Flame-retardant elastic textile fabric and processing method thereof

Abstract

The invention relates to the technical field of textile fabrics, and discloses a flame-retardant elastic textile fabric and a processing method thereof.The processing method includes the steps that chinlon, acrylic fibers, conductive fibers, soybean protein glue, poly (p-dioctyl phthalate), phosphorus-containing modified benzoxazine and graphene oxide modified boric acid are stirred and mixed; extruding, granulating and drawing through a screw extruder to obtain warps; the spandex and the wool fibers are mixed according to the weight part ratio, the wool fibers are arranged on the outer side of the spandex through a conjugate spinning assembly, and then drawing is conducted to obtain wefts; and weaving the warp yarns and the weft yarns on a weaving machine to obtain the flame-retardant elastic textile fabric. NO2, CO2 and H2O generated during thermal decomposition of benzoxazine in phosphorus-containing modified benzoxazine can inhibit flame spreading, so that the flame-retardant effect is achieved, boron and phosphorus in the phosphorus-containing modified benzoxazine have good flame-retardant effects, a flame-retardant system is formed by the boron, the phosphorus, a graphene oxide structure in graphene oxide modified boric acid and phosphorus, and the good flame-retardant effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of textile fabrics, in particular to a flame-retardant elastic textile fabric and a processing method thereof. Background Art

[0002] Textiles refer to products made by weaving textile fibers. There are many kinds of textile fabrics on the market, which play an increasingly important role in people's daily lives. However, when encountering a fire, they are flammable, which affects their normal use. Therefore, how to avoid this phenomenon is the key to solving the problem. For example, patent CN115305617A discloses a wear-resistant textile fabric and its preparation method. The textile fabric has good wear resistance and elasticity, and has good air permeability, which can meet the application requirements of multiple fields, but its flame retardant effect has not been improved. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies in the prior art, the present invention provides a flame-retardant elastic textile fabric and a processing method thereof, which has a good flame-retardant effect.

[0005] (II) Technical solution

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a flame-retardant elastic textile fabric, the flame-retardant elastic textile fabric is woven by warp and weft, the warp comprises, by weight, 30-50 parts of nylon, 18-25 parts of acrylic fiber, 4-8 parts of conductive fiber, 4-5 parts of soy protein glue, 1-3 parts of polyphthalate diester, 2-4 parts of phosphorus-modified benzoxazine, and 2-6 parts of graphene oxide-modified boric acid; the weft consists of spandex and wool fiber coated on the outside of the spandex, wherein the weight ratio of spandex to wool fiber is 70-90 parts of spandex and 12-20 parts of wool fiber.

[0007] Preferably, the preparation method of the phosphorus-modified benzoxazine is:

[0008] (1) adding 4-10 parts by weight of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and xylene solvent into a stirrer, stirring mechanically, introducing nitrogen protection, heating to 75-90° C., and after the 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide is completely dissolved, adding 8-15 parts by weight of formaldehyde solution, reacting for 5-8 hours, cooling to room temperature after the reaction, removing the white solid product, filtering under normal pressure, and washing with ethanol to obtain intermediate 1;

[0009] (2) adding 4-aminophenylboronic acid and intermediate 1 to N,N-dimethylformamide solvent, introducing nitrogen protection, stirring evenly, reacting at 70-90° C. for 4-7 hours, cooling to room temperature after completion, filtering, washing and drying to obtain phosphorus-modified boronic acid;

[0010] (3) Adding the phosphorus-modified boronic acid, an aqueous solution of formaldehyde, and phenol to a toluene solvent, fully dissolving them, and carrying out a cyclization reaction at 65-90° C. for 10-14 hours. After completion, the reaction is distilled under reduced pressure, washed with deionized water, and the crude product is recrystallized from dichloromethane to obtain a phosphorus-modified benzoxazine.

[0011] Preferably, the mass ratio of 4-aminophenylboronic acid to intermediate 2 in (2) is 0.8-1.3:1.

[0012] Preferably, the mass ratio of phosphorus-modified boric acid, aqueous solution of formaldehyde, and phenol in (3) is 1:1.4-1.6:1.3-1.5.

[0013] Preferably, the preparation method of the graphene oxide modified boric acid is: adding chlorinated graphene oxide and phosphorus-modified boric acid to a reactor filled with N,N-dimethylformamide solvent, stirring evenly, then adding triethylamine catalyst thereto, reacting at 75-90°C for 6-10h, and then distilling under reduced pressure and washing to obtain graphene oxide modified boric acid.

[0014] Preferably, the mass ratio of the chlorinated graphene oxide, phosphorus-modified boric acid, and triethylamine catalyst is 1:0.9-1.2:0.01-0.03.

[0015] Preferably, the processing method of the flame retardant elastic textile fabric is:

[0016] S1. Preparation of warp: nylon, acrylic fiber, conductive fiber, soy protein glue, polydimethyl methacrylate, phosphorus-modified benzoxazine, and graphene oxide-modified boric acid are mixed and stirred, and the mixture is extruded and granulated by a screw extruder at 260-300°C and then drawn to obtain a warp;

[0017] S2. Preparation of weft: Spandex and wool fibers are mixed in a weight ratio through a conjugate spinning assembly to draw the wool fibers on the outside of the spandex to obtain weft;

[0018] S3. Preparation of flame-retardant elastic textile fabric: The flame-retardant elastic textile fabric can be obtained by weaving the above-mentioned warp and weft on a weaving machine.

[0019] (III) Beneficial technical effects

[0020] The invention comprises the following steps: mixing nylon, acrylic fiber, conductive fiber, soybean protein glue, poly(p-diphthalate) diester, phosphorus-modified benzoxazine and graphene oxide-modified boric acid, extruding and granulating through a screw extruder and drawing to obtain warp threads; passing spandex and wool fibers through a conjugate spinning assembly according to a weight ratio, drawing the wool fibers on the outside of the spandex to obtain weft threads; and weaving the warp threads and weft threads on a weaving machine to obtain a flame-retardant elastic textile fabric.

[0021] NO2, CO2 and H2O generated during the thermal decomposition of benzoxazine in phosphorus-modified benzoxazine will inhibit the spread of flame, thereby achieving a flame retardant effect. The boron and phosphorus elements therein also have good flame retardant effects, and together with the graphene oxide structure and phosphorus element in graphene oxide modified boric acid, they constitute a flame retardant system, which has a good flame retardant effect. In addition, the acylated graphene oxide itself has more grafting sites, and after reacting with the amino group in the phosphorus-modified boric acid, the substitution degree of phosphorus and boron elements is further increased, making its flame retardant effect better. DETAILED DESCRIPTION

[0022] Preparation of acylated graphene oxide: 2 g of graphene oxide was ultrasonically dispersed in 15 g of thionyl chloride. After uniform dispersion, the mixture was reacted at 70° C. for 18 h. After the reaction, the mixture was filtered, washed, and dried to obtain acylated graphene oxide.

[0023] Example 1

[0024] A flame retardant elastic textile fabric is woven from warp threads and weft threads, wherein the warp threads comprise, by weight, 30-50 parts of nylon, 18-25 parts of acrylic fibers, 4-8 parts of conductive fibers, 4-5 parts of soy protein glue, 1-3 parts of polyphthalate diester, 2-4 parts of phosphorus-modified benzoxazine, and 2-6 parts of graphene oxide-modified boric acid; and the weft threads consist of spandex and wool fibers coated on the outside of the spandex, wherein the weight ratio of spandex to wool fibers is 70-90 parts of spandex to 12-20 parts of wool fibers.

[0025] (1) adding 4-10 parts by weight of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and xylene solvent into a stirrer, stirring mechanically, introducing nitrogen protection, heating to 75-90° C., and after the 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide is completely dissolved, adding 8-15 parts by weight of formaldehyde solution, reacting for 5-8 hours, cooling to room temperature after the reaction, removing the white solid product, filtering under normal pressure, and washing with ethanol to obtain intermediate 1;

[0026] (2) adding 4-aminophenylboronic acid and intermediate 1 to N,N-dimethylformamide solvent, wherein the mass ratio of 4-aminophenylboronic acid to intermediate 2 is 0.8-1.3:1, introducing nitrogen protection, stirring evenly, reacting at 70-90° C. for 4-7 hours, cooling to room temperature after completion, filtering, washing and drying to obtain phosphorus-modified boronic acid;

[0027] (3) adding phosphorus-modified boronic acid, an aqueous solution of formaldehyde, and phenol to a toluene solvent, wherein the mass ratio of phosphorus-modified boronic acid, the aqueous solution of formaldehyde, and phenol is 1:1.4-1.6:1.3-1.5, fully dissolving, and carrying out a cyclization reaction at 65-90° C. for 10-14 hours. After completion, distillation under reduced pressure is performed, and the product is washed with deionized water. The crude product is recrystallized from dichloromethane to obtain a phosphorus-modified benzoxazine;

[0028] (4) adding the chlorinated graphene oxide and the phosphorus-modified boronic acid to a reactor containing an N,N-dimethylformamide solvent, stirring evenly, and then adding a triethylamine catalyst thereto, wherein the mass ratio of the chlorinated graphene oxide, the phosphorus-modified boronic acid, and the triethylamine catalyst is 1:0.9-1.2:0.01-0.03, reacting at 75-90° C. for 6-10 hours, and then distilling under reduced pressure and washing to obtain the graphene oxide-modified boronic acid;

[0029] (5) preparing warp yarns: mixing nylon, acrylic fiber, conductive fiber, soybean protein glue, poly(diphthalate), phosphorus-modified benzoxazine, and graphene oxide-modified boric acid, and extruding and granulating the mixture through a screw extruder at 260-300° C. and drawing the mixture to obtain warp yarns;

[0030] (6) preparing the weft yarn: according to the weight ratio, spandex and wool fiber are passed through a conjugate spinning assembly, and the wool fiber is stretched outside the spandex to obtain the weft yarn;

[0031] (7) Preparation of flame-retardant elastic textile fabrics: The flame-retardant elastic textile fabrics can be obtained by weaving the above-mentioned warp and weft on a weaving machine.

[0032] Example 2

[0033] A flame retardant elastic textile fabric is woven from warp threads and weft threads, wherein the warp threads comprise, by weight, 30-50 parts of nylon, 18-25 parts of acrylic fibers, 4-8 parts of conductive fibers, 4-5 parts of soy protein glue, 1-3 parts of polyphthalate diester, 2-4 parts of phosphorus-modified benzoxazine, and 2-6 parts of graphene oxide-modified boric acid; and the weft threads consist of spandex and wool fibers coated on the outside of the spandex, wherein the weight ratio of spandex to wool fibers is 70-90 parts of spandex to 12-20 parts of wool fibers.

[0034] (1) adding 4-10 parts by weight of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and xylene solvent into a stirrer, stirring mechanically, introducing nitrogen protection, heating to 75-90° C., and after the 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide is completely dissolved, adding 8-15 parts by weight of formaldehyde solution, reacting for 5-8 hours, cooling to room temperature after the reaction, removing the white solid product, filtering under normal pressure, and washing with ethanol to obtain intermediate 1;

[0035] (2) adding 4-aminophenylboronic acid and intermediate 1 to N,N-dimethylformamide solvent, wherein the mass ratio of 4-aminophenylboronic acid to intermediate 2 is 0.8-1.3:1, introducing nitrogen protection, stirring evenly, reacting at 70-90° C. for 4-7 hours, cooling to room temperature after completion, filtering, washing and drying to obtain phosphorus-modified boronic acid;

[0036] (3) adding phosphorus-modified boronic acid, an aqueous solution of formaldehyde, and phenol to a toluene solvent, wherein the mass ratio of phosphorus-modified boronic acid, the aqueous solution of formaldehyde, and phenol is 1:1.4-1.6:1.3-1.5, fully dissolving, and carrying out a cyclization reaction at 65-90° C. for 10-14 hours. After completion, distillation under reduced pressure is performed, and the product is washed with deionized water. The crude product is recrystallized from dichloromethane to obtain a phosphorus-modified benzoxazine;

[0037] (4) adding the chlorinated graphene oxide and the phosphorus-modified boronic acid to a reactor containing an N,N-dimethylformamide solvent, stirring evenly, and then adding a triethylamine catalyst thereto, wherein the mass ratio of the chlorinated graphene oxide, the phosphorus-modified boronic acid, and the triethylamine catalyst is 1:0.9-1.2:0.01-0.03, reacting at 75-90° C. for 6-10 hours, and then distilling under reduced pressure and washing to obtain the graphene oxide-modified boronic acid;

[0038] (5) preparing warp yarns: mixing nylon, acrylic fiber, conductive fiber, soybean protein glue, poly(diphthalate), phosphorus-modified benzoxazine, and graphene oxide-modified boric acid, and extruding and granulating the mixture through a screw extruder at 260-300° C. and drawing the mixture to obtain warp yarns;

[0039] (6) preparing the weft yarn: according to the weight ratio, spandex and wool fiber are passed through a conjugate spinning assembly, and the wool fiber is stretched outside the spandex to obtain the weft yarn;

[0040] (7) Preparation of flame-retardant elastic textile fabrics: The flame-retardant elastic textile fabrics can be obtained by weaving the above-mentioned warp and weft on a weaving machine.

[0041] Example 3

[0042] A flame retardant elastic textile fabric is woven from warp threads and weft threads, wherein the warp threads comprise, by weight, 30-50 parts of nylon, 18-25 parts of acrylic fibers, 4-8 parts of conductive fibers, 4-5 parts of soy protein glue, 1-3 parts of polyphthalate diester, 2-4 parts of phosphorus-modified benzoxazine, and 2-6 parts of graphene oxide-modified boric acid; and the weft threads consist of spandex and wool fibers coated on the outside of the spandex, wherein the weight ratio of spandex to wool fibers is 70-90 parts of spandex to 12-20 parts of wool fibers.

[0043] (1) adding 4-10 parts by weight of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and xylene solvent into a stirrer, stirring mechanically, introducing nitrogen protection, heating to 75-90° C., and after the 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide is completely dissolved, adding 8-15 parts by weight of formaldehyde solution, reacting for 5-8 hours, cooling to room temperature after the reaction, removing the white solid product, filtering under normal pressure, and washing with ethanol to obtain intermediate 1;

[0044] (2) adding 4-aminophenylboronic acid and intermediate 1 to N,N-dimethylformamide solvent, wherein the mass ratio of 4-aminophenylboronic acid to intermediate 2 is 0.8-1.3:1, introducing nitrogen protection, stirring evenly, reacting at 70-90° C. for 4-7 hours, cooling to room temperature after completion, filtering, washing and drying to obtain phosphorus-modified boronic acid;

[0045] (3) adding phosphorus-modified boronic acid, an aqueous solution of formaldehyde, and phenol to a toluene solvent, wherein the mass ratio of phosphorus-modified boronic acid, the aqueous solution of formaldehyde, and phenol is 1:1.4-1.6:1.3-1.5, fully dissolving, and carrying out a cyclization reaction at 65-90° C. for 10-14 hours. After completion, distillation under reduced pressure is performed, and the product is washed with deionized water. The crude product is recrystallized from dichloromethane to obtain a phosphorus-modified benzoxazine;

[0046] (4) adding the chlorinated graphene oxide and the phosphorus-modified boronic acid to a reactor containing an N,N-dimethylformamide solvent, stirring evenly, and then adding a triethylamine catalyst thereto, wherein the mass ratio of the chlorinated graphene oxide, the phosphorus-modified boronic acid, and the triethylamine catalyst is 1:0.9-1.2:0.01-0.03, reacting at 75-90° C. for 6-10 hours, and then distilling under reduced pressure and washing to obtain the graphene oxide-modified boronic acid;

[0047] (5) preparing warp yarns: mixing nylon, acrylic fiber, conductive fiber, soybean protein glue, poly(diphthalate), phosphorus-modified benzoxazine, and graphene oxide-modified boric acid, and extruding and granulating the mixture through a screw extruder at 260-300° C. and drawing the mixture to obtain warp yarns;

[0048] (6) preparing the weft yarn: according to the weight ratio, spandex and wool fiber are passed through a conjugate spinning assembly, and the wool fiber is stretched outside the spandex to obtain the weft yarn;

[0049] (7) Preparation of flame-retardant elastic textile fabrics: The flame-retardant elastic textile fabrics can be obtained by weaving the above-mentioned warp and weft on a weaving machine.

[0050] Comparative Example 1

[0051] This comparative example is different from Example 3 in that no phosphorus-modified benzoxazine is added.

[0052] Comparative Example 2

[0053] This comparative example is different from Example 3 in that graphene oxide-modified boric acid is not added.

[0054] Use an oxygen index meter to test the limiting oxygen index of water-based paint; use a horizontal and vertical combustion instrument to test the combustion level of water-based paint.

[0055] Table 1: Flame retardancy tests.

[0056] project Limiting oxygen index (%) Combustion level Example 1 30 V-0 Example 2 33 V-0 Example 3 31 V-0 Comparative Example 1 20 V-1 Comparative Example 2 21 V-1

[0057] It can be seen from Table 1 that the flame retardant effect of Examples 1-3 is better than that of Comparative Examples 1-2, which indicates that the flame retardant elastic textile fabric prepared by the present invention has good flame retardant effect.

[0058] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A flame retardant elastic textile fabric, characterized in that: The flame-retardant elastic textile fabric is woven from warp and weft, wherein the warp comprises, by weight, 30-50 parts of nylon, 18-25 parts of acrylic, 4-8 parts of conductive fiber, 4-5 parts of soy protein glue, 1-3 parts of poly(phthalate), 2-4 parts of phosphorus-modified benzoxazine, and 2-6 parts of graphene oxide-modified boric acid; and the weft consists of spandex and wool fiber coated on the outside of the spandex, wherein the weight ratio of spandex to wool fiber is 70-90 parts of spandex and 12-20 parts of wool fiber.

2. The flame retardant elastic textile fabric according to claim 1, characterized in that: The preparation method of the phosphorus-modified benzoxazine is as follows: (1) adding 4-10 parts by weight of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and xylene solvent into a stirrer, stirring mechanically, introducing nitrogen protection, heating to 75-90° C., and after the 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide is completely dissolved, adding 8-15 parts by weight of formaldehyde solution, reacting for 5-8 hours, cooling to room temperature after the reaction, removing the white solid product, filtering under normal pressure, and washing with ethanol to obtain intermediate 1; (2) adding 4-aminophenylboronic acid and intermediate 1 to N,N-dimethylformamide solvent, introducing nitrogen protection, stirring evenly, reacting at 70-90° C. for 4-7 hours, cooling to room temperature after completion, filtering, washing and drying to obtain phosphorus-modified boronic acid; (3) Adding the phosphorus-modified boronic acid, an aqueous solution of formaldehyde, and phenol to a toluene solvent, fully dissolving them, and carrying out a cyclization reaction at 65-90° C. for 10-14 hours. After completion, the reaction is distilled under reduced pressure, washed with deionized water, and the crude product is recrystallized from dichloromethane to obtain a phosphorus-modified benzoxazine.

3. The flame retardant elastic textile fabric according to claim 2, characterized in that: The mass ratio of 4-aminophenylboronic acid to intermediate 2 in (2) is 0.8-1.3:

1.

4. The flame retardant elastic textile fabric according to claim 2, characterized in that: The mass ratio of phosphorus-modified boric acid, aqueous solution of formaldehyde and phenol in (3) is 1:1.4-1.6:1.3-1.

5.

5. The flame retardant elastic textile fabric according to claim 1, characterized in that: The preparation method of the graphene oxide modified boric acid is as follows: adding chlorinated graphene oxide and phosphorus-modified boric acid into a reactor filled with N,N-dimethylformamide solvent, stirring evenly, then adding triethylamine catalyst thereto, reacting at 75-90° C. for 6-10 hours, and then performing reduced pressure distillation and washing to obtain the graphene oxide modified boric acid.

6. The flame retardant elastic textile fabric according to claim 5, characterized in that: The mass ratio of the chlorinated graphene oxide, the phosphorus-modified boric acid, and the triethylamine catalyst is 1:0.9-1.2:0.01-0.

03.

7. A method for processing a flame retardant elastic textile fabric according to any one of claims 1 to 6, characterized in that: The processing method of the flame retardant elastic textile fabric is: S1. Preparation of warp: nylon, acrylic fiber, conductive fiber, soy protein glue, polydimethyl methacrylate, phosphorus-modified benzoxazine, and graphene oxide-modified boric acid are mixed and stirred, and the mixture is extruded and granulated by a screw extruder at 260-300°C and then drawn to obtain a warp; S2. Preparation of weft: Spandex and wool fibers are mixed in a weight ratio by a conjugate spinning assembly, and the wool fibers are drawn on the outside of the spandex to obtain weft; S3. Preparation of flame-retardant elastic textile fabric: The flame-retardant elastic textile fabric can be obtained by weaving the above-mentioned warp and weft on a weaving machine.