Bio-based material conductive fiber, fabric and production process

Abstract

The invention relates to the technical field of textiles, and particularly discloses a bio-based material conductive fiber, a fabric and a production process. The bio-based nylon fiber is used as a base material, polyaniline is loaded on the surface of the bio-based nylon fiber in an in-situ polymerization mode, the body conductive fiber is obtained, the surface of the body conductive fiber is further coated with the conductive coating, and the bio-based material conductive fiber is obtained. The bio-based material conductive fiber disclosed by the invention not only has good conductivity, but also has less loss of conductivity after being washed, so that the defects in the related technology are overcome, and the requirements of clothes and wearable equipment can be better met.

Description

Technical Field

[0001] The present application relates to the field of textile technology, and more specifically, to a bio-based conductive fiber, fabric and production process. Background Art

[0002] Conductive fibers usually refer to fibers with a conductivity greater than 10 at standard atmospheric pressure. -7 Fibers with a surface area of ​​100 S / cm are widely used in daily life, industrial production, national defense and military industries. Traditional conductive fibers are mostly developed for the purpose of anti-static, and their predecessors are various common chemical fibers. In the past, researchers generally used strategies such as blending, grafting and adding surfactants to improve the hygroscopicity of fibers to promote the dissipation of surface charges. However, the conductive fibers prepared by these methods have high requirements for environmental humidity.

[0003] With the introduction of new concepts such as wearable devices and smart textiles, the research and development of conductive fibers has once again risen. At present, the preparation methods of conductive fibers mainly include post-treatment, conductive particle filling, and direct spinning of intrinsic conductive polymers. Among them, the post-treatment method has the characteristics of simple process, low cost, and low volume resistivity of the obtained fiber, so it has attracted much attention. The coating method is a commonly used post-treatment process, the principle of which is to load the conductive material (such as carbon black) on the surface of the base fiber.

[0004] Regarding the above-mentioned related technologies, the inventors believe that although the coating method can obtain conductive fibers, it also has the disadvantage that the conductive material is easy to fall off, especially after washing, the conductive effect will be significantly reduced, so it is difficult to meet the needs of producing clothing and wearable devices. Summary of the invention

[0005] In the related art, the conductive fiber prepared by the coating method has the disadvantage that the conductive material is easy to fall off, especially after washing, the conductive effect will be significantly reduced, so it is difficult to meet the needs of producing clothing and wearable devices. In order to improve this defect, the present application provides a bio-based conductive fiber, fabric and production process.

[0006] In a first aspect, the present application provides a bio-based conductive fiber, which adopts the following technical solution: A bio-based conductive fiber, comprising a bulk conductive fiber and a conductive coating, wherein the bulk conductive fiber is a bio-based nylon fiber with a polyaniline coating layer in-situ grown on the surface, and the conductive coating is coated on the surface of the bulk conductive fiber; the conductive coating is formed by curing a conductive slurry, and the conductive slurry comprises the following components by weight percentage: 8-12% polyaniline particles, 2.4-2.8% polyaniline nanotubes, 4.6-5.2% conductive additive, 6.5-8.5% polyurethane binder, and the balance is supplemented to 100% by DMAC; camphorsulfonic acid is doped in the polyaniline particles, the polyaniline nanotubes and the polyaniline coating, and the conductive additive comprises a carbonaceous conductive material and nano antimony tin oxide.

[0007] By adopting the above technical scheme, the present application uses bio-based nylon fiber as a substrate, loads polyaniline on the surface of the bio-based nylon fiber by in-situ polymerization, obtains a bulk conductive fiber, and further coats the surface of the bulk conductive fiber with a conductive coating to obtain a bio-based material conductive fiber. In the raw materials selected in the present application, the doping of camphorsulfonic acid can optimize the structure of polyaniline, thereby improving the conductive properties of polyaniline particles, polyaniline nanotubes, and polyaniline coatings; and the combination of carbonaceous conductive materials and nano-tin antimony oxide is also conducive to the efficient conduction of current, thereby creating favorable conditions for the improvement of conductive properties. Through the coordinated cooperation of polyaniline particles, polyaniline nanotubes, conductive additives, and polyaniline coatings, a complex conductive network can be formed inside the bio-based material conductive fiber, and various components achieve a synergistic conductive effect, so that the bio-based material conductive fiber has good conductive properties. Moreover, since the polyaniline coating is continuously distributed on the surface of the bulk conductive fiber, even if the components such as polyaniline particles, polyaniline nanotubes, and conductive additives in the conductive coating are lost during the washing process, it is not easy to have a significant impact on the conductive network. It can be seen that the bio-based conductive fiber of the present application not only has good conductive properties, but also has less loss of conductive properties after washing, thereby overcoming the defects in the relevant technology and being able to better meet the needs of clothing and wearable devices.

[0008] Preferably, the carbonaceous conductive material includes at least one of nano carbon black, carbon nanotubes and graphite.

[0009] By adopting the above technical solution, using the above several carbonaceous conductive materials helps to improve the conductive properties of bio-based conductive fibers.

[0010] Preferably, the conductive additive further comprises silver nanowires.

[0011] By adopting the above technical solution, silver nanowires have a very low resistance, and can enhance the conduction effect of current in the conductive coating through a one-dimensional structure, which can effectively improve the conductive properties of conductive fibers made of bio-based materials.

[0012] Preferably, the amount of the silver nanowires is 15-25% of the total weight of the carbonaceous conductive material.

[0013] By adopting the above technical solution, the present application optimizes the dosage range of silver nanowires, which helps to improve the conductive properties of bio-based conductive fibers.

[0014] Preferably, the silver nanowires are prepared according to the following method: (1) Add polyvinyl pyrrolidone to ethylene glycol and mix to obtain a PVP solution, which is set aside; add silver nitrate to ethylene glycol to obtain a silver salt solution, which is set aside; add ferric chloride and cupric chloride to ethylene glycol to obtain a chloride salt solution, which is set aside; (2) Adding the silver salt solution and the chloride salt solution to the PVP solution, stirring them to carry out a hydrothermal reaction, and then centrifuging them. The obtained solid product is washed and dried to obtain silver nanowires.

[0015] By adopting the above technical solution, the present application uses ferric chloride and cupric chloride as control agents and adopts the polyol method to achieve the preparation of silver nanowires. Ferric chloride can reduce the etching of silver twins by oxygen / chloride ions, while cupric chloride can make the silver nanowires have a larger aspect ratio, which helps to improve the conductive properties of bio-based conductive fibers.

[0016] Preferably, the bulk conductive fiber is prepared according to the following method: (1) adding aniline and an organic acid into a hydrochloric acid solution to dissolve them to obtain a raw material solution for later use; adding ammonium persulfate into water to obtain an initiator solution for later use; the organic acid used in this step includes camphorsulfonic acid; (2) Bio-based nylon fiber and surfactant are added to the raw material solution, and then the initiator solution is added, and the reaction is carried out at room temperature and then in an ice water bath. The fiber is then taken out and washed with water, and then dried to obtain the bulk conductive fiber.

[0017] By adopting the above technical scheme, the present application first prepares a raw material solution containing aniline, then uses ammonium persulfate in the raw material solution to initiate the polymerization of aniline, forms a polyaniline coating layer on the surface of the bio-based nylon fiber, and achieves doping through hydrochloric acid and camphorsulfonic acid to obtain a bulk conductive fiber.

[0018] Preferably, in the step (2) of preparing the bulk conductive fiber, nanocrystalline cellulose is also added to the raw material solution.

[0019] By adopting the above technical scheme, during the in-situ polymerization of polyaniline, nano-microcrystalline cellulose can adsorb aniline cations and serve as a deposition carrier for polyaniline, thereby promoting the dispersion of polyaniline and reducing the large-scale aggregation of polyaniline, which helps to fully realize the doping of hydrochloric acid and organic acid and helps to improve the conductive properties of conductive fibers made of bio-based materials.

[0020] Preferably, in the step (1) of preparing the bulk conductive fiber, the organic acid used further includes sulfosalicylic acid.

[0021] By adopting the above technical solution, the doping of sulfosalicylic acid can delocalize more positive charges to the aromatic ring, which is beneficial to the charge transition, thereby improving the conductive properties of the bio-based conductive fiber.

[0022] In a second aspect, the present application provides a fabric that adopts the following technical solution.

[0023] A fabric is woven from any of the above-mentioned bio-based conductive fibers.

[0024] By adopting the above technical solution, the fabric made of the above bio-based conductive fiber has good conductive properties, and the conductive properties have high water washing stability, which can better meet the needs of producing clothing and wearable devices.

[0025] In a third aspect, the present application provides a method for preparing conductive fibers of bio-based materials, using the following technical solution.

[0026] A method for preparing a bio-based conductive fiber comprises the following steps: (1) mixing fiber-grade polyurethane and DMAC to obtain a binder solution, grinding and sieving polyaniline to obtain polyaniline particles, and mixing the polyaniline particles, a conductive additive and the binder solution to obtain a conductive slurry for later use; (2) Immersing the conductive fiber into the conductive slurry, taking it out after immersion, and drying and curing it; (3) Repeat step (2) 7-10 times to obtain bio-based conductive fibers.

[0027] By adopting the above technical solution, the present application first prepares the conductive slurry, and then repeatedly loads the conductive slurry, which can fully realize the coating of the conductive coating on the main conductive fiber, and help improve the conductive properties of the conductive fiber of the bio-based material.

[0028] In summary, this application has the following beneficial effects: 1. The bio-based conductive fiber of the present application not only has good conductive properties, but also has less conductive property loss after washing, thereby overcoming the defects in the relevant technology and being able to better meet the needs of producing clothing and wearable devices.

[0029] 2. In the present application, silver nanowires are preferably used as conductive additives. Silver nanowires have a relatively low resistance and can enhance the conduction effect of current in the conductive coating through a one-dimensional structure, and can effectively improve the conductive properties of conductive fibers made of bio-based materials.

[0030] 3. The present application adds nano-microcrystalline cellulose to the method for preparing bulk conductive fibers. The nano-microcrystalline cellulose can adsorb aniline cations and act as a deposition carrier for polyaniline, thereby promoting the dispersion of polyaniline and reducing the large-scale aggregation of polyaniline, which helps to fully realize the doping of hydrochloric acid and organic acid, and improves the conductive properties of the conductive fibers of bio-based materials. DETAILED DESCRIPTION

[0031] The present application is further described in detail below in conjunction with embodiments, preparation examples and comparative examples. The raw materials involved in the present application can all be obtained commercially. Preparation example of silver nanowires

[0032] The following is an explanation using Preparation Example 1.

[0033] Preparation Example 1 In this preparation example, silver nanowires were prepared according to the following method: (1) Add 0.8 g of polyvinyl pyrrolidone to 110 mL of ethylene glycol, mix, and stir to dissolve to obtain a PVP solution for later use; add silver nitrate to ethylene glycol to obtain 10 mL of a silver salt solution with a concentration of 0.05 mol / L, for later use; add ferric chloride and cupric chloride to ethylene glycol to obtain 15 mL of a chloride solution with an iron ion and a copper ion concentration of 0.05 mmol / L each, for later use; (2) Add the silver salt solution and the chloride salt solution to the PVP solution, stir for 15 minutes, perform a hydrothermal reaction at 140°C for 12 hours, and then centrifuge to separate the solid product, wash and dry to obtain silver nanowires. Preparation example of bulk conductive fiber

[0034] The following is an explanation using Preparation Example 2.

[0035] Preparation Example 2 In this preparation example, the bio-based nylon fiber is made of PA510, and the drafting multiple of the bio-based nylon fiber is 3.5 times, the linear density is 97 dtex, and the breaking strength is 5.3 cN / dtex.

[0036] In this preparation example, the bulk conductive fiber is prepared according to the following method: (1) Add 0.04 mol aniline and 0.02 mol camphorsulfonic acid into 40 mL of 2 nol / L hydrochloric acid solution to dissolve them to obtain a raw material solution for later use; add 0.05 mol ammonium persulfate into 40 mL of water to obtain an initiator solution for later use; (2) 0.025 g of bio-based nylon fiber and 0.01 mol of surfactant (sodium dodecylbenzene sulfonate) were added to the raw material solution, and then the initiator solution was added. The reaction was carried out at room temperature of 25 °C and then at an ice water bath of 0 °C for 24 h. The fiber was then taken out and washed with water. After drying, the bulk conductive fiber was obtained.

[0037] Preparation Example 3 The difference between this preparation example and preparation example 2 is that in step (2) of preparing the bulk conductive fiber, nano-microcrystalline cellulose is further added to the raw material solution, and the amount of nano-microcrystalline cellulose used is 5% of the weight of aniline in step (1).

[0038] Preparation Example 4 The difference between this preparation example and preparation example 1 is that in step (1) of preparing the bulk conductive fiber, the organic acid added to the hydrochloric acid solution also includes sulfosalicylic acid, and the molar ratio of sulfosalicylic acid to camphorsulfonic acid is 1:1.

[0039] Examples 1-5 The following description is given by taking Example 1 as an example.

[0040] Example 1 In this embodiment, the bulk conductive fiber is prepared according to the method of Preparation Example 2, and the polyaniline particles, polyaniline nanotubes, and polyaniline coating are all doped with camphorsulfonic acid; the average particle size of the polyaniline particles is 10 μm, and the camphorsulfonic acid doping rate is 13%; the average inner diameter of the polyaniline nanotubes is 150 nm, the average outer diameter is 280 nm, the average length is 2 μm, and the camphorsulfonic acid doping rate is 20%. The conductive additive is composed of a carbonaceous conductive material and nano-antimony tin oxide, the carbonaceous conductive material is nano-carbon black, and the weight ratio of the carbonaceous conductive material to the nano-antimony tin oxide is 1:1.

[0041] The present embodiment provides a bio-based conductive fiber, comprising a main conductive fiber and a conductive coating, wherein the conductive coating is coated on the surface of the main conductive fiber; the conductive coating is formed by curing a conductive slurry, and the conductive slurry comprises the following components by weight percentage: 8% polyaniline particles, 2.4% polyaniline nanotubes, 4.6% conductive additive, 6.5% polyurethane binder, and the balance is supplemented by DMAC to 100%.

[0042] This embodiment also provides a fabric made of bio-based conductive fibers, with a surface density of 200g / m2 .

[0043] This embodiment also provides a method for preparing a bio-based conductive fiber, comprising the following steps: (1) mixing fiber-grade polyurethane and DMAC to obtain a binder solution, grinding and sieving polyaniline to obtain polyaniline particles, and mixing the polyaniline particles, a conductive additive and the binder solution to obtain a conductive slurry for later use; (2) Immerse the conductive fiber in the conductive slurry, take it out after soaking for 10 minutes, and use hot air to dry and solidify it; (3) Repeat step (2) 7 times to obtain bio-based conductive fibers.

[0044] As shown in Table 1, the main differences between Examples 1-5 are the raw material ratios of the conductive paste and the number of repetitions of step (2) (referred to as the number of dipping times in Table 1).

[0045] Table 1 Raw material ratio of conductive paste and dipping times

[0046] Example 6 The difference between this embodiment and embodiment 5 is that the carbonaceous conductive material is formed by mixing nano carbon black and graphite (powder, average particle size 35 μm) in a weight ratio of 4:1.

[0047] Example 7 The difference between this embodiment and embodiment 6 is that the carbonaceous conductive material is formed by mixing nano carbon black and carbon nanotubes in a weight ratio of 4:1.

[0048] Example 8 The difference between this embodiment and embodiment 7 is that the conductive additive further includes silver nanowires, and the amount of the silver nanowires used is 10% of the total weight of the carbonaceous conductive material.

[0049] Example 9 The difference between this embodiment and embodiment 8 is that the amount of silver nanowires used is 15% of the total weight of the carbonaceous conductive material.

[0050] Example 10 The difference between this embodiment and embodiment 8 is that the amount of silver nanowires used is 20% of the total weight of the carbonaceous conductive material.

[0051] Embodiment 11 The difference between this embodiment and embodiment 8 is that the amount of silver nanowires used is 25% of the total weight of the carbonaceous conductive material.

[0052] Example 12 The difference between this embodiment and embodiment 11 is that ferric chloride is not added when preparing the silver nanowires.

[0053] Embodiment 13 The difference between this embodiment and embodiment 11 is that copper chloride is not added when preparing the silver nanowires.

[0054] Embodiment 14 The difference between this embodiment and embodiment 11 is that the bulk conductive fiber is prepared according to the method of preparation example 3.

[0055] Embodiment 15 The difference between this embodiment and embodiment 14 is that the bulk conductive fiber is prepared according to the method of preparation example 4. Comparative Example

[0056] Comparative Example 1 The difference between this comparative example and Example 1 is that the bulk conductive fiber is replaced with bio-based nylon fiber made of PA510.

[0057] Comparative Example 2 The difference between this comparative example and Example 1 is that there is no conductive coating on the surface of the bulk conductive fiber.

[0058] Comparative Example 3 The difference between this comparative example and Example 1 is that the components of the conductive paste do not include polyaniline particles.

[0059] Comparative Example 4 The difference between this comparative example and Example 1 is that the components of the conductive paste do not include polyaniline nanotubes.

[0060] Comparative Example 5 The difference between this comparative example and Example 1 is that the components of the conductive paste do not include a conductive auxiliary agent.

[0061] Comparative Example 6 The difference between this comparative example and Example 1 is that the conductive auxiliary agent does not include a carbonaceous conductive material.

[0062] Comparative Example 7 The difference between this comparative example and Example 1 is that the conductive auxiliary agent does not include nano antimony tin oxide.

[0063] Comparative Example 8 The difference between this embodiment and embodiment 1 is that in the method for preparing the bulk conductive fiber, camphorsulfonic acid is replaced by hydrochloric acid in equal moles. Performance testing methods

[0064] 1. Conductive performance test The conductive fibers of the bio-based materials of each embodiment and comparative example were clamped with an insulation resistance meter, and the resistance of the conductive fibers was measured under the conditions of 25° C. and 35% air humidity. The resistivity ρ was then calculated according to ρ=RS / L. The resistivity of comparative example 1 was used as a reference, and the ratio between the resistivity of each embodiment and comparative example and the resistivity of embodiment 1 was calculated. The results were recorded as relative resistivity. The results are shown in Table 2.

[0065] 2. Washability test The fiber was washed with water according to the method described in GB / T 12014-1989, each washing lasted for 5 minutes. After 200 washings, the fiber was placed under the conditions of 25°C and 35% air humidity to dry. The fiber after washing was tested with an insulation resistance meter to obtain the resistivity of the fiber, which was recorded as the resistivity after washing. The ratio between the resistivity after washing of each embodiment and the comparative example and the resistivity after washing of the embodiment 1 was calculated based on the resistivity after washing of the comparative example 1, and the result was recorded as the relative resistivity after washing. The results are shown in Table 2.

[0066] Table 2 Relative resistivity

[0067] Combining Examples 1-5 and Comparative Example 1 and Table 2, it can be seen that the relative resistivity and relative resistivity after washing measured in Examples 1-5 are both low, indicating that under the synergistic effect of each component, the bio-based conductive fiber of the present application has good conductive properties, and the conductive properties lost after high-intensity washing are less, so it can better meet the needs of clothing and wearable devices. However, the surface of the bio-based nylon fiber of Comparative Example 1 lacks the polyaniline coating layer polymerized in situ, and the conductive network formed by the components such as polyaniline particles, polyaniline nanotubes, and conductive additives is relatively weak. The washing process causes greater damage to the conductive network. Therefore, the conductive fiber of Comparative Example 1 is poor in both conductive properties and water washing stability.

[0068] Combining Comparative Example 1 and Comparative Example 2 and Table 2, it can be seen that the relative resistivity measured in Comparative Example 2 is higher, while the relative resistivity after washing is lower, indicating that although the polyaniline coating is resistant to water washing, the conductive performance achieved when it is not combined with a conductive coating is relatively limited.

[0069] It can be seen from Example 1, Comparative Example 1 and Comparative Examples 3-7 and Table 2 that when the conductive slurry lacks at least one of polyaniline particles, polyaniline nanotubes, carbonaceous conductive materials and nano-antimony tin oxide, the measured relative resistivity and relative resistivity after washing are between Example 1 and Comparative Example 1, indicating that although the conductive fiber of the bio-based material has a certain water washing stability, the conductive effect is still not good.

[0070] Combining Comparative Example 1 and Comparative Example 8 with Table 2, it can be seen that when camphorsulfonic acid is not doped in the polyaniline coating layer, the conductive property of the bio-based conductive fiber is poor because the structure of the polyaniline coating layer is not further optimized.

[0071] It can be seen from Example 5 and Examples 6-7 and Table 2 that when nano carbon black is compounded with carbon nanotubes and graphite respectively, the bio-based conductive fiber has good conductive properties.

[0072] It can be seen from Example 7, Examples 8-11 and Table 2 that the addition of silver nanowires helps to improve the conductive properties of the bio-based conductive fiber, and when the amount of silver nanowires used is 15-25% of the total weight of the carbonaceous conductive material, the conductive properties of the bio-based conductive fiber are relatively better.

[0073] It can be seen from Example 11, Examples 12-13 and Table 2 that when neither ferric chloride nor cupric chloride is added in the method for preparing silver nanowires, the conductive properties of the bio-based conductive fibers are poor, indicating that the morphology of the silver nanowires is not ideal and their contribution to the conductive properties is relatively limited.

[0074] It can be seen from Example 11 and Example 14 and Table 2 that the relative resistivity measured in Example 14 is relatively low. This is because the nano-microcrystalline cellulose can adsorb aniline cations and act as a deposition carrier for polyaniline, which promotes the dispersion of polyaniline and reduces the large-scale aggregation of polyaniline, which helps to fully realize the doping of hydrochloric acid and organic acid, thereby improving the conductive properties of the conductive fiber of the bio-based material.

[0075] It can be seen from Example 14 and Example 15 and Table 2 that the relative resistivity measured in Example 15 is lower. This is because the doping of sulfosalicylic acid can delocalize more positive charges to the aromatic ring, which is beneficial to the charge transition, thereby improving the conductive properties of the conductive fiber of the bio-based material.

[0076] The above embodiments are merely explanations of the present application and are not limitations of the present application. After reading this specification, those skilled in the art may make modifications to the embodiments of the present application without any creative contribution as needed. However, as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A bio-based conductive fiber, characterized in that: The conductive fiber comprises a bulk conductive fiber and a conductive coating, wherein the bulk conductive fiber is a bio-based nylon fiber with a polyaniline coating layer in-situ grown on the surface, and the conductive coating is coated on the surface of the bulk conductive fiber; the conductive coating is solidified by a conductive slurry, and the conductive slurry comprises the following components by weight percentage: 8-12% polyaniline particles, 2.4-2.8% polyaniline nanotubes, 4.6-5.2% conductive additive, 6.5-8.5% polyurethane binder, and the balance is supplemented by DMAC to 100%; camphorsulfonic acid is doped in the polyaniline particles, the polyaniline nanotubes, and the polyaniline coating, and the conductive additive comprises a carbonaceous conductive material and nano-antimony tin oxide.

2. The bio-based conductive fiber according to claim 1, characterized in that: The carbonaceous conductive material includes at least one of nano carbon black, carbon nanotubes and graphite.

3. The bio-based conductive fiber according to claim 2, characterized in that: The conductive additive also includes silver nanowires.

4. The bio-based conductive fiber according to claim 3, characterized in that: The amount of the silver nanowires used is 15-25% of the total weight of the carbonaceous conductive material.

5. The bio-based conductive fiber according to claim 3, characterized in that: The silver nanowires are prepared according to the following method: (1) Add polyvinyl pyrrolidone to ethylene glycol and mix to obtain a PVP solution, which is set aside; add silver nitrate to ethylene glycol to obtain a silver salt solution, which is set aside; add ferric chloride and cupric chloride to ethylene glycol to obtain a chloride salt solution, which is set aside; (2) Adding the silver salt solution and the chloride salt solution to the PVP solution, stirring them to carry out a hydrothermal reaction, and then centrifuging them. The obtained solid product is washed and dried to obtain silver nanowires.

6. The bio-based conductive fiber according to claim 1, characterized in that: The bulk conductive fiber is prepared according to the following method: (1) adding aniline and an organic acid into a hydrochloric acid solution to dissolve them to obtain a raw material solution for later use; adding ammonium persulfate into water to obtain an initiator solution for later use; the organic acid used in this step includes camphorsulfonic acid; (2) Bio-based nylon fiber and surfactant are added to the raw material solution, and then the initiator solution is added, and the reaction is carried out at room temperature and then in an ice water bath. The fiber is then taken out and washed with water, and then dried to obtain the bulk conductive fiber.

7. The bio-based conductive fiber according to claim 6, characterized in that: In the step (2) of preparing the bulk conductive fiber, nanocrystalline cellulose is also added to the raw material solution.

8. The bio-based conductive fiber according to claim 7, characterized in that: In the step (1) of preparing the bulk conductive fiber, the organic acid used also includes sulfosalicylic acid.

9. A fabric, characterized in that: It is woven from the conductive fibers of the bio-based materials described in any one of claims 1-8.

10. The method for preparing the bio-based conductive fiber according to any one of claims 1 to 8, characterized in that: The following steps are involved: (1) mixing fiber-grade polyurethane and DMAC to obtain a binder solution, grinding and sieving polyaniline to obtain polyaniline particles, and mixing the polyaniline particles, a conductive additive and the binder solution to obtain a conductive slurry for later use; (2) Immersing the conductive fiber into the conductive slurry, taking it out after immersion, and drying and curing it; (3) Repeat step (2) 7-10 times to obtain bio-based conductive fibers.

Images