WO2018010347A1

WO2018010347A1 - Antistatic nanofiber nonwoven material and manufacturing method

Info

Publication number: WO2018010347A1
Application number: PCT/CN2016/105640
Authority: WO
Inventors: 邱邦胜; 黄肖瑶
Original assignee: 江苏盛纺纳米材料科技股份有限公司
Priority date: 2016-07-12
Filing date: 2016-11-14
Publication date: 2018-01-18
Also published as: CN106003934B; CN106003934A

Abstract

An antistatic nanofiber nonwoven material and manufacturing method. The nonwoven material comprises: a first hydrophilic layer (1), an antistatic composite layer (2), and a second hydrophilic (3) provided from top to bottom in that order. The antistatic composite layer (2) is assembled by alternatively stacking an antistatic nanofiber layer and a conductive nanofiber layer on each other. The first hydrophilic layer (1) and the second hydrophilic layer (3) are manufactured using a hydrophilic polypropylene nanofiber material prepared using a hydrophilized polypropylene, thereby improving an antistatic performance of the nonwoven material. The material has simple processing techniques and a low cost, is not affected by environmental humidity, and has excellent hydrophilic properties.

Description

Antistatic nano fiber nonwoven material and preparation method thereof

Technical field

The invention belongs to the field of non-woven materials, and in particular relates to an antistatic nanofiber nonwoven material and a preparation method thereof.

Background technique

Nonwoven materials are also known as nonwovens, nonwovens, nonwovens, nonwovens or nonwovens. The non-manufactured material is a fabric formed without the need of a woven fabric, and is a novel soft, permeable and planar structure formed by directly using high polymer chips, short fibers or filaments by various web forming methods and consolidation techniques. Fiber products. Because non-woven materials have the characteristics of short process, high production speed, high output, low cost, wide application and many raw materials, they are in many fields such as aerospace technology, environmental protection, agricultural technology, medical care or people's daily life. Non-woven new materials have become an increasingly important and important product.

However, prior art nonwoven materials, such as spunbonded nonwovens, needled nonwovens, heat-sealable nonwovens, and the like, are susceptible to electrostatic problems due to friction during use. Therefore, antistatic fibers are generally added to the nonwoven material. The antistatic fibers generally use conductive fibers and antistatic fibers, and the antistatic principle of the antistatic fibers relies on the addition of an antistatic agent to improve the hydrophilic hygroscopicity of the surface and thereby increase the conductivity. Sexuality, although it has improved antistatic effect of fiber and fabric, but its antistatic property is mainly realized by absorbing moisture in the air, so its antistatic effect is closely related to the humidity of the environment, when the ambient humidity is very low. The antistatic effect is weak or even disappears, and the washing durability and durability of the antistatic fiber need to be improved. Therefore, the antistatic nonwoven material prepared by adding the antistatic agent fiber in the prior art has antistatic property. Poor persistence.

Summary of the invention

In view of the deficiencies of the prior art, one of the objects of the present invention is to provide an antistatic nanofiber nonwoven material which has long-lasting antistatic properties and excellent hydrophilic properties.

To this end, the present invention employs the following technical solutions:

An antistatic nanofiber nonwoven material comprising a first hydrophilic layer, an antistatic composite layer and a second hydrophilic layer disposed in sequence from top to bottom; the antistatic composite layer is composed of an antistatic nanofiber layer and a conductive nanometer The fiber layers are alternately laminated; the first hydrophilic layer and the second hydrophilic layer are prepared from a hydrophilic polymer nanofiber material made of a hydrophilically treated polymer.

Conductive fiber is a functional fiber that eliminates static electricity by electron conduction and corona discharge, and generally refers to a fiber having a resistivity of less than 10 ⁸ Ω·cm under standard conditions (20 ° C, 65% RH), preferably 10 ² ～ 10 ⁸ Ω·cm, even lower resistivity. Such fibers have good electrical conductivity and durability, and particularly have good durability and antistatic properties under low humidity, and therefore have great applications in industrial and civil fields.

Wherein, the conductive nanofiber layer is made of a sea-island type nanofiber material prepared by a composite spinning process of a polyester to which a conductive masterbatch is added. The island-type nanofiber material has high coverage, greatly improved moisture absorption performance; soft hand feeling, because the fiber is ultra-fine, the fiber is softer, and the fabric thus produced can produce capillary wicking action, so that the fabric absorbs more moisture, and Moisture moves to the surface of the fabric, causing it to evaporate, increasing the comfort of wearing, and the fabric made of the island-type nanofiber material has a soft gloss. The polyester may be a polyester material commonly used in the art, such as one of polyethylene terephthalate, polytrimethylene terephthalate or polybutylene terephthalate.

The nanofiber of the sea-island type nanofiber material has a diameter of 50 to 300 nm, for example, 50 nm, 100 nm, 150 nm, 200 nm, 250 nm, and 300 nm.

Wherein, the conductive masterbatch is prepared by extrusion granulation of raw carbon fiber, polyaniline, coupling agent and polypropylene through an extruder.

Carbon fiber is a new type of fiber material with high strength and high modulus fiber with carbon content above 95%. It is a microcrystalline graphite material obtained by stacking organic fibers such as flake graphite crystallites along the axial direction of the fiber and carbonizing and graphitizing. Carbon fiber is lighter than metal aluminum, but its strength is higher than that of steel. It has corrosion-resistant and high-modulus properties. It not only has the inherent intrinsic properties of carbon materials, but also has the soft processability of textile fibers. It is a new generation of reinforcement. fiber. Carbon fiber has many excellent properties. Carbon fiber has high axial strength and modulus, low density, high specific performance, no creep, high temperature resistance in non-oxidizing environment, good fatigue resistance, good electrical and thermal conductivity, good electromagnetic shielding, etc. .

Compared with other conductive polymers, polyaniline is one of the most promising conductive polymers because of its low cost, stable properties and good electrical conductivity. However, due to the strong rigidity of the polyaniline chain and the strong interaction between the chains, its solubility is extremely poor, it does not melt, and the corresponding workability and spinnability are also poor, which limits its wide application in technology.

Polypropylene fiber is one of the important synthetic fiber varieties, with many excellent properties, such as light weight, heat insulation, abrasion resistance, easy drying, good chemical resistance, etc., and the raw material price is very low, energy consumption during production and processing. There are obvious advantages in terms of energy utilization and waste recycling. However, due to the electrical insulation of polypropylene fibers, the moisture absorption and electrostatic effects are large, which limits the application range or affects the application effect.

Wherein, the raw material of the conductive mother particle comprises 0.1 to 5 parts of carbon fiber, 5 to 15 parts of polyaniline, 0.1 to 2 parts of a coupling agent, and 80 to 90 parts of polypropylene; for example, carbon fiber by mass part. 0.1 parts, 0.5 parts, 0.8 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts; polyaniline is 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts Parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts; coupling agent is 0.1 parts, 0.2 parts, 0.3 parts, 0.4 parts, 0.5 parts, 0.8 parts, 1 part, 1.2 parts, 1.4 parts, 1.5 parts , 1.6 parts, 1.8 parts, 2 parts; polypropylene is 80 parts, 81 parts, 82 parts, 83 parts, 84 parts, 85 parts, 86 parts, 87 parts, 88 parts, 89 parts, 90 parts.

Wherein, the antistatic nanofiber layer is made of polypropylene added with carbon nanotubes and an antistatic agent. The electrospinning process is prepared; the addition of carbon nanotubes improves the distribution of the electric field around the antistatic agent, promotes the charge dissipation process of the conductive layer formed on the surface of the antistatic agent, and improves the polypropylene fiber. Antistatic properties; and the addition of carbon nanotubes reduces the amount of antistatic agent used. Preferably, the total mass of the carbon nanotubes and the antistatic agent is from 1 to 5% by mass of the polypropylene, for example, the total mass of the carbon nanotubes and the antistatic agent accounts for 1 of the polypropylene. %, 2%, 3%, 4%, 5%.

Preferably, the carbon nanotubes are subjected to high temperature graphitization treatment, wherein the carbon nanotubes are placed in a sintering furnace and treated under an inert gas atmosphere at 2500 ° C and 3 atm for 4 h. After the carbon nanotubes are graphitized by high temperature, the carbon ring planar units gradually parallel and overlap each other at high temperature, and the adjacent distances are continuously reduced, so that the gaps and pores between the original planar layers disappear; the high temperature graphitization treatment makes the carbon The lattice structure of the nanotubes is transformed, and the amorphous component is transformed into a crystalline structure. In three dimensions, the crystal grows, the lattice interface decreases, the scattering of electrons on the grain boundaries decreases, and the resistivity decreases, effectively improving. The degree of crystallinity of the carbon nanotubes makes the conductivity significantly improved.

Wherein, the number of layers of the antistatic nanofiber layer and the conductive nanofiber layer is 1 to 10; for example, the number of layers of the antistatic nanofiber layer and the conductive nanofiber layer is 1 layer, 2 Layer, 3, 4, 5, 6, 7, 7, 8, and 10.

The second object of the present invention is to provide a method for preparing an antistatic nanofiber nonwoven material, which is simple in preparation, and the prepared antistatic nanofiber nonwoven material has good hydrophilic property and long antistatic property, and includes the following steps. :

1) preparing a hydrophilic polypropylene nanofiber material from hydrophilically treated polypropylene;

2) preparing an antistatic nanofiber material by an electrospinning process from a polypropylene to which carbon nanotubes and an antistatic agent are added;

3) preparing a sea-island type nanofiber material by a composite spinning process from a polyester to which a conductive master batch is added;

4) taking the antistatic nanofiber material prepared in step 2) as an antistatic nanofiber layer, and the steps are 3) The prepared island-in-the-sea nanofiber material is used as a conductive nanofiber layer, and the antistatic nanofiber layer and the conductive nanofiber layer are alternately stacked to form an antistatic composite layer; on the upper and lower sides of the antistatic composite layer The hydrophilic polypropylene nanofiber materials prepared in the step 1) are separately prepared, and the composites having the first hydrophilic layer, the antistatic composite layer and the second hydrophilic layer disposed in this order from top to bottom are prepared by a hot air bonding process. Electrostatic nanofiber nonwoven material.

Wherein, in the step 1), the hydrophilic treatment process is: preparing polypropylene into a polypropylene fiber after spinning, and mixing the hydrophilic agent and the purified water in a mass ratio of 1: (100 to 200). Thereafter, a hydrophilic aqueous solution is prepared, coated on the polypropylene fiber, and dried to prepare a hydrophilic polypropylene nanofiber material, and the hydrophilic agent is a hydrophilic agent commonly used in the art.

Wherein, the conductive masterbatch prepared in the step 3) is prepared by first drying the carbon fiber, the polyaniline and the polypropylene, and then, according to the mass part, 0.1 to 5 parts of the carbon fiber after drying, 5 to 15 parts by weight. Polyaniline, 80-90 parts of polypropylene, added to the mixer together with 0.1 to 2 parts of coupling agent to obtain a mixture, and the uniformly mixed mixture is added to a twin-screw extruder, extruded and granulated, and dried. After the preparation of the conductive masterbatch.

Wherein the mixing temperature is 60 to 150 ° C, such as 60 ° C, 70 ° C, 80 ° C, 90 ° C, 100 ° C, 110 ° C, 120 ° C, 130 ° C, 140 ° C, 150 ° C; the screw extruder The rotation speed of the middle screw is 100-300r/min, for example, 100r/min, 150r/min, 200r/min, 250r/min, 300r/min; the extrusion temperature is 180-260°C, for example 180°C, 190°C 200 ° C, 210 ° C, 220 ° C, 230 ° C, 240 ° C, 250 ° C, 260 ° C; the drying temperature is 60 ~ 100 ° C, such as 60 ° C, 70 ° C, 80 ° C, 90 ° C, 100 ° C; The drying time is 6 to 12 hours, for example, 6h, 7h, 8h, 9h, 10h, 11h, 12h.

Compared with the prior art, the beneficial effects of the present invention are: the antistatic nanofiber nonwoven material of the present invention, comprising a first hydrophilic layer, an antistatic composite layer and a second hydrophilic layer disposed in order from top to bottom; The antistatic composite layer is composed of an alternating layer of an antistatic nanofiber layer and a conductive nanofiber layer; A hydrophilic layer and the second hydrophilic layer are prepared from a hydrophilic polypropylene nanofiber material made of hydrophilically treated polypropylene; the antistatic nanofiber layer provides antistatic properties of the antistatic nano material The method has the advantages of simple processing and low cost, and the conductive nanofiber layer has long-lasting antistatic property. After repeated washing, it still has good antistatic property and is not affected by environmental humidity; the antistatic composite layer combines antistatic The advantages of the nanofiber layer and the conductive nanofiber layer, the two together work to make the antistatic nano material have long-lasting antistatic property; the first hydrophilic layer and the second hydrophilic layer make the hydrophilicity of the antistatic nanofiber nonwoven material Excellent performance.

The preparation method of the antistatic nanofiber nonwoven material of the invention has simple preparation method, and the prepared antistatic nanofiber nonwoven material has good hydrophilic property and long antistatic property.

DRAWINGS

1 is a schematic structural view of an antistatic nanofiber nonwoven material of the present invention;

2 is a schematic view showing the structure of an antistatic composite layer in the antistatic nanofiber nonwoven material of FIG. 1.

The reference numerals are as follows:

1-first hydrophilic layer; 2-antistatic composite layer; 3-second hydrophilic layer; 4-antistatic nanofiber layer; 5-conductive nanofiber layer.

detailed description

The technical solution of the present invention will be further described below with reference to FIG. 1 and FIG. 2 and by way of specific embodiments.

As shown in FIG. 1 and 2, an antistatic nanofiber nonwoven material of the present invention comprises a first hydrophilic layer 1, an antistatic composite layer 2 and a second hydrophilic layer 3 disposed in this order from top to bottom; The electrostatic composite layer 2 is composed of an alternating layer of an antistatic nanofiber layer 4 and a conductive nanofiber layer 5; the first hydrophilic layer 1 and the second hydrophilic layer 3 are hydrophilic polypropylene made of hydrophilically treated polypropylene. Nanofiber material is prepared. The antistatic nanofiber layer improves the antistatic property of the antistatic nano material, the processing method is simple and the cost is low, and the conductive nanofiber layer has long-lasting antistatic property, and is still good after repeated washing. Antistatic property, and is not affected by environmental humidity; antistatic composite layer combines the advantages of antistatic nanofiber layer and conductive nanofiber layer, and the two work together to make antistatic nano material have long-lasting antistatic property; A hydrophilic layer and a second hydrophilic layer make the antistatic nanofiber nonwoven material excellent in hydrophilic properties.

Example 1

2) Preparation of antistatic nanofiber material by electrospinning of polypropylene with carbon nanotubes and antistatic agent; the total mass of carbon nanotubes and antistatic agent accounts for 1% of polypropylene; Graphitization treatment, high temperature graphitization treatment process: carbon nanotubes are placed in a sintering furnace, under inert gas protection at 2500 ° C and 3 atmospheres for 4 h;

3) First, dry the carbon fiber, polyaniline, and polypropylene, and then add 1 part of the carbon fiber after drying, 10 parts of polyaniline, 85 parts of polypropylene, and 0.5 part of the coupling agent together by mass. Mixing into a mixer to obtain a mixture, controlling the mixing temperature to 60 ° C, adding the uniformly mixed mixture to a twin-screw extruder, extruding and granulating, controlling the screw speed of the screw extruder to 150 r / min, and squeezing The temperature is 190 ° C, and after drying, the conductive masterbatch is prepared, wherein the drying temperature is 60 ° C, and the drying time is 12 h; then the prepared conductive master batch is added to the polyethylene terephthalate. Preparation of island-type nanofiber materials by composite spinning process;

4) The antistatic nanofiber material prepared in the step 2) is used as the antistatic nanofiber layer 4, and the island-in-sea nanofiber material prepared in the step 3) is used as the conductive nanofiber layer 5, and the antistatic nanofiber layer 4 is The conductive nanofiber layer 5 is alternately stacked to form an antistatic composite layer 2; the hydrophilic polypropylene nanofiber material prepared in the step 1) is separately disposed on the upper and lower sides of the antistatic composite layer 2, and is prepared by a hot air bonding process. An antistatic nanofiber nonwoven material having a first hydrophilic layer 1, an antistatic composite layer 2, and a second hydrophilic layer 3 disposed in this order from top to bottom.

The properties of the antistatic nanofiber nonwoven material prepared in this example were tested, and the hydrophilic ratio was 650%, the surface resistivity was 6×10 ⁸ Ω, and the antistatic property was good after repeated washing.

Example 2

2) Preparation of antistatic nanofiber material by electrospinning of polypropylene with carbon nanotubes and antistatic agent; the total mass of carbon nanotubes and antistatic agent accounts for 3% of polypropylene; Graphitization treatment, high temperature graphitization treatment process: carbon nanotubes are placed in a sintering furnace, under inert gas protection at 2500 ° C and 3 atmospheres for 4 h;

3) First, dry the carbon fiber, polyaniline, and polypropylene, and then add 0.5 parts of the carbon fiber after drying, 5 parts of polyaniline, 80 parts of polypropylene, and 0.5 part of the coupling agent together by mass. Mixing into a mixer to obtain a mixture, controlling the mixing temperature to 120 ° C, adding the uniformly mixed mixture to a twin-screw extruder, extruding and granulating, controlling the screw rotation speed of the screw extruder to 100 r / min, and squeezing The temperature is 230 ° C, and after drying, the conductive masterbatch is prepared, wherein the drying temperature is 100 ° C, and the drying time is 6 h; then the prepared conductive master batch is added to the polybutylene terephthalate. Preparation of island-type nanofiber materials by composite spinning process;

The properties of the antistatic nanofiber nonwoven material prepared in this example were tested, and the hydrophilicity ratio was 710%, and the surface resistivity was 9×10 ⁷ Ω, which still had good antistatic properties after repeated washing.

Example 3

2) Preparation of antistatic nanofiber material by electrospinning of polypropylene with carbon nanotubes and antistatic agent; the total mass of carbon nanotubes and antistatic agent accounts for 5% of polypropylene; Graphitization treatment, high temperature graphitization treatment process: carbon nanotubes are placed in a sintering furnace, under inert gas protection at 2500 ° C and 3 atmospheres for 4 h;

3) First, dry the carbon fiber, polyaniline, and polypropylene, and then add 3 parts of the carbon fiber after drying, 8 parts of polyaniline, 90 parts of polypropylene, and 2 parts of the coupling agent together by mass. Mixing into the mixer to obtain a mixture, controlling the mixing temperature to 90 ° C, adding the uniformly mixed mixture to the twin-screw extruder, extruding and granulating, controlling the screw rotation speed of the screw extruder to 300 r / min, and squeezing The temperature is 200 ° C, and after drying, the conductive masterbatch is prepared, wherein the drying temperature is 70 ° C, and the drying time is 10 h; then the prepared conductive master batch is added to the polytrimethylene terephthalate to be composite spun. Preparation of island-type nanofiber materials by silk process;

The properties of the antistatic nanofiber nonwoven material prepared in this example were tested, and the hydrophilic ratio was 780%, the surface resistivity was 9×10 ⁸ Ω, and the antistatic property was good after repeated washing.

Example 4

2) Preparation of antistatic nanofiber material by electrospinning of polypropylene with carbon nanotubes and antistatic agent; the total mass of carbon nanotubes and antistatic agent accounts for 4% of polypropylene; Graphitization treatment, high temperature graphitization treatment process: carbon nanotubes are placed in a sintering furnace, under inert gas protection at 2500 ° C and 3 atmospheres for 4 h;

3) First, dry the carbon fiber, polyaniline, and polypropylene, and then add 5 parts of the carbon fiber after drying, 15 parts of polyaniline, and 82 parts of polypropylene together with 1 part of the coupling agent. Mixing into a mixer to obtain a mixture, controlling the mixing temperature to 150 ° C, adding the uniformly mixed mixture to a twin-screw extruder, extruding and granulating, controlling the screw speed in the screw extruder to be 200 r/min, and extruding The temperature is 260 ° C, and after drying, the conductive masterbatch is prepared, wherein the drying temperature is 80 ° C, and the drying time is 8 h; then the prepared conductive master batch is added to the polyethylene terephthalate. Preparation of island-type nanofiber materials by composite spinning process;

The properties of the antistatic nanofiber nonwoven material prepared in this example were tested, and the hydrophilic ratio was 590%, the surface resistivity was 3×10 ⁹ Ω, and the antistatic property was good after repeated washing.

The antistatic nanofiber nonwoven material of the invention has good hydrophilic properties and long antistatic property.

Although the numerical ranges (sizes, process parameters) referred to in the present invention are not recited in the above embodiments, those skilled in the art can fully realize that any numerical value falling within the above numerical range can be implemented. The invention, of course, also includes any combination of specific values within a range of numerical values. Herein, for the sake of consideration, embodiments that give specific values within a certain numerical range or a plurality of values are omitted, and this should not be considered as insufficient disclosure of the technical solutions of the present invention.

The Applicant declares that the present invention illustrates the technical principle of the present invention by the above embodiments. The descriptions are merely illustrative of the principles of the invention and are not to be construed as limiting the scope of the invention. It should be apparent to those skilled in the art that any modifications of the present invention, equivalent substitution of the various materials of the products of the present invention, addition of auxiliary components, selection of specific means, and the like, are all within the scope of the present invention.

Claims

An antistatic nanofiber nonwoven material, comprising: a first hydrophilic layer (1), an antistatic composite layer (2) and a second hydrophilic layer (3) disposed in order from top to bottom; The antistatic composite layer (2) is composed of an alternating layer of an antistatic nanofiber layer (4) and a conductive nanofiber layer (5); the first hydrophilic layer (1) and the second hydrophilic layer (3) are composed of Prepared from a hydrophilic polypropylene nanofiber material made of hydrophilically treated polypropylene.
The antistatic nanofiber nonwoven material according to claim 1, wherein the conductive nanofiber layer (5) is an island-in-the-sea nanofiber prepared by a composite spinning process from a polyester to which a conductive masterbatch is added. Made of materials.
The antistatic nanofiber nonwoven material according to claim 2, wherein the sea-island type nanofiber material has a nanofiber diameter of 50 to 300 nm.
The antistatic nanofiber nonwoven material according to claim 1, wherein the conductive masterbatch is prepared by extrusion granulation of a raw material carbon fiber, a polyaniline, a coupling agent, and a polypropylene through an extruder.
The antistatic nanofiber nonwoven material according to claim 4, wherein the conductive masterbatch comprises 0.1 to 5 parts by weight of carbon fibers, 5 to 15 parts of polyaniline, and 0.1 to 0.1 parts by mass of the conductive masterbatch. 2 parts, 80-90 parts of polypropylene.
The antistatic nanofiber nonwoven material according to claim 1, wherein the antistatic nanofiber layer (4) is prepared by an electrospinning process of polypropylene with carbon nanotubes and an antistatic agent added thereto. to make;

Preferably, the total mass of the carbon nanotubes and the antistatic agent is from 1 to 5% by mass of the polypropylene;

Preferably, the carbon nanotubes are subjected to high temperature graphitization treatment, wherein the carbon nanotubes are placed in a sintering furnace and treated under an inert gas atmosphere at 2500 ° C and 3 atm for 4 h.
The antistatic nanofiber nonwoven material according to claim 1, wherein the antistatic nanofiber layer (4) and the conductive nanofiber layer (5) have a layer number of 1 to 10 layers.
A method for preparing an antistatic nanofiber nonwoven material according to claim 1, comprising the steps of:

1) preparing a hydrophilic polypropylene nanofiber material from hydrophilically treated polypropylene;

2) preparing an antistatic nanofiber material by an electrospinning process from a polypropylene to which carbon nanotubes and an antistatic agent are added;

3) preparing a sea-island type nanofiber material by a composite spinning process from a polyester to which a conductive master batch is added;

4) using the antistatic nanofiber material prepared in the step 2) as the antistatic nanofiber layer (4), and using the island-in-sea nanofiber material prepared in the step 3) as the conductive nanofiber layer (5), the antistatic nanofiber The layer (4) and the conductive nanofiber layer (5) are alternately stacked to form an antistatic composite layer (2); and the hydrophilicity prepared in the step 1) is respectively disposed on the upper and lower sides of the antistatic composite layer (2) The polypropylene nanofiber material is prepared by a hot air bonding process to obtain an antistatic having a first hydrophilic layer (1), an antistatic composite layer (2) and a second hydrophilic layer (3) arranged in this order from top to bottom. Nanofiber nonwovens.
The preparation method according to claim 8, wherein the conductive master batch in the step 3) is prepared by first drying the carbon fiber, the polyaniline, the polypropylene, and then, after being dried, the dried mass. 0.1 to 5 parts of carbon fiber, 5 to 15 parts of polyaniline, 80 to 90 parts of polypropylene, and 0.1 to 2 parts of a coupling agent are added to a mixer to be uniformly mixed to obtain a mixture, and a uniformly mixed mixture is added to the mixture. In a screw extruder, extrusion granulation and drying are carried out to obtain conductive master batches.
The preparation method according to claim 9, wherein the mixing temperature is 60 to 150 ° C, the rotation speed of the screw in the screw extruder is 100 to 300 r/min, and the extrusion temperature is 180. ～260° C., the drying temperature is 60 to 100° C., and the drying time is 6 to 12 h.