Temperature-adjustable medical electromagnetic shielding composite material and preparation method thereof

Abstract

The application provides a temperature-adjustable medical electromagnetic shielding composite material and a preparation method thereof, and belongs to the technical field of medical treatment.The composite material comprises a CF / ASA electromagnetic shielding composite material, graphene and RGO&NiFe2O4 surface wave-absorbing coating, a three-dimensional Ti3C2 MXene electromagnetic shielding composite material, a magnetic field sensor, a temperature sensor, a signal processing unit and gallium-based liquid metal.The preparation method comprises the following steps: S1, preparing the CF / ASA electromagnetic shielding composite material;S2, preparing the graphene and RGO&NiFe2O4 surface wave-absorbing coating;S3, preparing the three-dimensional Ti3C2 MXene electromagnetic shielding composite material;and S4, compositing each layer and arranging the sensor and the gallium-based liquid metal.The application has excellent electromagnetic shielding performance, and can also adjust the electromagnetic shielding strength and temperature.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medicine, in particular to a temperature-adjustable medical electromagnetic shielding composite material and a preparation method thereof. BACKGROUND

[0002] With the development of society, the electronic products used in the medical field are increasing, especially active medical devices inside the human body. If they are affected by electromagnetic waves, it may affect their normal work, thereby endangering the health of patients. Therefore, the present application provides a temperature-adjustable medical electromagnetic shielding composite material and a preparation method thereof, which can effectively realize the shielding effect of electromagnetic waves and the control of environmental temperature. SUMMARY

[0003] The purpose of the present application is to provide a temperature-adjustable medical electromagnetic shielding composite material and a preparation method thereof.

[0004] To solve the above technical problems, the purpose of the present application is achieved as follows:

[0005] A temperature-adjustable medical electromagnetic shielding composite material comprises: a CF / ASA electromagnetic shielding composite material, a graphene and RGO&NiFe2O4 surface wave-absorbing coating, a three-dimensional Ti3C2 MXene electromagnetic shielding composite material, a magnetic field sensor, a temperature sensor, a signal processing unit and a gallium-based liquid metal.

[0006] The three-dimensional Ti3C2 MXene electromagnetic shielding composite material is provided with a plurality of cavities; the gallium-based liquid metal is filled in the cavities; the graphene and RGO&NiFe2O4 surface wave-absorbing coating is coated on the surface of the CF / ASA electromagnetic shielding composite material; the CF / ASA electromagnetic shielding composite material is two layers, and is fixedly connected to the two sides of the three-dimensional Ti3C2 MXene electromagnetic shielding composite material.

[0007] The magnetic field sensor is evenly distributed in the three-dimensional Ti3C2 MXene electromagnetic shielding composite material; the temperature sensor and the signal processing unit are arranged in the three-dimensional Ti3C2 MXene electromagnetic shielding composite material.

[0008] On the basis of the above scheme and as a preferred scheme of the above scheme, the number of cavities is four, arranged in a matrix.

[0009] On the basis of the above scheme and as a preferred scheme of the above scheme, the number of magnetic field sensors is four, arranged in a matrix; the four magnetic field sensors are arranged between adjacent two cavities.

[0010] As a preferred solution of the above solution, the temperature sensor and the signal processing unit are arranged at the center of the four magnetic field sensors.

[0011] As a preferred solution of the above solution, the CF / ASA electromagnetic shielding composite material is bonded with the three-dimensional Ti3C2 MXene electromagnetic shielding composite material through a TA / PEG / Lap composite material.

[0012] A preparation method of a temperature-adjustable medical electromagnetic shielding composite material, comprising the following steps:

[0013] S1, preparation of a CF / ASA electromagnetic shielding composite material;

[0014] S2, preparation of a graphene and RGO&NiFe2O4 surface wave-absorbing coating;

[0015] S3, preparation of a three-dimensional Ti3C2 MXene electromagnetic shielding composite material;

[0016] S4, composite of each layer, sensor and gallium-based liquid metal setting;

[0017] The step S1 comprises:

[0018] ① stirring: the CF carbon fiber with a fiber length of 5-10 mm and the ASA polymer resin are mixed according to the mass fraction of 25-30wt% and 65-75wt% respectively, and then the two are fully mixed by ultrasonic treatment to obtain a carbon fiber polymer resin mixture; ② heating and melting: the carbon fiber polymer resin mixture is heated and mixed using a double-screw extruder, and the heating temperature is 260-300℃; ③ extrusion forming: the composite material after heating and melting is extruded under the action of pressure to obtain a continuous profile with a cross-sectional diameter of 5mm circular section; ④ water cooling: the extruded composite material is quickly cooled and shaped by using a cooling liquid; ⑤ water removal: after shaping, the excess water on the surface of the composite material is removed; ⑥ granulation: after further removing the water, the composite material is processed into granular form using a granulator; ⑦ compression molding: the obtained granular material is high-temperature forged and pressed using a flat vulcanizing machine to obtain a CF / ASA electromagnetic shielding composite material with a thickness of 2mm;

[0019] The step S2 comprises:

[0020] ① 0.8-1wt% of graphene and 0.5-1wt% of RGO & NiFe2O4 powder are mixed with silicone resin and stirred uniformly to prepare a powdery solid; ② ethyl acetate is added, and the coating is stirred and dispersed in an ultrasonic field using a stirrer, at a stirring rate of 800-100 rpm / min, and for a stirring time of 6 h; ③ a curing agent is added, and after continuous stirring for 10 min, the coating is sprayed onto the surface of the CF / ASA electromagnetic shielding composite material by a spraying process to prepare a graphene and RGO@NiFe2O4 surface wave-absorbing coating, with a thickness of 1±0.5 mm;

[0021] The step S3 comprises:

[0022] ① 100-200 nm polymethyl methacrylate nanospheres are dispersed in deionized water to prepare a dispersion liquid with a concentration of 25 mg / mL, and ultrasonic treatment is performed for two hours; ② the Ti3C2 MXene nanosheet dispersion liquid is diluted to 2.5 mg / mL, and the solution is taken into a first container, and then 25 mg / mL of the dispersion liquid is slowly added dropwise, wherein the mass ratio of the polymethyl methacrylate nanospheres to the Ti3C2 MXene nanosheets is 2:1; the mixed liquid is ultrasonically treated in an ice bath for 1 h, and magnetically stirred at a rotation speed of 500-600 rpm for 2 h, and the black precipitate at the bottom is collected by centrifugation, and the black precipitate is vacuum dried for 48 h and then ground into powder; ③ the product obtained in step ② is placed in a second container, and is placed in a tube furnace, and is heated to 450℃ at a heating rate of 15℃ / min under Ar gas protection, and then is kept at 450℃ for 2 h to obtain Ti3C2 MXene hollow nanospheres; ④ the Ti3C2 MXene hollow nanospheres are dispersed in deionized water to prepare a dispersion liquid with a concentration of 20 mg / mL, 4 mL of the Ti3C2 MXene hollow nanosphere dispersion liquid is poured into a glass sand core funnel and is filtered, after the water in the first layer is filtered out, the above-mentioned mixed dispersion liquid is poured into the second layer, and after the water in the second layer is filtered out, 4 mL of the Ti3C2 MXene hollow nanosphere dispersion liquid is filtered into the third layer, and after the water in the whole film is filtered out, the filter membrane is taken out together, and vacuum freeze-drying is performed for 24 h to separate from the filter membrane, to obtain a three-dimensional Ti3C2 MXene electromagnetic shielding composite film material with a sandwich structure; then a cutting device is used to cut a plurality of through cavities and sensor accommodating grooves on the three-dimensional Ti3C2 MXene electromagnetic shielding composite film material;

[0023] The step S4 comprises:

[0024] ① a layer of CF / ASA electromagnetic shielding composite material is fixedly bonded to one side of the three-dimensional Ti3C2 MXene electromagnetic shielding composite material to form a semi-finished product, and the CF / ASA electromagnetic shielding composite material is used to block one end of the penetrating cavity to form a containing groove; ② the gallium-based liquid metal is introduced into the containing groove, and the volume of the introduced gallium-based liquid metal is half of the volume of the cavity; ③ the magnetic field sensor, the temperature sensor and the signal processing unit are placed in the sensor containing groove; ④ another layer of CF / ASA electromagnetic shielding composite material is fixedly bonded to the other side of the three-dimensional Ti3C2 MXene electromagnetic shielding composite material to form a finished product.

[0025] As a preferred scheme of the above scheme, the CF / ASA electromagnetic shielding composite material and the three-dimensional Ti3C2 MXene electromagnetic shielding composite material are bonded by a TA / PEG / Lap composite material adhesive; the TA / PEG / Lap composite material is prepared from tannic acid, PEG and magnesium lithium silicate at a mass ratio of 4-5:2.5-3:1-1.5.

[0026] The application has the following beneficial effects:

[0027] 1. The composite material has excellent electromagnetic shielding function, and the effect of electromagnetic shielding can be divided into four parts: ① reflection loss on the incident surface, mainly the CF / ASA electromagnetic shielding composite material; ② electromagnetic waves that are not reflected into the interior are absorbed and lost by the material, which is completed by the CF / ASA electromagnetic shielding composite material, the three-dimensional Ti3C2 MXene electromagnetic shielding composite material and the gallium-based liquid metal; ③ electromagnetic waves that enter the shielding body are reflected multiple times and lost by the internal material, which includes the reflection loss of the CF / ASA electromagnetic shielding composite material, the three-dimensional Ti3C2 MXene electromagnetic shielding composite material and the gallium-based liquid metal itself, the reflection loss of the CF / ASA electromagnetic shielding composite material, graphene and RGO@NiFe2O4 surface wave-absorbing coating, and the reflection loss of the electromagnetic shielding cavity formed by the gallium-based liquid metal under the action of the magnetic field sensor; ④ different spatial topological structures formed by the gallium-based liquid metal under the action of the magnetic field sensor absorb and reflect electromagnetic waves.

[0028] 2. The application can realize temperature control by changing the dissipation of electromagnetic waves in the interlayer, thereby indirectly controlling the temperature of the entire material. By changing the magnetic field distribution of the magnetic field sensor, the spatial arrangement of the gallium-based liquid metal is changed, and the shielding effect of the material on electromagnetic waves is changed by the spatial particle arrangement of different topological structures, so as to change the consumption of internal electromagnetic waves and indirectly control the heat energy generated by electromagnetic wave energy dissipation, thereby realizing the regulation of the overall environmental temperature. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 This is a schematic diagram of the composite material layer structure of the present invention.

[0030] Figure 2 This is a schematic diagram of the partially unfolded structure of the present invention.

[0031] Figure 3 This is a schematic diagram of the three-dimensional Ti3C2MXene electromagnetic shielding composite material structure of the present invention.

[0032] Figure 4 This is a schematic diagram of three different spatial arrangements of the gallium-based liquid metal of the present invention.

[0033] In the figure: 1. CF / ASA electromagnetic shielding composite material; 2. Graphene and RGO & NiFe2O4 surface absorbing coating; 3. Three-dimensional Ti3C2MXene electromagnetic shielding composite material; 4. Magnetic field sensor; 5. Temperature sensor and signal processing unit; 6. Gallium-based liquid metal; 7. Cavity. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] like Figures 1 to 3 As shown, a temperature-adjustable medical electromagnetic shielding composite material includes: CF / ASA electromagnetic shielding composite material 1, graphene and RGO & NiFe2O4 surface absorbing coating 2, three-dimensional Ti3C2MXene electromagnetic shielding composite material 3, magnetic field sensor 4, temperature sensor and signal processing unit 5, and gallium-based liquid metal 6.

[0036] The three-dimensional Ti3C2MXene electromagnetic shielding composite material 3 has several cavities 7, and gallium-based liquid metal 6 fills the cavities 7. Graphene and RGO & NiFe2O4 surface absorbing coatings 2 are coated on the surface of the CF / ASA electromagnetic shielding composite material 1. The CF / ASA electromagnetic shielding composite material 1 consists of two layers, fixedly connected to both sides of the three-dimensional Ti3C2MXene electromagnetic shielding composite material 3.

[0037] The CF / ASA electromagnetic shielding composite material 1 possesses good electromagnetic shielding properties, along with excellent mechanical properties and flexibility, allowing it to meet the shape requirements of various application scenarios. Furthermore, its internal carbon fiber distribution is relatively uniform, and the carbon fibers can interlock to form a good conductive network, thus contributing to its superior electromagnetic shielding performance.

[0038] In addition to its good electromagnetic shielding performance, the three-dimensional Ti3C2MXene electromagnetic shielding composite material also has the advantage of high density, which gives it good mechanical properties and can extend its service life.

[0039] Gallium has low biological toxicity and can be used in biomedical when combined with various drugs, thus having good safety. In addition, it can present different particle magnetic field arrangements under the control of the magnetic field sensor 4, as shown in Figure 4 , different particle arrangements have different electromagnetic shielding performance, thus realizing the adjustment of electromagnetic shielding performance.

[0040] The number of magnetic field sensors 4 is several, which are uniformly distributed inside the three-dimensional Ti3C2 MXene electromagnetic shielding composite material 3. The temperature sensor and signal processing unit 5 are arranged inside the three-dimensional Ti3C2 MXene electromagnetic shielding composite material 3. The magnetic field sensor 4 can change the magnetic field distribution of the composite material. The temperature sensor is used to monitor the temperature, and the signal processing unit is used to process the temperature signal and send a command to the magnetic field sensor 4.

[0041] The temperature sensor and signal processing unit 5 can detect the environmental temperature in real time. When the temperature is lower than or higher than the set threshold, the temperature sensor and signal processing unit 5 can adjust the magnetic field sensor 4, so as to adjust the particle arrangement of the gallium-based liquid metal 6, and then realize the adjustment of the environmental temperature.

[0042] Embodiment one:

[0043] As shown in Figure 1 , in this embodiment, the three-dimensional Ti3C2 MXene electromagnetic shielding composite material 3 is a rectangular structure, four through cavities 7 are arranged on it, and the four cavities 7 are arranged in a matrix.

[0044] At the same time, the number of magnetic field sensors 4 is four, which are arranged in a matrix, and the four magnetic field sensors 4 are arranged between adjacent two cavities 7. The temperature sensor and signal processing unit 5 are arranged at the center position of the four magnetic field sensors 4, which is also the center of the rectangular three-dimensional Ti3C2 MXene electromagnetic shielding composite material 3.

[0045] In addition, the CF / ASA electromagnetic shielding composite material 1 is bonded with the three-dimensional Ti3C 2 MXene electromagnetic shielding composite material 3 through the TA / PEG / Lap composite material. The TA / PEG / Lap composite material is simple to prepare, only needs simple three-phase stirring and blending, and can be self-cured by standing in the air. The TA / PEG / Lap composite material has plasticity and good adhesion before curing, and has less cytotoxicity and excellent biocompatibility.

[0046] A preparation method of a temperature-adjustable medical electromagnetic shielding composite material, comprising the following steps:

[0047] S1, preparing a CF / ASA electromagnetic shielding composite material;

[0048] S2, preparation of graphene and RGO@NiFe2O4 surface wave-absorbing coating;

[0049] S3, preparation of three-dimensional Ti3C2 MXene electromagnetic shielding composite material;

[0050] S4, layer-by-layer compounding and sensor and gallium-based liquid metal setting;

[0051] Step S1 comprises:

[0052] ①Stirring: the CF carbon fiber with a fiber length of 5-10 mm is mixed with the ASA polymer resin in a mass fraction of 25-30wt% and 65-75wt% respectively, and the two are fully mixed by ultrasonic treatment to obtain a carbon fiber polymer resin mixture; ②Heating and melting: the carbon fiber polymer resin mixture is heated and mixed using a double-screw extruder, and the heating temperature is 260-300℃; ③Extrusion forming: the composite material after heating and melting is extruded under the action of pressure to obtain a continuous profile with a cross-sectional diameter of 5mm circular section; ④Water cooling: the extruded composite material is quickly cooled and shaped by using a cooling liquid; ⑤Water removal: after shaping, remove the excess water on the surface of the composite material; ⑥Pelletizing: after further removing the water, the composite material is processed into granular form using a pelletizer; ⑦Press forming: the obtained granular material is high-temperature forged using a flat vulcanizing machine to obtain a CF / ASA electromagnetic shielding composite material with a thickness of 2mm;

[0053] Step S2 comprises:

[0054] ①Mixing 0.8-1wt% of graphene and 0.5-1wt% of RGO&NiFe2O4 powder with silicone resin and stirring uniformly to obtain a powdery solid; ②Add ethyl acetate and use a stirrer to stir and disperse the coating in an ultrasonic field, the stirring rate is 800-100rpm / min, and the stirring time is 6h; ③Add curing agent, continue stirring for 10min, and then spray the coating on the surface of the CF / ASA electromagnetic shielding composite material by spraying process to obtain a graphene and RGO@NiFe2O4 surface wave-absorbing coating with a thickness of 1±0.5mm;

[0055] Step S3 comprises:

[0056] ① 100-200 nm of polymethyl methacrylate nanospheres are dispersed in deionized water to prepare a dispersion liquid of 25 mg / mL, and ultrasonic treatment is performed for two hours; ② After the Ti3C2 MXene nanosheet dispersion liquid is diluted to 2.5 mg / mL, the solution is taken into a first container, and the 25 mg / mL dispersion liquid is slowly dropped into the first container, wherein the mass ratio of the polymethyl methacrylate nanospheres to the Ti3C2 MXene nanosheets is 2:1; the mixed liquid is ice-bath ultrasonic treated for 1 h, and magnetically stirred at a rotation speed of 500-600 rpm for 2 h, and the black precipitate at the bottom is collected by centrifugation, and the black precipitate is vacuum dried for 48 h and then ground into powder; ③ The product obtained in step ② is placed in a second container, and is heated to 450℃ at a heating rate of 15℃ / min in a tube furnace under Ar gas protection, and then is kept for 2 h to obtain Ti3C2 MXene hollow nanospheres; ④ The Ti3C2 MXene hollow nanospheres are dispersed in deionized water to prepare a dispersion liquid of 20 mg / mL, 4 mL of the Ti3C2 MXene hollow nanosphere dispersion liquid is poured into a glass sand core funnel for filtration, and after the water in the first layer is filtered out, the above mixed dispersion liquid is poured into the second layer for filtration, and after the water in the second layer is filtered out, 4 mL of the Ti3C2 MXene hollow nanosphere dispersion liquid is poured into the third layer for filtration, and after the water in the whole film is filtered out, the filter membrane is taken out together, and vacuum freeze-drying is performed for 24 h to separate from the filter membrane to obtain a three-dimensional Ti3C2 MXene electromagnetic shielding composite film material with a sandwich structure; then a cutting device is used to cut four penetrating rectangular cavities, four matrix-arranged magnetic field sensor accommodating grooves and a temperature sensor and signal processing unit accommodating groove on the three-dimensional Ti3C2 MXene electromagnetic shielding composite film material;

[0057] Step S4 comprises:

[0058] ① A layer of CF / ASA electromagnetic shielding composite material is fixedly bonded to one side of the three-dimensional Ti3C2 MXene electromagnetic shielding composite material to form a semi-finished product, and the CF / ASA electromagnetic shielding composite material is used to block one end of the penetrating cavity to form an accommodating groove; ② Gallium-based liquid metal is introduced into the accommodating groove, and the volume of the introduced gallium-based liquid metal is half of the volume of the cavity, and the excess cavity part can be used for reflection and consumption of electromagnetic waves, and can also be used for regulating the volume change of the liquid metal caused by temperature change to avoid the influence of the volume expansion of the liquid metal caused by heating on the performance of the composite material; ③ The magnetic field sensor and the temperature sensor and the signal processing unit are placed in the sensor accommodating groove; ④ Another layer of CF / ASA electromagnetic shielding composite material is fixedly bonded to the other side of the three-dimensional Ti3C2 MXene electromagnetic shielding composite material to form a finished product.

[0059] The CF / ASA electromagnetic shielding composite material and the three-dimensional Ti3C2 MXene electromagnetic shielding composite material are adhered by the TA / PEG / Lap composite adhesive; the TA / PEG / Lap composite adhesive is prepared by using tannic acid, PEG and magnesium lithium silicate in a mass ratio of 4-5:2.5-3:1-1.5.

[0060] The preferred embodiments of the present application are described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and changes without departing from the concept of the present application. Therefore, any technical solutions obtained by logical analysis, reasoning or limited experiments based on the prior art according to the concept of the present application should be within the protection scope defined by the claims.

Claims

1. A method for producing a temperature-regulated medical electromagnetic shielding composite material, characterized by, The temperature-adjustable medical electromagnetic shielding composite material includes: CF / ASA electromagnetic shielding composite material, graphene and RGO&NiFe2O4 surface absorbing coating, three-dimensional Ti3C2MXene electromagnetic shielding composite material, magnetic field sensor, temperature sensor and signal processing unit, and gallium-based liquid metal; The three-dimensional Ti3C2MXene electromagnetic shielding composite material has several cavities; the gallium-based liquid metal is filled in the cavities; the graphene and RGO & NiFe2O4 surface absorbing coatings are coated on the surface of the CF / ASA electromagnetic shielding composite material; the CF / ASA electromagnetic shielding composite material is a two-layer material, fixedly connected to both sides of the three-dimensional Ti3C2MXene electromagnetic shielding composite material. The magnetic field sensors are a plurality of those uniformly distributed inside the three-dimensional Ti3C2MXene electromagnetic shielding composite material; the temperature sensor and signal processing unit are disposed inside the three-dimensional Ti3C2MXene electromagnetic shielding composite material. The preparation method of the temperature-adjustable medical electromagnetic shielding composite material includes the following steps: Preparation of S1, CF / ASA electromagnetic shielding composite materials; Preparation of microwave absorbing coatings on S2, graphene, and RGO@NiFe2O4 surfaces; Preparation of S3, three-dimensional Ti3C2MXene electromagnetic shielding composite material; S4, composite layers, sensors, and gallium-based liquid metal setup; Step S1 includes: ① Mixing: CF carbon fibers with a fiber length of 5-10mm and ASA polymer resin are mixed at mass fractions of 25-30wt% and 65-75wt% respectively, and then ultrasonically treated to ensure thorough mixing to obtain a carbon fiber polymer resin mixture; ② Heating and Melting: The carbon fiber polymer resin mixture is heated and kneaded using a twin-screw extruder at a heating temperature of 260-300℃; ③ Extrusion Molding: The heated and melted composite material is extruded under pressure to obtain a continuous profile with a cross-sectional diameter of 5mm; ④ Water Cooling: The extruded composite material is rapidly cooled and shaped using a cooling liquid; ⑤ Dehydration: Excess moisture is removed from the surface of the composite material after sizing; ⑥ Pelletizing: After further removing moisture, the composite material is processed into granules using a pelletizer; ⑦ Press Molding: The obtained granular material is forged at high temperature using a flat vulcanizing machine to obtain a CF / ASA electromagnetic shielding composite material with a thickness of 2mm; Step S2 includes: ① Mix 0.8-1wt% graphene and 0.5-1wt% RGO & NiFe2O4 powder with silicone resin and stir until homogeneous to obtain a powdered solid; ② Add ethyl acetate and use a stirrer to disperse the coating in an ultrasonic field at a stirring rate of 800-100 rpm / min for 6 hours; ③ Add curing agent and continue stirring for 10 minutes. Then, spray the coating onto the surface of the CF / ASA electromagnetic shielding composite material to obtain a graphene and RGO@NiFe2O4 surface microwave absorbing coating with a thickness of 1±0.5 mm. Step S3 includes: ① 100-200nm of polymethyl methacrylate nanospheres are dispersed in deionized water to prepare a dispersion liquid of 25mg / mL, and ultrasonic treatment is performed for two hours; ② after the Ti3C2 MXene nanosheet dispersion liquid is diluted to 2.5mg / mL, the diluted Ti3C2 MXene nanosheet dispersion liquid is taken into a first container, and the 25mg / mL dispersion liquid is slowly dropped into the first container, wherein the mass ratio of the polymethyl methacrylate nanospheres to the Ti3C2 MXene nanosheets is 2:1; the mixed liquid is ice-bath ultrasonic treated for 1h, and is magnetically stirred at a rotating speed of 500-600rpm for 2h, and the black precipitate at the bottom is collected by centrifugation, and the black precipitate is vacuum dried for 48h and then ground into powder; ③ the product obtained in step ② is placed in a second container, and is heated to 450℃ at a heating rate of 15℃ / min in a tube furnace under Ar gas protection, and then is kept for 2h to obtain Ti3C2 MXene hollow nanospheres; ④ the Ti3C2 MXene hollow nanospheres are dispersed in deionized water to prepare a dispersion liquid of 20mg / mL, 4mL of the Ti3C2 MXene hollow nanosphere dispersion liquid is poured into a glass sand core funnel for suction filtration, the Ti3C2 MXene hollow nanosphere dispersion liquid is poured into the second layer after the water in the first layer is suctioned dry, 4mL of the Ti3C2 MXene hollow nanosphere dispersion liquid is poured into the third layer after the water in the second layer is suctioned dry, the whole film is suctioned dry, and then the filter membrane is taken out together, vacuum freeze-drying is performed for 24h, and then the filter membrane is separated to obtain a three-dimensional Ti3C2 MXene electromagnetic shielding composite film material with a sandwich structure; then a cutting device is used to cut a plurality of penetrating cavities and sensor accommodating grooves on the three-dimensional Ti3C2 MXene electromagnetic shielding composite film material; The step S4 comprises: ① a layer of CF / ASA electromagnetic shielding composite material is fixedly bonded on one side of the three-dimensional Ti3C2 MXene electromagnetic shielding composite material to form a semi-product, and the CF / ASA electromagnetic shielding composite material is used to block one end of the penetrating cavity to form an accommodating groove; ② gallium-based liquid metal is introduced into the accommodating groove, and the volume of the introduced gallium-based liquid metal is half of the volume of the cavity; ③ a magnetic field sensor, a temperature sensor and a signal processing unit are placed in the sensor accommodating groove; ④ another layer of CF / ASA electromagnetic shielding composite material is fixedly bonded on the other side of the three-dimensional Ti3C2 MXene electromagnetic shielding composite material to form a finished product.

2. The method for preparing a temperature-adjustable medical electromagnetic shielding composite material according to claim 1, characterized in that, The CF / ASA electromagnetic shielding composite material and the three-dimensional Ti3C2 MXene electromagnetic shielding composite material are bonded by a TA / PEG / Lap composite material adhesive; the TA / PEG / Lap composite material is prepared by using tannic acid, PEG and magnesium lithium silicate at a mass ratio of 4-5:2.5-3:1-1.

5.

3. The method for preparing a temperature-adjustable medical electromagnetic shielding composite material according to claim 1, characterized in that, The number of cavities is four, which are arranged in a matrix.

4. The method for preparing a temperature-adjustable medical electromagnetic shielding composite material according to claim 3, characterized in that, The number of magnetic field sensors is four, which are arranged in a matrix; the four magnetic field sensors are arranged between two adjacent cavities.

5. The method for preparing a temperature-adjustable medical electromagnetic shielding composite material according to claim 4, characterized in that, The temperature sensor and the signal processing unit are arranged at the center position of the four magnetic field sensors. The temperature sensor and the signal processing unit are arranged at the center position of the four magnetic field sensors.

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