Flame-retardant wear-resistant conductive fabric and preparation method thereof

Abstract

The invention discloses a flame-retardant and wear-resistant conductive fabric and a preparation method thereof.The flame-retardant and wear-resistant conductive fabric is prepared by mixing a polyester melt and a modified filler, carrying out melt spinning and finally interweaving warp and weft yarns, the conductive fabric contains the modified filler, and the modified filler takes a carbon nanotube and carbon black composite material as a conductive framework and takes a carbon nanotube and carbon black composite material as a carbon black composite material; the framework is perfectly grafted and reinforced by pyrrole through in-situ polymerization, a low-resistance, complete and deformation-resistant three-dimensional conductive network is cooperatively constructed in the conductive fabric, so that the conductive fabric has a conductive effect, when the conductive fabric is burnt, organophosphorus on a side chain of a polyester molecule can be decomposed when being heated to generate polyphosphoric acid, and the polyphosphoric acid and a polyester base material are subjected to esterification reaction; the flame-retardant conductive fabric has the advantages that the flame-retardant conductive fabric is added into the conductive fabric, dehydration and crosslinking are catalyzed, a compact, porous and firm carbon layer is formed, the thermal stability, compactness and strength of the carbon layer can be improved through internal boron, nitrogen and silicon elements, the conductive fabric is not prone to disintegration at high temperature and higher in flame-retardant durability, and the wear-resistant effect of the conductive fabric can be improved through internal boric acid ester and imine structures.

Description

Technical Field

[0001] This invention relates to the field of conductive cloth preparation technology, specifically to a flame-retardant and wear-resistant conductive cloth and its preparation method. Background Technology

[0002] Polyester fiber, as the world's largest-produced synthetic fiber, has become an indispensable basic material in the textile industry due to its excellent mechanical strength, chemical resistance, resilience, and cost advantages. However, standard polyester fiber has two inherent drawbacks: first, its limiting oxygen index is only about 20-21%, making it a flammable material. When burned, it produces molten droplets and releases large amounts of smoke and toxic gases, posing a serious fire hazard; second, as a polymer insulator, it has extremely high volume resistivity and is prone to accumulating static charge. In applications such as the electronics industry, medical field, defense, and special protection, it may cause risks such as electrostatic discharge, electromagnetic interference, signal distortion, and even explosions. Therefore, developing multifunctional polyester fabrics that combine highly efficient flame retardancy with long-lasting and stable conductivity has become an important and urgent technical challenge in the field of high-end industrial textiles. Summary of the Invention

[0003] The purpose of this invention is to provide a flame-retardant and wear-resistant conductive cloth and its preparation method, which solves the problems of poor flame-retardant effect and excessive smoke generation of current conductive cloths.

[0004] The objective of this invention can be achieved through the following technical solutions:

[0005] A method for preparing a flame-retardant and wear-resistant conductive cloth specifically includes the following steps:

[0006] Step A1: Mix carboxylated carbon nanotubes, γ-aminopropyltriethoxysilane, and DMF, purge with nitrogen, stir and add dicyclohexylcarbodiimide at a speed of 150-200 r / min and a temperature of 70-75℃, and react for 3-5 h to obtain modified carbon nanotubes. Mix modified carbon nanotubes, carbon black, and DMF, purge with nitrogen, stir and add deionized water at a speed of 600-800 r / min and a temperature of 60-70℃, and react for 1-1.5 h to obtain composite filler.

[0007] Step A2: Mix the composite packing material, deionized water, hexadecyltrimethylammonium bromide, acetonitrile and hydrochloric acid solution, stir at 120-150 r / min and 0℃, add pyrrole and ferric chloride aqueous solution, react for 10-15 h, filter to remove filtrate, wash the substrate with water until neutral, and vacuum dry to obtain the modified packing material.

[0008] Step A3: Mix terephthalic acid, modified monomer, ethylene glycol and manganese acetate evenly, and react at 160-180℃ for 2-3 hours. Then add antimony trioxide and react at 230-240℃ and 0.3-0.5MPa for 3-5 hours. Raise the temperature to 280-285℃ and react at 50-80Pa for 20-30 minutes to obtain polyester melt. Mix the polyester melt and modified filler, melt spin, and then interweave the warp and weft yarns to obtain flame-retardant, wear-resistant, and conductive fabric.

[0009] Furthermore, in step A1, the molar ratio of carboxyl groups, γ-aminopropyltriethoxysilane, and dicyclohexylcarbodiimide on the carboxylated carbon nanotubes is 5:1:1.1, and the mass ratio of modified carbon nanotubes to carbon black is 3:1.

[0010] Furthermore, in step A2, the ratio of the composite filler, deionized water, hexadecyltrimethylammonium bromide, acetonitrile, hydrochloric acid solution, pyrrole, and ferric chloride aqueous solution is 1g:200mL:10g:30mL:20mL:0.15g:60mL, the concentration of the hydrochloric acid solution is 0.1mol / L, and the mass fraction of the ferric chloride aqueous solution is 1%.

[0011] Furthermore, in step A3, the ratio of terephthalic acid, modified monomer, and ethylene glycol is 6:1:8; the amount of manganese acetate is 2% of the total mass of terephthalic acid, modified monomer, and ethylene glycol; the amount of antimony trioxide is 2% of the total mass of terephthalic acid, modified monomer, and ethylene glycol; and the mass ratio of polyester melt to modified filler is 10:1-1.5.

[0012] Furthermore, the modified monomer is prepared by the following steps:

[0013] Step B1: Mix octamethylcyclotetrasiloxane, 3-aminopropyldiethoxymethylsilane, tetramethyldisiloxane, tetramethylammonium hydroxide and deionized water, and purge under nitrogen protection. React at 150-200 r / min and 90-95℃ for 3-5 h to obtain pretreated polysiloxane. Mix the pretreated polysiloxane, allyl alcohol, chloroplatinic acid and DMF, and purge under nitrogen protection. React at 200-300 r / min and 80-85℃ for 6-8 h to obtain hydroxylated polysiloxane.

[0014] Step B2: Mix 2,6,7-trioxa-1-phosphabicyclo(2.2.2)octane-4-methanol-1-oxide, epichlorohydrin, boron trifluoride ether, and tetrahydrofuran. React at 200-300 r / min and 60-65℃ for 6-8 hours. Add sodium hydroxide solution and continue the reaction for 3-5 hours to obtain a flame retardant. Mix aniline, the flame retardant, and tetrahydrofuran under nitrogen protection. Stir and add triethylamine at 150-200 r / min and 70-75℃ for 8-10 hours to obtain a modified flame retardant.

[0015] Step B3: Mix 4-formylphenylboronic acid, modified flame retardant, 4A molecular sieve, p-toluenesulfonic acid and tetrahydrofuran, and purge with nitrogen. React at 200-300 r / min and 35-40℃ for 6-8 hours to obtain the modifier. Mix hydroxylated polysiloxane, modifier, triethylamine and xylene, and purge with nitrogen. React at 150-200 r / min and 110-115℃ for 4-6 hours to obtain the modified monomer.

[0016] Furthermore, in step B1, the molar ratio of octamethylcyclotetrasiloxane, 3-aminopropyldiethoxymethylsilane, tetramethyldisiloxane, tetramethylammonium hydroxide, and deionized water is 1 mol:0.2 mol:1 mol:1.5 mol:20 mL, the molar ratio of pretreated polysiloxane and allyl alcohol is 1:2, and the amount of chloroplatinic acid used is 0.01% of the mass of allyl alcohol.

[0017] Furthermore, in step B2, the ratio of 2,6,7-trioxa-1-phosphabicyclo(2.2.2)octane-4-methanol-1-oxide, epichlorohydrin, boron trifluoride ether, and sodium hydroxide solution is 30 mmol:30 mmol:0.9 g:15 mL, the mass fraction of sodium hydroxide solution is 25%, the molar ratio of aniline to flame retardant is 1:2, and the amount of triethylamine used is 1% of the mass of the flame retardant.

[0018] Furthermore, in step B3, the molar ratio of 4-formylphenylboronic acid to the modified flame retardant is 1:1, the amount of 4A molecular sieve is 5% of the mass of the modified flame retardant, the amount of p-toluenesulfonic acid is 1% of the mass of the modified flame retardant, the molar ratio of the amino group on the hydroxylated polysiloxane to the modifier is 1:1, and the amount of triethylamine is 2% of the mass of the modifier.

[0019] The beneficial effects of this invention are as follows: This invention discloses a flame-retardant and wear-resistant conductive fabric using carboxylated carbon nanotubes and γ-aminopropyltriethoxysilane as raw materials. Under the action of dicyclohexylcarbodiimide, the carboxyl groups on the carboxylated carbon nanotubes and the amino groups on the γ-aminopropyltriethoxysilane undergo a dehydration reaction to obtain modified carbon nanotubes. The modified carbon nanotubes are then mixed with carbon black, causing the siloxanes on the modified carbon nanotubes to hydrolyze and graft onto the hydroxyl groups on the surface of the carbon black to obtain a composite filler. The composite filler is then treated with pyrrole to coat the surface with polypyrrole, thus obtaining a modified filler. Terephthalic acid, modified monomers, and ethylene glycol are esterified and condensed to obtain a polyester melt. The polyester melt and modified filler are mixed and melt-spun, and finally interlaced with warp and weft yarns to obtain a flame-retardant and wear-resistant conductive fabric.

[0020] The modified monomer is prepared by ring-opening octamethylcyclotetrasiloxane as a starting material, followed by hydrolysis and condensation with 3-aminopropyldiethoxymethylsilane, and finally end-capping with tetramethyldisiloxane to obtain a pretreated polysiloxane. The pretreated polysiloxane is then reacted with allyl alcohol, causing the Si-H bonds on the pretreated polysiloxane to react with the double bonds on the allyl alcohol, thus obtaining a hydroxylated polysiloxane. Finally, 2,6,7-trioxa-1-phosphabicyclo(2.2.2)octane-4-methanol-1-oxide is reacted with epichlorohydrin to obtain 2,6,7-trioxa-1-phosphabicyclo(2.2.2)octane-4-methanol-1-oxide. The hydroxyl groups on the oxide react with the epoxy groups on epichlorohydrin, and then the mixture is treated with sodium hydroxide solution to form new epoxy groups, thus obtaining a flame retardant. Aniline is reacted with the flame retardant, causing the amino groups on the aniline to react with the epoxy groups on the flame retardant, thus obtaining a modified flame retardant. 4-Formylphenylboronic acid is reacted with the modified flame retardant, causing the borate groups on the 4-formylphenylboronic acid to react with the diol groups on the modified flame retardant, forming a five-membered ring borate ester, thus obtaining a modifier. Hydroxylated polysiloxane is reacted with the modifier, causing the amino groups on the hydroxylated polysiloxane to react with the aldehyde groups on the modifier, thus obtaining a modified monomer.

[0021] This conductive fabric contains modified fillers. The modified fillers use carbon nanotubes and carbon black composite materials as the conductive framework, and pyrrole is perfectly grafted and reinforced into this framework through in-situ polymerization. The two work together to construct a low-resistance, complete and deformation-resistant three-dimensional conductive network in the conductive fabric, giving it a conductive effect. When the conductive fabric burns, the organophosphorus compounds on the side chains of the polyester molecules decompose when heated, generating polyphosphoric acid with strong dehydrating properties. This polyphosphoric acid reacts with the polymer matrix to esterify and catalyze its dehydration and cross-linking, forming a dense, porous and strong carbon layer. The boron, nitrogen and silicon elements inside can improve the thermal stability, density and strength of the carbon layer, making it less prone to disintegration at high temperatures and providing stronger flame retardant durability. At the same time, the borate ester and imine structures inside can increase the wear resistance of the conductive fabric. Detailed Implementation

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1: A method for preparing a flame-retardant and wear-resistant conductive cloth, specifically including the following steps:

[0024] Step A1: Carboxylated carbon nanotubes, γ-aminopropyltriethoxysilane and DMF are mixed, and nitrogen gas is introduced for protection. Under the conditions of 150 r / min and 70℃, dicyclohexylcarbodiimide is added and the reaction is carried out for 3 h to obtain modified carbon nanotubes. Modified carbon nanotubes, carbon black and DMF are mixed, and nitrogen gas is introduced for protection. Under the conditions of 600 r / min and 60℃, deionized water is added and the reaction is carried out for 1 h to obtain composite filler.

[0025] Step A2: Mix the composite packing material, deionized water, hexadecyltrimethylammonium bromide, acetonitrile and hydrochloric acid solution, stir at 120 r / min and 0℃, add pyrrole and ferric chloride aqueous solution, react for 10 h, filter to remove filtrate, wash the substrate with water until neutral, and vacuum dry to obtain the modified packing material.

[0026] Step A3: Terephthalic acid, modified monomer, ethylene glycol and manganese acetate are mixed evenly and reacted at 160°C for 2 hours. Antimony trioxide is added and reacted at 230°C and 0.3 MPa for 3 hours. The temperature is then raised to 280°C and the reaction is carried out at 50 Pa for 20 minutes to obtain polyester melt. The polyester melt and modified filler are mixed and melt-spun, and then the warp and weft yarns are interwoven to obtain flame-retardant, wear-resistant and conductive fabric.

[0027] The molar ratio of carboxyl groups, γ-aminopropyltriethoxysilane, and dicyclohexylcarbodiimide on the carboxylated carbon nanotubes described in step A1 is 5:1:1.1, and the mass ratio of modified carbon nanotubes to carbon black is 3:1.

[0028] The ratio of the composite filler, deionized water, hexadecyltrimethylammonium bromide, acetonitrile, hydrochloric acid solution, pyrrole, and ferric chloride aqueous solution in step A2 is 1g:200mL:10g:30mL:20mL:0.15g:60mL, the concentration of hydrochloric acid solution is 0.1mol / L, and the mass fraction of ferric chloride aqueous solution is 1%.

[0029] In step A3, the ratio of terephthalic acid, modified monomer, and ethylene glycol is 6:1:8; the amount of manganese acetate is 2% of the total mass of terephthalic acid, modified monomer, and ethylene glycol; the amount of antimony trioxide is 2% of the total mass of terephthalic acid, modified monomer, and ethylene glycol; and the mass ratio of polyester melt to modified filler is 10:1.

[0030] The modified monomer is prepared by the following steps:

[0031] Step B1: Octamethylcyclotetrasiloxane, 3-aminopropyldiethoxymethylsilane, tetramethyldisiloxane, tetramethylammonium hydroxide and deionized water are mixed and purged with nitrogen. The mixture is reacted for 3 hours at a speed of 150 r / min and a temperature of 90 °C to obtain pretreated polysiloxane. The pretreated polysiloxane, allyl alcohol, chloroplatinic acid and DMF are mixed and purged with nitrogen. The mixture is reacted for 6 hours at a speed of 200 r / min and a temperature of 80 °C to obtain hydroxylated polysiloxane.

[0032] Step B2: 2,6,7-trioxa-1-phosphabicyclo(2.2.2)octane-4-methanol-1-oxide, epichlorohydrin, boron trifluoride ether, and tetrahydrofuran were mixed and reacted at 200 r / min and 60 °C for 6 h. Sodium hydroxide solution was added and the reaction was continued for 3 h to obtain a flame retardant. Aniline, the flame retardant, and tetrahydrofuran were mixed, and nitrogen gas was introduced for protection. Triethylamine was added and the mixture was stirred at 150 r / min and 70 °C for 8 h to obtain a modified flame retardant.

[0033] Step B3: Mix 4-formylphenylboronic acid, modified flame retardant, 4A molecular sieve, p-toluenesulfonic acid and tetrahydrofuran, and purge with nitrogen. React at 200 r / min and 35°C for 6 h to obtain the modifier. Mix hydroxylated polysiloxane, modifier, triethylamine and xylene, and purge with nitrogen. React at 150 r / min and 110°C for 4 h to obtain the modified monomer.

[0034] In step B1, the molar ratio of octamethylcyclotetrasiloxane, 3-aminopropyldiethoxymethylsilane, tetramethyldisiloxane, tetramethylammonium hydroxide, and deionized water is 1 mol:0.2 mol:1 mol:1.5 mol:20 mL, the molar ratio of pretreated polysiloxane and allyl alcohol is 1:2, and the amount of chloroplatinic acid used is 0.01% of the mass of allyl alcohol.

[0035] In step B2, the ratio of 2,6,7-trioxa-1-phosphabicyclo(2.2.2)octane-4-methanol-1-oxide, epichlorohydrin, boron trifluoride ether, and sodium hydroxide solution is 30 mmol:30 mmol:0.9 g:15 mL, the mass fraction of sodium hydroxide solution is 25%, the molar ratio of aniline to flame retardant is 1:2, and the amount of triethylamine used is 1% of the mass of flame retardant.

[0036] In step B3, the molar ratio of 4-formylphenylboronic acid to the modified flame retardant is 1:1, the amount of 4A molecular sieve is 5% of the mass of the modified flame retardant, the amount of p-toluenesulfonic acid is 1% of the mass of the modified flame retardant, the molar ratio of the amino group on the hydroxylated polysiloxane to the modifier is 1:1, and the amount of triethylamine is 2% of the mass of the modifier.

[0037] Example 2, a method for preparing a flame-retardant and wear-resistant conductive cloth, specifically includes the following steps:

[0038] Step A1: Carboxylated carbon nanotubes, γ-aminopropyltriethoxysilane, and DMF were mixed and protected with nitrogen. Under the conditions of 150 r / min and 75°C, dicyclohexylcarbodiimide was added and the mixture was stirred for 4 h to obtain modified carbon nanotubes. Modified carbon nanotubes, carbon black, and DMF were mixed and protected with nitrogen. Under the conditions of 600 r / min and 65°C, deionized water was added and the mixture was stirred for 1.3 h to obtain composite filler.

[0039] Step A2: Mix the composite packing material, deionized water, hexadecyltrimethylammonium bromide, acetonitrile and hydrochloric acid solution, stir at 120 r / min and 0℃, add pyrrole and ferric chloride aqueous solution, react for 15 h, filter to remove filtrate, wash the substrate with water until neutral, and vacuum dry to obtain the modified packing material.

[0040] Step A3: Terephthalic acid, modified monomer, ethylene glycol and manganese acetate are mixed evenly and reacted at 170°C for 3 hours. Antimony trioxide is added and reacted at 235°C and 0.4 MPa for 4 hours. The temperature is then raised to 285°C and the reaction is carried out at 65 Pa for 25 minutes to obtain polyester melt. The polyester melt and modified filler are mixed and melt-spun, and then the warp and weft yarns are interwoven to obtain flame-retardant, wear-resistant and conductive fabric.

[0041] The molar ratio of carboxyl groups, γ-aminopropyltriethoxysilane, and dicyclohexylcarbodiimide on the carboxylated carbon nanotubes described in step A1 is 5:1:1.1, and the mass ratio of modified carbon nanotubes to carbon black is 3:1.

[0042] The ratio of the composite filler, deionized water, hexadecyltrimethylammonium bromide, acetonitrile, hydrochloric acid solution, pyrrole, and ferric chloride aqueous solution in step A2 is 1g:200mL:10g:30mL:20mL:0.15g:60mL, the concentration of hydrochloric acid solution is 0.1mol / L, and the mass fraction of ferric chloride aqueous solution is 1%.

[0043] In step A3, the ratio of terephthalic acid, modified monomer, and ethylene glycol is 6:1:8; the amount of manganese acetate is 2% of the total mass of terephthalic acid, modified monomer, and ethylene glycol; the amount of antimony trioxide is 2% of the total mass of terephthalic acid, modified monomer, and ethylene glycol; and the mass ratio of polyester melt to modified filler is 10:1.3.

[0044] The modified monomer is prepared by the following steps:

[0045] Step B1: Octamethylcyclotetrasiloxane, 3-aminopropyldiethoxymethylsilane, tetramethyldisiloxane, tetramethylammonium hydroxide and deionized water are mixed and purged with nitrogen. The mixture is reacted for 4 hours at a speed of 200 r / min and a temperature of 93 °C to obtain pretreated polysiloxane. The pretreated polysiloxane, allyl alcohol, chloroplatinic acid and DMF are mixed and purged with nitrogen. The mixture is reacted for 7 hours at a speed of 300 r / min and a temperature of 80 °C to obtain hydroxylated polysiloxane.

[0046] Step B2: 2,6,7-trioxa-1-phosphabicyclo(2.2.2)octane-4-methanol-1-oxide, epichlorohydrin, boron trifluoride ether, and tetrahydrofuran were mixed and reacted at 300 r / min and 60 °C for 7 h. Sodium hydroxide solution was added and the reaction was continued for 4 h to obtain a flame retardant. Aniline, the flame retardant, and tetrahydrofuran were mixed, and nitrogen gas was introduced for protection. Triethylamine was added and the mixture was stirred at 200 r / min and 70 °C for 9 h to obtain a modified flame retardant.

[0047] Step B3: Mix 4-formylphenylboronic acid, modified flame retardant, 4A molecular sieve, p-toluenesulfonic acid and tetrahydrofuran, and purge with nitrogen. React at 300 r / min and 35°C for 7 h to obtain the modifier. Mix hydroxylated polysiloxane, modifier, triethylamine and xylene, and purge with nitrogen. React at 200 r / min and 110°C for 5 h to obtain the modified monomer.

[0048] In step B1, the molar ratio of octamethylcyclotetrasiloxane, 3-aminopropyldiethoxymethylsilane, tetramethyldisiloxane, tetramethylammonium hydroxide, and deionized water is 1 mol:0.2 mol:1 mol:1.5 mol:20 mL, the molar ratio of pretreated polysiloxane and allyl alcohol is 1:2, and the amount of chloroplatinic acid used is 0.01% of the mass of allyl alcohol.

[0049] In step B2, the ratio of 2,6,7-trioxa-1-phosphabicyclo(2.2.2)octane-4-methanol-1-oxide, epichlorohydrin, boron trifluoride ether, and sodium hydroxide solution is 30 mmol:30 mmol:0.9 g:15 mL, the mass fraction of sodium hydroxide solution is 25%, the molar ratio of aniline to flame retardant is 1:2, and the amount of triethylamine used is 1% of the mass of flame retardant.

[0050] In step B3, the molar ratio of 4-formylphenylboronic acid to the modified flame retardant is 1:1, the amount of 4A molecular sieve is 5% of the mass of the modified flame retardant, the amount of p-toluenesulfonic acid is 1% of the mass of the modified flame retardant, the molar ratio of the amino group on the hydroxylated polysiloxane to the modifier is 1:1, and the amount of triethylamine is 2% of the mass of the modifier.

[0051] Example 3, a method for preparing a flame-retardant and wear-resistant conductive cloth, specifically includes the following steps:

[0052] Step A1: Carboxylated carbon nanotubes, γ-aminopropyltriethoxysilane, and DMF are mixed and protected with nitrogen. Under the conditions of 200 r / min and 75°C, dicyclohexylcarbodiimide is added and the mixture is stirred for 5 h to obtain modified carbon nanotubes. Modified carbon nanotubes, carbon black, and DMF are mixed and protected with nitrogen. Under the conditions of 800 r / min and 70°C, deionized water is added and the mixture is stirred for 1.5 h to obtain composite filler.

[0053] Step A2: Mix the composite packing material, deionized water, hexadecyltrimethylammonium bromide, acetonitrile and hydrochloric acid solution, stir at 150 r / min and 0℃, add pyrrole and ferric chloride aqueous solution, react for 15 h, filter to remove filtrate, wash the substrate with water until neutral, and vacuum dry to obtain the modified packing material.

[0054] Step A3: Terephthalic acid, modified monomer, ethylene glycol and manganese acetate are mixed evenly and reacted at 180°C for 3 hours. Antimony trioxide is added and reacted at 240°C and 0.5 MPa for 5 hours. The temperature is then raised to 285°C and the reaction is carried out at 80 Pa for 30 minutes to obtain polyester melt. The polyester melt and modified filler are mixed and melt-spun, and then the warp and weft yarns are interwoven to obtain flame-retardant, wear-resistant and conductive fabric.

[0055] The molar ratio of carboxyl groups, γ-aminopropyltriethoxysilane, and dicyclohexylcarbodiimide on the carboxylated carbon nanotubes described in step A1 is 5:1:1.1, and the mass ratio of modified carbon nanotubes to carbon black is 3:1.

[0056] The ratio of the composite filler, deionized water, hexadecyltrimethylammonium bromide, acetonitrile, hydrochloric acid solution, pyrrole, and ferric chloride aqueous solution in step A2 is 1g:200mL:10g:30mL:20mL:0.15g:60mL, the concentration of hydrochloric acid solution is 0.1mol / L, and the mass fraction of ferric chloride aqueous solution is 1%.

[0057] In step A3, the ratio of terephthalic acid, modified monomer, and ethylene glycol is 6:1:8; the amount of manganese acetate is 2% of the total mass of terephthalic acid, modified monomer, and ethylene glycol; the amount of antimony trioxide is 2% of the total mass of terephthalic acid, modified monomer, and ethylene glycol; and the mass ratio of polyester melt to modified filler is 10:1.5.

[0058] The modified monomer is prepared by the following steps:

[0059] Step B1: Octamethylcyclotetrasiloxane, 3-aminopropyldiethoxymethylsilane, tetramethyldisiloxane, tetramethylammonium hydroxide and deionized water are mixed and purged with nitrogen. The mixture is reacted for 5 hours at a speed of 200 r / min and a temperature of 95 °C to obtain pretreated polysiloxane. The pretreated polysiloxane, allyl alcohol, chloroplatinic acid and DMF are mixed and purged with nitrogen. The mixture is reacted for 8 hours at a speed of 300 r / min and a temperature of 85 °C to obtain hydroxylated polysiloxane.

[0060] Step B2: 2,6,7-trioxa-1-phosphabicyclo(2.2.2)octane-4-methanol-1-oxide, epichlorohydrin, boron trifluoride ether, and tetrahydrofuran were mixed and reacted at 300 r / min and 65 °C for 8 h. Sodium hydroxide solution was added and the reaction was continued for 5 h to obtain a flame retardant. Aniline, the flame retardant, and tetrahydrofuran were mixed, and nitrogen gas was introduced for protection. Triethylamine was added and the mixture was stirred at 200 r / min and 75 °C for 10 h to obtain a modified flame retardant.

[0061] Step B3: Mix 4-formylphenylboronic acid, modified flame retardant, 4A molecular sieve, p-toluenesulfonic acid and tetrahydrofuran, and purge with nitrogen. React at 300 r / min and 40°C for 8 h to obtain the modifier. Mix hydroxylated polysiloxane, modifier, triethylamine and xylene, and purge with nitrogen. React at 200 r / min and 115°C for 6 h to obtain the modified monomer.

[0062] In step B1, the molar ratio of octamethylcyclotetrasiloxane, 3-aminopropyldiethoxymethylsilane, tetramethyldisiloxane, tetramethylammonium hydroxide, and deionized water is 1 mol:0.2 mol:1 mol:1.5 mol:20 mL, the molar ratio of pretreated polysiloxane and allyl alcohol is 1:2, and the amount of chloroplatinic acid used is 0.01% of the mass of allyl alcohol.

[0063] In step B2, the ratio of 2,6,7-trioxa-1-phosphabicyclo(2.2.2)octane-4-methanol-1-oxide, epichlorohydrin, boron trifluoride ether, and sodium hydroxide solution is 30 mmol:30 mmol:0.9 g:15 mL, the mass fraction of sodium hydroxide solution is 25%, the molar ratio of aniline to flame retardant is 1:2, and the amount of triethylamine used is 1% of the mass of flame retardant.

[0064] In step B3, the molar ratio of 4-formylphenylboronic acid to the modified flame retardant is 1:1, the amount of 4A molecular sieve is 5% of the mass of the modified flame retardant, the amount of p-toluenesulfonic acid is 1% of the mass of the modified flame retardant, the molar ratio of the amino group on the hydroxylated polysiloxane to the modifier is 1:1, and the amount of triethylamine is 2% of the mass of the modifier.

[0065] Comparative Example 1: This comparative example uses carboxylated carbon nanotubes instead of composite fillers, while the remaining steps are the same as in Example 1.

[0066] Comparative Example 2: This comparative example uses carbon nanotubes instead of modified fillers, but the other steps are the same as in Example 1.

[0067] Comparative Example 3: This comparative example uses a modified flame retardant instead of a modified monomer, but the other steps are the same as in Example 1.

[0068] The conductive fabrics obtained in Examples 1-3 and Comparative Examples 1-3 were prepared into 125mm×13mm×10mm samples according to GB / T2408-2008 standard, and their vertical flammability was tested. Samples of 75mm×75mm×1mm were prepared according to ISO5659-2 standard, and tested at a power of 25kW / m². 2Under the specified conditions, the smoke emission was detected. At room temperature, the conductivity of the sample was tested using a Keithley 2400-four-probe conductivity meter at a voltage of 200V. The test results are shown in Table 1 below.

[0069] Table 1

[0070] Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Vertical flammability rating V0 V0 V0 V0 V0 V1 <![CDATA[Smoke release rate m 2 / s]]> 0.024 0.018 0.012 0.043 0.061 0.106 Conductivity S / cm <![CDATA[7.03×10 -2 ]]> <![CDATA[6.81×10 -2 ]]> <![CDATA[5.32×10 -2 ]]> <![CDATA[2.26×10 -3 ]]> <![CDATA[9.18×10 -3 ]]> <![CDATA[7.01×10 -2 ]]>

[0071] As shown in Table 1, this application has excellent flame retardant and electrical conductivity properties.

[0072] The above description is merely an example and illustration of the concept of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the concept of the invention or exceed the scope defined in the claims, they should all fall within the protection scope of the present invention.

Claims

1. A method for preparing a flame-retardant and wear-resistant conductive cloth, characterized in that: Specifically, the steps include the following: Step A1: Mix carboxylated carbon nanotubes, γ-aminopropyltriethoxysilane and DMF, purge with nitrogen, stir and add dicyclohexylcarbodiimide to react and obtain modified carbon nanotubes. Mix modified carbon nanotubes, carbon black and DMF, purge with nitrogen, stir and add deionized water to react and obtain composite filler. Step A2: Mix and stir the composite packing material, deionized water, hexadecyltrimethylammonium bromide, acetonitrile and hydrochloric acid solution, add pyrrole and ferric chloride aqueous solution, react, filter to remove filtrate, wash the substrate with water until neutral, and vacuum dry to obtain the modified packing material; Step A3: After mixing and reacting terephthalic acid, modified monomer, ethylene glycol and manganese acetate, antimony trioxide is added and reacted to obtain polyester melt. The polyester melt and modified filler are mixed and melt-spun, and then the warp and weft yarns are interwoven to obtain flame-retardant, wear-resistant and conductive fabric.

2. The method for preparing a flame-retardant and wear-resistant conductive cloth according to claim 1, characterized in that: The molar ratio of carboxyl groups, γ-aminopropyltriethoxysilane, and dicyclohexylcarbodiimide on the carboxylated carbon nanotubes described in step A1 is 5:1:1.1, and the mass ratio of modified carbon nanotubes to carbon black is 3:

1.

3. The method for preparing a flame-retardant and wear-resistant conductive cloth according to claim 1, characterized in that: The ratio of the composite filler, deionized water, hexadecyltrimethylammonium bromide, acetonitrile, hydrochloric acid solution, pyrrole and ferric chloride aqueous solution used in step A2 is 1g:200mL:10g:30mL:20mL:0.15g:60mL.

4. The method for preparing a flame-retardant and wear-resistant conductive cloth according to claim 1, characterized in that: The ratio of terephthalic acid, modified monomer and ethylene glycol in step A3 is 6:1:8, and the mass ratio of polyester melt and modified filler is 10:1-1.

5.

5. The method for preparing a flame-retardant and wear-resistant conductive cloth according to claim 1, characterized in that: The modified monomer is prepared by the following steps: Step B1: Mix octamethylcyclotetrasiloxane, 3-aminopropyldiethoxymethylsilane, tetramethyldisiloxane, tetramethylammonium hydroxide and deionized water, and react under nitrogen protection to obtain pretreated polysiloxane. Mix the pretreated polysiloxane, allyl alcohol, chloroplatinic acid and DMF, and react under nitrogen protection to obtain hydroxylated polysiloxane. Step B2: Mix 2,6,7-trioxa-1-phosphabicyclo(2.2.2)octane-4-methanol-1-oxide, epichlorohydrin, boron trifluoride ether, and tetrahydrofuran, react them, add sodium hydroxide solution, and continue the reaction to obtain a flame retardant. Mix aniline, the flame retardant, and tetrahydrofuran, purge with nitrogen for protection, stir, add triethylamine, and react to obtain a modified flame retardant. Step B3: Mix 4-formylphenylboronic acid, modified flame retardant, 4A molecular sieve, p-toluenesulfonic acid and tetrahydrofuran, and react under nitrogen protection to obtain the modifier. Mix hydroxylated polysiloxane, modifier, triethylamine and xylene, and react under nitrogen protection to obtain the modified monomer.

6. The method for preparing a flame-retardant and wear-resistant conductive cloth according to claim 5, characterized in that: The molar ratio of octamethylcyclotetrasiloxane, 3-aminopropyldiethoxymethylsilane, tetramethyldisiloxane, tetramethylammonium hydroxide and deionized water in step B1 is 1 mol:0.2 mol:1 mol:1.5 mol:20 mL, and the molar ratio of pretreated polysiloxane and allyl alcohol is 1:

2.

7. The method for preparing a flame-retardant and wear-resistant conductive cloth according to claim 5, characterized in that: The ratio of 2,6,7-trioxa-1-phosphabicyclo(2.2.2)octane-4-methanol-1-oxide, epichlorohydrin, boron trifluoride ether, and sodium hydroxide solution in step B2 is 30 mmol:30 mmol:0.9 g:15 mL, and the molar ratio of aniline to flame retardant is 1:

2.

8. The method for preparing a flame-retardant and wear-resistant conductive cloth according to claim 5, characterized in that: The molar ratio of 4-formylphenylboronic acid and modified flame retardant in step B3 is 1:1, and the molar ratio of amino groups on the hydroxylated polysiloxane and the modifier is 1:

1.

9. A flame-retardant and wear-resistant conductive cloth, characterized in that: Prepared according to any one of the preparation methods described in claims 1-8.