A carbon fiber-based conductive MPPO material and its preparation method

Abstract

The present invention relates to a carbon fiber-based conductive MPPO material and a preparation method thereof, belonging to the technical field of polymer materials. The carbon fiber-based conductive MPPO material comprises, by weight: 40-70 parts of PPO resin, 10-30 parts of polystyrene, 5-20 parts of a modified flame retardant, 2-10 parts of a modified toughening agent, 0.1-5 parts of an antioxidant, 0.5-2 parts of a lubricant, and 5-15 parts of carbon fiber; in the modified flame retardant, benzoxazine forms a carbon layer to isolate oxygen and heat, releases non-combustible gases, slows down combustion, and its high glass transition temperature endows heat resistance, and polydopamine synergizes with phosphorus and nitrogen to interrupt the combustion chain; in the modified toughening agent, flexible phenoxy enhances toughness, maleimide and silicon oxygen improve the impact resistance, and flexible silicon oxygen chain segments increase the tensile strength; the carbon fiber-based conductive MPPO material prepared by the present invention not only has good conductive and impact resistance effects, but also has excellent heat resistance and flame retardant properties.

Description

Technical Field

[0001] The invention belongs to the technical field of polymer materials, and in particular relates to a conductive MPPO material based on carbon fiber and a preparation method thereof. Background Art

[0002] Polyphenylene ether (PPO) is one of the world's five major general-purpose engineering plastics, with good mechanical properties, heat resistance and non-toxic properties. However, pure PPO resin has low electrical conductivity, and the products are prone to stress cracking and low notch impact strength.

[0003] With the progress of science and technology and the development of industry, the blending application of PPO and polystyrene (PS) has been promoted to prepare PPO / PS alloy, namely MPPO. MPPO has low density, convenient processing, water resistance, temperature resistance, good dimensional stability, and is widely used in office equipment, household appliances, electronic products and the automotive industry. With the increasing awareness of environmental protection and the trend of high-performance miniaturization of electronic products, MPPO materials need to meet higher requirements, not only requiring high impact strength, but also improving heat resistance. In addition, although the conductive MPPO material based on carbon fiber has certain flame retardancy, with the increase in actual application requirements, its own flame retardancy no longer meets the requirements. Therefore, the research and development of excellent conductive MPPO materials based on carbon fiber has important practical significance and application value. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a carbon fiber-based conductive MPPO material and a preparation method thereof.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A conductive MPPO material based on carbon fiber and a preparation method thereof, comprising the following raw materials in parts by weight: 40-70 parts of PPO resin, 10-30 parts of polystyrene, 5-20 parts of modified flame retardant, 2-10 parts of modified toughening agent, 0.1-5 parts of antioxidant, 0.5-2 parts of lubricant, and 5-15 parts of carbon fiber;

[0007] The antioxidant is antioxidant 1010;

[0008] The lubricant is N,N-ethylene bisstearamide.

[0009] The modified flame retardant is prepared by the following method:

[0010] Step A1: Mix toluene, aniline, 2-allyl-4-methylphenol and paraformaldehyde evenly, stir thoroughly, heat to 90° C., and react for 5 hours to obtain an intermediate product;

[0011] Furthermore, the dosage ratio of toluene, aniline, 2-allyl-4-methylphenol, and paraformaldehyde is 75-150 mL: 0.1-0.2 mol: 0.1-0.2 mol: 0.2-0.4 mol;

[0012] Under the action of paraformaldehyde, first, the hydroxyl group of 2-allyl-4-methylphenol reacts with the amino group of aniline to synthesize an intermediate product containing a benzoxazine structure;

[0013] Step A2: Mix 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, N,N-dimethylformamide, and the intermediate product, stir at 150 °C for 9 h, filter, wash, and vacuum dry at 60 °C for 24 h to obtain a pre-product;

[0014] Furthermore, the dosage ratio of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, N,N-dimethylformamide, and the intermediate product is 6.48-10.8 g: 40-60 mL: 0.03-0.05 mol;

[0015] Secondly, the carbon-carbon double bond of the intermediate product is combined with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide to generate a pre-product;

[0016] Step A3: Mix the pre-product, tris(hydroxymethyl)aminomethane, and deionized water, adjust the pH to 8.5, add dopamine hydrochloride, ultrasonically treat for 30 min, stir at room temperature for 24 h, vacuum filter, wash, and vacuum dry at 60 °C for 24 h to obtain a modified flame retardant;

[0017] Furthermore, the dosage ratio of the pre-product, tris(hydroxymethyl)aminomethane, deionized water, and dopamine hydrochloride is 6-8 g: 5-10 g: 500-900 mL: 2.4 g;

[0018] Finally, dopamine hydrochloride self-polymerizes on the surface of the pre-product to form polydopamine, and a modified flame retardant is obtained.

[0019] The modified toughening agent is prepared by the following method:

[0020] Step B1: Mix tetra-(4-aminophenoxy)methylmethane and N-methylpyrrolidone under 0 °C and nitrogen protection, stir evenly, then add maleic anhydride, and stir at 0-15 °C for 1 h to obtain product a;

[0021] Furthermore, the dosage ratio of tetra-(4-aminophenoxy)methylmethane, N-methylpyrrolidone, and maleic anhydride is 0.625-1.25 g: 5 mL: 0.49-0.98 g;

[0022] Under the catalysis of N-methylpyrrolidone, the amino group of maleic anhydride reacts with tetra-(4-aminophenoxy)methylmethane to obtain product a;

[0023] Step B2: Mix dodecylbenzenesulfonic acid and deionized water, raise the temperature to 45 °C, stir evenly, then slowly dropwise add decamethylcyclopentasiloxane and 3-allyloxypropyltrimethoxysilane, mix evenly, react for 3 h, and cool to room temperature to obtain product b;

[0024] Furthermore, the dosage ratio of deionized water, decamethylcyclopentasiloxane, and 3-allyloxypropyltrimethoxysilane is 45 mL: 3-5 mol: 5-7 mol, and the dosage of dodecylbenzenesulfonic acid accounts for 1.4% of the total amount of deionized water in the system;

[0025] Then, use the H + ionized by dodecylbenzenesulfonic acid in deionized water to open the ring of decamethylcyclopentasiloxane, form a growing chain, and condense with 3-allyloxypropyltrimethoxysilane to obtain product b;

[0026] Step B3: Mix product a and product b, stir for 10 min, then add azobisisobutyronitrile and ethanol and mix evenly, raise the temperature to 70-80 °C, react for 3 h, and cool to room temperature to obtain a modified toughening agent;

[0027] Furthermore, the dosage ratio of product a, product b, azobisisobutyronitrile, and ethanol is 5-7 g: 2-4 g: 0.34-0.52 g: 20 mL;

[0028] Finally, copolymerize the carbon-carbon double bonds of product a and product b to obtain a modified toughening agent.

[0029] A preparation method of a conductive MPPO material based on carbon fiber specifically includes the following steps:

[0030] S1. Mix PPO resin, polystyrene, modified flame retardant, modified toughening agent, antioxidant, and lubricant to obtain a mixed material;

[0031] S2. Add the mixed material and carbon fiber into a twin-screw extruder to extrude and pelletize to obtain a conductive MPPO material based on carbon fiber. Among them, the temperature of the twin-screw extruder is set as follows: Zone 1: 180-200 °C, Zone 2: 280-320 °C, Zone 3: 280-320 °C, Zone 4: 280-320 °C, Zone 5: 280-320 °C, Zone 6: 240-260 °C, Zone 7: 240-260 °C, Zone 8: 240-260 °C, head temperature: 260-280 °C, and the screw speed is 400-600 r / min.

[0032] The beneficial effects of the present invention:

[0033] The carbon fiber-based conductive MPPO material of the present invention has good electrical conductivity and impact resistance, and also has excellent heat resistance and flame retardancy, which can extend the service life of the material.

[0034] In the modified flame retardant prepared by the present invention, the benzoxazine structure is a benzheterocyclic compound containing a six-membered heterocyclic ring with nitrogen and oxygen. It has good heat resistance and flame retardancy. During the combustion process, it forms a dense carbon layer, effectively isolating oxygen and heat. At the same time, it releases non-combustible gases, reduces the oxygen concentration in the combustion area, and slows down the combustion speed. Due to its high glass transition temperature, no small molecules are released during the curing process, and the shrinkage rate is low, endowing the modified flame retardant with excellent heat resistance. At the same time, polydopamine, rich in phenolic hydroxyl groups and amino groups, can react with free radicals at high temperatures, interrupt the combustion chain, further enhance the flame retardant effect, and because of its high thermal stability, it can maintain its structure at high temperatures, thereby delaying the thermal decomposition of the material. In addition, the phosphorus-nitrogen flame retardant 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, as a phosphaphenanthrene compound with high thermal stability, promotes the formation of a dense and continuous carbon layer during combustion, synergistically acts with polydopamine, effectively isolates oxygen and heat, inhibits combustion, and synergistically flame-retards with the phosphorus-oxygen double bond, extending its service life. In addition, the modified flame retardant prepared by the present invention is halogen-free, which helps to reduce environmental pollution and damage to the ecosystem, is harmless to human health, and realizes sustainable development.

[0035] The modified toughening agent prepared by the present invention, with the advantages of its macromolecular polymer, exhibits performance superior to that of traditional small molecule toughening agents. In the modified toughening agent, tetra-(4-aminophenoxy)methylmethane contains multiple amino groups and flexible phenoxy groups, which can significantly improve the toughness of PPO and polystyrene, enhance the intermolecular binding force of the polymer, improve the toughness of the resin, enhance the crosslinking density of the cured product, and thus improve the impact resistance. At the same time, the maleimide structure formed by its reaction with maleic anhydride, due to its high flexibility, enhances the flexibility of the molecular chain of the material, forms an interpenetrating network, relieves stress concentration under external force, and synergistically acts with the silicon-oxygen bond to further improve the impact resistance. In addition, the flexible -Si-O-Si- chain segments in the polymer have high bond energy and large bond angles, which can not only maintain stability but also relieve the internal thermal stress of the resin, improve the tensile strength of the resin, and comprehensively optimize the toughness and impact resistance of the material. Detailed implementation manners

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] Embodiment 1: A method for preparing a conductive MPPO material based on carbon fiber, specifically comprising the following steps:

[0038] S1. Weigh the raw materials by weight: 40 parts of PPO resin, 10 parts of polystyrene, 5 parts of modified flame retardant (prepared in this embodiment), 2 parts of modified toughening agent (prepared in this embodiment), 0.1 parts of antioxidant, 0.5 parts of lubricant, and 5 parts of carbon fiber; mix PPO resin, polystyrene, modified flame retardant, modified toughening agent, antioxidant 1010 and N,N-ethylene bisstearamide to obtain a mixed material;

[0039] S2. Add the mixed material and carbon fiber into a twin-screw extruder for extrusion granulation to obtain a conductive MPPO material based on carbon fiber, wherein the temperature of the twin-screw extruder is set to: zone 1: 180°C, zone 2: 280°C, zone 3: 280°C, zone 4: 280°C, zone 5: 280°C, zone 6: 240°C, zone 7: 240°C, zone 8: 240°C, die head temperature: 260°C, and the screw speed is 400r / min;

[0040] The modified flame retardant is prepared by the following method:

[0041] Step A1: 75 mL of toluene, 0.1 mol of aniline, 0.1 mol of 2-allyl-4-methylphenol and 0.2 mol of paraformaldehyde were mixed evenly, stirred thoroughly, heated to 90° C., and reacted for 5 h to obtain an intermediate product;

[0042] Step A2: 6.48 g of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, 40 mL of N,N-dimethylformamide and 0.03 mol of the intermediate product were mixed, stirred at 150° C. for 9 h, filtered, washed, and dried under vacuum at 60° C. for 24 h to obtain a pre-product;

[0043] Step A3: 6 g of the pre-product, 5 g of tris(hydroxymethyl)aminomethane) and 500 mL of deionized water were mixed, the pH was adjusted to 8.5, 2.4 g of dopamine hydrochloride was added, ultrasonic treatment was performed for 30 min, stirring was performed at room temperature for 24 h, vacuum filtration and washing were performed, and vacuum drying was performed at 60° C. for 24 h to obtain a modified flame retardant;

[0044] The modified toughening agent is prepared by the following method:

[0045] Step B1: 0.625 g of tetrakis-(4-aminophenoxy)methylmethane and 5 mL of N-methylpyrrolidone were mixed at 0° C. under nitrogen protection, stirred evenly, and then 0.49 g of maleic anhydride was added, and stirred at 0° C. for 1 h to obtain product a;

[0046] Step B2: Mix dodecylbenzenesulfonic acid with 45 mL of deionized water, raise the temperature to 45 °C, stir evenly, then slowly dropwise add 3 mol of decamethylcyclopentasiloxane and 5 mol of 3-allyloxypropyltrimethoxysilane, mix evenly, react for 3 h, cool to room temperature to obtain product b, and the dosage of dodecylbenzenesulfonic acid accounts for 1.4% of the total amount of deionized water in the system;

[0047] Step B3: Mix 5 g of product a and 2 g of product b, stir for 10 min, then add 0.34 g of azobisisobutyronitrile and 20 mL of ethanol and mix evenly, raise the temperature to 70 °C, react for 3 h, cool to room temperature to obtain the modified toughening agent.

[0048] Example 2: A preparation method of a carbon fiber-based conductive MPPO material, specifically including the following steps:

[0049] S1. Weigh the raw materials by weight: 55 parts of PPO resin, 20 parts of polystyrene, 12 parts of modified flame retardant (prepared in this example), 6 parts of modified toughening agent (prepared in this example), 3 parts of antioxidant, 1.2 parts of lubricant, and 10 parts of carbon fiber; Mix the PPO resin, polystyrene, modified flame retardant, modified toughening agent, antioxidant 1010 and N,N-ethylenebisstearamide to obtain a mixed material;

[0050] S2. Add the mixed material and carbon fiber into a twin-screw extruder for extrusion granulation to obtain a carbon fiber-based conductive MPPO material. Among them, the temperature of the twin-screw extruder is set as follows: Zone 1: 190 °C, Zone 2: 300 °C, Zone 3: 300 °C, Zone 4: 300 °C, Zone 5: 300 °C, Zone 6: 250 °C, Zone 7: 250 °C, Zone 8: 250 °C, head temperature: 270 °C, and the screw speed is 500 r / min;

[0051] The modified flame retardant is prepared by the following method:

[0052] Step A1: Mix 112 mL of toluene, 0.15 mol of aniline, 0.15 mol of 2-allyl-4-methylphenol and 0.3 mol of paraformaldehyde evenly, fully stir and then raise the temperature to 90 °C, react for 5 h to obtain an intermediate product;

[0053] Step A2: Mix 8.64 g of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, 50 mL of N,N-dimethylformamide and 0.04 mol of the intermediate product, stir at 150 °C for 9 h, filter and wash, and vacuum dry at 60 °C for 24 h to obtain a pre-product;

[0054] Step A3: Mix 7 g of the pre-product, 7.5 g of tris(hydroxymethyl)aminomethane, and 700 mL of deionized water, adjust the pH to 8.5, add 2.4 g of dopamine hydrochloride, perform ultrasonic treatment for 30 min, stir at room temperature for 24 h, carry out vacuum filtration and washing, and then dry in vacuum at 60 °C for 24 h to obtain the modified flame retardant;

[0055] The modified toughening agent is prepared by the following method:

[0056] Step B1: Mix 0.937 g of tetra(4-aminophenoxy)methane and 5 mL of N-methylpyrrolidone under nitrogen protection at 0 °C, stir evenly, then add 0.735 g of maleic anhydride, and stir at 7 °C for 1 h to obtain product a;

[0057] Step B2: Mix dodecylbenzenesulfonic acid and 45 mL of deionized water, raise the temperature to 45 °C, stir evenly, then slowly dropwise add 4 mol of decamethylcyclopentasiloxane and 6 mol of 3-allyloxypropyltrimethoxysilane, mix evenly, react for 3 h, and cool to room temperature to obtain product b. The dosage of dodecylbenzenesulfonic acid accounts for 1.4% of the total amount of deionized water in the system;

[0058] Step B3: Mix 6 g of product a and 3 g of product b, stir for 10 min, then add 0.43 g of azobisisobutyronitrile and 20 mL of ethanol, mix evenly, raise the temperature to 75 °C, react for 3 h, and cool to room temperature to obtain the modified toughening agent.

[0059] Example 3: A preparation method of a carbon fiber-based conductive MPPO material specifically includes the following steps:

[0060] S1. Weigh the raw materials by weight: 70 parts of PPO resin, 30 parts of polystyrene, 20 parts of modified flame retardant (prepared in this example), 10 parts of modified toughening agent (prepared in this example), 5 parts of antioxidant, 2 parts of lubricant, and 15 parts of carbon fiber; Mix the PPO resin, polystyrene, modified flame retardant, modified toughening agent, antioxidant 1010, and N,N'-ethylenebisstearamide to obtain a mixed material;

[0061] S2. Add the mixed material and carbon fiber into a twin-screw extruder for extrusion granulation to obtain a carbon fiber-based conductive MPPO material. Among them, the temperature settings of the twin-screw extruder are as follows: Zone 1: 200 °C, Zone 2: 320 °C, Zone 3: 320 °C, Zone 4: 320 °C, Zone 5: 320 °C, Zone 6: 260 °C, Zone 7: 260 °C, Zone 8: 260 °C, and the head temperature: 280 °C. The screw speed is 600 r / min;

[0062] The modified flame retardant is prepared by the following method:

[0063] Step A1: Mix 150 mL of toluene, 0.2 mol of aniline, 0.2 mol of 2 - allyl - 4 - methylphenol, and 0.4 mol of paraformaldehyde uniformly. After stirring well, heat the mixture to 90 °C and react for 5 h to obtain an intermediate product;

[0064] Step A2: Mix 10.8 g of 9,10 - dihydro - 9 - oxa - 10 - phosphaphenanthrene - 10 - oxide, 60 mL of N,N - dimethylformamide, and 0.05 mol of the intermediate product. Stir at 150 °C for 9 h, filter, wash, and dry in vacuum at 60 °C for 24 h to obtain a pre - product;

[0065] Step A3: Mix 8 g of the pre - product, 10 g of tris(hydroxymethyl)aminomethane, and 900 mL of deionized water. Adjust the pH to 8.5, add 2.4 g of dopamine hydrochloride, perform ultrasonic treatment for 30 min, stir at room temperature for 24 h, vacuum filter, wash, and dry in vacuum at 60 °C for 24 h to obtain a modified flame retardant;

[0066] The modified toughening agent is prepared by the following method:

[0067] Step B1: Mix 1.25 g of tetra(4 - aminophenoxy)methylmethane and 5 mL of N - methylpyrrolidone at 0 °C under nitrogen protection. Stir well, then add 0.98 g of maleic anhydride and stir at 15 °C for 1 h to obtain product a;

[0068] Step B2: Mix dodecylbenzenesulfonic acid and 45 mL of deionized water. Raise the temperature to 45 °C, stir well, then slowly dropwise add 5 mol of decamethylcyclopentasiloxane and 7 mol of 3 - allyloxypropyltrimethoxysilane, mix evenly, react for 3 h, and cool to room temperature to obtain product b. The dosage of dodecylbenzenesulfonic acid accounts for 1.4% of the total amount of deionized water in the system;

[0069] Step B3: Mix 7 g of product a and 4 g of product b, stir for 10 min, then add 0.52 g of azobisisobutyronitrile and 20 mL of ethanol and mix evenly. Raise the temperature to 80 °C, react for 3 h, and cool to room temperature to obtain the modified toughening agent.

[0070] Comparative Example 1: This comparative example is a carbon - fiber - based conductive MPPO material. The difference from Example 3 is that an equal amount of magnesium hydroxide is used instead of the modified flame retardant prepared in Example 3, and the rest are the same.

[0071] Comparative Example 2: This comparative example is a carbon - fiber - based conductive MPPO material. The difference from Example 3 is that an equal amount of silicone oil is used instead of the modified toughening agent prepared in Example 3, and the rest are the same.

[0072] Performance test: The carbon fiber-based conductive MPPO materials prepared in Examples 1-3 and Comparative Examples were cut into standard test sizes, and the surface resistivity was tested according to the IEC60093 standard; the notched impact strength was tested according to the ASTM D256 standard; the tensile strength was tested according to the ASTM D256638 standard; the heat distortion temperature was tested according to the ASTM D648 standard; the vertical burning performance was tested using the plastic combustion performance test method of GB / T2048-1996; the test results are shown in the following table:

[0073]

[0074] It can be seen from the data tested in Table 1 that the carbon fiber-based conductive MPPO material prepared by the present invention has excellent electrical conductivity and impact resistance. It can also be seen from the above table that the carbon fiber-based conductive MPPO material prepared by the present invention has good heat resistance and flame retardancy.

[0075] The above content is only an example and illustration of the concept of the present invention. Those skilled in the art of this technology can make various modifications or supplements to the specific embodiments described or use similar methods to replace them. As long as they do not deviate from the concept of the invention or exceed the scope defined by this claim book, they should all fall within the protection scope of the present invention.

Claims

1. A method for preparing a conductive MPPO material based on carbon fiber, characterized in that: The specific steps include: S1. Weigh the raw materials by weight: 40-70 parts of PPO resin, 10-30 parts of polystyrene, 5-20 parts of modified flame retardant, 2-10 parts of modified toughening agent, 0.1-5 parts of antioxidant, 0.5-2 parts of lubricant, and 5-15 parts of carbon fiber; mix the PPO resin, polystyrene, modified flame retardant, modified toughening agent, antioxidant and lubricant to obtain a mixed material; S2. Add the mixed material and carbon fiber into a twin-screw extruder for extrusion granulation to obtain a conductive MPPO material based on carbon fiber, wherein the temperature of the twin-screw extruder is set to: zone 1: 180-200°C, zone 2: 280-320°C, zone 3: 280-320°C, zone 4: 280-320°C, zone 5: 280-320°C, zone 6: 240-260°C, zone 7: 240-260°C, zone 8: 240-260°C, die head temperature: 260-280°C, and the screw speed is 400-600r / min; The modified flame retardant is prepared by the following method: Step A1: Mix toluene, aniline, 2-allyl-4-methylphenol and paraformaldehyde evenly, stir thoroughly, heat to 90° C., and react for 5 hours to obtain an intermediate product; Step A2: 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, N,N-dimethylformamide and the intermediate product were mixed, stirred at 150° C. for 9 h, filtered, washed, and vacuum dried at 60° C. for 24 h to obtain a pre-product; Step A3: the pre-product, tris(hydroxymethyl)aminomethane) and deionized water were mixed, the pH was adjusted to 8.5, dopamine hydrochloride was added, ultrasonic treatment was performed for 30 minutes, stirring was performed at room temperature for 24 hours, vacuum filtration was performed, washing was performed, and vacuum drying was performed at 60° C. for 24 hours to obtain a modified flame retardant; The modified toughening agent is prepared by the following method: Step B1: Tetrakis-(4-aminophenoxy)methylmethane and N-methylpyrrolidone were mixed at 0°C under nitrogen protection, stirred evenly, and then maleic anhydride was added, and stirred at 0-15°C for 1 hour to obtain product a; Step B2: dodecylbenzenesulfonic acid and deionized water were mixed, the temperature was raised to 45°C, and the mixture was stirred evenly. Then, decamethylcyclopentasiloxane and 3-allyloxypropyltrimethoxysilane were slowly added dropwise, the mixture was mixed evenly, and the mixture was reacted for 3 hours. The mixture was cooled to room temperature to obtain product b. Step B3: Mix product a and product b, stir for 10 minutes, then add azobisisobutyronitrile and ethanol and mix evenly, heat to 70-80° C., react for 3 hours, and cool to room temperature to obtain a modified toughening agent.

2. The method for preparing a conductive MPPO material based on carbon fiber according to claim 1, characterized in that: In step A1, the usage ratio of toluene, aniline, 2-allyl-4-methylphenol and paraformaldehyde is 75-150 mL: 0.1-0.2 mol: 0.1-0.2 mol: 0.2-0.4 mol.

3. The method for preparing a conductive MPPO material based on carbon fiber according to claim 1, characterized in that: In step A2, the usage ratio of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, N,N-dimethylformamide and the intermediate product is 6.48-10.8 g: 40-60 mL: 0.03-0.05 mol.

4. The method for preparing a conductive MPPO material based on carbon fiber according to claim 1, characterized in that: In step A3, the dosage ratio of the pre-product, tris(hydroxymethyl)aminomethane, deionized water and dopamine hydrochloride is 6-8 g: 5-10 g: 500-900 mL: 2.4 g.

5. The method for preparing a conductive MPPO material based on carbon fiber according to claim 1, characterized in that: In step B1, the usage ratio of tetrakis-(4-aminophenoxy)methylmethane, N-methylpyrrolidone and maleic anhydride is 0.625-1.25 g:5 mL:0.49-0.98 g.

6. The method for preparing a conductive MPPO material based on carbon fiber according to claim 1, characterized in that: In step B2, the usage ratio of deionized water, decamethylcyclopentasiloxane and 3-allyloxypropyltrimethoxysilane is 45 mL: 3-5 mol: 5-7 mol, and the usage of dodecylbenzenesulfonic acid accounts for 1.4% of the total amount of deionized water in the system.

7. The method for preparing a conductive MPPO material based on carbon fiber according to claim 1, characterized in that: In step B3, the usage ratio of product a, product b, azobisisobutyronitrile and ethanol is 5-7 g: 2-4 g: 0.34-0.52 g: 20 mL.

8. A conductive MPPO material based on carbon fiber, characterized in that: Prepared according to the preparation method according to any one of claims 1 to 7.

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