High-performance functional composite elastomer material as well as preparation method and application thereof
A high-performance functional composite elastomer material was prepared by combining iron nitride with a self-healing thermoplastic polyurethane matrix. This material solves the problems of low magnetic loss and poor interface performance in existing electromagnetic radiation protection materials, and achieves wide-band high-efficiency electromagnetic wave absorption and self-healing capabilities. It is suitable for the industrial production of electromagnetic protection materials.
Patent Information
- Application Number
- CN202511416396.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2025-12-26
Smart Images
Figure CN121203379A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of materials technology, specifically relating to a high-performance functional composite elastomer material, its preparation method, and its application. Background Technology
[0002] The advent of modern communication and electronic devices has made daily life more convenient, but it has also brought an invisible threat: electromagnetic radiation. Electromagnetic radiation emitted into the living environment from both natural (lightning, earthquakes, solar flares, lightning strikes, electrostatic discharge, etc.) and man-made (radio, television, computers, mobile phones, etc.) sources can cause problems for health and industrial production. For example, electromagnetic radiation not only significantly increases the risk of cardiovascular and cerebrovascular diseases in vulnerable groups such as the elderly, children, and pregnant women, but it can also cause malfunctions in precision instruments and even generate electrical sparks. Electromagnetic absorbing materials are functional materials that can convert electromagnetic wave energy into other types of energy, such as heat, through a loss mechanism. It is one of the most effective methods to solve the problems caused by electromagnetic radiation. However, the absorbing agent itself has low magnetic loss capacity, resulting in poor electromagnetic wave absorption, and magnetic loss materials generally have high density, making it difficult to meet the requirements of "thin thickness, light weight, wide frequency band, and strong absorption." Furthermore, electromagnetic wave absorbing materials are usually applied to the surface of the protected object, making them susceptible to scratches or cracks due to fatigue wear. This severely reduces the material's electromagnetic wave absorption performance, or even causes it to fail, making it difficult to meet the requirements of material durability. Polyurethane-based electromagnetic wave absorbing materials have attracted widespread attention in the field of electromagnetic wave absorption due to their excellent designability, ease of processing, and corrosion resistance. For example, Kang et al. prepared a carbon nanofiber / polyurethane electromagnetic wave composite absorbing material with a minimum reflection loss of -39.1 dB and an effective absorption bandwidth of 3.0 GHz. Using polyurethane as a matrix and further introducing absorbing agents to prepare electromagnetic wave absorbing films has significant research value. However, the poor interfacial properties between the absorbing agent and the matrix, leading to poor mechanical properties and durability, urgently need to be addressed. Summary of the Invention
[0003] To address the problems existing in the prior art, this invention provides a high-performance functional composite elastomer material, its preparation method, and its applications, yielding an iron-nitrogen compound / polyurethane composite material. The iron nitride exhibits excellent magnetic loss capability and corrosion resistance. The oxime ester bonds introduced into the self-healing thermoplastic polyurethane matrix endow the polyurethane with self-healing ability, improving the material's durability. Furthermore, due to their coordination with the iron-nitrogen compound, they enhance the interfacial properties of the high-performance functional composite elastomer material. The preparation method of this invention is simple, low-cost, and suitable for large-scale industrial production.
[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:
[0005] A high-performance functional composite elastomer material, calculated based on 100% of the total mass of the high-performance functional composite elastomer material, has the following components and percentage content:
[0006] Iron nitride filler 20%–80%
[0007] Self-healing thermoplastic polyurethane elastomer matrix: 20%–80%.
[0008] The iron nitride filler is prepared by a solvothermal reaction and a gas nitriding process.
[0009] The iron nitride filler has a hollow microsphere morphology with a size distribution of 1–300 μm;
[0010] The iron nitride filler is composed of at least one of Fe3N and Fe4N;
[0011] The thickness of the high-performance functional composite elastomer material is 0.5 mm to 10 mm.
[0012] The thickness of the high-performance functional composite elastomer material is 2mm to 5mm.
[0013] The high-performance functional composite elastomer material contains 45% to 55% iron nitride by mass.
[0014] The preparation method of the above-mentioned high-performance functional composite elastomer material mainly includes the following steps:
[0015] Step 1, preparation of iron nitride filler, namely the synthesis of iron nitride hollow microspheres, the specific method is as follows:
[0016] Ethylene glycol, ferric chloride hexahydrate, polyethylene glycol, and urea were added to an organic solvent and stirred until homogeneous before undergoing a solvothermal reaction. The resulting product was centrifuged, washed, and dried. Finally, the product was subjected to a gas nitriding process to obtain iron nitride filler.
[0017] Step 2: Polytetrahydrofuran diol, isocyanate, chain extender and catalyst are dispersed in an organic solvent and polymerized at a certain temperature. After the polymerization reaction is completed, the mixture is dried to obtain a self-healing thermoplastic polyurethane matrix.
[0018] Step 3: Dissolve the self-healing thermoplastic polyurethane matrix obtained in Step 2 in tetrahydrofuran, and add the iron nitride filler obtained in Step 1. After stirring evenly, place it in a mold and dry to obtain a high-performance functional composite elastomer material.
[0019] In step 1, the ratio of organic solvents ethylene glycol, ferric chloride hexahydrate, polyethylene glycol and urea is: 10-100mL: 50-100mL: 1-3g: 2-6g: 2-10g;
[0020] In step 1, the solvent mainly includes one of N,N-dimethylformamide and N,N-dimethylacetamide, the solvothermal reaction temperature is 100℃~200℃, and the solvothermal reaction time is 10h~24h.
[0021] In step 1, during the gas nitriding process: the nitriding temperature is 400℃~600℃, the nitriding time is 0.5~8h, and the atmosphere is ammonia.
[0022] In step 2, the total mass of polytetrahydrofuran diol, isocyanate, chain extender, and catalyst is calculated as 100%, wherein the mass percentage of polytetrahydrofuran diol is 40%-70%; the mass percentage of isocyanate is 15%-40%; the mass percentage of chain extender is 10%-30%; the mass percentage of catalyst is 0.1%-0.3%; and the ratio of organic solvent to polytetrahydrofuran diol is 10-30 mL: 15 g.
[0023] In step 2, the polytetrahydrofuran diol has a molecular weight of 600-3000, the isocyanate is at least one of toluene diisocyanate, diphenylmethane diisocyanate, and isophorone diisocyanate, the chain extender is mainly at least one of dimethylglyoxime and 2,4-pentanedioxime, the catalyst is dibutyltin dilaurate, and the organic solvent is one of N,N-dimethylformamide and N,N-dimethylacetamide.
[0024] In step 2, dimethylglyoxime, isophorone diisocyanate, dibutyltin dilaurate, and an organic solvent are added to a three-necked flask and reacted at 80-100°C for 1-6 hours. The reaction system temperature is then lowered to 60-80°C, polytetrahydrofuran diol is added, and the reaction continues for another 1-6 hours. Further, isophorone diisocyanate is dissolved in an organic solvent and added to the three-necked flask, reacting for 12-24 hours. After drying, a self-healing thermoplastic polyurethane matrix is obtained at a drying temperature of 40-80°C for 48-96 hours.
[0025] In step 3, the ratio of the self-healing thermoplastic polyurethane matrix to tetrahydrofuran is 1g:10mL;
[0026] In step 3, the drying temperature is 40-80℃ and the drying time is 48-96h.
[0027] A self-healing, high-efficiency electromagnetic wave absorbing polyurethane composite material as described above can be used on the shell surface of equipment such as aircraft and signal base stations.
[0028] This invention prepares a high-performance functional composite elastomer material: using hollow iron nitride microspheres as filler, it reduces density while providing magnetic loss capability. Furthermore, by combining it with a self-healing thermoplastic polyurethane matrix, it achieves efficient electromagnetic wave absorption capability in the 2GHz–18GHz range while significantly improving the durability of the material system.
[0029] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:
[0030] The self-healing, high-efficiency electromagnetic wave absorbing polyurethane composite material of this invention exhibits excellent absorption performance, including a wide effective absorption frequency band, strong mechanical properties, and high self-healing efficiency. It can be widely used in electromagnetic protection materials and demonstrates excellent durability. The preparation method of this invention is simple and low-cost, requiring no complex synthesis equipment, and can be mass-produced on a large scale.
[0031] This invention relates to a high-performance functional composite elastomer material, comprising iron nitride filler and a self-healing polyurethane elastomer matrix, wherein the mass fraction of the iron nitride filler is 20%–80%, and the mass fraction of the self-healing polyurethane elastomer matrix is 20%–80%; the iron nitride filler has a hollow microsphere morphology with a size distribution of 1–300 μm. This invention also discloses the above-mentioned high-performance functional composite elastomer material. This invention prepares an iron nitride hollow microsphere microwave absorber through a solvothermal reaction and nitriding process. This reduces the material density while improving magnetic loss capability. The hollow microsphere morphology facilitates multiple scattering and reflection of electromagnetic waves within the material, enhancing its electromagnetic wave absorption capability. At a thickness of 2 mm, the minimum reflection loss reaches -56.3 dB, and the effective absorption bandwidth reaches 6.9 GHz. Furthermore, by combining iron nitride with a self-healing thermoplastic polyurethane matrix, the resulting high-performance functional composite elastomer material possesses excellent self-healing capabilities, significantly improving the durability of the material system. The preparation method of this invention is simple, low-cost, requires no complex synthesis equipment, and can be mass-produced. Attached Figure Description
[0032] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.
[0033] Figure 1 SEM images of hollow spherical iron nitride (a) and self-healing high-efficiency electromagnetic wave absorbing polyurethane composite material (b) in Example 1 of the present invention;
[0034] Figure 2 The X-ray diffraction pattern of the hollow spherical iron nitride in Example 1 of the present invention;
[0035] Figure 3The stress-strain curves of the high-performance functional composite elastomer materials in Examples 1, 2, and 3 of this invention before (a) and after (b) fracture self-healing are shown.
[0036] Figure 4 The reflection loss spectrum of the high-performance functional composite elastomer material prepared in Example 1 of this invention;
[0037] Figure 5 The image shows the reflection loss spectrum of the high-performance functional composite elastomer material prepared in Example 2 of this invention.
[0038] Figure 6 The image shows the reflection loss spectrum of the high-performance functional composite elastomer material prepared in Example 3 of this invention. Detailed Implementation
[0039] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.
[0040] A high-performance functional composite elastomer material comprises iron nitride filler and a self-healing thermoplastic polyurethane matrix, wherein the mass fraction of the iron nitride filler is 20%–80%, and the mass fraction of the self-healing thermoplastic polyurethane matrix is 20%–80%. The iron nitride filler has a hollow microsphere morphology with a size distribution of 1–300 μm and is composed of at least one of Fe3N and Fe4N. The thickness of the high-performance functional composite elastomer material is 0.5 mm–10 mm. The mass fraction of iron nitride in the high-performance functional composite elastomer material is 45%–55%.
[0041] The preparation method of high-performance functional composite elastomer materials mainly includes the following steps:
[0042] Step 1, Synthesis of hollow iron nitride microspheres: Ethylene glycol, ferric chloride hexahydrate, polyethylene glycol and urea are added to an organic solvent, stirred until uniformly mixed and subjected to a solvothermal reaction; the resulting product is centrifuged, washed and dried, and finally subjected to a gas nitriding process.
[0043] Step 2, Preparation of high-performance functional composite elastomer material: Polytetrahydrofuran diol, isocyanate, chain extender and catalyst are dispersed in an organic solvent and polymerized at a certain temperature; the above self-healing thermoplastic polyurethane matrix is dried and then dissolved again in tetrahydrofuran, while iron nitride powder is added, stirred evenly and then placed in a mold for drying.
[0044] The solvothermal reaction described in step 1 uses an organic solvent that mainly includes one of N,N-dimethylformamide and N,N-dimethylacetamide. The reaction temperature is 100℃~200℃ and the reaction time is 10h~24h.
[0045] In step 1, during the solvothermal reaction, the volume of ethylene glycol is 50–100 mL; the amount of ferric chloride hexahydrate added is 1–3 g; the amount of urea added is 2–10 g; and the amount of polyethylene glycol added is 2–6 g.
[0046] The gas nitriding process described in step 1 involves a nitriding temperature of 400℃ to 600℃, a nitriding time of 0.5 to 8 hours, and an atmosphere of ammonia.
[0047] The raw materials for the self-healing polyurethane elastomer described in step 2 are calculated based on the total mass of the polyurethane elastomer raw materials as 100%, and the percentage content of each component is as follows: polytetrahydrofuran diol 40%-70%; isocyanate 15%-40%; chain extender 10%-30%; catalyst 0.1%-0.3%; and the ratio of organic solvent to polytetrahydrofuran diol is 10-30 mL: 15 g.
[0048] The polytetrahydrofuran diol in step 2 has a molecular weight of 600-3000, and the isocyanate is at least one of toluene diisocyanate, diphenylmethane diisocyanate, and isophorone diisocyanate; the chain extender is mainly at least one of dimethylglyoxime and 2,4-pentanedioxime, and the catalyst is dibutyltin dilaurate.
[0049] The drying process described in step 2 is carried out at a temperature of 40–80°C for a time of 48–96 hours.
[0050] Example 1
[0051] The method for preparing the high-performance functional composite elastomer material of the present invention includes the following steps:
[0052] (1) Synthesis of hollow iron nitride microspheres
[0053] 2.3 g of ferric chloride hexahydrate, 6 g of urea, 4 g of polyethylene glycol, and 60 mL of ethylene glycol were mixed thoroughly in a beaker and then transferred to a stainless steel reactor lined with polytetrafluoroethylene. The mixture was reacted in an oven at 195 °C for 20 h. The resulting product was washed, dried, and then vacuum dried at 60 °C for 24 h. Finally, the resulting powder was placed in an NH3 atmosphere and kept at 520 °C for 1 h to obtain hollow iron nitride microspheres.
[0054] (2) Synthesis of self-healing thermoplastic polyurethane elastomer
[0055] 1.74 g of dimethylglyoxime, 3.33 g of isophorone diisocyanate, three drops of dibutyltin dilaurate, and 10 mL of N,N-dimethylformamide were added to a three-necked flask and reacted at 80 °C for 3 h. The reaction system temperature was then lowered to 60 °C, and 10 g of polytetrahydrofuran diol was added, with the reaction continuing for another 3 h. Further, 2.22 g of isophorone diisocyanate was dissolved in 5 mL of DMF and added to the three-necked flask, reacting for 12 h to obtain self-healing polyurethane. Finally, iron nitride hollow microsphere powder and self-healing polyurethane were added to 10 mL of tetrahydrofuran at a mass ratio of 35:65, stirred for 3 h, poured into a mold, and dried in an oven at 40 °C for 48 h.
[0056] Example 2
[0057] The method for preparing the high-performance functional composite elastomer material of the present invention includes the following steps:
[0058] (1) Synthesis of hollow iron nitride microspheres
[0059] 2.3 g of ferric chloride hexahydrate, 6 g of urea, 4 g of polyethylene glycol, and 60 mL of ethylene glycol were mixed thoroughly in a beaker and then transferred to a stainless steel reactor lined with polytetrafluoroethylene. The mixture was reacted in an oven at 195 °C for 20 h. The resulting product was washed, dried, and then vacuum dried at 60 °C for 24 h. Finally, the resulting powder was placed in an NH3 atmosphere and kept at 520 °C for 1 h to obtain hollow iron nitride microspheres.
[0060] (2) Synthesis of self-healing thermoplastic polyurethane matrix
[0061] 1.74 g of dimethylglyoxime, 3.33 g of isophorone diisocyanate, three drops of dibutyltin dilaurate, and 10 mL of N,N-dimethylformamide were added to a three-necked flask and reacted at 80 °C for 3 h. The reaction system temperature was then lowered to 60 °C, and 10 g of polytetrahydrofuran diol was added, with the reaction continuing for another 3 h. Further, 2.22 g of isophorone diisocyanate was dissolved in 5 mL of DMF and added to the three-necked flask, reacting for 12 h to obtain self-healing polyurethane. Finally, iron nitride hollow microsphere powder and the self-healing thermoplastic polyurethane matrix were added to 10 mL of tetrahydrofuran at a mass ratio of 45:55, stirred for 3 h, poured into a mold, and dried in an oven at 40 °C for 48 h.
[0062] Example 3
[0063] The method for preparing the high-performance functional composite elastomer material of the present invention includes the following steps:
[0064] (1) Synthesis of hollow iron nitride microspheres
[0065] 2.3 g of ferric chloride hexahydrate, 6 g of urea, 4 g of polyethylene glycol, and 60 mL of ethylene glycol were mixed thoroughly in a beaker and then transferred to a stainless steel reactor lined with polytetrafluoroethylene. The mixture was reacted in an oven at 195 °C for 20 h. The resulting product was washed, dried, and then vacuum dried at 60 °C for 24 h. Finally, the resulting powder was placed in an NH3 atmosphere and kept at 520 °C for 1 h to obtain hollow iron nitride microspheres.
[0066] (2) Synthesis of self-healing thermoplastic polyurethane matrix
[0067] 1.74 g of dimethylglyoxime, 3.33 g of isophorone diisocyanate, three drops of dibutyltin dilaurate, and 10 mL of N,N-dimethylformamide were added to a three-necked flask and reacted at 80 °C for 3 h. The reaction system temperature was then lowered to 60 °C, and 10 g of polytetrahydrofuran diol was added, with the reaction continuing for another 3 h. Further, 2.22 g of isophorone diisocyanate was dissolved in 5 mL of DMF and added to the three-necked flask, reacting for 12 h to obtain a self-healing thermoplastic polyurethane matrix. Finally, iron nitride hollow microsphere powder and the self-healing thermoplastic polyurethane matrix were added to 10 mL of tetrahydrofuran at a mass ratio of 55:45, stirred for 3 h, poured into a mold, and dried in an oven at 40 °C for 48 h.
[0068] Figure 1 These are SEM images of the hollow spherical iron nitride (a) and the high-performance functional composite elastomer material (b) from Example 1 of the present invention; Figure 1 (a) It can be seen that the particles have a hollow spherical morphology, with a particle size distribution between 4 and 11 μm. Figure 1 (b) It can be seen that hollow microspheres are uniformly distributed in the high-performance functional composite elastomer material.
[0069] Figure 2 The hollow microspheres prepared in Example 1 have a phase of Fe4N.
[0070] Figure 3 The stress-strain curves of the high-performance functional composite elastomer materials in Examples 1, 2, and 3 before (a) and after (b) fracture self-healing are shown.
[0071] The high-performance functional composite elastomer materials obtained in Examples 1, 2, and 3 were subjected to tensile strength tests according to GB / T 1040.1-2018. The test results were: tensile strengths of 10.1 MPa, 5.8 MPa, and 2.1 MPa, respectively.
[0072] Examples 1, 2, and 3 exhibit strong mechanical properties;
[0073] Furthermore, after 48 hours of room temperature self-healing, Examples 1, 2, and 3 exhibited tensile strengths of 7.4 MPa, 3.5 MPa, and 1.1 MPa, respectively, with self-healing efficiencies of 73.3%, 60.3%, and 52.4%, respectively.
[0074] Figure 4 The image shows the reflection loss spectrum of the high-performance functional composite elastomer material prepared in Example 1. The product exhibits good electromagnetic wave absorption performance, with a minimum reflection loss of -56.3dB when the thickness is only 2mm, and an effective absorption bandwidth of 6.9GHz. It also shows high-intensity and wide-band absorption characteristics.
[0075] Figure 5 The image shows the reflection loss spectrum of the high-performance functional composite elastomer material prepared in Example 2. The prepared high-performance functional composite elastomer material exhibits a minimum reflection loss of -10.2dB and an effective absorption bandwidth of 2.9GHz at a thickness of 2mm, and also shows a certain electromagnetic wave absorption capability.
[0076] Figure 6 The image shows the reflection loss spectrum of the high-performance functional composite elastomer material prepared in Example 3. The prepared high-performance functional composite elastomer material exhibits a minimum reflection loss of -47.6dB and an effective absorption bandwidth of 7.9GHz at a thickness of 2mm, and also shows a certain electromagnetic wave absorption capability.
[0077] This invention prepares a hollow iron nitride microsphere microwave absorber via a solvothermal reaction and nitriding process. This reduces the material density while improving magnetic loss capability. The hollow microsphere morphology facilitates multiple scattering and reflection of electromagnetic waves within the microspheres, enhancing the material's electromagnetic wave absorption capacity. Furthermore, combining iron nitride with a self-healing thermoplastic polyurethane matrix results in a high-performance functional composite elastomer material with excellent self-healing capabilities, significantly improving the durability of the material system. The preparation method of this invention is simple, low-cost, and suitable for large-scale industrial production.
[0078] In summary, the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.
Claims
1. A high-performance functional composite elastomer material, characterized in that: Based on the total mass of this high-performance functional composite elastomer material being 100%, the components and their percentage content are as follows: Iron nitride filler 20%–80% Self-healing thermoplastic polyurethane elastomer matrix: 20%–80%.
2. The high-performance functional composite elastomer material according to claim 1, characterized in that: The iron nitride filler is prepared by a solvothermal reaction and a gas nitriding process. The iron nitride filler has a hollow microsphere morphology with a size distribution of 1–300 μm; The iron nitride filler is composed of at least one of Fe3N and Fe4N.
3. The high-performance functional composite elastomer material according to claim 1, characterized in that: The thickness of the high-performance functional composite elastomer material is 0.5 mm to 10 mm; The high-performance functional composite elastomer material contains 45% to 55% iron nitride by mass.
4. A method for preparing a high-performance functional composite elastomer material, characterized in that... Includes the following steps: Step 1, preparation of iron nitride filler, namely the synthesis of iron nitride hollow microspheres, the specific method is as follows: Ethylene glycol, ferric chloride hexahydrate, polyethylene glycol, and urea were added to an organic solvent and stirred until homogeneous before undergoing a solvothermal reaction. The resulting product was centrifuged, washed, and dried. Finally, the product was subjected to a gas nitriding process to obtain iron nitride filler. Step 2: Polytetrahydrofuran diol, isocyanate, chain extender and catalyst are dispersed in an organic solvent for polymerization reaction. After the polymerization reaction is completed, the mixture is dried to obtain a self-healing thermoplastic polyurethane matrix. Step 3: Dissolve the self-healing thermoplastic polyurethane matrix obtained in Step 2 in tetrahydrofuran, and add the iron nitride filler obtained in Step 1. After stirring evenly, place it in a mold and dry to obtain a high-performance functional composite elastomer material.
5. The method for preparing a high-performance functional composite elastomer material according to claim 4, characterized in that: In step 1, the ratio of organic solvents ethylene glycol, ferric chloride hexahydrate, polyethylene glycol and urea is: 10-100mL: 50-100mL: 1-3g: 2-6g: 2-10g; In step 1, the organic solvent is one of N,N-dimethylformamide or N,N-dimethylacetamide, the solvothermal reaction temperature is 100℃~200℃, and the solvothermal reaction time is 10h~24h. In step 1, during the gas nitriding process, the nitriding temperature is 400℃~600℃, the nitriding time is 0.5~8h, and the atmosphere is ammonia.
6. The method for preparing a high-performance functional composite elastomer material according to claim 4, characterized in that: In step 2, the total mass of polytetrahydrofuran diol, isocyanate, chain extender, and catalyst is calculated as 100%. Specifically, the mass percentage of polytetrahydrofuran diol is 40%-70%; the mass percentage of isocyanate is 15%-40%; the mass percentage of chain extender is 10%-30%; and the mass percentage of catalyst is 0.1%-0.3%. The ratio of organic solvent to polytetrahydrofuran diol used in step 2 is 10-30 mL: 15 g.
7. The method for preparing a high-performance functional composite elastomer material according to claim 6, characterized in that: In step 2, the polytetrahydrofuran diol has a molecular weight of 600-3000, the isocyanate is at least one of toluene diisocyanate, diphenylmethane diisocyanate and isophorone diisocyanate, the chain extender is mainly at least one of dimethylglyoxime and 2,4-pentanedioxime, and the catalyst is dibutyltin dilaurate.
8. The method for preparing a high-performance functional composite elastomer material according to claim 7, characterized in that: In step 2, dimethylglyoxime, isophorone diisocyanate, dibutyltin dilaurate, and an organic solvent are added to a three-necked flask and reacted at 80-100°C for 1-6 hours. Then, the temperature of the reaction system is lowered to 60-80°C, polytetrahydrofuran diol is added, and the reaction continues for 1-6 hours. Isophorone diisocyanate is dissolved in an organic solvent and added to the three-necked flask, and the reaction is carried out for 12-24 hours. After drying, a self-healing thermoplastic polyurethane matrix is obtained. The drying temperature is 40-80°C, and the drying time is 48-96 hours.
9. The method for preparing a high-performance functional composite elastomer material according to claim 4, characterized in that: In step 3, the ratio of the self-healing thermoplastic polyurethane matrix to tetrahydrofuran is 1g:10mL; In step 3, the drying temperature is 40-80℃ and the drying time is 48-96h.
10. An application of a high-performance functional composite elastomer material, characterized in that: High-performance functional composite elastomer materials are applied to the shell surfaces of equipment such as aircraft and signal base stations.