阅读说明：本技术 一种废旧纺织品再生制造的隔音材料及其生产工艺 (Sound insulation material prepared by regenerating waste textiles and production process thereof ) 是由 高翔宇 李飞 张晓磊 李小燕 杨天二 于 2021-10-11 设计创作，主要内容包括：本发明公开了一种废旧纺织品再生制造的隔音材料及其生产工艺,由熔融料与纤维骨架复合制得；熔融料包括如下重量份原料：EVA树脂100-120份、玻璃纤维30-50份、纳米二氧化硅10-15份、碳酸钙10-15份、氢氧化铝40-50份；熔融料以EVA树脂为基料,加入玻璃纤维、纳米二氧化硅、碳酸钙,使得制备出的隔音材料具有很好的隔音效果,同时加入氢氧化铝使得熔融料具有一定的阻燃效果,纤维骨架增强了隔音材料的韧性,同时与传统隔音阻燃材料不同,该材料不是由阻燃剂与隔音材料共混制得,纤维骨架内部的阻燃成分分散的更为均匀,同时不会随着隔音材料的长时间使用出现脱落,进而保证了隔音材料的阻燃效果。(The invention discloses a sound insulation material made by regenerating waste textiles and a production process thereof, which is prepared by compounding a melting material and a fiber framework; the melting material comprises the following raw materials in parts by weight: 100-120 parts of EVA resin, 30-50 parts of glass fiber, 10-15 parts of nano silicon dioxide, 10-15 parts of calcium carbonate and 40-50 parts of aluminum hydroxide; the melting material uses EVA resin as the base material, add glass fiber, nanometer silica, calcium carbonate, make the acoustic barrier material who prepares out have fine syllable-dividing effect, add aluminium hydroxide simultaneously and make the melting material have certain flame retardant efficiency, fiber framework has strengthened acoustic barrier material's toughness, simultaneously different with traditional sound insulation flame retardant material, this material is not made by fire retardant and acoustic barrier material blending, the inside fire-retardant composition dispersion of fiber framework is more even, simultaneously can not appear droing along with acoustic barrier material's long-time use, and then guaranteed acoustic barrier material's flame retardant efficiency.)

1. A sound insulation material made by regenerating waste textiles is characterized in that: is prepared by compounding a melting material and a fiber framework;

the fiber framework is prepared by the following steps:

step A1: dispersing phenyl phosphoryl dichloride in tetrahydrofuran, adding liquid methane chloride and aluminum chloride, performing reflux reaction to obtain an intermediate 1, uniformly mixing piperazine and chloroform, stirring, adding triethylamine and the intermediate 1, reacting, and heating to react to obtain an intermediate 2;

step A2: dissolving the intermediate 2 in tetrahydrofuran, stirring, adding phosphorus oxychloride and triethylamine, reacting, performing reflux reaction to obtain an intermediate 3, uniformly mixing the intermediate 3, p-hydroxybenzaldehyde, triethylamine and tetrahydrofuran, performing reflux reaction, adding aniline, continuing to react, adding DOPO, and heating to react to obtain an intermediate 4;

step A3: mixing the intermediate 4, N-bromosuccinimide, benzoyl peroxide and carbon tetrachloride for reaction to prepare an intermediate 5, adding the intermediate 5, potassium carbonate, deionized water and tetraethylammonium bromide into a reaction kettle for reflux reaction to prepare an intermediate 6, uniformly mixing the intermediate 6, acrylic acid, toluene and concentrated sulfuric acid, and then carrying out reflux reaction to prepare an intermediate 7;

step A4: dissolving epoxy resin E-51 in xylene, adding p-hydroxyanisole, stirring, adding acrylic acid and triethylamine, reacting to obtain epoxy acrylic resin, adding the epoxy acrylic resin, the intermediate 7, methyl methacrylate and the xylene into a reaction kettle, stirring, adding azobisisobutyronitrile, reacting, adding benzoyl peroxide, and continuing to react to obtain modified resin;

step A5: dissolving the modified resin in xylene, adding fiber bundles, performing ultrasonic treatment to obtain a spinning solution, performing wet spinning by using the spinning solution to obtain composite fibers, and weaving the composite fibers to obtain the fiber framework.

2. The sound insulation material made by recycling waste textiles according to claim 1, wherein: the dosage molar ratio of the phenylphosphoryl dichloride and the monochloromethane in the step A1 is 1:1, and the dosage ratio of the piperazine and the intermediate 1 is 2: 1.

3. The sound insulation material made by recycling waste textiles according to claim 1, wherein: the molar ratio of the intermediate 2 to the phosphorus oxychloride in the step A2 is 1:2, and the molar ratio of the intermediate 3, the p-hydroxybenzaldehyde, the aniline and the DOPO is 1:4:4: 4.

4. The sound insulation material made by recycling waste textiles according to claim 1, wherein: the dosage ratio of the intermediate 4, the N-bromosuccinimide, the benzoyl peroxide and the carbon tetrachloride in the step A3 is 0.2mol:0.2mol:0.3g:300mL, the dosage ratio of the intermediate 1, the potassium carbonate, the deionized water and the tetraethylammonium bromide is 3.5g:9g:100mL:5mL, and the dosage molar ratio of the intermediate 6 and the acrylic acid is 1: 1.

5. The sound insulation material made by recycling waste textiles according to claim 1, wherein: the molar ratio of the epoxy resin E-51 to the acrylic acid in the step A4 is 1:1, and the mass ratio of the epoxy acrylic resin, the intermediate 7, the methyl methacrylate, the azobisisobutyronitrile and the benzoyl peroxide is 20:15:2:0.45: 0.3.

6. The sound insulation material made by recycling waste textiles according to claim 1, wherein: the dosage ratio of the modified resin, the dimethylbenzene and the fiber bundle in the step A5 is 2g to 15mL to 1 g.

7. The sound insulation material made by recycling waste textiles according to claim 1, wherein: the fiber bundle is prepared by the following steps:

step B1: soaking the waste textile in a sodium hydroxide solution, then passing through clear water, soaking in a sodium chloride solution for 20-30min, and then passing through clear water to obtain a pretreated textile;

step B2: cutting and dry tearing the pretreated textile, loosening and opening to form regenerated cotton, and drawing into fiber bundles.

8. The process for producing the sound insulation material made by recycling the waste textiles according to claim 1, wherein the process comprises the following steps: the method specifically comprises the following steps:

step S1: weighing EVA resin, glass fiber, nano silicon dioxide, calcium carbonate and aluminum hydroxide, adding into a double-screw extruder, and performing melt extrusion to prepare a molten material;

step S2: and (3) putting the fiber framework into a grinding tool, adding the molten material until the molten material completely wraps the fiber framework, pressing and cooling to obtain the sound insulation material.

Technical Field

The invention relates to the technical field of sound insulation material preparation, in particular to a sound insulation material prepared by regenerating waste textiles and a production process thereof.

Background

With the continuous acceleration of urbanization, noise pollution becomes more serious, and in order to effectively cut off noise, a common solution is to use sound insulation materials, the existing sound insulation materials are generally cement concrete, glass plates and the like, and the sound insulation effect of the sound insulation materials is not good, so that the common solution is to increase the thickness of the sound insulation materials, but the problems caused by the fact that the sound insulation materials are too heavy in quality, too high in cost and quite inconvenient in installation process;

EVA has certain water proof thermal-insulated and shock resistance ability, and is nontoxic, environmental protection and pleasing to the eye, and the thermal-insulated insulation material is regarded as in the common use, and current acoustic barrier material bending strength is low, easily appears damaging in installation and use, and self flame retardant efficiency is poor simultaneously, and partial acoustic barrier material can blend the fire retardant for promoting flame retardant efficiency when preparing for after using a period, the granule can appear in acoustic barrier material and drop, and then influences normal use.

Disclosure of Invention

The invention aims to provide a sound insulation material made of waste textiles through regeneration and a production process thereof, and solves the problems that the sound insulation material in the prior art is low in bending strength, poor in flame retardant effect and greatly reduced in self performance after long-time use through a fiber framework.

The purpose of the invention can be realized by the following technical scheme:

a sound insulation material made by regenerating waste textiles is prepared by compounding a melting material and a fiber framework;

the melting material comprises the following raw materials in parts by weight: 100-120 parts of EVA resin, 30-50 parts of glass fiber, 10-15 parts of nano silicon dioxide, 10-15 parts of calcium carbonate and 40-50 parts of aluminum hydroxide;

the sound insulation material is prepared by the following steps:

step S1: weighing the raw materials, adding the raw materials into a double-screw extruder, and performing melt extrusion at the temperature of 150-160 ℃ to prepare a molten material;

step S2: and (3) putting the fiber framework into a grinding tool, adding the molten material until the molten material completely wraps the fiber framework, pressing and cooling to obtain the sound insulation material.

Further, the fiber skeleton is prepared by the following steps:

step A1: dispersing phenyl phosphoryl dichloride in tetrahydrofuran, adding liquid methane chloride and aluminum chloride, performing reflux reaction for 3-5h at the rotation speed of 150-200r/min and the temperature of 70-75 ℃ to obtain an intermediate 1, uniformly mixing piperazine and chloroform, stirring at the rotation speed of 200-300r/min and the temperature of-5-0 ℃, adding triethylamine and the intermediate 1, reacting for 20-30min, heating to the temperature of 20-30 ℃, and continuing to react for 2-3h to obtain an intermediate 2;

the reaction process is as follows:

step A2: dissolving the intermediate 2 in tetrahydrofuran, stirring and adding phosphorus oxychloride and triethylamine under the conditions that the rotation speed is 150-200r/min and the temperature is-5-0 ℃, reacting for 30-40min, heating to 70-75 ℃, performing reflux reaction for 10-15h to obtain an intermediate 3, uniformly mixing the intermediate 3, p-hydroxybenzaldehyde, triethylamine and tetrahydrofuran, performing reflux reaction for 20-25h at the temperature of 70-80 ℃, adding aniline, reacting for 15-20h at the temperature of 50-60 ℃, adding DOPO, heating to 70-80 ℃, and continuing to react for 10-15h to obtain an intermediate 4;

the reaction process is as follows:

step A3: adding the intermediate 4, N-bromosuccinimide, benzoyl peroxide and carbon tetrachloride into a reaction kettle, reacting for 8-10h at the temperature of 80-90 ℃ to obtain an intermediate 5, adding the intermediate 5, potassium carbonate, deionized water and tetraethylammonium bromide into the reaction kettle, performing reflux reaction for 2-3h to obtain an intermediate 6, uniformly mixing the intermediate 6, acrylic acid, toluene and concentrated sulfuric acid, and performing reflux reaction for 8-10h at the temperature of 115 ℃ and 120 ℃ to obtain an intermediate 7;

the reaction process is as follows:

step A4: dissolving epoxy resin E-51 in xylene, adding p-hydroxyanisole, stirring at the rotation speed of 150-200r/min and at the temperature of 85-95 ℃, adding acrylic acid and triethylamine, reacting for 4-6h to obtain epoxy acrylic resin, adding the epoxy acrylic resin, the intermediate 7, methyl methacrylate and xylene into a reaction kettle, stirring at the rotation speed of 150-200r/min and at the temperature of 100-110 ℃, adding azobisisobutyronitrile, reacting for 1-2h, adding benzoyl peroxide, and continuing to react for 2-3h to obtain modified resin;

the reaction process is as follows:

step A5: dissolving modified resin in xylene, adding fiber bundle, performing ultrasonic treatment for 2-4h under the condition of frequency of 60-80kHz to prepare spinning solution, performing wet spinning by using the spinning solution at the speed of 0.8mL/L to prepare composite fiber, and weaving the composite fiber to prepare the fiber framework.

Further, the molar ratio of the phenyl phosphoryl dichloride to the methyl chloride in the step A1 is 1:1, and the molar ratio of the piperazine to the intermediate 1 is 2: 1.

Further, the molar ratio of the intermediate 2 to the phosphorus oxychloride in the step A2 is 1:2, and the molar ratio of the intermediate 3, the p-hydroxybenzaldehyde, the aniline and the DOPO is 1:4:4: 4.

Further, the amount ratio of the intermediate 4, the N-bromosuccinimide, the benzoyl peroxide and the carbon tetrachloride in the step A3 is 0.2mol:0.2mol:0.3g:300mL, the amount ratio of the intermediate 1, the potassium carbonate, the deionized water and the tetraethylammonium bromide is 3.5g:9g:100mL:5mL, and the amount molar ratio of the intermediate 6 and the acrylic acid is 1: 1.

Further, the molar ratio of the epoxy resin E-51 and the acrylic acid in the step A4 is 1:1, and the mass ratio of the epoxy acrylic resin, the intermediate 7, the methyl methacrylate, the azobisisobutyronitrile and the benzoyl peroxide is 20:15:2:0.45: 0.3.

Further, the amount ratio of the modified resin, xylene and fiber bundle in the step A5 is 2g:15mL:1 g.

The invention has the beneficial effects that: the invention prepares a sound insulation material regenerated and manufactured by waste textiles, which is prepared by compounding a melting material and a fiber framework, wherein the melting material takes EVA resin as a base material, and glass fiber, nano silicon dioxide and calcium carbonate are added, so that the prepared sound insulation material has good sound insulation effect, meanwhile, aluminum hydroxide is added, so that the melting material has certain flame retardant effect, the fiber framework takes phenylphosphoryl dichloride as a raw material to react with monochloro methane to prepare an intermediate 1, then the intermediate 1 reacts with piperazine to prepare an intermediate 2, the intermediate 2 reacts with phosphorus oxychloride to prepare an intermediate 3, the intermediate 3 reacts with p-hydroxybenzaldehyde, then the intermediate 3 reacts with aniline and DOPO in sequence to prepare an intermediate 4, the intermediate 4 is treated with N-bromosuccinimide to prepare an intermediate 5, the intermediate 5 is further treated to prepare an intermediate 6, the preparation method comprises the steps of carrying out esterification reaction on an intermediate 6 and acrylic acid to obtain an intermediate 7, reacting epoxy resin E-51 with acrylic acid to obtain epoxy acrylic resin, polymerizing the epoxy acrylic resin with the intermediate 7 and methyl methacrylate to obtain modified resin, carrying out ultrasonic treatment on the modified resin and fiber bundles to obtain spinning solution, carrying out wet spinning on the spinning solution to obtain composite fibers, and weaving the composite fibers to obtain a fiber framework, wherein the fiber framework enhances the toughness of the sound insulation material, and is different from the traditional sound insulation flame retardant material which is not prepared by blending a flame retardant and a sound insulation material, so that the flame retardant components in the fiber framework are dispersed more uniformly, and can not fall off along with long-time use of the sound insulation material, and the flame retardant effect of the sound insulation material is further ensured.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

A sound insulation material made by regenerating waste textiles is prepared by compounding a melting material and a fiber framework;

the melting material comprises the following raw materials in parts by weight: 100 parts of EVA resin, 30 parts of glass fiber, 10 parts of nano silicon dioxide, 10 parts of calcium carbonate and 40 parts of aluminum hydroxide;

the sound insulation material is prepared by the following steps:

step S1: weighing the raw materials, adding the raw materials into a double-screw extruder, and performing melt extrusion at the temperature of 150 ℃ to prepare a molten material;

step S2: and (3) putting the fiber framework into a grinding tool, adding the molten material until the molten material completely wraps the fiber framework, pressing and cooling to obtain the sound insulation material.

The fiber skeleton is prepared by the following steps:

step A1: dispersing phenyl phosphoryl dichloride in tetrahydrofuran, adding liquid methane chloride and aluminum chloride, performing reflux reaction for 3 hours at the rotation speed of 150r/min and the temperature of 70 ℃ to obtain an intermediate 1, uniformly mixing piperazine and chloroform, stirring and adding triethylamine and the intermediate 1 at the rotation speed of 200r/min and the temperature of-5 ℃, reacting for 20 minutes, heating to 20 ℃, and continuing to react for 2 hours to obtain an intermediate 2;

step A2: dissolving the intermediate 2 in tetrahydrofuran, stirring and adding phosphorus oxychloride and triethylamine under the conditions that the rotating speed is 150r/min and the temperature is-5 ℃, reacting for 30min, heating to 70 ℃, performing reflux reaction for 10h to obtain an intermediate 3, uniformly mixing the intermediate 3, p-hydroxybenzaldehyde, triethylamine and tetrahydrofuran, performing reflux reaction for 20h at the temperature of 70 ℃, adding aniline, reacting for 15h at the temperature of 50 ℃, adding DOPO, heating to 70 ℃, and continuing to react for 10h to obtain an intermediate 4;

step A3: adding the intermediate 4, N-bromosuccinimide, benzoyl peroxide and carbon tetrachloride into a reaction kettle, reacting for 8 hours at the temperature of 80 ℃ to obtain an intermediate 5, adding the intermediate 5, potassium carbonate, deionized water and tetraethylammonium bromide into the reaction kettle, performing reflux reaction for 2 hours to obtain an intermediate 6, uniformly mixing the intermediate 6, acrylic acid, toluene and concentrated sulfuric acid, and performing reflux reaction for 8 hours at the temperature of 115 ℃ to obtain an intermediate 7;

step A4: dissolving epoxy resin E-51 in xylene, adding p-hydroxyanisole, stirring and adding acrylic acid and triethylamine under the conditions that the rotation speed is 150r/min and the temperature is 85 ℃, reacting for 4 hours to obtain epoxy acrylic resin, adding the epoxy acrylic resin, an intermediate 7, methyl methacrylate and the xylene into a reaction kettle, stirring and adding azobisisobutyronitrile under the conditions that the rotation speed is 150r/min and the temperature is 100 ℃, reacting for 1 hour, adding benzoyl peroxide, and continuing to react for 2 hours to obtain modified resin;

step A5: dissolving modified resin in xylene, adding fiber bundle, performing ultrasonic treatment for 2h under the condition of frequency of 60kHz to prepare spinning solution, performing wet spinning by using the spinning solution at the speed of 0.8mL/L to prepare composite fiber, and weaving the composite fiber to prepare a fiber framework.

The fiber bundle is prepared by the following steps:

step B1: soaking the waste textiles in a sodium hydroxide solution with the mass fraction of 30% for 20min, then passing through clear water, then soaking in a sodium chloride solution with the mass fraction of 20% for 20min, and then passing through clear water to obtain pretreated textiles;

step B2: cutting and dry tearing the pretreated textile, loosening and opening to form regenerated cotton, and drawing into fiber bundles.

Example 2

A sound insulation material made by regenerating waste textiles is prepared by compounding a melting material and a fiber framework;

the melting material comprises the following raw materials in parts by weight: 110 parts of EVA resin, 40 parts of glass fiber, 13 parts of nano silicon dioxide, 13 parts of calcium carbonate and 45 parts of aluminum hydroxide;

the sound insulation material is prepared by the following steps:

step S1: weighing the raw materials, adding the raw materials into a double-screw extruder, and performing melt extrusion at the temperature of 155 ℃ to prepare a molten material;

step S2: and (3) putting the fiber framework into a grinding tool, adding the molten material until the molten material completely wraps the fiber framework, pressing and cooling to obtain the sound insulation material.

The fiber skeleton is prepared by the following steps:

step A1: dispersing phenyl phosphoryl dichloride in tetrahydrofuran, adding liquid methane chloride and aluminum chloride, performing reflux reaction for 4 hours at the rotation speed of 180r/min and the temperature of 73 ℃ to obtain an intermediate 1, uniformly mixing piperazine and chloroform, stirring and adding triethylamine and the intermediate 1 at the rotation speed of 300r/min and the temperature of-3 ℃, reacting for 25 minutes, heating to 25 ℃, and continuing to react for 2.5 hours to obtain an intermediate 2;

step A2: dissolving the intermediate 2 in tetrahydrofuran, stirring and adding phosphorus oxychloride and triethylamine under the conditions that the rotating speed is 180r/min and the temperature is-3 ℃, reacting for 35min, heating to 73 ℃, performing reflux reaction for 13h to obtain an intermediate 3, uniformly mixing the intermediate 3, p-hydroxybenzaldehyde, triethylamine and tetrahydrofuran, performing reflux reaction for 23h at the temperature of 75 ℃, adding aniline, reacting for 18h at the temperature of 55 ℃, adding DOPO, heating to 75 ℃, and continuing to react for 13h to obtain an intermediate 4;

step A3: adding the intermediate 4, N-bromosuccinimide, benzoyl peroxide and carbon tetrachloride into a reaction kettle, reacting for 9 hours at 85 ℃ to obtain an intermediate 5, adding the intermediate 5, potassium carbonate, deionized water and tetraethylammonium bromide into the reaction kettle, performing reflux reaction for 2.5 hours to obtain an intermediate 6, uniformly mixing the intermediate 6, acrylic acid, toluene and concentrated sulfuric acid, and performing reflux reaction for 9 hours at 118 ℃ to obtain an intermediate 7;

step A4: dissolving epoxy resin E-51 in xylene, adding p-hydroxyanisole, stirring and adding acrylic acid and triethylamine under the conditions that the rotation speed is 180r/min and the temperature is 90 ℃ to react for 5 hours to obtain epoxy acrylic resin, adding the epoxy acrylic resin, an intermediate 7, methyl methacrylate and the xylene into a reaction kettle, stirring and adding azobisisobutyronitrile under the conditions that the rotation speed is 180r/min and the temperature is 105 ℃ to react for 1.5 hours, adding benzoyl peroxide, and continuing to react for 2.5 hours to obtain modified resin;

step A5: dissolving modified resin in xylene, adding fiber bundle, performing ultrasonic treatment for 3h under the condition of 70kHz frequency to prepare spinning solution, performing wet spinning by using the spinning solution at the speed of 0.8mL/L to prepare composite fiber, and weaving the composite fiber to prepare a fiber framework.

The fiber bundle is prepared by the following steps:

step B1: soaking the waste textiles in a sodium hydroxide solution with the mass fraction of 30% for 25min, then passing through clear water, then soaking in a sodium chloride solution with the mass fraction of 20% for 25min, and then passing through clear water to obtain pretreated textiles;

step B2: cutting and dry tearing the pretreated textile, loosening and opening to form regenerated cotton, and drawing into fiber bundles.

Example 3

A sound insulation material made by regenerating waste textiles is prepared by compounding a melting material and a fiber framework;

the melting material comprises the following raw materials in parts by weight: 120 parts of EVA resin, 50 parts of glass fiber, 15 parts of nano silicon dioxide, 15 parts of calcium carbonate and 50 parts of aluminum hydroxide;

the sound insulation material is prepared by the following steps:

step S1: weighing the raw materials, adding the raw materials into a double-screw extruder, and performing melt extrusion at the temperature of 160 ℃ to prepare a molten material;

step S2: and (3) putting the fiber framework into a grinding tool, adding the molten material until the molten material completely wraps the fiber framework, pressing and cooling to obtain the sound insulation material.

The fiber skeleton is prepared by the following steps:

step A1: dispersing phenyl phosphoryl dichloride in tetrahydrofuran, adding liquid methane chloride and aluminum chloride, performing reflux reaction for 5 hours at the rotation speed of 200r/min and the temperature of 75 ℃ to obtain an intermediate 1, uniformly mixing piperazine and chloroform, stirring and adding triethylamine and the intermediate 1 at the rotation speed of 300r/min and the temperature of 0 ℃, reacting for 30 minutes, heating to 30 ℃, and continuing to react for 3 hours to obtain an intermediate 2;

step A2: dissolving the intermediate 2 in tetrahydrofuran, stirring and adding phosphorus oxychloride and triethylamine under the conditions that the rotating speed is 200r/min and the temperature is 0 ℃, reacting for 40min, heating to 75 ℃, performing reflux reaction for 15h to obtain an intermediate 3, uniformly mixing the intermediate 3, p-hydroxybenzaldehyde, triethylamine and tetrahydrofuran, performing reflux reaction for 25h at the temperature of 80 ℃, adding aniline, reacting for 20h at the temperature of 60 ℃, adding DOPO, heating to 80 ℃, and continuing to react for 15h to obtain an intermediate 4;

step A3: adding the intermediate 4, N-bromosuccinimide, benzoyl peroxide and carbon tetrachloride into a reaction kettle, reacting for 10 hours at the temperature of 90 ℃ to obtain an intermediate 5, adding the intermediate 5, potassium carbonate, deionized water and tetraethylammonium bromide into the reaction kettle, performing reflux reaction for 3 hours to obtain an intermediate 6, uniformly mixing the intermediate 6, acrylic acid, toluene and concentrated sulfuric acid, and performing reflux reaction for 10 hours at the temperature of 120 ℃ to obtain an intermediate 7;

step A4: dissolving epoxy resin E-51 in xylene, adding p-hydroxyanisole, stirring and adding acrylic acid and triethylamine under the conditions that the rotation speed is 200r/min and the temperature is 95 ℃, reacting for 6 hours to obtain epoxy acrylic resin, adding the epoxy acrylic resin, an intermediate 7, methyl methacrylate and the xylene into a reaction kettle, stirring and adding azobisisobutyronitrile under the conditions that the rotation speed is 200r/min and the temperature is 110 ℃, reacting for 2 hours, adding benzoyl peroxide, and continuing to react for 3 hours to obtain modified resin;

step A5: dissolving modified resin in dimethylbenzene, adding fiber bundles, performing ultrasonic treatment for 4 hours under the condition of 80kHz frequency to prepare spinning solution, performing wet spinning by using the spinning solution at the speed of 0.8mL/L to prepare composite fiber, and weaving the composite fiber to prepare a fiber framework.

The fiber bundle is prepared by the following steps:

step B1: soaking the waste textiles in a sodium hydroxide solution with the mass fraction of 30% for 30min, then passing through clear water, then soaking in a sodium chloride solution with the mass fraction of 20% for 30min, and then passing through clear water to obtain pretreated textiles;

step B2: cutting and dry tearing the pretreated textile, loosening and opening to form regenerated cotton, and drawing into fiber bundles.

Comparative example 1

In this comparative example, compared with example 1, the fiber skeleton was not used, and the molten material was directly subjected to press cooling.

Comparative example 2

This comparative example is a sound insulating material disclosed in chinese patent CN 111362237A.

Comparative example 3

This comparative example is a sound insulating material disclosed in chinese patent CN 109880269A.

The soundproof materials prepared in examples 1 to 3 and comparative examples 1 to 3 were tested for flexural strength in accordance with GB/T9341-2008 and flame retardant effect in accordance with UL94HB, and the results are shown in the following tables;

as can be seen from the above table, the sound-insulating materials obtained in examples 1 to 3 had a flexural strength of 113.9 to 118.2MPa, a flame-retardant rating of V0, and a smoke generation rate of 0.128 to 0.132m²/s²After the flame retardant is used for 6 months, the flame retardant grade does not decline, and simultaneously, the phenomenon of particle shedding does not occur, which shows that the flame retardant has good mechanical property and flame retardant effect.

The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.