane coupling agent γ-aminopropyltriethoxysilane accounts for 1-5% of the mass of the dispersion.

4. The nanocomposite Eucommia ulmoides gum shape memory material prepared by any of the preparation methods described in claims 2-3.

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