Intelligent response silica gel material based on shape memory mechanism and preparation method thereof

Abstract

The invention relates to the technical field of high polymer materials, in particular to an intelligent response silica gel material based on a shape memory mechanism and a preparation method of the intelligent response silica gel material. The invention relates to an intelligent response silica gel material based on a shape memory mechanism, which is prepared by stepwise polymerizing castor oil, bis (3-aminopropyl) terminated polydimethylsiloxane, isophorone diisocyanate, an amino-containing micromolecule chain extender and fennel alcohol, and then adding neodymium chloride for rare earth metal coordination. And further adding a light response agent, an electromagnetic response agent and a coupling agent to prepare the intelligent response silica gel material based on the shape memory mechanism. The intelligent response silica gel material based on the shape memory mechanism prepared by the invention has excellent self-repairing performance, high response speed, high shape recovery rate and mechanical property, also has the advantages of wide applicability and environmental protection, and is a novel material with great prospects.

Description

Technical Field

[0001] The present application relates to the technical field of polymer materials, and in particular to an intelligent response silicone material based on shape memory mechanism and a preparation method thereof. Background Art

[0002] Shape memory materials, with their unique shape memory effect, have attracted widespread attention in the field of materials science. However, traditional shape memory materials face many challenges, such as slow response speed, low shape recovery rate and insufficient stability, which seriously limit their practical applications in various fields. Especially in situations where fast response and high-precision shape recovery are required, the performance of traditional materials is often difficult to meet the requirements. In addition, the preparation methods of traditional shape memory materials also have obvious shortcomings. During the material transfer and processing process, due to the complex process and difficult operation, the material properties are often lost, thus affecting the quality and performance of the final product. This not only increases the production cost, but also limits the application of shape memory materials in a wider range of fields. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present application provides a smart response silicone material based on shape memory mechanism and a preparation method thereof. The smart response silicone material based on shape memory mechanism prepared by the present application has excellent self-repairing performance, high response speed, high shape recovery rate and mechanical properties. Rare earth ions and C=O and CN on the polysiloxane prepolymer PDMS-3 form coordination effects of different strengths, giving it the ability to self-repair. At the same time, by introducing smart response mechanisms (temperature-sensitive thermoplastic polyurethane, light responder and electromagnetic responder) and castor oil bio-based addition, the shape memory performance of the silicone material is greatly improved, and it is given high response speed, high stability and personalized customization capabilities. This silicone material has broad application prospects and significant economic value in the fields of smart wear, soft robots, biomedical engineering, etc. In addition, the preparation process of the present application is simple, and castor oil bio-based is used as raw material for preparation, and the raw material source is wide, which has the advantage of green environmental protection.

[0004] In the first aspect, the present application provides an intelligent response silicone material based on shape memory mechanism, which adopts the following technical solution: A smart response silicone material based on shape memory mechanism, wherein the smart response silicone material based on shape memory mechanism is prepared by gradually polymerizing castor oil, bis(3-aminopropyl)-terminated polydimethylsiloxane, isophorone diisocyanate, an amino-containing small molecule chain extender and anise alcohol, then adding neodymium chloride for rare earth metal coordination, and then adding a photoresponse agent, an electromagnetic response agent and a coupling agent thereto, thereby preparing the smart response silicone material based on shape memory mechanism.

[0005] By adopting the above technical scheme, castor oil: As a bio-based raw material, castor oil not only provides environmental advantages, but also participates in the reaction with isophorone diisocyanate to generate thermoplastic polyurethane. This polyurethane gives the material shape memory properties, allowing it to change shape within a specific temperature range. It is particularly suitable for smart wearable devices, which can adjust the shape according to changes in human body temperature and improve wearing comfort. Bis(3-aminopropyl)-terminated polydimethylsiloxane (PDMS): This siloxane prepolymer contains active amino groups and can react with isophorone diisocyanate to form a network structure. At the same time, it can also form a coordination effect with neodymium chloride to enhance the self-healing ability of the material. Isophorone diisocyanate: As a multifunctional isocyanate, it reacts with castor oil and bis(3-aminopropyl)-terminated polydimethylsiloxane to generate a cross-linked polyurethane network, which is the basis of the material's shape memory properties. Amino-containing small molecule chain extenders: This type of chain extender can further expand the polyurethane network and increase the cross-linking density of the material, thereby improving its mechanical properties and shape memory effect. Fennel alcohol: As an auxiliary agent, fennel alcohol helps control the reaction rate and improve the purity of the product. Neodymium chloride: The rare earth metal neodymium chloride gives the material self-healing ability by forming a coordination effect with the C=0 and CN groups on PDMS. This coordination effect can re-form a stable network structure after the material is damaged, achieving self-repair. Photoresponse agent (4,4'-diaminoazobenzene): The photoresponse agent uses the photoisomerization effect of its photosensitive group (such as azobenzene) to cause the material to change shape under light. This allows the material to be used in light-controlled soft robots, and the robot's movement trajectory and morphological changes can be precisely controlled by light.

[0006] Electromagnetic responders (graphene and nano-iron tetroxide modified with γ-aminopropyltrimethoxysilane): These electromagnetic responders significantly improve the response performance of the material under the action of electromagnetic field, allowing the silicone material to change shape under the action of electromagnetic field. This has broad application prospects in the field of biomedical engineering, such as smart stents and drug release systems. Coupling agent: The coupling agent improves the compatibility and dispersibility between the components in the material, ensures the uniform distribution of the photoresponse agent and the electromagnetic responder in the material, thereby enhancing the overall response efficiency and stability. Through the coordination of neodymium chloride and PDMS, the material can re-form a stable network structure after damage and achieve self-repair. The thermoplastic polyurethane generated by castor oil and isophorone diisocyanate gives the material shape memory properties, allowing it to change shape within a specific temperature range. The introduction of photoresponse agents and electromagnetic responders enables the material to respond quickly and change shape under external stimuli (such as photoelectric magnetic fields). The amino-containing small molecule chain extender increases the cross-linking density of the material, thereby improving its mechanical properties. The coupling agent improves the compatibility and dispersibility of the components, ensures the overall stability and response efficiency of the material. In summary, the components work together to improve the comprehensive performance of the smart response silicone material based on the shape memory mechanism, including self-healing ability, high response speed, high shape recovery rate and excellent mechanical properties.

[0007] Preferably, the molar ratio of castor oil, bis(3-aminopropyl)-terminated polydimethylsiloxane and isophorone diisocyanate is 2:2:5.

[0008] Preferably, the amino-containing small molecule chain extender is at least one of 2,5-diaminopyridine and 4-methyl-2,3-diaminopyridine.

[0009] Preferably, the mass ratio of the bis(3-aminopropyl)-terminated polydimethylsiloxane to neodymium chloride is 1:0.2-0.4.

[0010] Preferably, the photoresponse agent is 4,4'-diaminoazobenzene; and the mass ratio of the 4,4'-diaminoazobenzene to the bis(3-aminopropyl)-terminated polydimethylsiloxane is 0.1-0.2:4.

[0011] Preferably, the electromagnetic response agent is prepared by mixing graphene and nano-ferroferric oxide in a mass ratio of 2:3 and modifying with a coupling agent; the mass ratio of the electromagnetic response agent to castor oil is 3:4.

[0012] Preferably, the method for preparing the electromagnetic response agent comprises the following steps: S71. According to the weight percentage, 40 parts of graphene and 60 parts of nano-iron tetroxide are placed in 1000 parts of a 2.0% polydimethyldiallyl ammonium chloride aqueous solution, stirred for 1-2 hours, filtered, washed, and dried to obtain a pre-modified electromagnetic response agent; S72. Disperse 100 parts of pre-modified electromagnetic responder in a solution consisting of 300 parts of ethanol and 100 parts of water according to their mass fractions, stir for 2-3 hours, then add 3.5 parts of γ-aminopropyltrimethoxysilane, adjust the pH of the solution to 5-6, stir for 4-5 hours, and obtain the electromagnetic responder by centrifugation, washing and drying.

[0013] By adopting the above technical solution, graphene and nano-ferroferric oxide are first modified with polydimethyldiallylammonium chloride and then modified with γ-aminopropyltrimethoxysilane, which significantly improves their compatibility and dispersibility, thereby improving the mechanical properties and electromagnetic response speed of the silicone material, and making the silicone material change shape under the action of the electromagnetic field. This silicone material has broad application prospects in biomedical engineering, such as smart stents, drug release systems, etc.

[0014] Preferably, the coupling agent is composed of γ-aminopropyltrimethoxysilane, anilinemethyltriethoxysilane and N-aminoethyl-γ-aminopropyltriethoxysilane in a mass ratio of 3:3:2.

[0015] By adopting the above technical scheme, these coupling agents can enhance the interfacial bonding between inorganic fillers (such as modified graphene and nano-iron tetroxide) and organic polymer matrix, thereby improving the overall mechanical properties of the material. By introducing these coupling agents, the stability of the material under different environmental conditions can be improved, and the performance degradation caused by factors such as moisture and temperature can be prevented. These coupling agents can also promote the cross-linking reaction inside the material, further enhance the network structure of the material, and improve its mechanical strength and elasticity. The silane group of γ-aminopropyltrimethoxysilane can react with functional groups such as hydroxyl groups on the surface of the inorganic filler to enhance the interfacial bonding. Anilinemethyltriethoxysilane: The presence of the benzene ring provides a rigid structure, which helps to improve the hardness and heat resistance of the material. At the same time, its silane group can also react with the surface of the inorganic filler to further enhance the interfacial bonding. N-aminoethyl-γ-aminopropyltriethoxysilane contains two amino groups, which can react with multiple active functional groups (such as isocyanate groups) to form more cross-linking points, thereby improving the cross-linking density and overall performance of the material. Its silane group also participates in the enhancement of interfacial bonding. Through their respective characteristics and functions, these three coupling agents form a good synergistic effect in the material, and jointly improve the comprehensive performance of the smart responsive silicone material, including self-healing performance, high response speed, high shape recovery rate and mechanical properties.

[0016] Preferably, the mass ratio of the coupling agent to the electromagnetic response agent is 1-1.5:100.

[0017] In a second aspect, the present application provides a method for preparing a smart response silicone material based on a shape memory mechanism, using the following technical solution: As a general technical concept, the present application also provides a method for preparing the above-mentioned smart response silicone material based on shape memory mechanism, comprising the following steps: S91, adding isophorone diisocyanate to the vacuum dehydrated castor oil and bis(3-aminopropyl)-terminated polydimethylsiloxane, dissolving it with N,N-dimethylformamide, and stirring at 53° C. for 1-2 hours to obtain an organosilicon prepolymer PDMS-1; S92, adding an amino-containing small molecule chain extender dissolved in N,N-dimethylformamide to the organosilicon prepolymer PDMS-1, and performing a chain extension reaction at 53° C. for 1-2 hours to obtain a polysiloxane prepolymer PDMS-2; S93, adding anise alcohol dissolved in N,N-dimethylformamide to the polysiloxane prepolymer PDMS-2, and performing a capping reaction at 53° C. for 1-2 hours to obtain the polysiloxane prepolymer PDMS-3; S94, adding neodymium chloride dissolved in N,N-dimethylformamide to the polysiloxane prepolymer PDMS-3 to prepare the polysiloxane prepolymer PDMS-4; S95, adding the photoresponse agent and the electromagnetic responder to anhydrous ethanol, stirring them fully, and performing ultrasonic dispersion for 6-8 hours, and then adding them to the polysiloxane prepolymer PDMS-4 together with the coupling agent, stirring the system at 53° C. for 2-3 hours, and obtaining a viscous polysiloxane PDMS-5; S96. Pour the viscous polysiloxane PDMS-5 into a polytetrafluoroethylene mold, dry it at room temperature for 24 hours, and then dry it in a drying oven at 65°C for 24 hours to obtain an intelligent responsive silicone material based on shape memory mechanism.

[0018] In summary, the present application includes at least one of the following beneficial technical effects: 1. Self-repairing performance: Through the coordination effect between rare earth ions (such as neodymium chloride) and C=O and CN on the polysiloxane prepolymer, the material can achieve efficient self-repair, extend the service life and maintain stable performance.

[0019] 2. High response speed: The introduction of multiple intelligent response mechanisms (such as temperature sensitivity, light responsiveness, and electromagnetic responsiveness) enables the material to respond quickly to different stimuli, improving application flexibility and efficiency.

[0020] 3. High shape recovery rate: Thermoplastic polyurethane generated by the reaction of castor oil and isophorone diisocyanate can exhibit excellent shape memory properties within a specific temperature range, ensuring efficient recovery after deformation.

[0021] 4. Excellent mechanical properties: By adding specific electromagnetic responders (such as modified graphene and nano-iron tetroxide), the mechanical properties of the material are significantly improved, allowing it to maintain good mechanical stability in complex environments.

[0022] 5. Intelligent response mechanism: The introduction of photoresponsive agents (such as 4,4'-diaminoazobenzene) and electromagnetic responsive agents enables the material to undergo controllable shape changes under the action of light and electromagnetic fields, expanding its application range.

[0023] 6. Green and environmentally friendly: Using castor oil as a bio-based raw material not only reduces dependence on petrochemical resources, but also reduces environmental pollution, which is in line with the concept of sustainable development.

[0024] 7. Personalized customization capability: By adjusting the proportion and type of each component, the material properties can be customized to meet the needs of different application scenarios.

[0025] 8. Broad application prospects: This intelligent responsive silicone material shows great application potential in the fields of smart wearables, soft robots, biomedical engineering, etc., and has significant economic and social value. DETAILED DESCRIPTION

[0026] The embodiments of the present application will be described in detail below in conjunction with the examples, but it will be appreciated by those skilled in the art that the following examples are only used to illustrate the present application and should not be considered as limiting the scope of the present application. If specific conditions are not specified in the examples, they are carried out according to normal conditions or the conditions recommended by the manufacturer. If the manufacturer is not specified for the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0027] In the following Examples and Preparation Examples, 1 part means 10 g.

[0028] Preparation Example 1 Preparation of electromagnetic response agent The preparation method of the electromagnetic response agent comprises the following steps: S71. According to the mass fractions, 40 parts of graphene and 60 parts of nano-iron tetroxide are placed in 1000 parts of a 2.0% aqueous solution of polydimethyldiallylammonium chloride, stirred for 1.5 hours, filtered, washed, and dried to obtain a pre-modified electromagnetic response agent; S72. Disperse 100 parts of pre-modified electromagnetic responder in a solution consisting of 300 parts of ethanol and 100 parts of water according to their mass proportions, stir for 2.3 hours, then add 3.5 parts of γ-aminopropyltrimethoxysilane, adjust the pH of the solution to 5.6, stir for 4.5 hours, and obtain the electromagnetic responder by centrifugation, washing and drying.

[0029] Example 1 A method for preparing an intelligent response silicone material based on shape memory mechanism comprises the following steps: S91, adding 0.5 mol of isophorone diisocyanate to 0.2 mol of castor oil and 0.2 mol of bis(3-aminopropyl)-terminated polydimethylsiloxane that had been subjected to vacuum dehydration treatment, dissolving the mixture with 100 mL of N,N-dimethylformamide, and stirring the mixture at 53° C. for 1 h to obtain an organosilicon prepolymer PDMS-1; S92, 14 g of 2,5-diaminopyridine dissolved in 85 mL of N,N-dimethylformamide was added to the organosilicon prepolymer PDMS-1, and the system was subjected to a chain extension reaction at 53° C. for 1 h to obtain a polysiloxane prepolymer PDMS-2; S93, adding 25.8 g of anise alcohol dissolved in 80 mL of N,N-dimethylformamide to the polysiloxane prepolymer PDMS-2, and performing a capping reaction at 53° C. for 1 h to obtain the polysiloxane prepolymer PDMS-3; S94, adding 64.5 g of neodymium chloride dissolved in 700 mL of N,N-dimethylformamide to the polysiloxane prepolymer PDMS-3 to prepare the polysiloxane prepolymer PDMS-4; S95, adding 8.07g of photoresponse agent and 140g of electromagnetic responder to 300mL of anhydrous ethanol, stirring thoroughly, and performing ultrasonic dispersion for 6h, and then adding them together with 1.4g of coupling agent to polysiloxane prepolymer PDMS-4, stirring the system at 53°C for 2h, to obtain viscous polysiloxane PDMS-5; the coupling agent is composed of γ-aminopropyltrimethoxysilane, anilinemethyltriethoxysilane and N-aminoethyl-γ-aminopropyltriethoxysilane in a mass ratio of 3:3:2; S96. Pour the viscous polysiloxane PDMS-5 into a polytetrafluoroethylene mold, dry it at room temperature for 24 hours, and then dry it in a drying oven at 65°C for 24 hours to obtain an intelligent responsive silicone material based on shape memory mechanism.

[0030] Example 2 A method for preparing an intelligent response silicone material based on shape memory mechanism comprises the following steps: S91, adding 0.5 mol of isophorone diisocyanate to 0.2 mol of castor oil and 0.2 mol of bis(3-aminopropyl)-terminated polydimethylsiloxane that had been subjected to vacuum dehydration treatment, dissolving the mixture with 100 mL of N,N-dimethylformamide, and stirring the mixture at 53° C. for 2 h to obtain an organosilicon prepolymer PDMS-1; S92, adding 14 g of 4-methyl-2,3-diaminopyridine dissolved in 85 mL of N,N-dimethylformamide to the organosilicon prepolymer PDMS-1, and performing a chain extension reaction at 53° C. for 2 h to obtain a polysiloxane prepolymer PDMS-2; S93, adding 25.8 g of anise alcohol dissolved in 80 mL of N,N-dimethylformamide to the polysiloxane prepolymer PDMS-2, and performing a capping reaction at 53° C. for 2 h to obtain a polysiloxane prepolymer PDMS-3; S94, adding 129 g of neodymium chloride dissolved in 1300 mL of N,N-dimethylformamide to the polysiloxane prepolymer PDMS-3 to obtain the polysiloxane prepolymer PDMS-4; S95, adding 16.14g of photoresponse agent and 140g of electromagnetic responder to 300mL of anhydrous ethanol, stirring thoroughly, and performing ultrasonic dispersion for 8h, and then adding them together with 2.1g of coupling agent to polysiloxane prepolymer PDMS-4, stirring the system at 53°C for 3h, to obtain viscous polysiloxane PDMS-5; the coupling agent is composed of γ-aminopropyltrimethoxysilane, anilinemethyltriethoxysilane and N-aminoethyl-γ-aminopropyltriethoxysilane in a mass ratio of 3:3:2; S96. Pour the viscous polysiloxane PDMS-5 into a polytetrafluoroethylene mold, dry it at room temperature for 24 hours, and then dry it in a drying oven at 65°C for 24 hours to obtain an intelligent responsive silicone material based on shape memory mechanism.

[0031] Example 3 A method for preparing an intelligent response silicone material based on shape memory mechanism comprises the following steps: S91, adding 0.5 mol of isophorone diisocyanate to 0.2 mol of castor oil and 0.2 mol of bis(3-aminopropyl)-terminated polydimethylsiloxane that had been subjected to vacuum dehydration treatment, dissolving the mixture with 100 mL of N,N-dimethylformamide, and stirring the mixture at 53° C. for 1.5 h to obtain an organosilicon prepolymer PDMS-1; S92, 14 g of 2,5-diaminopyridine dissolved in 85 mL of N,N-dimethylformamide was added to the organosilicon prepolymer PDMS-1, and the system was subjected to a chain extension reaction at 53° C. for 1.5 h to obtain a polysiloxane prepolymer PDMS-2; S93, adding 25.8 g of anise alcohol dissolved in 80 mL of N,N-dimethylformamide to the polysiloxane prepolymer PDMS-2, and performing a capping reaction at 53° C. for 1.5 h to obtain a polysiloxane prepolymer PDMS-3; S94, adding 88 g of neodymium chloride dissolved in 900 mL of N,N-dimethylformamide to the polysiloxane prepolymer PDMS-3 to prepare the polysiloxane prepolymer PDMS-4; S95, adding 12g of photoresponse agent and 140g of electromagnetic responder to 300mL of anhydrous ethanol, stirring thoroughly, and performing ultrasonic dispersion for 7h, and then adding them together with 1.8g of coupling agent to polysiloxane prepolymer PDMS-4, stirring the system at 53°C for 2.5h, to obtain viscous polysiloxane PDMS-5; the coupling agent is composed of γ-aminopropyltrimethoxysilane, anilinemethyltriethoxysilane and N-aminoethyl-γ-aminopropyltriethoxysilane in a mass ratio of 3:3:2; S96. Pour the viscous polysiloxane PDMS-5 into a polytetrafluoroethylene mold, dry it at room temperature for 24 hours, and then dry it in a drying oven at 65°C for 24 hours to obtain an intelligent responsive silicone material based on shape memory mechanism.

[0032] Comparative Example 1 The same as Example 3, except that: the coupling agent is γ-aminopropyltrimethoxysilane.

[0033] Comparative Example 2 The same as Example 3, except that: the coupling agent is anilinemethyltriethoxysilane.

[0034] Comparative Example 3 The same as Example 3, except that: the coupling agent is N-aminoethyl-γ-aminopropyltriethoxysilane.

[0035] Comparative Example 4 The same as Example 3, except that an equal amount of a mixture (graphene and nano-ferroferric oxide mixed in a mass ratio of 2:3) is used instead of the electromagnetic response agent.

[0036] Performance testing The intelligent response silicone materials based on shape memory mechanism prepared in the above-mentioned Examples 1 to 3 and Comparative Examples 1 to 4 were sampled and subjected to the following tests. The results are shown in Table 1.

[0037] Tensile strength and elongation at break: The tensile strength of the smart response silicone material was tested using a UTM2203 universal electronic tensile machine (sensor: 100N), with a tensile rate of 50mm / min and a sample length, width and thickness of 15×5×0.5mm. Self-healing performance: Use a scalpel to repair the smart responsive silicone material at 60°C for 20 minutes, repeat the above operation 10 times, and then test the tensile strength and elongation at break; Sensing sensitivity: The relative resistance change value of the strain sensor is monitored online during the stretching process. The sensitivity is the rate of change of the relative resistance of the sensor. The higher the rate of change, the more sensitive the sensor is.

[0038] Table 1 Performance test Analyzing the data in Table 1, we can see that: 1) The smart response silicone material based on shape memory mechanism prepared in Example 1-Example 3 has excellent self-repairing performance, high response speed, high shape recovery rate and mechanical properties. Rare earth ions form coordination effects of different strengths with C=O and CN on the polysiloxane prepolymer PDMS-3, giving it the ability to self-repair. At the same time, by introducing smart response mechanisms (temperature-sensitive thermoplastic polyurethane, light responders and electromagnetic responders) and castor oil bio-based additions, the shape memory performance of silicone materials is greatly improved, and it is given high response speed, high stability and personalized customization capabilities. This silicone material has broad application prospects in the fields of smart wearables, soft robots, biomedical engineering, etc.

[0039] 2) The performance comparison analysis of the smart response silicone material based on the shape memory mechanism prepared in Example 3 and Comparative Examples 1-3 shows that the coupling agent is composed of γ-aminopropyltrimethoxysilane, anilinemethyltriethoxysilane and N-aminoethyl-γ-aminopropyltriethoxysilane in a mass ratio of 3:3:2. These coupling agents can enhance the interfacial bonding force between inorganic fillers (such as modified graphene and nano-iron tetroxide) and organic polymer matrices, thereby improving the overall mechanical properties of the material. By introducing these coupling agents, the stability of the material under different environmental conditions can be improved to prevent performance degradation caused by factors such as moisture and temperature. These coupling agents can also promote the cross-linking reaction inside the material, further enhance the network structure of the material, and improve its mechanical strength and elasticity. These three coupling agents form a good synergistic effect in the material through their respective characteristics and functions, and jointly improve the comprehensive performance of the smart response silicone material, including self-healing performance, high response speed, high shape recovery rate and mechanical properties.

[0040] 3) The performance comparison analysis of the intelligent response silicone material based on the shape memory mechanism prepared in Example 3 and Comparative Example 4 shows that the electromagnetic response agent prepared in the present application first modifies the graphene and nano-ferroferric oxide with polydimethyldiallylammonium chloride and then with γ-aminopropyltrimethoxysilane, which significantly improves its compatibility and dispersibility, thereby improving the comprehensive performance of the silicone material, including self-healing ability, high response speed, high shape recovery rate and excellent mechanical properties.

[0041] The above embodiments are only used to explain the technical solutions of the present application rather than to limit them. Although the above embodiments provide a specific description of the present application, relevant technical personnel should understand that the specific implementation methods of the present application can still be modified or replaced by equivalents, and any modifications and equivalent replacements that do not depart from the spirit and scope of the present application should be included in the protection scope of the present application.

Claims

1. An intelligent response silicone material based on shape memory mechanism, characterized in that: The intelligent response silicone material based on shape memory mechanism is prepared by gradually polymerizing castor oil, bis(3-aminopropyl)-terminated polydimethylsiloxane, isophorone diisocyanate, an amino-containing small molecule chain extender and anise alcohol, then adding neodymium chloride for rare earth metal coordination, and then adding a photoresponse agent, an electromagnetic response agent and a coupling agent to prepare the intelligent response silicone material based on shape memory mechanism.

2. The intelligent response silicone material based on shape memory mechanism according to claim 1, characterized in that: The molar ratio of the castor oil, the bis(3-aminopropyl)-terminated polydimethylsiloxane and isophorone diisocyanate is 2:2:

5.

3. The intelligent response silicone material based on shape memory mechanism according to claim 1, characterized in that: The amino-containing small molecule chain extender is at least one of 2,5-diaminopyridine and 4-methyl-2,3-diaminopyridine.

4. The intelligent response silicone material based on shape memory mechanism according to claim 1, characterized in that: The mass ratio of the bis(3-aminopropyl)-terminated polydimethylsiloxane to neodymium chloride is 1:0.2-0.

4.

5. The intelligent response silicone material based on shape memory mechanism according to claim 1, characterized in that: The photoresponse agent is 4,4'-diaminoazobenzene; the mass ratio of the 4,4'-diaminoazobenzene to the bis(3-aminopropyl)-terminated polydimethylsiloxane is 0.1-0.2:

4.

6. The intelligent response silicone material based on shape memory mechanism according to claim 1, characterized in that: The electromagnetic response agent is prepared by mixing graphene and nano-ferroferric oxide in a mass ratio of 2:3 and modifying with a coupling agent; the mass ratio of the electromagnetic response agent to castor oil is 3:

4.

7. The intelligent response silicone material based on shape memory mechanism according to claim 6, characterized in that: The preparation method of the electromagnetic response agent comprises the following steps: S71. According to the mass fractions, 40 parts of graphene and 60 parts of nano-iron tetroxide are placed in 1000 parts of a 2.0% aqueous solution of polydimethyldiallylammonium chloride, stirred for 1-2 hours, filtered, washed, and dried to obtain a pre-modified electromagnetic response agent; S72. Disperse 100 parts of pre-modified electromagnetic responder in a solution consisting of 300 parts of ethanol and 100 parts of water according to their mass fractions, stir for 2-3 hours, then add 3.5 parts of γ-aminopropyltrimethoxysilane, adjust the pH of the solution to 5-6, stir for 4-5 hours, and obtain the electromagnetic responder by centrifugation, washing and drying.

8. The intelligent response silicone material based on shape memory mechanism according to claim 1, characterized in that: The coupling agent is composed of γ-aminopropyltrimethoxysilane, anilinemethyltriethoxysilane and N-aminoethyl-γ-aminopropyltriethoxysilane in a mass ratio of 3:3:2; the mass ratio of the coupling agent to the electromagnetic response agent is 1-1.5:

100.

9. A method for preparing a smart response silicone material based on shape memory mechanism as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: S91, adding isophorone diisocyanate to the vacuum dehydrated castor oil and bis(3-aminopropyl)-terminated polydimethylsiloxane, dissolving it with N,N-dimethylformamide, and stirring at 53° C. for 1-2 hours to obtain an organosilicon prepolymer PDMS-1; S92, adding an amino-containing small molecule chain extender dissolved in N,N-dimethylformamide to the organosilicon prepolymer PDMS1, and performing a chain extension reaction at 53° C. for 1-2 hours to obtain a polysiloxane prepolymer PDMS2; S93, adding anise alcohol dissolved in N,N-dimethylformamide to the polysiloxane prepolymer PDMS2, and performing a capping reaction at 53° C. for 1-2 hours to obtain the polysiloxane prepolymer PDMS3; S94, adding neodymium chloride dissolved in N,N-dimethylformamide to the polysiloxane prepolymer PDMS3 to prepare the polysiloxane prepolymer PDMS4; S95, adding the photoresponse agent and the electromagnetic responder to anhydrous ethanol, stirring them fully, and performing ultrasonic dispersion for 6-8 hours, and then adding them to the polysiloxane prepolymer PDMS4 together with the coupling agent, stirring the system at 53° C. for 2-3 hours, and obtaining a viscous polysiloxane PDMS5; S96. Pour the viscous polysiloxane PDMS5 into a polytetrafluoroethylene mold, dry it at room temperature for 24 hours, and then dry it in a drying oven at 65°C for 24 hours to obtain an intelligent responsive silicone material based on a shape memory mechanism.

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