A method for preparing electrically excitable conductive flexible weavable infrared materials

Abstract

The present application relates to the technical field of light flexible infrared material, and discloses a preparation method of electrically excited conductive flexible weavable infrared material, comprising the following steps: step one, preparing an infrared material slurry: mixing and defoaming infrared material, conductive precursor powder, binder and solvent to obtain a mixed slurry; step two, wet spinning; the mass ratio of the infrared material, conductive precursor powder, binder and solvent is (5-10):(0.05-1):(0.5-1.5):(6-20). The present application adopts the wet spinning process technology with porous carbon black as the conductive component, and the spun conductive yarn has elasticity and certain good mechanical properties; the combination with the infrared material forms a composite material to form an infrared emission interface and improve the infrared emission intensity.

Description

Technical Field

[0001] This invention relates to the field of lightweight flexible infrared materials technology, specifically to a method for preparing an electrically excited conductive flexible weaveable infrared material. Background Technology

[0002] With the continuous advancement of technology, infrared emitting materials have shown broad application prospects in multiple fields, covering smart textiles, military stealth, medical monitoring, and more. Weaveable conductive infrared emitting materials not only possess excellent electrical conductivity and infrared emission properties, but also combine the flexibility and comfort of textile materials, significantly expanding their application potential in various complex scenarios.

[0003] Firstly, in the field of health monitoring, the key is how to achieve real-time monitoring of critical physiological indicators (such as heart rate and body temperature). Weaveable conductive infrared emitting materials can be integrated into smart wearable devices, helping medical institutions or individuals to non-invasively monitor human health through infrared sensing technology. Simultaneously, combined with big data and artificial intelligence algorithms, health problems can be predicted and warned of more accurately, improving quality of life and comfort.

[0004] In the field of military stealth technology, the application of woven infrared-emitting materials is mainly focused on evading infrared detection, thereby enhancing battlefield survivability. By controlling the infrared emission characteristics of the material, the radiation signal of the target in the infrared band can be effectively reduced, thus avoiding detection by thermal imaging equipment. This technology is particularly important for stealth warfare and surprise attacks on the modern battlefield, greatly improving the concealment and combat effectiveness of military equipment.

[0005] However, current traditional infrared emitting materials face many technical challenges:

[0006] 1. Poor flexibility and comfort: Traditional infrared materials are mostly rigid structures, lacking flexibility, and are not suitable for applications requiring skin contact or dynamic deformation. For example, conventional infrared emitting materials are difficult to integrate into wearable devices or smart textiles, failing to achieve the comfort and flexibility needed for natural contact with the human body.

[0007] 2. Poor conductivity: Many traditional infrared emitting materials lack good conductivity, making it difficult to achieve infrared emission under electrical excitation. This limits their applications and prevents real-time controllable adjustment of infrared emission by combining current or voltage.

[0008] 3. Poor low-temperature performance: Existing infrared materials have insufficient infrared radiation intensity at low temperatures, making it impossible to effectively emit infrared waves. This greatly limits their application in extreme temperature environments (such as cold weather or space conditions).

[0009] 4. Limited wavelength selectivity: Traditional materials typically have a narrow infrared emission band, making it difficult to cover a wide range of infrared wavelengths. This limits their application in different scenarios, such as medical monitoring, night vision equipment, and multi-band imaging, which have varying requirements, resulting in insufficient adaptability of these materials.

[0010] 5. Poor thermal stability: Some traditional infrared materials are prone to performance degradation during prolonged or high-temperature use. In particular, poor thermal stability can cause their infrared emission performance to decline over time, affecting their reliability and durability in long-term applications.

[0011] 6. Prone to oxidation: Many infrared materials are susceptible to oxidation, especially when exposed to air or high temperatures. This can lead to surface degradation, reducing their infrared emission efficiency and lifespan.

[0012] 7. High processing complexity and cost: The manufacturing process of some high-performance infrared materials is complex and costly, making large-scale application or promotion difficult. Furthermore, their structures are difficult to integrate with other functional materials, limiting the development and application of composite functional materials.

[0013] Therefore, it is of great significance to develop a new type of flexible infrared emitting material that avoids the problems of poor flexibility, conductivity, low-temperature performance, and narrow infrared emission band in existing technologies. Summary of the Invention

[0014] The present invention aims to provide a method for preparing an electrically induced conductive flexible woven infrared material, in order to solve the problems of poor flexibility, conductivity and low-temperature performance, and narrow infrared emission band in existing infrared materials.

[0015] To achieve the above objectives, the present invention adopts the following technical solution: a method for preparing an electrically excited conductive flexible weaveable infrared material, comprising the following steps:

[0016] Step 1: Preparation of infrared material slurry: Mix infrared material, conductive precursor powder, binder and solvent and degas to obtain mixed slurry;

[0017] Step 2: Wet spinning.

[0018] Preferably, as an improvement, in step one, the mass ratio of infrared material, conductive precursor powder, binder and solvent is (5-10):(0.05-1):(0.5-1.5):(6-20).

[0019] Preferably, as an improvement, in step one, the infrared material is at least one of gallium arsenide, gallium aluminum arsenide, and AB2O4.

[0020] Preferably, as an improvement, in step one, the conductive precursor powder is silver nanowires, conductive carbon black, or graphene.

[0021] Preferably, as an improvement, in step one, the adhesive is at least one of polyvinylidene fluoride, thermoplastic polyurethane elastomer, epoxy resin, and polyimide.

[0022] Preferably, as an improvement, in step one, the solvent is N-methylpyrrolidone or dimethylformamide.

[0023] Preferably, as an improvement, in step two, during wet spinning, the mixed slurry is mixed with the functional core material and spun, coagulated, plasticized, and packaged.

[0024] Preferably, as an improvement, the functional core material is at least one of carbon fiber filaments, metal filaments, and 3D printing materials.

[0025] Preferably, as an improvement, in step two, the coagulation bath includes anhydrous ethanol and ultrapure water, the purity of the anhydrous ethanol is 90-99.99%, the resistivity of the ultrapure water is greater than 18 MΩ·cm, and the temperature of the coagulation bath is 50-70℃; the plasticizing bath includes sulfuric acid and sodium sulfate, and the temperature of the plasticizing bath is 70-90℃; the nozzle orifice of the wet spinning is 200-2000 μm, and the slurry injection speed is (1-3) mL / h.

[0026] Preferably, as an improvement, the flexible braidable infrared material prepared by an electrically excited conductive flexible braidable infrared material can be applied in the fields of infrared emission and biomedical science.

[0027] The principle and advantages of this solution are as follows: In practical applications, this technical solution addresses the problems of poor flexibility, conductivity, low-temperature performance, and narrow infrared emission bands of existing infrared materials. The inventors have comprehensively optimized the material composition and preparation process. Firstly, in terms of material composition, the reasonable combination of infrared materials and conductive precursors ensures the conductivity and infrared emission performance of the flexible woven infrared material. In particular, the surface plasmon polariton effect of these material combinations further optimizes the infrared emission performance, forming a novel quantum interface infrared emitting material. In the optimization of binders and solvents, polyvinylidene fluoride (PVDF) and thermoplastic polyurethane elastomers (TPU) not only have good adhesion but also enhance the mechanical properties and flexibility of the fibers, while not significantly affecting the conductivity of the infrared emitting material after being prepared into filaments. Simultaneously, infrared radiation can synchronously excite the infrared emission of these materials, forming synergistic excitation. Polar interactions may occur between oxygen atoms in DMF molecules and fluorine atoms in PVDF molecular chains; this interaction helps stabilize the dispersion state of PVDF in DMF solution. When PVDF dissolves in DMF, the intermolecular forces, such as van der Waals forces and hydrogen bonds, may be affected, leading to changes in the arrangement and crystal morphology of the PVDF molecular chains, which is more conducive to the dissolution and function of PVDF. Furthermore, the selection of functional core materials enhances the mechanical properties of flexible materials, while the appropriate physical bonding method can excite resonance effects to further enhance and optimize infrared emission performance.

[0028] In summary, the beneficial effects of this technical solution are as follows:

[0029] 1. This invention uses porous carbon black as the conductive component and employs a wet spinning process to produce conductive yarns that are elastic and possess certain good mechanical properties. When combined with infrared materials to form a composite material, it creates an infrared emission interface, thereby increasing the infrared emission intensity.

[0030] 2. The microstructure of the elastic conductive wire prepared by this invention has porous characteristics. The porous structure gives the material a large specific surface area, which helps infrared emission.

[0031] 3. The conductive fabric prepared by this invention has the characteristics of being lightweight and having good flexibility.

[0032] 4. The porous elastic conductive infrared emitting fabric prepared by this invention has a simple preparation process and low cost. At the same time, the prepared fabric has good mechanical properties and good infrared emitting performance. Furthermore, the conductive filaments are prepared by wet spinning, which solves the problem that traditional infrared emitting materials are usually rigid, which limits their use in wearable devices and flexible electronic devices.

[0033] The material obtained by this preparation method has the following important characteristics and advantages:

[0034] (1) Excellent conductivity: By optimizing the composite design of cellulose coating and infrared materials, a highly efficient conductive network is formed. The highly conductive textile fibers can transmit electrical signals during wear. Combined with electronic devices, it can realize real-time monitoring of human physiological indicators (such as heart rate, body temperature, etc.), providing strong technical support for medical monitoring and personalized health management.

[0035] (2) Strong infrared emission and modulation performance: By applying voltage, the infrared emission characteristics of the material can be effectively excited, and the emission intensity and wavelength can be adjusted. Combined with electro-excitation technology, this material can be used for real-time infrared heating modulation through wearable textiles, which is suitable for physical therapy and rehabilitation, promotes blood circulation, reduces muscle fatigue, and helps accelerate the rehabilitation process.

[0036] (3) Excellent flexibility and weavability: While maintaining high conductivity and infrared emission performance, this material has excellent flexibility and can be processed into weavable textiles. This characteristic allows it to be seamlessly integrated into smart clothing, medical textiles and everyday wearable devices, providing wearers with a comfortable user experience and broadening the application scenarios of the material in daily life and medical fields.

[0037] (4) Wide range of applicable scenarios: This material can be applied to a variety of scenarios, including intelligent health monitoring devices, rehabilitation and physiotherapy products, military protective equipment, and other wearable smart devices. For example, in daily health monitoring, wearers can obtain health data in real time without external devices; in the field of medical rehabilitation, the infrared heating function can help patients recover and reduce treatment time. In the military field, the stealth function effectively improves survivability on the battlefield.

[0038] In summary, the electro-excitation conductive flexible woven infrared material of this invention provides a novel technological platform for smart textiles, medical monitoring, physical therapy, rehabilitation, and military applications. Through innovative material design and manufacturing processes, this material possesses excellent electro-excitation controllability, flexibility, and wide applicability, providing crucial support for the future technological development of the smart wearable field. Attached Figure Description

[0039] Figure 1 The flowchart shows the preparation of elastic CB / AB2O4 / PVDF (TPU) conductive filaments.

[0040] Figure 2 This is a diagram of the apparatus for preparing conductive fabrics by coaxial wet spinning, as shown in the example.

[0041] Figure 3 A diagram of the apparatus used to prepare the conductive fabric for this example.

[0042] Figure 4The current-voltage characteristic curve of the conductive fabric prepared for the example is shown.

[0043] Figure 5 The power radiation temperature variation graph of the conductive fabric prepared for the example.

[0044] Figure 6 The tensile properties of the conductive fabric prepared for this example are shown in the figure.

[0045] Figure 7 This is an infrared emission intensity diagram under different power levels in Example 2.

[0046] Figure 8 The cross-section and enlarged view of the elastic AB2O4 conductive wire prepared for the example.

[0047] Figure 9 The cross-section and enlarged view of the elastic CB conductive wire prepared for the example.

[0048] Figure 10 The cross-section and enlarged view of the elastic PVDF conductive wire prepared for the example.

[0049] Figure 11 The current-voltage characteristic curves of the conductive wires prepared in the comparative example and Example 2 are shown.

[0050] Figure 12 The power radiation temperature curves of the conductive wires prepared in the comparative example and Example 2 are shown. Detailed Implementation

[0051] The following detailed description provides further details on specific embodiments, but the embodiments of the present invention are not limited thereto. Unless otherwise specified, the technical means used in the following embodiments are conventional means well known to those skilled in the art; the experimental methods used are all conventional methods; and the materials and reagents used are all commercially available.

[0052] Overview of the plan:

[0053] A method for preparing an electrically excited conductive flexible braidable infrared material includes the following steps:

[0054] Step 1: Preparation of infrared material slurry: Infrared material, conductive precursor powder, binder and solvent are mixed in a certain appropriate ratio to obtain a mixed slurry, and then degassing treatment is performed.

[0055] Step 2: Wet spinning (overall process as follows) Figure 1 As shown): This includes sequential processes of spinning, coagulation bath, plasticizing bath, and winding. The mixed slurry and functional core material obtained in step one are injected into the coagulation bath for preliminary shaping using a multi-component injection device, followed by solvent removal, curing or air drying, collection, and storage to form the product. Figure 2In the process, slurry one consists of infrared material (AB2O4), conductive precursor powder (graphene), polyvinylidene fluoride (PVDF), and NN-dimethylformamide, while slurry two consists of polyvinylidene fluoride (PVDF) and NN-dimethylformamide. The main function of slurry two is to form a highly flexible carrier on the core shell so that the required materials can be coated to form highly flexible fibers.

[0056] The infrared-emitting flexible fibers obtained by the above-described preparation process have applications in the fields of infrared emission and biomedical radiation. In this invention, the preferred application is weaving them into clothing with infrared-emitting properties; the apparatus for preparing conductive fabrics includes… Figures 2-3 As shown.

[0057] In step one, the infrared material is a semiconductor quantum dot material, specifically at least one of gallium arsenide (GaAs), gallium aluminum arsenide (GaAlAs), and AB2O4.

[0058] The conductive precursor powder is silver nanowires, conductive carbon black, or graphene. The mass ratio of the infrared material to the conductive precursor powder is 5:(0.05–0.5). AB₂O₄ and graphene are preferred as the infrared material and conductive precursor powder.

[0059] The adhesive is at least one of polyvinylidene fluoride (PVDF), thermoplastic polyurethane elastomer (TPU), epoxy resin (FRP), and polyimide (PI).

[0060] The solvent is N-methylpyrrolidone (NMP) or dimethylformamide (DMF). The mass ratio of binder to solvent is 1:(8-10). Polyvinylidene fluoride (PVDF) and N-methylpyrrolidone (DMF) are preferred binders and solvents.

[0061] In step two, the functional core material is at least one of carbon fiber filaments, metal filaments, and various materials suitable for 3D printing curing. The slurry injection rate is (1-3) mL / h, and the filament injection rate is [missing information].

[0062] The coagulation bath for wet spinning includes anhydrous ethanol and ultrapure water. The purity of the anhydrous ethanol is 90-99.99%, and the resistivity of the ultrapure water is greater than 18 MΩ·cm. The temperature of the coagulation bath is preferably 50-70℃, and more preferably 50-55℃.

[0063] The plasticizing bath used in wet spinning includes sulfuric acid and sodium sulfate, and the temperature of the plasticizing bath is preferably 70-90℃.

[0064] The nozzle orifice of the wet spinning process is 200–2000 μm, more preferably 20–1500 μm, and most preferably 30–1000 μm.

[0065] Example 1

[0066] A method for preparing an electrically induced conductive flexible braidable infrared material includes the following steps: First, the following mass ratios are used: AB₂O₄, conductive carbon black, polyvinylidene fluoride (PVDF), and NN-dimethylformamide are mixed: 5:1:1:8. The weighed NN-dimethylformamide and PVDF raw materials are added to a beaker, sealed, and stirred for 4 hours to dissolve, resulting in a slurry. Then, the weighed infrared material and conductive precursor powder (graphene) are mixed evenly with NN-dimethylformamide and added to the slurry. The mixture is stirred at 300 r / min for 1 hour to ensure complete homogenization, while simultaneously heating at 50°C to obtain a pre-mixed solution. The stirred and heated pre-mixed solution is allowed to stand for 2 hours, and then vacuum degassing is performed at 0.1 MPa to remove suspended air bubbles. The vacuum-degassed pre-mixed solution is then passed through the spinning nozzle of a spinning device to uniformly prepare fibers of uniform size at a constant speed (0.2 ml / h).

[0067] The second step involves placing the fiber filaments produced by the spinning nozzle into a coagulation solution (anhydrous ethanol). Since N,N-dimethylformamide (DMF) solvent is readily soluble in alcohols and water, anhydrous ethanol is used as a coagulant to absorb the DMF solvent from the freshly spun fibers. This is because DMF may undergo hydrolysis in reactions with water and alcohols, especially under acidic or alkaline conditions. In these reactions, the carbonyl carbon of DMF may be subjected to nucleophilic attack, leading to the breakage of the carbon-nitrogen bond and the generation of corresponding alcohol or water derivatives. Under heating conditions, dimethylamine and carbon monoxide are also generated, thus effectively removing the solvent from the fiber. The cured fiber filaments are then rinsed with pure water to remove any remaining solvent, and then air-dried. After stretching and setting, they are wound onto a spool or other collecting device to obtain the desired electrically conductive flexible braided infrared material fiber filaments (conductive infrared emitting fibers).

[0068] Example 2

[0069] The difference between this embodiment and Embodiment 1 is that the mass ratio of AB2O4, conductive carbon black, polyvinylidene fluoride, and NN-dimethylformamide in the flexible infrared fiber material is 5:0.3:1:8.

[0070] Example 3

[0071] The difference between this embodiment and Embodiment 1 is that the mass ratio of AB2O4, conductive carbon black, polyvinylidene fluoride, and NN-dimethylformamide in the flexible infrared fiber material is 5:0.5:1:8.

[0072] Comparative Example 1

[0073] The difference between this embodiment and Embodiment 2 is that polyvinylidene fluoride (PVDF) is replaced with thermoplastic polyurethane elastomer (TPU) to prepare flexible conductive infrared emitting fiber filaments of 0.5mm-1.5mm.

[0074] Comparative Example 2

[0075] The difference between this embodiment and Embodiment 2 is that the mass ratio of infrared material (AB2O4), conductive carbon black, PVDF, and DMF is changed to 5:0.5:0.5:8 to prepare flexible conductive infrared emitting fiber filaments of 0.5mm-1.5mm.

[0076] Comparative Example 3

[0077] The difference between this embodiment and Embodiment 2 is that the mass ratio of infrared material (AB2O4), conductive carbon black, PVDF, and DMF is changed to 5:0.5:1.5:8 to prepare flexible conductive infrared emitting fiber filaments of 0.5mm-1.5mm.

[0078] Comparative Example 4

[0079] The difference between this embodiment and Embodiment 2 is that: conductive carbon black is directly mixed with PVDF and DMF at a mass ratio of 5:1:20 to prepare flexible conductive infrared emitting fiber filaments of 0.5mm-1.5mm.

[0080] Material property characterization in Experimental Examples 1-3

[0081] The morphology, conductivity, and mechanical properties of the electrically excited conductive flexible braidable infrared materials prepared in the above embodiments were characterized.

[0082] like Figure 4 , Figure 5 and Figure 6 These are comparisons of the results obtained in Examples 1-3: the volt-ampere characteristic curves obtained using a DH1766 current source; the power radiation temperature curves obtained by combining a handheld infrared thermal imager with a DH1766 current source; and the tensile stress-strain curves obtained using a tension-compression integrated testing machine. Figure 5 The comparison results show that the increasing trend of infrared radiation temperature with increasing power is almost the same for the three embodiments. Figure 4 and Figure 6The comparative results show that the conductivity gradually increases with the increase of the proportion of conductive medium, but the tensile stress and strain decrease with the increase of the amount of conductive medium injected, and the prepared fiber filaments become increasingly difficult to shape. Considering the linear correlation between conductivity and current-voltage characteristic curves, Example 2 achieves higher electro-excitation efficiency while maintaining linear correlation. Therefore, the proportions of Examples 1-3 can be combined to rationally select the material ratio based on the electro-induced excitation efficiency and the emissivity of the flexible conductive infrared fiber to achieve the best application purpose.

[0083] Infrared images of the conductive high infrared emissivity flexible fiber prepared by the method of this invention in the 5-12 μm band were obtained by testing the infrared emissivity measurement device ARCoptix FTIR Rocket at the Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences. Figure 7 , Figure 7 The flexible high infrared emissivity fiber material prepared in Example 2 is shown. The infrared emission spectra at different powers are electrically excited, demonstrating the electroexcitation characteristics of the flexible fiber material of the present invention. This provides a material basis for electric field-tuned excitation of infrared emission and a corresponding physical basis for infrared biomedicine.

[0084] The morphological characterization results of the fibers prepared in Examples 1-3, measured using a Zeiss Gemini 300 SEM field emission scanning electron microscope, are as follows: Figures 8-10 As shown, the fibers exhibit a porous, rugged surface and relatively loose stacking. In contrast, the fibers in Example 2 demonstrate a unique micropore structure, a compact and dispersed structure, and a well-structured stacking. Optimization by adjusting experimental conditions, including spinning parameters and the content of AB2O4 and PVDF components, affects the toughness and conductivity of the fiber yarns. The results indicate that this method can yield electrically excited conductive flexible braidable infrared-emitting fiber materials. To obtain even better parameters, the following comparative data were varied based on Example 2.

[0085] Experimental Example 2

[0086] The infrared emission effects, electrical properties, and gravitational strain changes of the materials in Examples 2 and Comparative Examples 1-4 were detected using a handheld infrared thermal imager, a DH1766 current source, and a tensile testing machine. The results are as follows: Figures 11-12 As shown in Table 1, for Comparative Example 1, the electrical properties become more linearly correlated after replacing with TPU, making it easier to regulate the electric field. The enhanced conductivity may be due to its promotion of charge transfer; Table 1 also shows that its conductivity is higher than that of Example 2, but from... Figure 12The results showed that the infrared radiation temperature under the same power was lower than that of Example 2. This is likely because the TPU-formed fiber filaments absorb some of the infrared radiation emitted by the infrared material during electrical excitation, resulting in a reduction of approximately 10% in infrared emission capability under these conditions. Its strain was increased by 50% compared to Example 2. For Comparative Example 2, changing the amount of PVDF resulted in an approximately 20% increase in infrared emission capability compared to Example 2, along with a certain degree of improvement in conductivity and infrared radiation temperature. This indicates that the infrared emission, conductivity, and infrared radiation temperature of the infrared material increase as the amount of PVDF decreases. However, considering that without adding binder, the material lacks flexibility and mechanical properties, and that adding binder does not significantly reduce the infrared emission performance of the flexible fiber, an appropriate increase in binder is necessary. Therefore, strict control of the PVDF content is required. For Comparative Examples 2 and 3 compared to Example 2, Figure 11 , 12 As shown in Table 1, different proportions of binder do not significantly affect the infrared emission capability of the coated fiber structure. Figure 11 The current-voltage characteristic curves of Comparative Examples 2 and 3 show that they affect the linear correlation of the current-voltage characteristic curves. Furthermore, while preparing coated fibers with better conductivity, it affects the fiber's flexibility, mechanical properties, and formability. This is because adding more conductive dielectric introduces more carbon-oxygen and carbon-carbon bonds, increasing the brittleness of the infrared fiber and reducing its weavability. Comparative Example 4 demonstrates that the improvement in the infrared emission capability of this material is independent of the addition of conductive carbon black. Figure 11 Table 1 shows that the infrared radiation temperature of conductive carbon black is much lower than that of this material, so conductive carbon black only plays a role in enhancing electrical conductivity. Therefore, in use, the appropriate fiber ratio and internal arrangement can be constructed based on the results of the comparative example and the embodiment.

[0087] In summary, this technical solution aims to provide a method for preparing a braidable conductive infrared emitting material. A certain amount of conductive carbon black and a binder that does not affect infrared emission performance are added to the infrared material AB2O4. Ensuring that the braidable infrared fibers obtained after adding conductive carbon black and the binder have ideal properties is one of the key focuses of this research. The inventors first attempted to mix conductive carbon black, binder, and AB2O4 with the organic solvent DMF and prepare fiber yarns through wet spinning (Example 1). Data from Example 1 and Comparative Example 4 show that the infrared material plays a crucial role in mid-infrared emission, rather than the addition of conductive carbon black. In this invention, the conductive carbon black merely promotes charge transfer. The infrared emission capability of the product obtained in Comparative Example 3 is somewhat reduced. The binder absorbs some of the infrared emission from the material. Therefore, to obtain a conductive braided material with better performance, it is necessary to simultaneously ensure electrical properties, tensile properties, and infrared radiation properties. This requires subjecting the mixture of conductive carbon black, binder, and AB2O4 infrared material to a rotational tensile stress and a specific temperature during extrusion into the coagulation liquid using an injection molding machine. This ensures that the resulting infrared fiber material possesses good tensile properties while also exhibiting flexibility, conductivity, and infrared emission capabilities. Comparative Example 2 shows the results of this treatment; experimental results indicate that this method significantly enhances the fiber's toughness.

[0088] Table 1. Summary of the conductivity of the resistance meters in the comparative examples and embodiments.

[0089] Group Material composition Length (mm) Diameter (mm) Resistance (Ω) Electrical conductivity (S / m) Example 1 <![CDATA[AB2O4 / CB / PVDF / DM=5:1:1:1:8]]> 35 1 1600 27.85 Example 2 <![CDATA[AB2O4 / CB / PVDF / DM=5:0.5:1:8]]> 30 1 1100 34.72 Example 3 <![CDATA[AB2O4 / CB / PVDF / DM=5:0.3:1:8]]> 30 1 1500 25.46 Comparative Example 1 <![CDATA[AB2O4 / CB / TPU / DM=5:0.5:1:8]]> 20 1 561 45.39 Comparative Example 2 <![CDATA[AB2O4 / CB / PVDF / DM=5:0.5:0.5:8]]> 50 1 870 73.17 Comparative Example 3 <![CDATA[AB2O4 / CB / PVDF / DM=5:0.4:1.5:8]]> 20 1 793 32.11 Comparative Example 4 CB / PVDF / DM = 5:1:20 45 1 492 1116.5

[0090] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A method for preparing an electrically excited conductive flexible weaveable infrared material, characterized in that, Includes the following steps: Step 1: Preparation of infrared material slurry: Mix infrared material, conductive precursor powder, binder and solvent and degas to obtain mixed slurry; Step 2: Wet spinning.

2. The method for preparing an electrically excited conductive flexible braidable infrared material according to claim 1, characterized in that: In step one, the mass ratio of infrared material, conductive precursor powder, binder and solvent is (5-10):(0.05-1):(0.5-1.5):(6-20).

3. The method for preparing an electrically excited conductive flexible braidable infrared material according to claim 2, characterized in that: In step one, the infrared material is at least one of gallium arsenide, gallium aluminum arsenide, and AB2O4.

4. The method for preparing an electrically excited conductive flexible braidable infrared material according to claim 3, characterized in that: In step one, the conductive precursor powder is silver nanowires, conductive carbon black, or graphene.

5. The method for preparing an electrically excited conductive flexible braidable infrared material according to claim 4, characterized in that: In step one, the adhesive is at least one of polyvinylidene fluoride, thermoplastic polyurethane elastomer, epoxy resin, and polyimide.

6. The method for preparing an electrically excited conductive flexible braidable infrared material according to claim 5, characterized in that: In step one, the solvent is N-methylpyrrolidone or dimethylformamide.

7. The method for preparing an electrically excited conductive flexible braidable infrared material according to claim 6, characterized in that: In step two, during wet spinning, the mixed slurry and functional core material are mixed, spun, coagulated, plasticized, and packaged.

8. The method for preparing an electrically excited conductive flexible braidable infrared material according to claim 7, characterized in that: The functional core material is at least one of carbon fiber filaments, metal filaments, and 3D printing materials.

9. The method for preparing an electrically excited conductive flexible braidable infrared material according to claim 8, characterized in that: In step two, the coagulation bath includes anhydrous ethanol and ultrapure water. The purity of the anhydrous ethanol is 90-99.99%, and the resistivity of the ultrapure water is greater than 18 MΩ·cm. The temperature of the coagulation bath is 50-70℃. The plasticizing bath includes sulfuric acid and sodium sulfate. The temperature of the plasticizing bath is 70-90℃. The nozzle orifice of the wet spinning process is 200-2000 μm, and the slurry injection speed is (1-3) mL / h.

10. The application of the flexible braidable infrared material prepared by the method for preparing an electrically excited conductive flexible braidable infrared material according to any one of claims 1 to 9 in the fields of infrared emission and biomedical science.

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