Artificial spinning thermal fabric and preparation method thereof

Abstract

The invention discloses an artificial spinning thermal fabric and a preparation method thereof. The thermal fabric comprises the following raw materials: a thermoplastic high polymer and an aerogel additive, the raw materials of the thermoplastic high polymer comprise a polyurethane elastomer composite material and a modified glass fiber material; the aerogel additive comprises modified silicon dioxide aerogel; the thermoplastic high polymer and the aerogel additive are blended to obtain a spinning solution, and the warm-keeping fabric of the composite fibers is prepared through wet spinning in combination with a freeze-drying technology. The artificial spinning warm-keeping fabric obtained through the preparation method is used for improving the warm-keeping effect of the artificial spinning warm-keeping fabric, and meanwhile the warm-keeping effect of the warm-keeping fabric can be maintained and improved.

Description

Technical Field

[0001] The invention relates to the technical field of thermal insulation fabrics, in particular to an artificial spun thermal insulation fabric and a preparation method thereof. Background Art

[0002] Clothes have been around since the early days of human society, when ancient people made crude "clothes" out of some materials and wore them. The earliest clothes were mostly made of animal skins, while the earliest "fabrics" used to wrap the body were made of fibers such as hemp and grass. Clothes, as a protective barrier between the human body and the external environment, are of great significance and importance for personal thermal comfort regulation, and are also one of the basic conditions for human survival.

[0003] Currently, textiles and clothing are able to provide human thermal regulation functions by integrating advanced composite materials and special structures, so functional clothing based on advanced materials such as thermal conductive composite materials plays an increasingly important role in personal thermal management. When wearing clothes, an internal microclimate zone is formed between the human body and the clothes, and the clothes act as a barrier between the internal microclimate and the surrounding environment. When the human body wears and touches the clothes, heat is transmitted through the fibers and air embedded between the body and the environment by thermal conduction.

[0004] Nowadays, ultrafine fibers, hollow fibers, and aerogel fibers all achieve high thermal insulation performance with high porosity, light weight, and large surface area. Among them, oxide aerogel, silica aerogel, and cellulose fiber are considered to be more promising options that can provide better thermal insulation performance. However, due to the pores in the aerogel fiber, the thermal insulation performance will be reduced during multiple washing processes. In order to improve the thermal insulation performance of artificial spinning thermal insulation fabrics and their long-term thermal insulation performance, this application provides a solution. Summary of the invention

[0005] The present application provides a man-made spun thermal insulation fabric and a preparation method thereof, which are used to improve the thermal insulation effect of the man-made spun thermal insulation fabric and can maintain the improved thermal insulation effect of the thermal insulation fabric.

[0006] The present application provides an artificial spun thermal insulation fabric, wherein the raw materials of the thermal insulation fabric include a thermoplastic polymer and an aerogel additive; the raw materials of the thermoplastic polymer include a polyurethane elastomer composite material and a modified glass fiber material; the aerogel additive includes a modified silica aerogel; the thermoplastic polymer and the aerogel additive are blended to obtain a spinning solution, and the thermal insulation fabric of the composite fiber is prepared by wet spinning combined with freeze-drying technology.

[0007] Preferably, the materials involved in the synthesis process of the polyurethane elastomer composite material include tetrahydrofuran homopolyether, 4,4'-dicyclohexylmethane diisocyanate, dibutyltin dilaurate and N,N-dimethylformamide.

[0008] Preferably, the modified glass fiber material is prepared by modifying glass fiber using a silane coupling agent.

[0009] Preferably, the raw materials used in the synthesis process of the modified silica aerogel include ethyl silicate and (3-mercaptopropyl)trimethoxysilane.

[0010] On the other hand, the present application discloses a method for preparing a thermal insulation fabric by artificial spinning, comprising the following steps: synthesizing a thermoplastic polymer, synthesizing a modified silica aerogel, synthesizing an artificial spinning solution, and preparing the thermal insulation fabric by wet spinning.

[0011] Preferably, the thermoplastic polymer synthesis step includes the following three steps: S1, synthesis of polyurethane elastomer composite material: dehydrating a certain amount of tetrahydrofuran homopolyether under vacuum at a certain temperature for a certain period of time, then adding a certain proportion of 4,4'-dicyclohexylmethane diisocyanate, dibutyltin dilaurate and N,N-dimethylformamide in sequence, stirring at a certain temperature for a certain period of time, to obtain a prepolymer of polyurethane elastomer composite material; S2, preparation of modified glass fiber material: first dissolving a certain proportion of silane coupling agent in anhydrous ethyl acetate, and ...silane coupling agent in anhydrous ethyl acetate, and then adding a certain proportion of 4,4'-dicyclohexylmethane diisocyanate, dibutyltin dilaurate and N,N-dimethylformamide in sequence, and stirring at a certain temperature for a certain period of time, to obtain a prepolymer of polyurethane elastomer composite material; S3, preparation of thermoplastic polymer: a certain amount of the modified glass fiber material is dispersed and dissolved in N, N-dimethylformamide solvent, and mixed with a certain amount of prepolymer of the polyurethane elastomer composite material, and after ultrasonication at room temperature for a certain time, 1,4-butanediol is dripped into the solution to obtain a thermoplastic polymer.

[0012] Preferably, in the synthesis of the modified silica aerogel: ethyl silicate is dissolved in ethanol, and a silane coupling agent of (3-mercaptopropyl)trimethoxysilane is added dropwise while stirring, and the pH value is adjusted to a certain value, stirred and heated to a certain temperature for a certain time, and then a certain concentration of ammonia water is added to the solution and stirred until the solution gelates; and then immersed in ethanol, aged at a certain temperature for a certain time, and exchanged with ethanol and n-hexane at the same time, excess water and excess organic solvent are removed, and finally dried at a certain temperature to obtain the modified silica aerogel.

[0013] Preferably, in the synthesis process of the artificial spinning solution: the thermoplastic polymer is dissolved in an N,N-dimethylformamide solvent, stirred at a certain temperature until the thermoplastic polymer is completely dissolved, then ultrasonicated for a certain time, and the thermoplastic polymer is defoamed under a certain vacuum degree, so as to obtain a thermoplastic polymer spinning solution with a certain mass fraction; a certain amount of the modified silica aerogel particles are weighed and put into an N,N-dimethylformamide solvent, stirred at a certain temperature for a certain time, ultrasonicated for a certain time after the modified silica aerogel is evenly dispersed, to obtain a modified silica aerogel solution with a certain mass fraction, and a certain mass fraction of the thermoplastic polymer spinning solution is added to mix, stirred and dissolved at a certain temperature, and ultrasonicated for a certain time after it is completely dissolved, to obtain an artificial spinning solution; Preferably, in the process of preparing thermal insulation fabric by wet spinning: the artificial spinning solution is ultrasonically defoamed, parameters are set by wet spinning equipment, and artificial fibers are spun to obtain artificial spinning fibers; a certain mass fraction of tert-butyl alcohol aqueous solution is added to the artificial spinning fibers for solvent exchange, and the artificial spinning fibers are then placed in a freezing environment at a certain temperature for a certain period of time, and then placed in a freeze dryer for a certain period of time, and the post-treated artificial spinning fibers are woven to obtain thermal insulation fabric.

[0014] Preferably, in the step of synthesizing the thermoplastic polymer, the weight ratio of the modified glass fiber material to the prepolymer of the polyurethane elastomer composite material is 1-3:3-5; in the step of synthesizing the artificial spinning solution, the mass fraction ratio of the thermoplastic polymer spinning solution to the modified silica aerogel solution is 1-5:5-10.

[0015] One or more technical solutions provided in this application have at least the following technical effects or advantages: 1. The present application adopts silica aerogel as the raw material of the spinning solution, wherein the silica aerogel has the effects of high porosity, low density, large specific surface area and low thermal conductivity. The present application modifies the aerogel by adding a silane coupling agent of (3-mercaptopropyl)trimethoxysilane, so that the aerogel exhibits super heat resistance and adhesion to thermoplastic polymers, thereby improving the maintenance of the warmth retention effect.

[0016] 2. The present application uses a silane coupling agent to modify the glass fiber material, and obtains a spinning solution by blending the modified glass fiber with a thermoplastic polymer, wherein the modification of the glass fiber can improve the brittleness of the silica aerogel, so that the artificial fiber obtained by blending the silica aerogel and the thermoplastic polymer has good mechanical properties.

[0017] 3. The present application adopts wet spinning, which has many advantages such as structural control, good material compatibility, uniform fiber structure, simple and stable process, batch preparation, and controllable fiber diameter. At the same time, the present application also adopts freeze drying. During the entire freeze drying process, the present application replaces the water in the solution with tert-butyl alcohol, inhibits the sharp ice crystals in the network structure of the polymer, and protects the continuous network structure of the silica aerogel composite fiber, thereby improving the warmth effect of the artificial spinning thermal insulation fabric. DETAILED DESCRIPTION

[0018] The present application provides a man-made spun thermal insulation fabric and a preparation method thereof, which are used to improve the thermal insulation effect of the man-made spun thermal insulation fabric and can maintain the improved thermal insulation effect of the thermal insulation fabric.

[0019] The following will be combined with the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0020] It should be noted that the terms "first", "second", etc. in the specification of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or server comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or modules that are not clearly listed or inherent to these processes, methods, products or devices.

[0021] raw material: Tetrahydrofuran homopolyether CAS No.: 25190-06-1 Molecular weight: 146.227 Purity 99.0% Dicyclohexylmethane diisocyanate CAS number: 5124-30-1 Molecular weight: 262.347 Purity 90.0% Dibutyltin dilaurate CAS No.: 105124-36-5 Molecular weight: 233.306 Purity: 90.0% N,N-Dimethylformamide CAS No.: 68-12-2 Molecular weight: 73.094 Purity 99.0% Ethyl silicate CAS No.: 1109-96-2 Molecular weight: 520.661 Purity 99.0% (3-Mercaptopropyl)trimethoxysilane CAS No.: 4420-74-0 Molecular weight: 196.340 Purity: 99.0% Tert-Butanol CAS No.: 75-65-0 Molecular weight: 74.122 Purity 99.0% Glass fiber CAS number: 65997-17-3 Molecular weight: 158.039 Purity 99.0% Example Example 1

[0022] S1. Synthesis of polyurethane elastomer composite material: dehydrate 1.0 kg of tetrahydrofuran homopolyether under vacuum at 110° C. for 3 h, then add 0.2 kg of 4,4'-dicyclohexylmethane diisocyanate, 0.3 kg of dibutyltin dilaurate and 1 kg of N,N-dimethylformamide in sequence, and stir at 75° C. for 3 h to obtain a prepolymer of the polyurethane elastomer composite material.

[0023] S2. Preparation of modified glass fiber material: first, 0.5 kg of silane coupling agent (vinyl triethoxysilane is used in the embodiment of the present application) is dissolved in anhydrous ethanol, stirred for 2 hours, and then 1.5 kg of glass fiber particles are added to the mixed solution, and then ultrasonicated at room temperature for 1 hour, washed with anhydrous ethanol, and then dried in an oven at 100° C. for 5 hours to obtain a modified glass fiber material; S3. Preparation of thermoplastic polymer: 0.1 kg of modified glass fiber material is dispersed and dissolved in N,N-dimethylformamide solvent, and mixed with 1 kg of prepolymer of polyurethane elastomer composite material. After ultrasonication at room temperature for a certain period of time, 1,4-butanediol is dropped into the solution to obtain a thermoplastic polymer.

[0024] S4. Synthesis of modified silica aerogel: 1 kg of ethyl silicate was dissolved in ethanol, and 0.1 kg of (3-mercaptopropyl)trimethoxysilane silane coupling agent was added dropwise while stirring, and the pH value was adjusted to 3.0 with hydrochloric acid solution. The mixture was stirred and heated to 60°C for reaction for 2 hours, and then 50 g of 1 mol / L ammonia water was added to the solution and stirred until the solution gelled; the solution was immersed in ethanol and aged at 50°C for 24 hours, and then exchanged with ethanol and n-hexane, first exchanged with ethanol 6 times, and then exchanged with n-hexane 6 times, to remove excess water and excess organic solvent, and finally dried at 50°C to obtain modified silica aerogel.

[0025] S5. Synthesis of artificial spinning solution: 1 kg of thermoplastic polymer is dissolved in N,N-dimethylformamide solvent, stirred at 80°C until the thermoplastic polymer is completely dissolved, then ultrasonicated for 0.5 h, and the thermoplastic polymer is defoamed at 0.03 MPa to obtain a thermoplastic polymer spinning solution with a mass fraction of 10 wt%; 1 kg of modified silica aerogel particles is weighed and put into N,N-dimethylformamide solvent, stirred at 30°C for 3 h, and ultrasonicated for 0.5 h after the modified silica aerogel is evenly dispersed to obtain a modified silica aerogel solution with a mass fraction of 10 wt%; 1 kg of 10 wt% modified silica aerogel solution is mixed with 10 wt% thermoplastic polymer spinning solution, stirred and dissolved at 80°C, and ultrasonicated for 0.5 h after complete dissolution to obtain an artificial spinning solution; S6. Preparation of thermal insulation fabric by wet spinning: the artificial spinning solution is maintained for ultrasonic defoaming, and the parameters are set by the wet spinning equipment. The injector speed of the wet spinning equipment is 0.25 ml / min; the collecting speed is 0.03 m / s, and the artificial fiber is spun to obtain the artificial spinning fiber; a 20 wt % aqueous solution of tert-butanol is added to the artificial spinning fiber for solvent exchange, and the artificial spinning fiber is placed in a freezing environment at -70°C for 5 hours and then placed in a freeze dryer, and then freeze-dried at -70°C for 24 hours, and the post-treated artificial spinning fiber is woven to obtain the thermal insulation fabric.

[0026] Embodiment 2-5 The difference between Examples 2-5 and Example 1 is that the mass fractions of the thermoplastic polymer spinning solution and the modified silica aerogel solution under the same mass are different. The corresponding data are summarized in Table 1 below.

[0027] Table 1, composition ratio of Examples 1-5

[0028] Comparative Example Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that, in the synthesis of the modified silica aerogel, (3-mercaptopropyl)trimethoxysilane is not used as a silane coupling agent to modify the silica aerogel.

[0029] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is that, in the preparation of the modified glass fiber material, vinyl triethoxysilane is not used as a silane coupling agent to modify the glass fiber material.

[0030] Comparative Example 3 The difference between Comparative Example 3 and Example 1 is that, during the synthesis of the artificial spinning solution, no modified glass fiber material or modified glass fiber material is added.

[0031] Comparative Example 4 The difference between Comparative Example 4 and Example 1 is that, in the process of preparing the thermal insulation fabric by wet spinning, freeze drying is used to treat the artificial spinning fiber, but tert-butyl alcohol is not used as solvent exchange.

[0032] Performance testing In order to further study the effects of various components and preparation parameters on the thermal insulation fabrics of artificial spinning, the present application further carries out the following examples for verification.

[0033] According to Examples 1-5 and Comparative Examples 1-4, the thermal insulation performance, heat transfer performance and surface degree of the fabric after washing of the artificial spinning thermal insulation fabrics prepared in each Example and each Comparative Example were tested. Among them, the thermal insulation fabric was washed according to the method in GB / T8629-2017 "Household Washing and Drying Procedure for Textile Testing", the washing degree was 5N, and it was washed 0, 50, 100, and 200 times respectively, and the washed thermal insulation fabric was dried and placed in an environment of 25°C and a relative humidity of 70% for 24 hours, and the thermal insulation performance, heat transfer performance and surface degree of the fabric after washing were tested.

[0034] 1. Thermal insulation performance test: The test is carried out in accordance with GB / T11048-2009 "Test method for thermal insulation performance of textiles". The flat plate constant temperature difference heat dissipation method is adopted to calculate the percentage of the difference between the heat dissipation when there is no sample and the heat dissipation when there is a sample and the ratio of the heat dissipation when there is no sample.

[0035] 2. Heat transfer performance test: GB / T35762-2017 "Textile Thermal Transfer Performance Test Method Flat Plate Method" is used for testing to obtain the heat transfer coefficient.

[0036] 3. Fabric surface degree detection: Based on the analysis of the surface degree of the fabric after home washing, it generally includes the following conditions: whether the surface is damaged, whether there is pilling, whether the yarn is knotted, broken, or skipped, and rating is based on the degree.

[0037] Table 2, Performance test table of Examples 1-5 and Comparative Examples 1-4

[0038] Thermal insulation performance test: the unit is H thermal insulation rate / %; Heat transfer performance test: The unit is U heat transfer coefficient / (w / m 2 *℃) Fabric surface level detection: -: The fabric has no obvious damage or pilling; the yarn has no obvious knots, breaks or skips; +: The fabric is obviously damaged and pilling; the yarn is obviously knotted, broken, or skipped; *: The fabric is severely damaged and pilling; the yarn is severely knotted, broken, or skipped.

[0039] Conclusion Analysis According to the analysis of Examples 1-5 and Comparative Example 1, it can be obtained that when (3-mercaptopropyl) trimethoxysilane is used as a silane coupling agent to modify the silica aerogel during the synthesis of the modified silica aerogel, the thermal insulation performance and heat transfer function of the artificial spinning thermal insulation fabric can be effectively improved. And because the silane coupling agent (3-mercaptopropyl) trimethoxysilane is added for modification, the aerogel exhibits super heat resistance and adhesion to thermoplastic polymers, thereby improving the maintenance of the thermal insulation effect. Therefore, in the comparative example, the absence of (3-mercaptopropyl) trimethoxysilane will greatly reduce its thermal insulation effect after multiple washings; and it will also affect the surface degree of the fabric and cause damage.

[0040] In addition, combined with the analysis between comparative example 2 and examples 1-4, the use of vinyl triethoxysilane as a silane coupling agent to modify the glass fiber material can improve the surface quality of its fabric. In examples 1-4, after up to 100 washes, there was no obvious damage or fuzzing on the artificial spun thermal insulation fabric, and there was no obvious knotting, breaking, or skipping on the yarn; although after up to 200 washes, there was also obvious damage and fuzzing; the yarn had obvious knotting, breaking, and skipping, but compared with the comparative example, there was also a significant improvement.

[0041] In addition, in Comparative Example 3, no modified glass fiber material or modified glass fiber material was added during the synthesis process of the artificial spinning solution. It not only has improvements in thermal insulation performance and heat transfer function, but also, because the modification of glass fiber can improve the brittleness of silica aerogel, the artificial fiber obtained by blending silica aerogel and thermoplastic polymer has good mechanical properties. Without adding any modified glass fiber material or modified glass fiber material, the surface of the fabric will be damaged after washing.

[0042] In Comparative Example 4, in the process of preparing thermal insulation fabrics by wet spinning, freeze-drying was not used to treat the artificial spun fibers; compared with Examples 1-4, the thermal insulation performance and heat transfer function were reduced. This is because the water in the solution was replaced by tert-butanol, which suppressed the sharp ice crystals in the network structure of the polymer and protected the continuous network structure of the silica aerogel composite fiber, thereby improving the thermal insulation effect of the artificial spun thermal insulation fabric.

[0043] It should be noted that the above-mentioned sequence of the embodiments of the present application is only for description and does not represent the advantages and disadvantages of the embodiments. And the above-mentioned specific embodiments of this specification are described. Other embodiments are within the scope of the attached claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0044] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application. This specification is only an exemplary description of the present application and is deemed to have covered any and all modifications, changes, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the present application and its equivalent technologies, the present application is intended to include these modifications and variations.

Claims

1. A synthetic spun thermal insulation fabric, characterized in that: The raw materials of the thermal insulation fabric include thermoplastic polymer and aerogel additive; The raw materials of the thermoplastic polymer include polyurethane elastomer composite materials and modified glass fiber materials; The aerogel additive includes modified silica aerogel; The thermoplastic polymer and the aerogel additive are blended to obtain a spinning solution, and a composite fiber thermal insulation fabric is prepared by wet spinning combined with freeze drying technology.

2. A synthetic spun thermal insulation fabric as claimed in claim 1, characterized in that: The materials involved in the synthesis process of the polyurethane elastomer composite material include tetrahydrofuran homopolyether, 4,4'-dicyclohexylmethane diisocyanate, dibutyltin dilaurate and N,N-dimethylformamide.

3. The artificial spun thermal insulation fabric according to claim 1, characterized in that: The modified glass fiber material adopts a silane coupling agent to modify the glass fiber.

4. The artificial spun thermal insulation fabric according to claim 1, characterized in that: The raw materials used in the synthesis of the modified silica aerogel include ethyl silicate and (3-mercaptopropyl)trimethoxysilane.

5. A method for preparing the artificial spinning thermal insulation fabric according to any one of claims 1 to 4, characterized in that: The following steps are involved: Synthesis of thermoplastic polymers, synthesis of modified silica aerogels, synthesis of artificial spinning solutions, and preparation of thermal insulation fabrics by wet spinning.

6. The method for preparing a synthetic spun thermal insulation fabric according to claim 5, characterized in that: In the thermoplastic polymer synthesis step, the following three steps are included: S1. Synthesis of polyurethane elastomer composite material: dehydrate a certain amount of tetrahydrofuran homopolyether under vacuum at a certain temperature for a certain period of time, then add a certain proportion of 4,4'-dicyclohexylmethane diisocyanate, dibutyltin dilaurate and N,N-dimethylformamide in sequence, stir at a certain temperature for a certain period of time, and obtain a prepolymer of polyurethane elastomer composite material; S2. Preparation of modified glass fiber material: firstly dissolve a certain proportion of silane coupling agent in anhydrous ethanol, stir for a certain time, then add glass fiber particles into the mixed solution, wash with ethanol after ultrasonic treatment at room temperature for a certain time, and then dry in an oven at a certain temperature for a certain time to obtain the modified glass fiber material; S3. Preparation of thermoplastic polymer: dispersing and dissolving a certain amount of the modified glass fiber material in N,N-dimethylformamide solvent, and mixing with a certain amount of prepolymer of the polyurethane elastomer composite material, after ultrasonication at room temperature for a certain period of time, dripping 1,4-butanediol into the solution to obtain a thermoplastic polymer.

7. The method for preparing a synthetic spun thermal fabric according to claim 6, characterized in that: In the synthesis of the modified silica aerogel, ethyl silicate is dissolved in ethanol, and a silane coupling agent of (3-mercaptopropyl)trimethoxysilane is added dropwise while stirring, and the pH value is adjusted to a certain value, and the solution is stirred and heated to a certain temperature for a certain time, and then a certain concentration of ammonia water is added to the solution and stirred until the solution is gelled; and the solution is immersed in ethanol, aged at a certain temperature for a certain time, and exchanged with ethanol and n-hexane at the same time, and excess water and excess organic solvent are removed, and finally dried at a certain temperature to obtain the modified silica aerogel.

8. The method for preparing a synthetic spun thermal insulation fabric according to claim 7, characterized in that: In the synthesis process of the artificial spinning solution: the thermoplastic polymer is dissolved in an N,N-dimethylformamide solvent, stirred at a certain temperature until the thermoplastic polymer is completely dissolved, then ultrasonicated for a certain time, and the thermoplastic polymer is defoamed under a certain vacuum degree, so as to obtain a thermoplastic polymer spinning solution with a certain mass fraction; a certain amount of the modified silica aerogel particles are weighed and put into an N,N-dimethylformamide solvent, stirred at a certain temperature for a certain time, ultrasonicated for a certain time after the modified silica aerogel is evenly dispersed, to obtain a modified silica aerogel solution with a certain mass fraction, and a certain mass fraction of the thermoplastic polymer spinning solution is added and mixed, stirred and dissolved at a certain temperature, and ultrasonicated for a certain time after it is completely dissolved, to obtain an artificial spinning solution.

9. The method for preparing a synthetic spun thermal insulation fabric according to claim 8, characterized in that: In the process of preparing thermal insulation fabric by wet spinning: the artificial spinning solution is subjected to ultrasonic defoaming, parameters are set by wet spinning equipment, artificial fibers are spun to obtain artificial spinning fibers; a certain mass fraction of tert-butyl alcohol aqueous solution is added to the artificial spinning fibers to perform solvent exchange, the artificial spinning fibers are then placed in a freezing environment at a certain temperature for a certain period of time, and then placed in a freeze dryer for a certain period of time, and the post-treated artificial spinning fibers are woven to obtain thermal insulation fabric.

10. The method for preparing a synthetic spun thermal insulation fabric according to claim 9, characterized in that: In the step of synthesizing the thermoplastic polymer, the weight ratio of the modified glass fiber material to the prepolymer of the polyurethane elastomer composite material is 1-3:3-5; in the step of synthesizing the artificial spinning solution, the mass fraction ratio of the thermoplastic polymer spinning solution to the modified silica aerogel solution is 1-5:5-10.

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