CN113529202B

CN113529202B - Antistatic DTY (draw textured yarn) and preparation process thereof

Info

Publication number: CN113529202B
Application number: CN202110682546.XA
Authority: CN
Inventors: 林传付; 王旺; 方友忠; 林玉明
Original assignee: Hangzhou Yemao Textile Co ltd
Current assignee: Hangzhou Yemao Textile Co ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2023-06-02
Anticipated expiration: 2041-06-17
Also published as: CN113529202A

Abstract

The application relates to the field of DTY (draw textured yarn) wires, and particularly discloses an antistatic DTY wire and a preparation process thereof. The raw materials of the antistatic DTY yarn comprise 100-120 parts of polycaprolactam slices, 3-5 parts of water scavenger, 0.5-2 parts of antistatic agent and 0.3-0.4 part of defoamer; wherein the antistatic agent comprises the following components in percentage by weight: 30-40% of high-carbon alcohol polyoxyethylene ether phosphate potassium salt, 20-30% of isomeric alcohol polyoxyethylene ether phosphate potassium salt and 30-45% of porous carbon nano tube. The preparation method of the antistatic DTY yarn comprises the following steps: s1: the polycaprolactam is sliced, dehydrated, antistatic agent and defoamer are stirred and mixed uniformly according to the proportion to obtain a mixture; s2: melt spinning the mixture to obtain coarse filaments; s3: oiling the coarse silk with auxiliary oiling agent, and drying; the method has the advantage of improving the durability and antistatic capability of the DTY silk thread.

Description

Antistatic DTY (draw textured yarn) and preparation process thereof

Technical Field

The application relates to the field of DTY (draw textured yarn) wires, in particular to an antistatic DTY wire and a preparation process thereof.

Background

DTY filaments, also called draw textured filaments, are finished filaments that are continuously or simultaneously drawn on a texturing machine and textured by a twister. Usually, nylon or terylene and other artificial fibers are adopted as raw materials of the DTY. DTY filaments are ideal materials for various knitting or weaving processes.

At present, because the insulation resistance of artificial fiber materials such as nylon, terylene and the like is higher, static electricity is easy to generate when the DTY fiber materials prepared from the fiber materials are rubbed, and the static electrode is easy to leak, so that the problems of broken ends, fly adhesion and the like are caused in the processing process of the silk yarns, and the yield is greatly reduced. And the physical condition of people in electrostatic environment for a long time can also be problematic. The relatively concentrated discharge of static electricity also causes the danger of combustion explosion and the like. Therefore, antistatic materials are usually added to the raw materials of the silk thread or antistatic oil is added to the silk thread during the processing of the silk thread, thereby improving the antistatic performance of the silk thread. The antistatic principle of the traditional antistatic agent is as follows: because the traditional antistatic agent has lower relative molecular mass, the antistatic agent can continuously migrate from the inside in the use process of the silk thread by surface treatment or adding the antistatic agent into the silk thread raw material, and the hydrophilic groups at the end of the antistatic agent absorb moisture in the air and dredge electrostatic charge, thereby playing a role in reducing the surface resistance.

With respect to the related art as described above, the inventors considered that the conventional antistatic agent reduces the electrostatic effect by means of the continuous migration to the surface, which makes the antistatic property of the yarn gradually disappear and the durability to be improved in daily continuous use and washing processes.

Disclosure of Invention

In order to improve the durability of antistatic capability of the DTY silk thread, the application provides an antistatic DTY silk thread and a preparation process thereof.

An antistatic DTY yarn is prepared from the following raw materials in parts by weight:

wherein the antistatic agent comprises the following components in percentage by weight:

30-40% of high-carbon alcohol polyoxyethylene ether phosphate potassium salt;

20-30% of isomeric alcohol polyoxyethylene ether phosphate potassium salt;

30-45% of porous carbon nano tube.

Through adopting the technical scheme, the antistatic agent is obtained by compounding high-carbon alcohol polyoxyethylene ether potassium phosphate, isomeric alcohol polyoxyethylene ether potassium phosphate and a porous carbon nanotube, and the high-carbon alcohol polyoxyethylene ether potassium phosphate and the isomeric alcohol polyoxyethylene ether potassium phosphate can produce synergistic effect with the porous carbon nanotube, so that the antistatic effect of the prepared silk thread is improved, and the durability of the antistatic effect is enhanced. The existing synergistic principle is that the porous carbon nanotube can produce adsorption action on the high-carbon alcohol polyoxyethylene ether potassium phosphate and the isomeric alcohol polyoxyethylene ether potassium phosphate, the adsorption action improves the closely linked degree of the high-carbon alcohol polyoxyethylene ether potassium phosphate and the isomeric alcohol polyoxyethylene ether potassium phosphate, so that static electricity generated on the silk thread is more easily and rapidly neutralized, and the migration action of the high-carbon alcohol polyoxyethylene ether potassium phosphate and the isomeric alcohol polyoxyethylene ether potassium phosphate is reduced, so that the durability of the antistatic capacity of the silk thread is improved.

Preferably, the length of the porous carbon nano tube is selected from 100-1000nm, and the tube diameter is 5-20nm.

By adopting the technical scheme, the length of the porous carbon nano tube is selected to be between 100 and 1000nm, so that the carbon nano tube can be dispersed in the matrix more uniformly while the matrix is kept to have certain strength. Too long a length of carbon nanotubes can result in too high strength of the matrix and the resulting filaments are prone to breakage, while too short a length of carbon nanotubes can result in a greater amount of carbon nanotubes in the matrix that is needed to form the conductive network pathways.

Preferably, the porous carbon nanotube is pretreated before being used as a raw material to prepare the antistatic DTY wire, and the pretreatment comprises the following steps:

step 1: adding the porous carbon nano tube into mixed acid formed by mixing concentrated nitric acid and concentrated sulfuric acid according to the mass ratio of 1:1, carrying out ultrasonic treatment, and filtering to obtain a crude pretreated porous carbon nano tube;

step 2: rinsing the crude pretreated porous carbon nanotube with deionized water until the eluent is neutral, and drying the porous carbon nanotube to obtain the pretreated porous carbon nanotube.

By adopting the technical scheme, after the porous carbon nanotube is treated by the mixed acid liquid of the concentrated nitric acid and the concentrated sulfuric acid, more pits or holes are formed on the surface of the porous carbon nanotube by corrosion, the specific surface area of the porous carbon nanotube is increased, the adsorption effect of the porous carbon nanotube on the high-carbon alcohol polyoxyethylene ether potassium phosphate and the isomeric alcohol polyoxyethylene ether potassium phosphate is improved, a better conductive network is formed in a matrix, and the antistatic performance of the silk thread is further improved.

Preferably, the pretreated porous carbon nanotubes are subjected to modification treatment, and the modification treatment comprises the following steps:

step 1: performing polypyrrole grafting reaction on the pretreated porous carbon nanotubes;

step 2: and carrying out coordination reaction on the polypyrrole grafted porous carbon nano tube by using organic acid.

By adopting the technical scheme, the surface of the modified porous carbon nanotube is modified after the grafting of polypyrrole and the coordination reaction between organic acid and amino in polypyrrole, so that the agglomeration of the porous carbon nanotube is reduced. And the modified porous carbon nano tube and the matrix can form a good interface structure, so that the dispersion performance of the porous carbon nano tube in the matrix is improved.

Preferably, the organic acid used in the modification process of the porous carbon nanotube is erucic acid.

By adopting the technical scheme, the erucic acid is used as the organic acid to carry out the coordination reaction with the amino in the polypyrrole to form the erucic acid amide, and the dispersing degree of the porous carbon nano tube in the matrix can be effectively improved by the erucic acid amide. Secondly, the erucamide can also improve the lubricating property of the modified porous carbon nano tube on the surface of the silk thread to a certain extent. The lubrication performance of the silk thread is improved, so that the friction resistance between the silk thread and equipment used in the textile production process can be reduced, and the possibility of static electricity generation is reduced to a certain extent.

In a second aspect, the present application provides a process for preparing an antistatic DTY filament, which adopts the following technical scheme:

the preparation process of the antistatic DTY yarn comprises the following steps:

s1: the polycaprolactam is sliced, dehydrated, antistatic agent and defoamer are stirred and mixed uniformly according to the proportion to obtain a mixture;

s2: melt spinning the mixture to obtain coarse filaments;

s3: oiling the coarse silk with auxiliary oiling agent, and drying;

the auxiliary oiling agent comprises the following components in parts by weight:

by adopting the technical scheme, after the crude silk after extrusion molding is oiled by the auxiliary oiling agent, a layer of functional coating can be formed on the surface of the crude silk, and the layer of functional coating can improve the smoothness of the silk on one hand, and can play a better role in protecting the silk on the other hand, and has certain promotion on the antistatic ability and corrosion resistance of the silk.

Preferably, 3-6 parts by weight of microcapsules are also added into the auxiliary oil, the wall material of the microcapsules adopts polyvinyl alcohol, and the core material adopts butyl stearate.

Through adopting above-mentioned technical scheme, microcapsule evenly disperses in auxiliary oil, and auxiliary oil coats on the silk thread surface, and when the silk thread was handled, the core butyl stearate in the microcapsule had the effect of absorbing and releasing energy through the phase transition to make the temperature of silk thread after the heat treatment not decline too fast, avoid the temperature decline too fast and make silk thread toughness variation, and avoid the friction static phenomenon that the toughness variation arouses to produce.

Preferably, other auxiliary agents are further added into the core material of the microcapsule, and the other auxiliary agents are selected from one or more of sweet wormwood oil, rose essence and lavender essence.

Through adopting above-mentioned technical scheme, after doping entering sweet wormwood oil, rose essence, lavender essence in the microcapsule for the silk thread can make the cloth possess certain functionality after weaving into the cloth, sweet wormwood oil has the antibiotic mosquito repellent effect of improvement cloth, and rose essence, lavender essence can also improve the fragrant smell of cloth, and can not make rose essence, lavender essence dispel fast owing to the slow-release effect, can remain for a longer time.

In summary, the present application has the following beneficial effects:

1. the porous carbon nano tube and the high-molecular antistatic agent are mixed to serve as raw materials of the silk thread, and the migration of the antistatic effective components is reduced and the antistatic durability of the silk thread is improved through the adsorption effect of the porous carbon nano tube.

2. In the application, the pretreatment and the modification treatment are preferably performed on the porous carbon nanotubes, so that the adsorption effect of the porous carbon nanotubes on the high-molecular antistatic agent and the dispersion capability of the porous carbon nanotubes are improved, and the antistatic performance and the durability of the antistatic capability of the silk thread are improved.

3. In the method for preparing the silk thread, the functionality of the silk thread and the lubricating property of the silk thread are improved by adding the auxiliary oil agent and the microcapsule.

Detailed Description

The present application is described in further detail below with reference to examples.

The starting materials used in the examples are all commercially available. Wherein, the water scavenger adopts ALT-201 which is produced by Anxiang Ailiter chemical industry Co., ltd, and the defoamer adopts polydimethylsiloxane. The amounts of the raw materials used in the examples are shown in Table 2.

In the following examples, except for the specific descriptions, the carbon nanotubes were selected to have a length of 100-1000nm and a tube diameter of 5-20nm.

Preparation of raw materials

Preparation example 1

As shown in Table 1, the main difference between preparation examples 1 to 3 is the raw material ratio of the auxiliary oil agent. Wherein, except for special description, the microcapsule adopts wall material as polyvinyl alcohol and butyl stearate as core material.

In the following, preparation example 1 is described, in which dimethyl propane carboxylic acid ester is used as the dicarboxylic acid ester, polyoxyethylene laurate is used as the fatty acid polyoxyethylene ester, and octadecyl sulfate is used as the alkyl sulfate.

The preparation method of the auxiliary oil provided in preparation example 1 is as follows:

the dicarboxylic acid ester, the fatty acid polyoxyethylene ester, the alkyl sulfate and the polyisobutylene bissuccinimide are stirred and mixed for 20min according to the proportion shown in the table 1 at the stirring speed of 100r/min, so that the auxiliary oiling agent is obtained.

TABLE 1 content of the components in the auxiliary oil

Preparation example 4

Unlike in preparation example 3, microcapsules were added to the raw material of preparation example 4.

Preparation example 5

Unlike in preparation example 3, the amount of microcapsules used was increased.

Preparation example 6

Unlike in preparation example 3, the amount of microcapsules was increased and was larger than that of preparation example 5.

Preparation example 7

Unlike in preparation example 6, 5% of sweet wormwood oil by mass of butyl stearate was also added to the core material of the microcapsule.

Preparation example 8

Unlike in preparation example 6, 2% of sweet wormwood oil and 3% of rose essence by mass of butyl stearate were also added to the core material of the microcapsule.

Preparation example 9

Unlike in preparation example 6, rose essence 2% by mass of butyl stearate and lavender essence 3% by mass of butyl stearate were also added to the core material of the microcapsule.

Preparation example 10

Unlike in preparation example 6, rose essence 1% by mass of butyl stearate, lavender essence 2% by mass of butyl stearate, and lavender essence 3% by mass of butyl stearate were also added to the core material of the microcapsule.

PREPARATION EXAMPLE 11

The porous carbon nanotubes are pretreated by the following steps:

step 1: adding the porous carbon nano tube into mixed acid formed by mixing concentrated nitric acid and concentrated sulfuric acid according to the mass ratio of 1:1, wherein the ratio of the porous carbon nano tube to the mixed acid is 1:10, carrying out ultrasonic treatment for 40min, and filtering to obtain a crude pretreated porous carbon nano tube;

step 2: rinsing the crude pretreated porous carbon nanotube with deionized water until the eluent is neutral, and drying the porous carbon nanotube at 50 ℃ for 1h to obtain the pretreated porous carbon nanotube.

Preparation example 12

Unlike preparation example 11, the pretreated porous carbon nanotubes were subjected to a modification treatment comprising the steps of:

step 1: and (3) performing polypyrrole grafting reaction on the pretreated porous carbon nanotube, and taking pyrrole, silver nitrate and the pretreated carbon nanotube for later use according to the weight ratio of 1:1:5. And then mixing sodium dodecyl benzene sulfonate, dimethylbenzene and deionized water according to the weight ratio of 2:1:50, wherein the stirring speed is 100r/min, and the stirring time is 10min to obtain a stirring liquid. Then adding the pretreated carbon nano tube into the stirring liquid, performing ultrasonic dispersion for 30min, and placing the mixture in an ice-water bath for 0.5h. Pyrrole and silver nitrate were then added and stirred at a stirring speed of 50r/min for 24h. Washing the mixture after the reaction with ethanol and deionized water for three times in sequence to obtain the porous carbon nanotube grafted with polypyrrole;

step 2: carrying out coordination reaction on the polypyrrole grafted porous carbon nano tube by using organic acid; firstly, mixing N-methyl pyrrolidone and erucic acid in a mass ratio of 10:1 for 30min at a stirring speed of 100r/min to obtain coordination liquid. And then stirring the polypyrrole grafted porous carbon nano tube and the coordination liquid at the stirring speed of 50r/min for 24 hours at the room temperature according to the weight ratio of 1:10. And finally, washing the mixture obtained by filtering with N-methyl pyrrolidone, acetone and deionized water for three times respectively, and drying the mixture in a vacuum oven at 60 ℃ for 24 hours after washing is finished to obtain the modified porous carbon nanotube.

Preparation example 13

Unlike in preparation example 12, erucic acid in modification treatment step 2 was replaced with phthalic acid.

Examples

Examples 1 to 14

As shown in Table 2, the main difference between examples 1 to 14 is the difference in the raw material ratio of the antistatic DTY yarn.

The following description will take example 1 as an example, wherein Xin Guichun polyoxyethylene ether potassium phosphate is used as the isomeric polyoxyethylene ether potassium phosphate, and tridecanol polyoxyethylene ether potassium phosphate is used as the isomeric polyoxyethylene ether potassium phosphate.

The preparation method of the antistatic DTY yarn provided in example 1 is as follows:

s1: slicing polycaprolactam, removing water agent, antistatic agent and defoaming agent according to a certain proportion, stirring and mixing for 20min at a stirring speed of 150r/min to obtain a mixture;

s2: putting the obtained mixture into a screw extruder, and carrying out melting treatment through four processing areas, wherein the first processing area is a heating area, and the temperature is 240 ℃; the second processing area is a heat-preserving pressurizing area, the temperature is 210 ℃, and the pressure is 1100N; the third processing area is a heating area, and the temperature is 250 ℃; the fourth processing area is a heat-preserving pressurizing area, the temperature is 220 ℃, and the pressure is 1200N, so that the raw materials are in a molten state. The melted raw materials enter a spinning box body after passing through a filter, are extruded from pores of a spinneret plate, and are cooled by air to obtain coarse filaments;

s3: the coarse yarn is oiled by an oiling roller, and the oiled yarn is wound on a bobbin firstly, and then is wound on the bobbin by a hot roller with the temperature of 50 ℃ to obtain the antistatic DTY yarn. The oiling agent used is the auxiliary oiling agent prepared in preparation example 1.

TABLE 2 antistatic DTY filament raw materials

Example 15

Unlike example 9, the porous carbon nanotube pretreated in preparation example 11 was used.

Example 16

Unlike example 9, the modified porous carbon nanotube of preparation example 12 was used as the porous carbon nanotube.

Example 17

Unlike example 9, the modified porous carbon nanotube of preparation example 13 was used as the porous carbon nanotube.

Example 18

Unlike example 9, the auxiliary oil in preparation example 2 was used.

Example 19

Unlike example 9, the auxiliary oil in preparation example 3 was used.

Example 20

Unlike example 9, the auxiliary oil in preparation example 4 was used.

Example 21

Unlike example 9, the auxiliary oil in preparation example 5 was used.

Example 22

Unlike example 9, the auxiliary oil in preparation example 6 was used.

Example 23

Unlike example 9, the auxiliary oil in preparation example 7 was used.

Example 24

Unlike example 9, the auxiliary oil in preparation example 8 was used.

Example 25

Unlike example 9, the auxiliary oil in preparation example 9 was used.

Example 26

Unlike example 9, the auxiliary oil in preparation example 10 was used.

Example 27

Unlike example 9, the tube diameter of the porous carbon nanotube was 1200-1500nm.

Example 28

Unlike example 9, the tube diameter of the porous carbon nanotube was 50-80nm.

Example 29

Unlike example 9, the tube diameter of the porous carbon nanotube was 30 to 40nm.

Example 30

Unlike example 9, the tube diameter of the porous carbon nanotube was 2 to 3nm.

Comparative example

Comparative example 1

Unlike example 9, the porous carbon nanotubes in the antistatic agent were replaced with carbon nanotubes.

Comparative example 2

In contrast to example 9, the antistatic agent was MOA-9PK antistatic agent, model number, manufactured by sea Ann petrochemical industry, jiangsu province.

Performance test

Antistatic detection

Sample treatment: the sample is rinsed with deionized water for 300 times, the rinsing time is 5 minutes each time, and the sample is dried for 0.5 hour in an oven with the temperature of 50 ℃ after the rinsing is finished, and the sample is dried for standby.

The detection method is measured according to FZ/T50035-2016 synthetic fiber filament resistance test method. And (3) taking a section of fiber with the length of 100mm, adhering conductive adhesive on two ends of the fiber, testing the resistance value of the fiber at the interval of 100mm by adopting an EST121 type digital ultra-high resistance microcurrent meter, measuring the voltage of (100+/-5) V, taking an average value for 5 times, and calculating the volume specific resistance of the fiber.

TABLE 3 antistatic test results

Coefficient of friction test

The coefficient of friction was measured using a Changzhou second textile mill Y151 yarn coefficient of friction tester. The test speed of the friction coefficient tester is set to be 30 revolutions per minute, the wrap angle is 180 degrees, and the dynamic friction coefficient of the fiber is tested.

The method for measuring the dynamic friction coefficient is as follows:

and (3) taking the stainless steel roller as a roller core, and manufacturing the fiber sample in the step (2) into a fiber roller to finish the work to be detected.

And (3) starting the friction coefficient instrument, enabling the fiber roller to rotate at the speed of 30 revolutions per minute, slowly rotating the balance handle until the torsion balance pointer returns to a zero position or enabling the torsion balance pointer to swing at two sides of the center of the balance point in a constant amplitude manner, and recording the readings on the torsion balance at the moment. Each fiber was thus repeated 3 times and the average value was recorded. Each fiber rod measures 6 fibers to obtain friction force values between the 6 fibers and the fibers on the surface of the fiber roller. Five fiber rolls were measured and an average lookup table was determined.

TABLE 4 dynamic friction coefficient test results

Examples	Coefficient of dynamic friction
		Example 9	0.451
Example 16	0.241
		Example 17	0.457
Example 19	0.342
		Example 20	0.287
Example 21	0.223
		Example 22	0.212
Example 23	0.231
		Example 24	0.221
Example 25	0.226
		Comparative example 1	0.513
Comparative example 2	0.467

It can be seen in combination with examples 1-14 and with Table 3 that the amount of antistatic agent component affects the final antistatic ability of the yarn, and that the antistatic ability and antistatic durability of the yarn are best when the amount of antistatic agent is formulated in the formulation of example 9.

It can be seen from the combination of examples 9, 15, 16, 17 and Table 3 that the component porous carbon nanotubes in the antistatic agent had a certain effect on the improvement of the antistatic ability of the yarn after the pretreatment and the modification treatment.

It can be seen from the combination of examples 1 to 26 and comparative examples 1 to 2 and the combination of Table 3 that the antistatic agent used in the present application has better durability and the porous carbon nanotube has a larger influence on the durability of the antistatic agent.

It can be seen from the combination of examples 9, 27-30 and table 3 that the length and the tube diameter of the porous carbon nanotubes have a certain effect on the dispersion of the porous carbon nanotubes in the matrix, and that too long or too short length of the carbon nanotubes and too thick or too thin tube diameter can cause the porous carbon nanotubes to form a conductive effect of conductive network paths in the matrix.

It can be seen from the combination of examples 9, 16 and 17 and the combination of table 4 that the use of erucic acid modification in the process of modifying the porous carbon nanotubes can improve the dispersion properties of the porous carbon nanotubes and also the lubrication properties of the filaments, whereas the general organic acids, such as phthalic acid, can only improve the dispersion properties of the porous carbon nanotubes.

It can be seen from the combination of examples 9, 19 to 25 and comparative examples 1 to 2 and table 4 that the lubricating properties of the filaments can be improved to a certain extent by adding microcapsules in the auxiliary oil, and the possible principle is that the phase change of the microcapsules makes the temperature change of the filaments more gentle when the filaments are cooled by extrusion, so that the filaments are softer and smoother.

The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.

Claims

1. The antistatic DTY yarn is characterized by comprising the following raw materials in parts by weight:

100-120 parts of polycaprolactam slice;

3-5 parts of a water scavenger;

0.5-2 parts of antistatic agent;

0.3-0.4 part of defoaming agent;

30-40% of high-carbon alcohol polyoxyethylene ether phosphate potassium salt;

20-30% of isomeric alcohol polyoxyethylene ether phosphate potassium salt;

30-45% of porous carbon nano tube;

the preparation method comprises the steps of pre-treating the porous carbon nanotube before the porous carbon nanotube is used as a raw material to prepare an antistatic DTY wire, and then modifying the porous carbon nanotube after the pre-treatment is finished, wherein the pre-treatment comprises the following steps:

step 1: adding the porous carbon nano tube into mixed acid formed by mixing concentrated nitric acid and concentrated sulfuric acid in a mass ratio of 1:1, wherein the ratio of the porous carbon nano tube to the mixed acid is 1:10, carrying out ultrasonic treatment for 40min, and filtering to obtain a crude pretreated porous carbon nano tube;

step 2: rinsing the crude pretreated porous carbon nanotube with deionized water until eluent is neutral, and drying the porous carbon nanotube at 50 ℃ for 1h to obtain the pretreated porous carbon nanotube;

the modification treatment comprises the following steps:

step 1: performing polypyrrole grafting reaction on the pretreated porous carbon nanotube, and firstly taking pyrrole, silver nitrate and the pretreated carbon nanotube according to the weight ratio of 1:1:5 for standby; mixing sodium dodecyl benzene sulfonate, dimethylbenzene and deionized water according to the weight ratio of 2:1:50, and stirring at the stirring speed of 100r/min for 10min to obtain a stirring solution; then adding the pretreated carbon nano tube into the stirring liquid, performing ultrasonic dispersion for 30min, and then placing the carbon nano tube in an ice-water bath for 0.5h; then adding pyrrole and silver nitrate, and stirring for 24 hours at a stirring speed of 50 r/min; washing the mixture after the reaction with ethanol and deionized water for three times in sequence to obtain the porous carbon nanotube grafted by polypyrrole;

step 2: carrying out coordination reaction on the polypyrrole grafted porous carbon nano tube by using organic acid; firstly, stirring and mixing N-methyl pyrrolidone and erucic acid in a mass ratio of 10:1 for 30min at a stirring speed of 100r/min to obtain a coordination solution; then stirring the porous carbon nano tube grafted by polypyrrole and the coordination liquid at the stirring speed of 50r/min for reaction for 24 hours at room temperature according to the weight ratio of 1:10; and finally, washing the mixture obtained by filtering with N-methyl pyrrolidone, acetone and deionized water for three times respectively, and drying the mixture in a vacuum oven at 60 ℃ for 24 hours after washing is finished to obtain the modified porous carbon nanotube.

2. An antistatic DTY filament according to claim 1, wherein: the length of the porous carbon nano tube is selected to be 100-1000nm, and the tube diameter is 5-20nm.

3. An antistatic DTY filament according to claim 1, wherein: the organic acid adopted in the modification process of the porous carbon nano tube is selected from erucic acid.

4. A process for preparing an antistatic DTY yarn as claimed in any one of claims 1 to 3, characterized in that: the method comprises the following steps:

s2: melt spinning the mixture to obtain coarse filaments;

s3: oiling the coarse silk with auxiliary oiling agent, and drying;

10-20 parts of dicarboxylic acid ester;

30-40 parts of fatty acid polyoxyethylene ester;

10-20 parts of alkyl sulfate;

10-12 parts of polyisobutylene bissuccinimide.

5. The process for preparing the antistatic DTY yarn according to claim 4, wherein: the auxiliary oil agent is also added with 3-6 parts by weight of microcapsules, wherein the wall material of the microcapsules adopts polyvinyl alcohol, and the core material adopts butyl stearate.

6. The process for preparing the antistatic DTY yarn according to claim 5, wherein: other auxiliary agents are also added into the core material of the microcapsule, and the other auxiliary agents are selected from one or more of sweet wormwood oil, rose essence and lavender essence.