A shape memory material and its preparation method

Abstract

This application discloses a shape memory material and its preparation method, belonging to the field of new materials technology. The technical solution is as follows: A shape memory material is obtained by mixing and vulcanizing polyether-modified silicone oil, acrylate silicone oil, vinyl silicone oil, and a high thermal conductivity filler in a mass ratio of 100:1 to 30:1 to 30:0.1 to 10. The polyether-modified silicone oil is a mixture of hydrogen-containing silicone oil modified from polyether raw materials and other hydrogen-containing silicone oils. The preparation method of the mixture of hydrogen-containing silicone oil modified from polyether raw materials is as follows: mixing excess hydrogen-containing silicone oil with polyether raw materials and heating for 2 to 8 hours in the presence of a catalyst. The polyether raw materials are selected from at least one of methyl allyl polyoxyethylene ether, allyl alcohol polyoxyethylene ether, methyl allyl alcohol polyoxyethylene ether, hydroxybutyl vinyl ether polyoxyethylene ether, and isopentenyl alcohol polyoxyethylene ether. The high thermal conductivity filler has a thermal conductivity greater than 0.5 W / (m·K). The shape memory material provided by this application possesses high memory performance, high biocompatibility, and good stability.

Description

Technical Field

[0001] This application relates to the field of memory material production technology, and in particular to a shape memory material and its preparation method. Background Technology

[0002] Shape memory materials, due to their "deformation-storage-recovery" properties, are widely used in medical, wearable, and other fields; however, existing technologies face three major challenges:

[0003] The inherent defects of "hard texture": In order to ensure the accuracy of stress storage and recovery, traditional shape memory materials (such as shape memory alloys and hard polymers) generally use highly cross-linked or highly rigid substrates. ShoreA hardness is mostly >50, which can easily cause friction discomfort when used close to the body / in the body, and may even cause skin damage or tissue irritation.

[0004] Insufficient biocompatibility: Some materials (such as polymers containing heavy metal catalyst residues) pose a risk of sensitization or rejection in vivo, and cannot meet the "skin-friendly and low-irritation" requirements for scenarios such as wound contact and implantation in vivo.

[0005] Triggering conditions are detached from the human body environment: Most shape memory materials rely on high temperature (>60℃), external pressure or chemical reagents to trigger recovery, which cannot be adapted to the normal temperature environment of the human body of about 37℃, thus limiting the application in scenarios such as minimally invasive medical care and dynamic wearables.

[0006] Poor stability with repeated use: After 3-5 deformation-recovery cycles, the stress storage capacity of traditional materials decreases by more than 30%, resulting in a high frequency of replacement of medical consumables and increased usage costs.

[0007] While silicone rubber has the advantages of being soft (Shore A hardness can be <40) and having good biocompatibility, existing silicone rubbers generally lack stable shape memory properties. Due to their loose cross-linking structure, they have weak stress storage capacity and a recovery rate of <80% after deformation. They cannot achieve both "flexible texture" and "memory precision", making it difficult to meet the requirements of the above-mentioned scenarios.

[0008] The problem this solution aims to solve is: how to provide a silicone rubber memory material with good shape memory capabilities. Summary of the Invention

[0009] The purpose of this invention is to provide a shape memory material that combines high memory accuracy, high biocompatibility, and good stability, in order to overcome the shortcomings of existing shape memory materials such as "hardness," insufficient biocompatibility, triggering conditions that are out of the human body environment, and poor stability after repeated use. This invention provides a shape memory silicone rubber that can have good memory accuracy at room temperature.

[0010] To achieve the above objectives, this application discloses a shape memory material, which is obtained by mixing and vulcanizing polyether modified silicone oil, acrylate silicone oil, vinyl silicone oil and high thermal conductivity filler in a mass ratio of 100:1 to 30:1 to 30:0.1 to 10.

[0011] The polyether-modified silicone oil is a mixture of hydrogen-containing silicone oil modified from polyether raw materials and other hydrogen-containing silicone oils.

[0012] The preparation method of the mixture of hydrogen-containing silicone oil modified with polyether raw material is as follows: mix excess hydrogen-containing silicone oil with polyether raw material and heat for 2-8 hours in the presence of catalyst.

[0013] The polyether raw material is selected from at least one of methyl allyl polyoxyethylene ether, allyl alcohol polyoxyethylene ether, methyl allyl alcohol polyoxyethylene ether, hydroxybutyl vinyl ether polyoxyethylene ether, and isopentenyl alcohol polyoxyethylene ether;

[0014] The thermal conductivity of the high thermal conductivity filler is greater than 0.5 W / (m·K).

[0015] Preferably, the preparation method of the hydrogen-containing silicone oil modified with polyether raw materials is as follows:

[0016] Excess hydrogen-containing silicone oil is mixed with polyether raw materials, a platinum-based catalyst is added, and the mixture is stirred and reacted in an inert gas environment at a temperature of 60–120°C for 2–8 hours. Then, low-boiling substances are removed and the mixture is filtered to obtain polyether-modified silicone oil.

[0017] The hydrogen content of the hydrogen-containing silicone oil is 0.3wt% to 2.0wt%.

[0018] The molecular weight of the polyether raw material is greater than or equal to 2000.

[0019] Preferably, the acrylate silicone oil includes single-end capped acrylate silicone oil and double-end capped acrylate silicone oil, and the mass ratio of single-end capped acrylate silicone oil to double-end capped acrylate silicone oil is 1-20:1-10.

[0020] The preparation method of the single-ended acrylate silicone oil is as follows: using a single-ended hydrogen-containing silicone oil with the other end inert and an acrylate monomer containing unsaturated double bonds as raw materials, it is prepared under the action of a catalyst and under heating.

[0021] The preparation method of the double-terminated acrylate silicone oil is as follows: using double-terminated hydrogen-containing silicone oil and acrylate monomers containing unsaturated double bonds as raw materials, it is prepared under the action of a catalyst and under heating.

[0022] Preferably, the vinyl silicone oil includes single-ended vinyl silicone oil and double-ended vinyl silicone oil, and the mass ratio of the single-ended vinyl silicone oil to the double-ended vinyl silicone oil is 1-20:1-10;

[0023] The preparation method of the single-terminated vinyl silicone oil is as follows: using single-terminated hydrogen-containing silicone oil and terminal vinyl-containing olefin monomers as raw materials, it is prepared under the catalysis of a catalyst and under heating.

[0024] The preparation method of the dual-terminated vinyl silicone oil is as follows: using dual-terminated hydrogen-containing silicone oil and terminally vinyl-containing olefin monomers as raw materials, it is prepared under the catalysis of a catalyst and under heating.

[0025] Preferably, the high thermal conductivity filler is selected from at least one of silver powder, copper powder, aluminum powder, alumina, aluminum nitride, boron nitride, graphene, and carbon nanotubes with a thermal conductivity greater than 0.5 W / (m·K).

[0026] Preferably, the specific surface area of ​​the high thermal conductivity filler is 5 m². 2 / g~300 m 2 / g.

[0027] Preferably, the polyether raw material is selected from at least one of methyl allyl polyoxyethylene ether, allyl alcohol polyoxyethylene ether, methyl allyl alcohol polyoxyethylene ether, hydroxybutyl vinyl ether polyoxyethylene ether, and isopentenyl alcohol polyoxyethylene ether, with a molecular weight of 2000 to 8000.

[0028] In addition, this application also discloses a method for preparing the above-mentioned shape memory material, which involves mixing polyether-modified silicone oil, acrylate silicone oil, vinyl silicone oil and high thermal conductivity filler and vulcanizing to obtain the shape memory material.

[0029] Preferably, polyether-modified silicone oil, acrylate silicone oil, vinyl silicone oil and high thermal conductivity filler are stirred and mixed at 25-40°C, and then placed in an environment of 80-120°C and 0.5MPa-10MPa for 30-60 minutes and cooled to obtain shape memory material.

[0030] The beneficial effects of this application are:

[0031] This application utilizes polyether-modified silicone oil to introduce crystallizable polyether segments, constructing a reversibly crystalline phase to achieve shape memory properties. Simultaneously, the mixing of hydrogen-containing silicone oil and polyether-modified silicone oil facilitates the introduction of acrylate silicone oil and vinyl silicone oil to regulate the hardness and properties of the silicone. Furthermore, by adjusting the ratio of single-endopeptide to double-endopeptide silicone oil and the ratio of single-endopeptide to double-endopeptide silicone oil, the crosslinking structure can be controlled, achieving regulation of mechanical and shape memory properties. In particular, when the crosslinking structure is appropriate, bidirectional shape memory properties can also be achieved. In addition, further selection of high thermal conductivity fillers can improve the thermal response speed of the silicone material, which is particularly beneficial for achieving sensitive bidirectional shape memory properties. The aforementioned shape memory material possesses high memory accuracy, high biocompatibility, and good stability, overcoming the shortcomings of existing shape memory materials such as insufficient biocompatibility, triggering conditions outside the human body environment, and poor stability after repeated use. It provides a shape memory silicone rubber with high memory accuracy that can be triggered for shape recovery at room temperature (around 37°C). Detailed Implementation

[0032] The present invention will now be clearly and completely described in conjunction with embodiments thereof. It should be noted that, unless specific conditions are specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents or instruments whose manufacturers are not specified are all commercially available conventional products.

[0033] Raw material information:

[0034] The hydrogen-containing silicone oil was purchased from Hubei Longsheng Sihai New Materials Co., Ltd., with a hydrogen content of 0.3wt% to 2.0wt%.

[0035] The single-hydroxyl-terminated silicone oil was purchased from Hubei Daer Ziguang Imine New Material Co., Ltd., with a viscosity of 4000 cst.

[0036] The hydroxyl-terminated silicone oil was purchased from Shandong Beigebao New Material Co., Ltd., with a viscosity of 4000 cst.

[0037] The chloroplatinic acid hexahydrate catalyst was purchased from Shanghai Maclean Biochemical Technology Co., Ltd.

[0038] Vinyltrimethoxysilane was purchased from Shandong Huachen New Material Co., Ltd., and its trade name is silane coupling agent-KH171.

[0039] Methylvinyldimethoxysilane was purchased from Zhongshan Dixin Chemical Co., Ltd., CAS No. 16753-62-1;

[0040] 3-(methacryloyloxy)propyltrimethoxysilane was purchased from Guangdong Dingfeng Chemical Co., Ltd., CAS No. 2530-85-0;

[0041] The silver powder was purchased from Shenzhen Yumingjie Technology Co., Ltd., with a particle size of 200-1000 mesh.

[0042] The graphene was purchased from Guangdong Yina Technology Co., Ltd., with a specific surface area of ​​20-50 square meters per gram.

[0043] The carbon nanotubes were purchased from Shanghai Xiangtian Nanomaterials Co., Ltd.

[0044] Methyl allyl polyoxyethylene ether was purchased from Shanghai Minke New Materials Co., Ltd., with a molecular weight of 2000-8000;

[0045] Allyl alcohol polyoxyethylene ether was purchased from Shanghai Maclean Biochemical Technology Co., Ltd., CAS number 27274-31-3, with a molecular weight of 2000-8000.

[0046] Methyl allyl alcohol polyoxyethylene ether was purchased from Shanghai Maclean Biochemical Technology Co., Ltd., CAS No. 31497-33-3, with a molecular weight of 2000-8000;

[0047] Pretreatment of some raw materials in the experiment

[0048] The preparation method of the single-terminated acrylate silicone oil is as follows: using single-terminated hydroxyl silicone oil as raw material A and 3-(methacryloyloxy)propyltrimethoxysilane as raw material B, they are mixed at a mass ratio of 120:1.0, and dibutyltin dilaurate is used as a catalyst (the ratio of the amount added to the total mass of the raw materials is 0.1:100). The mixture is stirred and reacted for 6 hours in an inert gas environment at a temperature of 90°C.

[0049] The preparation method of the dual-terminated acrylate silicone oil is as follows: using dihydroxy silicone oil as raw material A and 3-(methacryloyloxy)propyltrimethoxysilane as raw material B, they are mixed at a mass ratio of 120:2, and dibutyltin dilaurate is used as a catalyst (the ratio of the amount added to the total mass of the raw materials is 0.1:100). The mixture is stirred and reacted for 6 hours in an inert gas environment at a temperature of 90°C.

[0050] The preparation method of the single-terminated vinyl silicone oil is as follows: using single-terminated hydroxyl-containing silicone oil as raw material A and methyl vinyl dimethoxysilane as raw material B, they are mixed at a mass ratio of 325:1, and dibutyltin dilaurate is used as a catalyst (the ratio of the amount added to the total mass of the raw materials is 0.1:100). The mixture is stirred and reacted for 6 hours in an inert gas environment at a temperature of 90°C.

[0051] The preparation method of the dual-terminated vinyl silicone oil is as follows: using silicone oil with dual hydroxyl-containing ends as raw material A and methyl vinyl dimethoxysilane as raw material B, they are mixed in a mass ratio of 325:1.5, and dibutyltin dilaurate is used as a catalyst (the ratio of the amount added to the total mass of the raw materials is 0.1:100). The mixture is stirred and reacted for 6 hours in an inert gas environment at a temperature of 90°C.

[0052] The preparation method of hydrogen-containing silicone oil modified from polyether raw materials is as follows:

[0053] Hydrogen-containing silicone oil (hydrogen content of 0.36 wt%) and methyl allyl polyoxyethylene ether (molecular weight of 2400) were mixed at a mass ratio of 25:80. Chloroplatinic acid hexahydrate (addition amount to total raw material mass ratio of 0.02:100) was added. The mixture was stirred and reacted for 5 hours in an inert gas environment at 90°C. Then, low-boiling substances were removed and the mixture was filtered to obtain polyether-modified silicone oil.

[0054] Example 1

[0055] Step 1: Add 100 parts of polyether modified silicone oil, 15 parts of double-terminated acrylate silicone oil, and 15 parts of double-terminated vinyl silicone oil to a high-speed mixer and stir at 35°C for 15 minutes until homogeneous; then add 5 parts of silver powder and continue stirring for 25 minutes to obtain a premix.

[0056] Step 2: Place the premixed material into a flat vulcanizing machine and vulcanize it for 45 minutes at a temperature of 165℃ and a pressure of 12MPa. Then cool it to room temperature to obtain shape memory silicone rubber.

[0057] Example 2

[0058] Step 1: Add 100 parts of polyether modified silicone oil, 1 part of double-terminated acrylate silicone oil, and 29 parts of double-terminated vinyl silicone oil to a high-speed mixer and stir at 25°C for 20 minutes until homogeneous; then add 10 parts of silver powder and continue stirring for 30 minutes to obtain a premix.

[0059] Step 2: Place the premixed material into a flat vulcanizing machine and vulcanize it for 60 minutes at a temperature of 150℃ and a pressure of 20MPa. Then cool it to room temperature to obtain shape memory silicone rubber.

[0060] Example 3

[0061] Step 1: Add 100 parts of polyether modified silicone oil, 29 parts of double-terminated acrylate silicone oil, and 1 part of double-terminated vinyl silicone oil to a high-speed mixer and stir at 40°C for 10 minutes until homogeneous; then add 8 parts of silver powder and continue stirring for 15 minutes to obtain a premix.

[0062] Step 2: Place the premixed material into a flat vulcanizing machine and vulcanize it for 30 minutes at a temperature of 180℃ and a pressure of 5MPa. Then cool it to room temperature to obtain shape memory silicone rubber.

[0063] Example 4

[0064] This is essentially the same as Example 1, except that a single-end acrylate silicone oil is used instead of a double-end acrylate silicone oil.

[0065] Example 5

[0066] The example is basically the same as Example 1, except that a mixture of single-end capped acrylate silicone oil and double-end capped acrylate silicone oil is used instead of double-end capped acrylate silicone oil, and the mass ratio of single-end capped acrylate silicone oil to double-end capped acrylate silicone oil is 1:1.

[0067] Example 6

[0068] The example is essentially the same as in Example 1, except that allyl alcohol polyoxyethylene ether is used instead of methyl allyl polyoxyethylene ether.

[0069] Example 7

[0070] The example is essentially the same as in Example 1, except that methyl allyl polyoxyethylene ether is used instead of methyl allyl polyoxyethylene ether.

[0071] Example 8

[0072] The method is basically the same as in Example 1, except that a mixture of methyl allyl polyoxyethylene ether and allyl alcohol polyoxyethylene ether is used instead of methyl allyl polyoxyethylene ether, and the mass ratio of methyl allyl polyoxyethylene ether to allyl alcohol polyoxyethylene ether is 1.5:1.

[0073] Example 9

[0074] It is basically the same as Example 1, except that carbon nanotubes are used instead of silver powder.

[0075] Example 10

[0076] It is basically the same as Example 1, except that graphene is used instead of silver powder.

[0077] Example 11

[0078] The method is basically the same as in Example 1, except that a mixture of carbon nanotubes and graphene is used instead of silver powder, and the mass ratio of carbon nanotubes to graphene is 2:1.

[0079] Comparative Example 1

[0080] Step 1: Add 100 parts of polyether modified silicone oil and 30 parts of double-terminated vinyl silicone oil to a high-speed mixer and stir at 35°C for 15 minutes until homogeneous; then add 5 parts of silver powder and continue stirring for 25 minutes to obtain a premix.

[0081] Step 2: Place the premixed material into a flat vulcanizing machine and vulcanize it for 45 minutes at a temperature of 165℃ and a pressure of 12MPa. Then cool it to room temperature to obtain shape memory silicone rubber.

[0082] Comparative Example 2

[0083] Step 1: Add 100 parts of polyether modified silicone oil and 30 parts of double-terminated acrylate silicone oil to a high-speed mixer and stir at 35°C for 15 minutes until homogeneous; then add 5 parts of silver powder and continue stirring for 25 minutes to obtain a premix.

[0084] Step 2: Place the premixed material into a flat vulcanizing machine and vulcanize it for 45 minutes at a temperature of 165℃ and a pressure of 12MPa. Then cool it to room temperature to obtain shape memory silicone rubber.

[0085] Comparative Example 3

[0086] It is basically the same as Example 1, except that hydrogen-containing silicone oil is used instead of the hydrogen-containing silicone oil modified with polyether raw materials.

[0087] Comparative Example 4

[0088] The method is basically the same as in Example 1, except that the preparation method of the hydrogen-containing silicone oil modified with polyether raw materials is as follows:

[0089] Hydrogen-containing silicone oil (hydrogen content of 0.36 wt%) and methyl allyl polyoxyethylene ether (molecular weight of 2400) were mixed at a mass ratio of 20:80. Chloroplatinic acid hexahydrate (addition amount to total raw material mass ratio of 0.02:100) was added, and the mixture was stirred and reacted for 5 hours in an inert gas environment at 90°C. Then, the low-boiling point was removed and the mixture was filtered to obtain polyether-modified silicone oil.

[0090] Performance testing

[0091] Test method:

[0092] Differential Scanning Calorimetry (DSC): DSC is used to determine the melting temperature (Tm). A differential scanning calorimeter is used to test the thermal properties of polymer materials within a specific temperature range, under nitrogen protection at a flow rate of 40 mL / min. 10 mg of the sample is dried in a 60℃ electric heating oven for 2 hours, then pressed into a pellet in an aluminum crucible. The test is performed according to a preset heating and cooling program, and the DSC curve is recorded to determine the melting temperature (Tm) of the sample.

[0093] Shape memory test: The material was cut into strips with dimensions of 15mm in length, 5mm in width, and 0.5mm in thickness, and tested using a Q800 dynamic thermomechanical analyzer. The control force mode was selected, and the test was started under a pre-force of 0.001N. The deformation, shape retention rate, and shape recovery rate of the strips were recorded.

[0094] Mechanical property testing: The tensile strength and tensile strain at break of the material were tested using a CMT 4204 universal testing machine. The tensile testing rate was 20 mm / min, following the GB / T 17037.1-1997 standard. The test results are shown in Table 1.

[0095] Table 1: Performance Test Data

[0096] Group Shape fixation rate (%) Shape recovery rate (%) Tensile strength (MPa) Elongation at break (%) Crystallization melting temperature (Tm, °C) Example 1 85 93 5.2 215 60.4 Example 2 89 90 4.3 153 63.2 Example 3 88 91 5.6 228 58.9 Example 4 90 88 4.5 259 64.1 Example 5 89 91 5.3 225 62.5 Example 6 83 92 4.6 198 58.2 Example 7 82 90.5 4.4 312 55.6 Example 8 87 96 4.5 268 56.4 Example 9 86 92 6.0 218 62.5 Example 10 85 94 5.9 209 61.8 Example 11 92 98 6.0 223 62.1 Comparative Example 1 87 85 3.8 195 63.4 Comparative Example 2 89 86 5.8 190 59.2 Comparative Example 3 / / / / / Comparative Example 4 / / / / /

[0097] Results analysis:

[0098] 1. As can be seen from Examples 1-3, after adjusting the mass ratio of acrylate silicone oil and vinyl silicone oil in the raw materials, the shape recovery rate of Examples 1-3 fluctuated, but the overall fluctuation range was relatively low.

[0099] Further observation of Examples 4-5 shows that when single-end acrylate silicone oil is used instead of double-end acrylate silicone oil, the tensile strength decreases, but the elongation at break increases. In Example 5, when a mixture of single-end acrylate silicone oil and double-segment acrylate silicone oil is used, the tensile strength is basically the same as in Example 1, but the elongation at break increases to some extent.

[0100] 2. As can be seen from Examples 1 and 6-8, when other polyether raw materials are used to modify the hydrogen-containing silicone oil, the shape fixation rate and recovery rate of Examples 6-7 both decline.

[0101] However, further observation of Example 8 shows that when the polyether raw materials of Examples 6 and 7 are used to modify the hydrogen-containing silicone oil, the shape fixation rate and recovery rate of Example 8 increase. The reason may be that when polyethers with different reactivity are used to modify the hydrogen-containing silicone oil, a chemical network with "rigidity and flexibility" is constructed at the molecular level. The high-activity polyether constructs stable cross-linking points to ensure the shape fixation rate, while the low-activity polyether introduces flexible hanging chains to promote chain segment movement and thus improve the recovery rate.

[0102] 3. Observation of Examples 1 and 9-11 shows that when carbon nanotubes or graphene are used to replace silver powder, the data of Examples 9-10 and Example 1 fluctuate, but the amplitude is small.

[0103] When a mixture of carbon nanotubes and graphene is used as a filler, the shape fixation rate and recovery rate of Example 11 are improved. The reason for this phenomenon may be that when carbon nanotubes or graphene are used alone, their respective "aggregation" characteristics lead to structural defects and impaired performance. However, when both are used at the same time, they form a more uniform and dense physical cross-linked network through the structural complementarity of "graphene sheets-carbon nanotube rods", which in turn improves the shape fixation rate and recovery rate of the final silicone rubber.

[0104] 4. Observation of Example 1 and Comparative Examples 1-2 shows that when only vinyl silicone oil or acrylate silicone oil is used in the shape memory silicone rubber, the shape recovery rate and tensile breaking rate of Comparative Examples 1-2 are significantly lower than those of Example 1.

[0105] When Comparative Examples 3-4 used unmodified hydrogen-containing silicone oil or completely modified hydrogen-containing silicone oil to replace the mixture of hydrogen-containing silicone oil and polyether-modified silicone oil in Example 1, the shape fixation rate and shape recovery rate of Comparative Examples 3-4 decreased significantly compared to Example 1. The reason for this phenomenon may be that the silicone rubber prepared in Comparative Example 3 exhibits a certain fluid state and cannot be fixed, so it has no application prospect and its performance was not further tested. The silicone rubber prepared in Comparative Example 4 has too high hardness and cannot undergo effective deformation at 70°C, so it is not suitable for the preparation of biological memory materials.

Claims

1. A shape memory material, characterized in that, It is obtained by mixing and vulcanizing polyether modified silicone oil, acrylate silicone oil, vinyl silicone oil and high thermal conductivity filler in a mass ratio of 100:1~30:1~30:0.1~10; The polyether-modified silicone oil is a mixture of hydrogen-containing silicone oil modified from polyether raw materials and other hydrogen-containing silicone oils. The preparation method of the mixture of hydrogen-containing silicone oil modified with polyether raw material is as follows: mix excess hydrogen-containing silicone oil with polyether raw material and heat for 2-8 hours in the presence of catalyst. The polyether raw material is selected from at least one of methyl allyl polyoxyethylene ether, allyl alcohol polyoxyethylene ether, methyl allyl alcohol polyoxyethylene ether, hydroxybutyl vinyl ether polyoxyethylene ether, and isopentenyl alcohol polyoxyethylene ether; The thermal conductivity of the high thermal conductivity filler is greater than 0.5 W / (m·K).

2. The shape memory material according to claim 1, characterized in that, The preparation method of the hydrogen-containing silicone oil modified with polyether raw materials is as follows: Excess hydrogen-containing silicone oil is mixed with polyether raw materials, a platinum-based catalyst is added, and the mixture is stirred and reacted in an inert gas environment at a temperature of 60–120°C for 2–8 hours. Then, low-boiling substances are removed and the mixture is filtered to obtain polyether-modified silicone oil. The hydrogen content of the hydrogen-containing silicone oil is 0.3wt% to 2.0wt%. The molecular weight of the polyether raw material is greater than or equal to 2000.

3. The shape memory material according to claim 1, characterized in that, The acrylate silicone oil includes single-end capped acrylate silicone oil and double-end capped acrylate silicone oil, and the mass ratio of single-end capped acrylate silicone oil to double-end capped acrylate silicone oil is 1-20:1-10. The preparation method of the single-ended acrylate silicone oil is as follows: using a single-ended hydrogen-containing silicone oil with the other end inert and an acrylate monomer containing unsaturated double bonds as raw materials, it is prepared under the action of a catalyst and under heating. The preparation method of the double-terminated acrylate silicone oil is as follows: using double-terminated hydrogen-containing silicone oil and acrylate monomers containing unsaturated double bonds as raw materials, it is prepared under the action of a catalyst and under heating.

4. The shape memory material according to claim 1, characterized in that, The vinyl silicone oil includes single-end vinyl silicone oil and double-end vinyl silicone oil, and the mass ratio of the single-end vinyl silicone oil to the double-end vinyl silicone oil is 1-20:1-10. The preparation method of the single-terminated vinyl silicone oil is as follows: using single-terminated hydrogen-containing silicone oil and terminal vinyl-containing olefin monomers as raw materials, it is prepared under the catalysis of a catalyst and under heating. The preparation method of the dual-terminated vinyl silicone oil is as follows: using dual-terminated hydrogen-containing silicone oil and terminally vinyl-containing olefin monomers as raw materials, it is prepared under the catalysis of a catalyst and under heating.

5. The shape memory material according to claim 1, characterized in that, The high thermal conductivity filler is selected from at least one of silver powder, copper powder, aluminum powder, alumina, aluminum nitride, boron nitride, graphene, and carbon nanotubes with a thermal conductivity greater than 0.5 W / (m·K).

6. The shape memory material according to claim 1, characterized in that, The specific surface area of ​​the high thermal conductivity filler is 5m². 2 / g~300 m 2 / g.

7. The shape memory material according to claim 1, characterized in that, The polyether raw material is selected from at least one of methyl allyl polyoxyethylene ether, allyl alcohol polyoxyethylene ether, methyl allyl alcohol polyoxyethylene ether, hydroxybutyl vinyl ether polyoxyethylene ether, and isopentenyl alcohol polyoxyethylene ether, with a molecular weight of 2000 to 8000.

8. A method for preparing the shape memory material according to any one of claims 1-7, characterized in that, Shape memory materials are obtained by mixing and vulcanizing polyether-modified silicone oil, acrylate silicone oil, vinyl silicone oil and high thermal conductivity filler.

9. The method for preparing the shape memory material according to claim 8, characterized in that, Polyether-modified silicone oil, acrylate silicone oil, vinyl silicone oil and high thermal conductivity filler are stirred and mixed at 25-40°C, and then placed in an environment of 80-120°C and 0.5MPa-10MPa for 30-60 minutes for curing and cooling to obtain shape memory material.