阅读说明：本技术 一种煤矿工业用阻燃抗静电面料及其制备方法 (Flame-retardant antistatic fabric for coal mine industry and preparation method thereof ) 是由 张东 于 2019-10-23 设计创作，主要内容包括：本发明涉及一种煤矿工业用阻燃抗静电面料及其制备方法,属于面料制备技术领域。本发明首先以聚丙烯为原料,将其加热熔融,并向聚丙烯熔融液中加入聚磷酸铵和甘油,混合后经熔融喷丝装置喷丝制备得到阻燃改性聚丙烯纤维,接着本发明将棉纤维用植酸溶液超声振荡浸渍处理后,再放入硝酸银溶液中浸渍活化,再将活化后的棉纤维在丙烯氛围下热处理,制得改性棉纤维,最终将阻燃改性聚丙烯纤维和改性棉纤维混纺后即得煤矿工业用阻燃抗静电面料,本发明制得的煤矿工业用阻燃抗静电面料的阻燃性高,抗静电能力强,具有广阔的使用前景。(The invention relates to a flame-retardant antistatic fabric for coal mine industry and a preparation method thereof, and belongs to the technical field of fabric preparation. The invention firstly uses polypropylene as raw material, heats and melts the polypropylene, adds ammonium polyphosphate and glycerol into polypropylene melt, mixes and sprays by a melting and spraying device to prepare the flame-retardant modified polypropylene fiber, then the invention uses phytic acid solution to carry out ultrasonic oscillation dipping treatment on cotton fiber, then puts the cotton fiber into silver nitrate solution to carry out dipping activation, then carries out heat treatment on the activated cotton fiber under propylene atmosphere to prepare modified cotton fiber, and finally blends the flame-retardant modified polypropylene fiber and the modified cotton fiber to obtain the flame-retardant antistatic fabric for coal mine industry.)

1. The flame-retardant antistatic fabric for the coal mine industry is characterized in that: comprises flame-retardant modified polypropylene fiber and modified cotton fiber.

2. The flame-retardant antistatic fabric for the coal mine industry according to claim 1, which is characterized in that: the flame-retardant modified polypropylene fiber comprises 30-40 parts by weight of flame-retardant modified polypropylene fiber and 60-70 parts by weight of modified cotton fiber.

3. The flame-retardant antistatic fabric for the coal mine industry according to claim 1 or 2, which is characterized in that: the flame-retardant modified polypropylene fiber is prepared from polypropylene, nitrogen, ammonium polyphosphate and glycerol.

4. The flame-retardant antistatic fabric for the coal mine industry according to claim 1 or 2, which is characterized in that: the modified cotton fiber is prepared from cotton fiber, phytic acid solution, silver nitrate solution and propylene.

5. A preparation method of a flame-retardant antistatic fabric for coal mine industry is characterized by comprising the following specific preparation steps:

(1) preparing flame-retardant modified polypropylene fibers;

(2) preparing modified cotton fibers;

(3) and (3) preparing the flame-retardant antistatic fabric for the coal mine industry.

6. The preparation method of the flame-retardant antistatic fabric for the coal mine industry according to claim 5, which is characterized by comprising the following specific preparation steps:

(1) preparing the flame-retardant modified polypropylene fiber:

weighing polypropylene, putting the polypropylene into a reaction kettle, heating to raise the temperature, melting the polypropylene under the protection of nitrogen, sequentially adding ammonium polyphosphate and glycerol into the reaction kettle after melting, and continuously preserving heat, mixing and stirring to obtain a prefabricated polypropylene melt;

pouring the obtained prefabricated polypropylene molten liquid into a metal screen for filtering, separating and removing filter residues to obtain filtrate, filling the filtrate into a melt spinning device, extruding and molding the filtrate through spinning holes, naturally cooling to room temperature, and drying to obtain flame-retardant modified polypropylene fibers for later use;

(2) preparing modified cotton fibers:

mixing cotton fibers and a phytic acid solution, putting the mixture into an ultrasonic oscillator, carrying out ultrasonic oscillation dipping, and taking out the mixture after dipping to obtain pre-modified cotton fibers;

immersing the pre-modified cotton fiber into a silver nitrate solution, standing, immersing, taking out to obtain an activated cotton fiber, hanging the activated cotton fiber in a carbonization furnace, heating the carbonization furnace under the atmosphere of propylene gas, carrying out heat preservation reaction, and taking out to obtain a modified cotton fiber;

(3) preparing the flame-retardant antistatic fabric for the coal mine industry:

and weighing the flame-retardant modified polypropylene fiber and the modified cotton fiber, alternately arranging one path of the flame-retardant modified polypropylene fiber and one path of the modified cotton fiber with each path of weft yarn, and weaving to obtain the flame-retardant antistatic fabric for the coal mine industry.

7. The preparation method of the flame-retardant antistatic fabric for the coal mine industry according to claim 5, which is characterized by comprising the following specific preparation steps:

(1) preparing the flame-retardant modified polypropylene fiber:

weighing polypropylene, putting the polypropylene into a reaction kettle, heating to 150-180 ℃, melting for 40-50 min under the protection of nitrogen, sequentially adding ammonium polyphosphate accounting for 8-10% of the mass of the polypropylene and glycerol accounting for 10-15% of the mass of the polypropylene into the reaction kettle after melting, and continuously keeping the temperature, mixing and stirring for 1-2 h to obtain a prefabricated polypropylene melt;

pouring the obtained prefabricated polypropylene molten liquid into a metal screen mesh for filtering, separating and removing filter residues to obtain filtrate, filling the filtrate into a melt spinning device, extruding and molding the filtrate through spinning holes under the action of screw pressure of 0.5-0.7 MPa, naturally cooling to room temperature, and drying to obtain flame-retardant modified polypropylene fibers for later use;

(2) preparing modified cotton fibers:

mixing the cotton fibers with a phytic acid solution with the mass fraction of 60% according to the mass ratio of 1:10, putting the mixture into an ultrasonic oscillator, carrying out ultrasonic oscillation dipping for 10-12 h under the condition that the ultrasonic frequency is 30-40 kHz, and taking out the mixture after dipping to obtain pre-modified cotton fibers;

immersing the pre-modified cotton fiber into a silver nitrate solution with the mass fraction of 20%, standing and immersing for 1-2 h, taking out to obtain activated cotton fiber, hanging the activated cotton fiber in a carbonization furnace, heating the carbonization furnace to 200-300 ℃ under the atmosphere of propylene gas, carrying out heat preservation reaction for 4-5 h, and taking out to obtain modified cotton fiber;

(3) preparing the flame-retardant antistatic fabric for the coal mine industry:

weighing 30-40 parts by weight of standby flame-retardant modified polypropylene fiber and 60-70 parts by weight of modified cotton fiber, and alternately arranging one path of flame-retardant modified polypropylene fiber and one path of modified cotton fiber for each path of weft yarn, wherein the feeding length of each yarn is as follows: and weaving the flame-retardant modified polypropylene fiber with the thickness of 260-300 mm/100N and the modified cotton fiber with the thickness of 280-300 mm/100N to obtain the flame-retardant antistatic fabric for the coal mine industry.

Technical Field

The invention relates to a flame-retardant antistatic fabric for coal mine industry and a preparation method thereof, and belongs to the technical field of fabric preparation.

Background

Chemical fiber (such as terylene) has the advantages of good wear resistance, stiffness, elasticity, chemical corrosion resistance and the like, and is widely applied to the fields of clothing, decoration, industry and the like.

Compared with natural cotton and other fibers, the chemical fiber has high strength, good cloth cover texture, bright color, proper price and easy processing, and is deeply loved by consumers. However, since the chemical fiber belongs to hydrophobic fiber, and the molecules lack hydrophilic groups, the chemical fiber has poor hygroscopicity, is easy to be pilling, generates static electricity, and is easier to accumulate static electricity in a low-humidity environment, so that the chemical fiber has certain difficulty in each production process of spinning, twisting, weaving, knitting, dyeing, finishing and the like, and even causes quality problems; when the fabric is worn, people feel uncomfortable, and the fabric is easy to absorb dust. Especially in some special fields (such as coal mine worker clothes), the static electricity generated by the chemical fiber clothes can even cause serious accidents, and cause casualties.

Along with the increasing coal yield, the safe production accident situation of the Chinese coal mine is more and more noticed by the people in the world. In recent years, due to the enhancement of awareness of environmental protection, fire protection and safety, fire-retardant materials (clothing) are more and more emphasized, and the fire-retardant property of industrial textiles becomes a hot point of research. In recent years, coal mine accidents happen occasionally, so that the domestic market has a very large demand for mining products. The fireproof hoisting rope, the safety belt, the flame-retardant mining belt core, the fireproof covering cloth and other products, particularly the mining clothes, are very popular in the market. However, the functional requirements of the mining garment fabric on the product are extremely high, so the technical requirements for producing the mining garment fabric are high, the production difficulty is high, many enterprises at home and abroad can 'go ahead' to produce the mining garment fabric, the number of the mining garment fabrics in the market is small, and the price is high.

Therefore, the development of the textile fabric with flame retardant and antistatic functions has very important significance in the technical field of preparation of the mining fabric.

Disclosure of Invention

The invention mainly solves the technical problem, and provides a flame-retardant antistatic fabric for coal mine industry and a preparation method thereof, aiming at the defects that the existing common mine fabric is poor in flame-retardant performance and antistatic performance and is easy to cause coal mine safety accidents.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a flame-retardant antistatic fabric for the coal mine industry comprises flame-retardant modified polypropylene fibers and modified cotton fibers.

The flame-retardant antistatic fabric for the coal mine industry comprises, by weight, 30-40 parts of flame-retardant modified polypropylene fibers and 60-70 parts of modified cotton fibers.

The flame-retardant modified polypropylene fiber is prepared from polypropylene, nitrogen, ammonium polyphosphate and glycerol.

The modified cotton fiber is prepared from cotton fiber, phytic acid solution, silver nitrate solution and propylene.

A preparation method of a flame-retardant antistatic fabric for coal mine industry comprises the following specific preparation steps:

(1) preparing flame-retardant modified polypropylene fibers;

(2) preparing modified cotton fibers;

(3) and (3) preparing the flame-retardant antistatic fabric for the coal mine industry.

A preparation method of a flame-retardant antistatic fabric for coal mine industry comprises the following specific preparation steps:

(1) preparing the flame-retardant modified polypropylene fiber:

weighing polypropylene, putting the polypropylene into a reaction kettle, heating to raise the temperature, melting the polypropylene under the protection of nitrogen, sequentially adding ammonium polyphosphate and glycerol into the reaction kettle after melting, and continuously preserving heat, mixing and stirring to obtain a prefabricated polypropylene melt;

pouring the obtained prefabricated polypropylene melt into a metal screen for filtering, separating and removing filter residues to obtain filtrate, filling the filtrate into a melt spinning device, extruding and molding the filtrate through spinning holes, naturally cooling to room temperature, and drying to obtain flame-retardant modified polypropylene fibers for later use, wherein ammonium polyphosphate and glycerol are added, the ammonium polyphosphate is thermally decomposed to generate phosphoric acid and ammonia gas in the high-temperature combustion and decomposition process, the phosphoric acid and the glycerol are subjected to esterification reaction and dehydration to form carbon, the water vapor and the ammonia gas removed in the reaction enable a fabric carbon layer to expand and foam, the formed porous carbon layer isolates the contact of heat and oxygen with a fabric material, the thermal degradation of the fabric is delayed, meanwhile, the expanded carbon layer can reduce the overflow of combustible gas, and the combustion process is interrupted;

(2) preparing modified cotton fibers:

mixing cotton fibers and a phytic acid solution, putting the mixture into an ultrasonic oscillator, carrying out ultrasonic oscillation dipping, and taking out the mixture after dipping to obtain pre-modified cotton fibers;

soaking the pre-modified cotton fiber in a silver nitrate solution, standing, soaking and taking out to obtain an activated cotton fiber, wherein after the activated cotton fiber is soaked in phytic acid, acid-etched micropores are formed on the surface of the cotton fiber, so that the phytic acid can be firmly attached to the surface of the cotton fiber, the phytic acid has excellent metal ion chelation, when the phytic acid is contacted with the silver nitrate solution, the phytic acid on the surface of the cotton fiber can be chelated and fixed with silver ions, a compact monomolecular protective film is formed on the surface of the cotton fiber, oxygen and the like can be effectively prevented from entering the surface of the cotton fiber, and the surface of the treated cotton fiber has excellent antistatic performance due to a monomolecular hole electron conducting layer; the method comprises the following steps of (1) suspending activated cotton fibers in a carbonization furnace, heating the carbonization furnace in the propylene gas atmosphere to raise the temperature, carrying out heat preservation reaction, taking out the heated activated cotton fibers to obtain modified cotton fibers, wherein in the modification process of the activated cotton fabrics, the propylene gas can deposit carbon nanotubes on the surfaces of the activated cotton fabrics at high temperature, and silver in pores of the activated cotton fibers has catalysis effect on the deposition reaction of the carbon nanotubes, so that the pores of the modified cotton fabrics are deposited to obtain high-density carbon nanotubes;

(3) preparing the flame-retardant antistatic fabric for the coal mine industry:

and weighing the flame-retardant modified polypropylene fiber and the modified cotton fiber, alternately arranging one path of the flame-retardant modified polypropylene fiber and one path of the modified cotton fiber with each path of weft yarn, and weaving to obtain the flame-retardant antistatic fabric for the coal mine industry.

A preparation method of a flame-retardant antistatic fabric for coal mine industry comprises the following specific preparation steps:

(1) preparing the flame-retardant modified polypropylene fiber:

weighing polypropylene, putting the polypropylene into a reaction kettle, heating to 150-180 ℃, melting for 40-50 min under the protection of nitrogen, sequentially adding ammonium polyphosphate accounting for 8-10% of the mass of the polypropylene and glycerol accounting for 10-15% of the mass of the polypropylene into the reaction kettle after melting, and continuously keeping the temperature, mixing and stirring for 1-2 h to obtain a prefabricated polypropylene melt;

pouring the obtained prefabricated polypropylene molten liquid into a metal screen mesh for filtering, separating and removing filter residues to obtain filtrate, filling the filtrate into a melt spinning device, extruding and molding the filtrate through spinning holes under the action of screw pressure of 0.5-0.7 MPa, naturally cooling to room temperature, and drying to obtain flame-retardant modified polypropylene fibers for later use;

(2) preparing modified cotton fibers:

mixing the cotton fibers with a phytic acid solution with the mass fraction of 60% according to the mass ratio of 1:10, putting the mixture into an ultrasonic oscillator, carrying out ultrasonic oscillation dipping for 10-12 h under the condition that the ultrasonic frequency is 30-40 kHz, and taking out the mixture after dipping to obtain pre-modified cotton fibers;

immersing the pre-modified cotton fiber into a silver nitrate solution with the mass fraction of 20%, standing and immersing for 1-2 h, taking out to obtain activated cotton fiber, hanging the activated cotton fiber in a carbonization furnace, heating the carbonization furnace to 200-300 ℃ under the atmosphere of propylene gas, carrying out heat preservation reaction for 4-5 h, and taking out to obtain modified cotton fiber;

(3) preparing the flame-retardant antistatic fabric for the coal mine industry:

weighing 30-40 parts by weight of standby flame-retardant modified polypropylene fiber and 60-70 parts by weight of modified cotton fiber, and alternately arranging one path of flame-retardant modified polypropylene fiber and one path of modified cotton fiber for each path of weft yarn, wherein the feeding length of each yarn is as follows: and weaving the flame-retardant modified polypropylene fiber with the thickness of 260-300 mm/100N and the modified cotton fiber with the thickness of 280-300 mm/100N to obtain the flame-retardant antistatic fabric for the coal mine industry.

The beneficial technical effects of the invention are as follows:

(1) the invention firstly takes polypropylene as a raw material, the polypropylene is heated and melted, ammonium polyphosphate and glycerol are added into polypropylene melt, the polypropylene melt is mixed and spun by a melt spinning device to prepare the flame-retardant modified polypropylene fiber, then the cotton fiber is treated by ultrasonic oscillation and dipping of phytic acid solution, then the cotton fiber is put into silver nitrate solution for dipping and activation, the activated cotton fiber is treated by heat under the atmosphere of propylene to prepare modified cotton fiber, finally the flame-retardant modified polypropylene fiber and the modified cotton fiber are blended to obtain the flame-retardant antistatic fabric for coal mine industry, the flame-retardant modified polypropylene fiber prepared by the invention contains ammonium polyphosphate and glycerol, the ammonium polyphosphate can be decomposed by heat to generate phosphoric acid and ammonia gas in the high-temperature combustion decomposition process, the phosphoric acid and the glycerol are subjected to esterification reaction to dehydrate to form carbon, and the water vapor and the ammonia gas removed in the reaction expand and foam a carbon layer, the formed porous carbon layer isolates the contact of heat and oxygen with the fabric material, the thermal degradation of the fabric is delayed, and meanwhile, the expansion carbon layer can reduce the overflow of combustible gas and interrupt the combustion process, so that the fabric for the coal mine industry has excellent flame retardance;

(2) the modified cotton fiber of the invention has acid-etched micropores on the surface after being soaked by phytic acid, so that the phytic acid can be firmly attached to the surface of the cotton fiber, the phytic acid has excellent chelating property for metal ions, when the phytic acid is contacted with silver nitrate solution, the phytic acid on the surface of the cotton fiber can chelate and fix silver ions, a layer of compact monomolecular protective film is formed on the surface of the cotton fiber, oxygen and the like can be effectively prevented from entering the surface of the cotton fiber, the treated surface of the cotton fiber has excellent antistatic property due to the formed monomolecular hole electron conducting layer, in addition, in the modification process of the activated cotton fabric, propylene gas can deposit carbon nanotubes on the surface of the activated cotton fabric at high temperature, and silver in pores of the activated cotton fiber has catalytic action on the deposition reaction of the carbon nanotubes, so that the pores of the modified cotton fabric are deposited to obtain the high-density carbon nanotubes, the carbon nano tube has a special pipeline structure, a conductive electron capacity and a high specific surface area, so that the antistatic property of the fabric can be further improved, and the fabric has a wide application prospect.

Detailed Description

(1) Preparation of a preformed polypropylene melt:

weighing polypropylene, putting the polypropylene into a reaction kettle, heating to 150-180 ℃, melting for 40-50 min under the protection of nitrogen, sequentially adding ammonium polyphosphate accounting for 8-10% of the mass of the polypropylene and glycerol accounting for 10-15% of the mass of the polypropylene into the reaction kettle after melting, and continuously keeping the temperature, mixing and stirring for 1-2 h to obtain a prefabricated polypropylene melt;

(2) preparing the flame-retardant modified polypropylene fiber:

pouring the obtained prefabricated polypropylene molten liquid into a metal screen mesh for filtering, separating and removing filter residues to obtain filtrate, filling the filtrate into a melt spinning device, extruding and molding the filtrate through spinning holes under the action of screw pressure of 0.5-0.7 MPa, naturally cooling to room temperature, and drying to obtain flame-retardant modified polypropylene fibers for later use;

(3) preparing pre-modified cotton fibers:

mixing the cotton fibers with a phytic acid solution with the mass fraction of 60% according to the mass ratio of 1:10, putting the mixture into an ultrasonic oscillator, carrying out ultrasonic oscillation dipping for 10-12 h under the condition that the ultrasonic frequency is 30-40 kHz, and taking out the mixture after dipping to obtain pre-modified cotton fibers;

(4) preparing modified cotton fibers:

immersing the pre-modified cotton fiber into a silver nitrate solution with the mass fraction of 20%, standing and immersing for 1-2 h, taking out to obtain activated cotton fiber, hanging the activated cotton fiber in a carbonization furnace, heating the carbonization furnace to 200-300 ℃ under the atmosphere of propylene gas, carrying out heat preservation reaction for 4-5 h, and taking out to obtain modified cotton fiber;

(5) preparing the flame-retardant antistatic fabric for the coal mine industry:

weighing 30-40 parts by weight of standby flame-retardant modified polypropylene fiber and 60-70 parts by weight of modified cotton fiber, and alternately arranging one path of flame-retardant modified polypropylene fiber and one path of modified cotton fiber for each path of weft yarn, wherein the feeding length of each yarn is as follows: and weaving the flame-retardant modified polypropylene fiber with the thickness of 260-300 mm/100N and the modified cotton fiber with the thickness of 280-300 mm/100N to obtain the flame-retardant antistatic fabric for the coal mine industry.

Example 1

(1) Preparation of a preformed polypropylene melt:

weighing polypropylene, putting the polypropylene into a reaction kettle, heating to 150 ℃, melting for 40min under the protection of nitrogen, sequentially adding ammonium polyphosphate accounting for 8% of the mass of the polypropylene and glycerol accounting for 10% of the mass of the polypropylene into the reaction kettle after melting, and continuously keeping the temperature, mixing and stirring for 1h to obtain a prefabricated polypropylene melt;

(2) preparing the flame-retardant modified polypropylene fiber:

pouring the obtained prefabricated polypropylene molten liquid into a metal screen mesh for filtering, separating and removing filter residues to obtain filtrate, filling the filtrate into a melt spinning device, extruding and molding the filtrate through spinning holes under the action of 0.5MPa of screw pressure, naturally cooling to room temperature, and drying to obtain flame-retardant modified polypropylene fibers for later use;

(3) preparing pre-modified cotton fibers:

mixing cotton fibers with a phytic acid solution with the mass fraction of 60% according to the mass ratio of 1:10, putting the mixture into an ultrasonic oscillator, carrying out ultrasonic oscillation dipping for 10 hours under the condition that the ultrasonic frequency is 30kHz, and taking out the mixture after the dipping is finished to obtain pre-modified cotton fibers;

(4) preparing modified cotton fibers:

immersing the pre-modified cotton fiber into a silver nitrate solution with the mass fraction of 20%, standing and immersing for 1h, taking out to obtain activated cotton fiber, hanging the activated cotton fiber in a carbonization furnace, heating the carbonization furnace to 200 ℃ under the atmosphere of propylene gas, preserving heat, reacting for 4h, and taking out to obtain modified cotton fiber;

(5) preparing the flame-retardant antistatic fabric for the coal mine industry:

weighing 30 parts by weight of standby flame-retardant modified polypropylene fiber and 60 parts by weight of modified cotton fiber, and alternately arranging one path of flame-retardant modified polypropylene fiber and one path of modified cotton fiber on each path of weft yarn, wherein the feeding length of each yarn is as follows: the flame-retardant modified polypropylene fiber is 260mm/100N, the modified cotton fiber is 280mm/100N, and the flame-retardant antistatic fabric for the coal mine industry is obtained by weaving.

Example 2

(1) Preparation of a preformed polypropylene melt:

weighing polypropylene, putting the polypropylene into a reaction kettle, heating to 165 ℃, melting for 45min under the protection of nitrogen, sequentially adding ammonium polyphosphate accounting for 9% of the mass of the polypropylene and glycerol accounting for 13% of the mass of the polypropylene into the reaction kettle after melting, and continuously keeping the temperature, mixing and stirring for 1h to obtain a prefabricated polypropylene melt;

(2) preparing the flame-retardant modified polypropylene fiber:

pouring the obtained prefabricated polypropylene molten liquid into a metal screen mesh for filtering, separating and removing filter residues to obtain filtrate, filling the filtrate into a melt spinning device, extruding and molding the filtrate through spinning holes under the action of 0.6MPa of screw pressure, naturally cooling to room temperature, and drying to obtain flame-retardant modified polypropylene fibers for later use;

(3) preparing pre-modified cotton fibers:

mixing cotton fibers with 60% phytic acid solution according to the mass ratio of 1:10, putting the mixture into an ultrasonic oscillator, carrying out ultrasonic oscillation dipping for 11 hours under the condition that the ultrasonic frequency is 35kHz, and taking out the mixture after dipping to obtain pre-modified cotton fibers;

(4) preparing modified cotton fibers:

immersing the pre-modified cotton fiber into a silver nitrate solution with the mass fraction of 20%, standing and immersing for 2h, taking out to obtain activated cotton fiber, hanging the activated cotton fiber in a carbonization furnace, heating the carbonization furnace to 250 ℃ under the atmosphere of propylene gas, preserving heat, reacting for 4h, and taking out to obtain modified cotton fiber;

(5) preparing the flame-retardant antistatic fabric for the coal mine industry:

weighing 35 parts by weight of spare flame-retardant modified polypropylene fiber and 65 parts by weight of modified cotton fiber, and alternately arranging one path of flame-retardant modified polypropylene fiber and one path of modified cotton fiber on each path of weft yarn, wherein the feeding length of each yarn is as follows: the flame-retardant modified polypropylene fiber is 280mm/100N, and the modified cotton fiber is 290mm/100N, and the flame-retardant antistatic fabric for the coal mine industry is obtained by weaving.

Example 3

(1) Preparation of a preformed polypropylene melt:

weighing polypropylene, putting the polypropylene into a reaction kettle, heating to 180 ℃, melting for 50min under the protection of nitrogen, sequentially adding ammonium polyphosphate accounting for 10% of the mass of the polypropylene and glycerol accounting for 15% of the mass of the polypropylene into the reaction kettle after melting, and continuously keeping the temperature, mixing and stirring for 2h to obtain a prefabricated polypropylene melt;

(2) preparing the flame-retardant modified polypropylene fiber:

pouring the obtained prefabricated polypropylene molten liquid into a metal screen mesh for filtering, separating and removing filter residues to obtain filtrate, filling the filtrate into a melt spinning device, extruding and molding the filtrate through spinning holes under the action of 0.7MPa of screw pressure, naturally cooling to room temperature, and drying to obtain flame-retardant modified polypropylene fibers for later use;

(3) preparing pre-modified cotton fibers:

mixing cotton fibers with 60% phytic acid solution according to the mass ratio of 1:10, putting the mixture into an ultrasonic oscillator, carrying out ultrasonic oscillation dipping for 12 hours under the condition that the ultrasonic frequency is 40kHz, and taking out the mixture after dipping to obtain pre-modified cotton fibers;

(4) preparing modified cotton fibers:

immersing the pre-modified cotton fiber into a silver nitrate solution with the mass fraction of 20%, standing and immersing for 2h, taking out to obtain activated cotton fiber, hanging the activated cotton fiber in a carbonization furnace, heating the carbonization furnace to 300 ℃ under the atmosphere of propylene gas, preserving heat, reacting for 5h, and taking out to obtain modified cotton fiber;

(5) preparing the flame-retardant antistatic fabric for the coal mine industry:

weighing 40 parts by weight of spare flame-retardant modified polypropylene fiber and 70 parts by weight of modified cotton fiber, and alternately arranging one path of flame-retardant modified polypropylene fiber and one path of modified cotton fiber on each path of weft yarn, wherein the feeding length of each yarn is as follows: the flame-retardant modified polypropylene fiber is 300mm/100N, the modified cotton fiber is 300mm/100N, and the flame-retardant antistatic fabric for the coal mine industry is obtained by weaving.

Comparative example 1: the preparation method is the same as that of comparative document 1 of the present invention except that a general polypropylene fiber is used in place of the flame-retardant modified polypropylene fiber of the present invention;

comparative example 2: the preparation method is the same as that of comparative document 1 of the present invention except that the modified cotton fiber of the present invention is replaced with a common cotton fiber;

the flame-retardant and antistatic fabric for the coal mine industry prepared by the method and the flame-retardant and antistatic fabric for the coal mine industry in the comparative example are respectively detected, and the detection results are shown in table 1: 1. test method

The combustion performance test is carried out according to the regulation of GB/T2408-2008.

The horizontal burning test was carried out according to the regulations of GB 2408-80.

The vertical burn test was tested as specified in GB 2409-84.

The resistance test is carried out by adopting a surface resistance tester.

TABLE 1

According to the data in table 1, it can be seen that the flame retardant property of the flame retardant modified polypropylene fiber is obviously improved by adding the flame retardant modified polypropylene fiber in the comparative example 1 because the common polypropylene fiber is used for replacing the flame retardant modified polypropylene fiber, the horizontal burning length is increased and the vertical burning time is prolonged, and the flame retardant property of the flame retardant modified polypropylene fiber is obviously reduced, and the flame retardant property of the flame retardant modified polypropylene fiber in the comparative example 2 is obviously improved by using the common cotton fiber for replacing the modified cotton fiber in the invention, the electrical conductivity is reduced, and the antistatic property is reduced, so that the antistatic property of the flame retardant antistatic fabric is really improved after the modified cotton fiber is added, and therefore, the flame retardant antistatic fabric for coal mine industry prepared by the invention has high flame retardant property, strong antistatic property.