Method for optimizing the production process of high-performance textile fibers

Abstract

The application provides a high-performance textile fiber preparation process optimization method, which comprises the following steps: placing graphene oxide in a quartz boat, feeding into a chemical vapor deposition furnace, feeding in high-purity argon, and then heating to 150 DEG C; feeding the vaporized pyrrole monomer into the chemical vapor deposition furnace for reaction for 2h to obtain a composite reactant. The high-performance textile fiber preparation process optimization method of the embodiment of the application realizes in-situ polymerization modification of the pyrrole monomer on the surface of the graphene oxide, combines with ultrasonic dispersion to scatter and refine filler particles, realizes uniform distribution of the filler in the polymer matrix, avoids defects such as uneven melt extrusion, jet blockage, broken filaments and hair filaments caused by filler agglomeration in the spinning process, and improves product quality. Meanwhile, the addition of a polyether-based elasticizer, polytetrafluoroethylene powder and polysulfone powder reduces the surface resistivity of the fiber and improves the long-acting antistatic performance of the fiber.

Description

Technical Field

[0001] This invention relates to the field of textile fiber technology, and in particular to an optimization method for the preparation process of high-performance textile fibers. Background Technology

[0002] Spandex fiber, scientifically known as polyurethane elastic fiber, is a high-elasticity synthetic fiber with excellent performance. Its molecules are composed of flexible soft segments and rigid hard segments, which can be stretched to several times the original length. After the external force is removed, it can quickly rebound and remain unchanged for a long time. It also has the characteristics of being lightweight, resistant to tensile fatigue, and highly adaptable. It is widely used in various textiles that require elasticity, such as swimwear, sportswear, underwear, and elastic jeans.

[0003] Most existing spandex fibers are prepared using conventional melt spinning processes. To improve the functionality of spandex fibers, functional fillers and modifying agents are often added to modify the spandex matrix and optimize the overall performance of the fiber. However, conventional functional fillers have poor compatibility with the spandex matrix, and the fillers are prone to agglomeration during the mixing and melting process, resulting in uneven distribution of components in the spinning melt. Furthermore, unreacted monomers and excess organic additives are easily left as contaminants during the process, which not only affect the purity of the fiber but also reduce its weather resistance. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the above-mentioned technologies.

[0005] Therefore, one objective of this invention is to propose an optimized method for the preparation of high-performance textile fibers, which can avoid process defects such as uneven melt extrusion, spinneret blockage, fiber breakage, and fuzz caused by filler agglomeration during spinning, thereby improving the quality and antistatic properties of the finished fiber.

[0006] To achieve the above objectives, the first aspect of this invention proposes an optimized method for preparing high-performance textile fibers, comprising the following steps: S1: Graphene oxide is placed in a quartz boat and fed into a chemical vapor deposition furnace. After introducing high-purity argon gas, the temperature is raised to 150°C, and the vaporized pyrrole monomer is fed into the chemical vapor deposition furnace for reaction for 2 hours to obtain a composite reactant; S2: The composite reactant and deionized water are fed into an ultrasonic disperser with an ultrasonic power of 2000W for 30 minutes to disperse the composite reactant in the aqueous phase to obtain a filler aqueous dispersion. The obtained dispersion is sent to a filtration device for solid-liquid separation, and pure water is recovered through evaporation and condensation processes; S3: Polytetrafluoroethylene micro powder and polysulfone micro powder are placed in a mixer, and pure argon gas is added... Water, 1500 rpm, mixed for 15 min to obtain a composite dispersed phase powder for later use; S4: Spandex chips were placed in a vacuum drying oven at 85℃ for 12 h. After drying, the spandex chips, composite dispersed phase powder, polyether elasticizer, and ionic antistatic polymer were placed in a twin-screw extruder. The temperature parameters of each section of the extruder were set as follows: feeding section 170℃, compression section 190℃, melting section 205℃, metering section 200℃, and screw speed 200 rpm. After melting, cooling, extrusion and pelletizing, modified spandex spinning chips were obtained; S5: The modified spandex spinning chips were fed into the hopper of a melt spinning machine and fed into the spinning machine for melt spinning to obtain antistatic modified spandex textile fibers.

[0007] In addition, the high-performance textile fiber preparation process optimization method proposed above according to the present invention may also have the following additional technical features:

[0008] Specifically, the vaporization temperature of the pyrrole monomer is 128–132°C.

[0009] Specifically, the graphene is sheet-like monolayer graphene oxide with a sheet diameter of 0.5 to 5 μm and an oxygen-containing functional group content of ≥20%. The graphene oxide is pretreated and dried under vacuum at 100°C for 4 hours before being placed into the quartz boat.

[0010] Specifically, the polytetrafluoroethylene micro powder has a particle size of 1 to 3 μm, and the polysulfone micro powder is an ultrafine homogeneous powder with a particle size of 2 to 5 μm.

[0011] Specifically, the ultrasonic disperser adopts an intermittent ultrasonic mode, and the temperature of the ultrasonic disperser is ≤30℃. The filtration device uses a 1μm filter membrane for solid-liquid separation.

[0012] Specifically, the vacuum degree of the vacuum drying oven is -0.09 to -0.095 MPa, and the moisture content of the spandex chips after drying is ≤0.05%.

[0013] Specifically, the raw materials are proportioned by mass as follows: 88-95 parts spandex chips, 2-4 parts composite dispersed phase powder, 1-3 parts polyether elasticizer, and 1-3 parts ionic antistatic polymer.

[0014] Specifically, the die head temperature of the twin-screw extruder is 200°C, and during the extrusion process, a vacuum exhaust device is activated between the compression section and the melting section of the twin-screw extruder, with a vacuum degree of -0.08MPa.

[0015] Specifically, the melt spinning temperature is controlled at 205-215℃, the spinneret length-to-diameter ratio is 2:1, room temperature side blowing cooling is adopted, the cooling wind speed is 0.4-0.6m / s, and the fiber stretch ratio is controlled at 4-6 times.

[0016] Specifically, the prepared modified spandex textile fiber has a surface resistivity of 10 to 10 Ω·cm, an elongation at break of ≥600%, and an elastic recovery rate of ≥95%, exhibiting excellent antistatic and mechanical elastic properties.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The optimized process for preparing high-performance textile fibers of the present invention modifies the pyrrole monomer by in-situ polymerization on the surface of graphene oxide, combined with ultrasonic dispersion to refine the filler particles, so that the filler is uniformly distributed in the polymer matrix, avoiding defects such as uneven melt extrusion, spinneret blockage, fiber breakage, and fuzz caused by filler agglomeration during spinning, thereby improving product quality. At the same time, the addition of polyether elasticizers, polytetrafluoroethylene micro powder and polysulfone micro powder reduces the surface resistivity of the fiber and improves the long-term antistatic properties of the fiber. Moreover, the polyether elasticizers can improve the flexibility and resilience of the spandex molecular chain, offsetting the disadvantages of increased fiber rigidity and decreased elasticity caused by inorganic filler doping, and ensuring the high elongation and high resilience characteristics of the fiber.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0020] Figure 1 This is a schematic diagram of a process optimization method for preparing high-performance textile fibers according to an embodiment of the present invention. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0022] The following describes an optimization method for the preparation process of high-performance textile fibers according to an embodiment of the present invention, with reference to the accompanying drawings.

[0023] like Figure 1 The present invention provides a technical solution:

[0024] Example 1

[0025] S1. Preparation of the composite reactant: Pretreated and dried monolayer graphene oxide was spread evenly in a quartz boat. The quartz boat was placed in a chemical vapor deposition furnace. After sealing the furnace, high-purity argon gas was introduced into the furnace and continuously purged for 15 minutes to remove air and water vapor. Next, the temperature inside the furnace was raised to 150°C, and vaporized pyrrole monomer, with its temperature stabilized at 128°C, was introduced into the furnace. The reaction was carried out at a constant temperature and pressure for 2 hours, allowing the pyrrole monomer to undergo in-situ polymerization on the surface of the graphene oxide. After the reaction was completed, the mixture was cooled to room temperature to obtain the composite reactant.

[0026] S2. Ultrasonic dispersion and purification: The composite reactants and deionized water are put into an ultrasonic disperser, the ultrasonic power is set to 2000W, the temperature of the dispersion system is controlled to be ≤30℃, and ultrasonic dispersion is continued for 30 minutes to obtain an aqueous dispersion of the filler. Further, the dispersion is sent to a filtration device for solid-liquid separation to retain trace agglomerated particles and impurities. Then, pure water is recovered through evaporation and condensation to realize the recycling of water resources and obtain high-purity refined composite filler.

[0027] S3. Preparation of dispersed phase powder: Take polytetrafluoroethylene micro powder with a particle size of 1-3 μm and polysulfone micro powder with a particle size of 2-5 μm according to the ratio and put them into a mixer. Add pure water and mix at 1500 rpm for 15 min to fully mix the polytetrafluoroethylene micro powder and polysulfone micro powder to obtain composite dispersed phase powder.

[0028] S4. Melt Granulation: Spandex chips are placed in a vacuum drying oven at 85℃ and a vacuum of -0.09MPa for 12 hours. After drying, the moisture content of the spandex chips is tested to be ≤0.05% to avoid bubble defects during melt spinning. The following raw materials are mixed according to the following mass ratio: 92 parts spandex chips, 3 parts composite dispersed phase powder, 2 parts polyether elasticizer, and 2 parts ionic antistatic polymer. The mixture is then fed into a twin-screw extruder. After melt plasticizing, homogenizing, and water cooling, the raw materials are extruded and granulated at a uniform speed to obtain modified spandex spun chips. Simultaneously, the process parameters for each section of the extruder are: feeding section 170℃, compression section 190℃, melting section 205℃, metering section 200℃, die head temperature 200℃, and screw speed 200rpm. A vacuum exhaust device is activated between the compression and melting sections, maintaining a vacuum of -0.08MPa to remove gases and trace impurities generated during the melting process.

[0029] S5. Melt spinning: The dried modified spandex spinning chips are fed into the hopper of the melt spinning machine using a screw feeder. The melt spinning temperature is controlled at 210℃. A standard spinneret with a length-to-diameter ratio of 2:1 is selected for melt extrusion spinning. The fiber is cooled by side blowing at room temperature with a cooling air velocity of 0.5m / s. Then, the fiber is stretched by a stretching ratio of 5 times. After stretching, the fiber is wound up and shaped to obtain high-performance antistatic modified spandex textile fiber.

[0030] Example 2

[0031] This embodiment is basically the same as the process steps in Embodiment 1, the difference being the proportion of raw material mass fractions and minor adjustments to some process parameters, as follows:

[0032] In this embodiment, the raw materials are formulated in the following proportions by mass: 95 parts spandex chips, 2 parts composite dispersed phase powder, 1 part polyether elasticizer, and 1 part ionic antistatic polymer.

[0033] The vaporization temperature of pyrrole monomer was set to 130℃, the vacuum degree of the vacuum drying oven was set to -0.095MPa, the melt spinning temperature was set to 205℃, the side-blowing cooling wind speed was 0.4m / s, the fiber stretching ratio was 4 times, and the remaining preparation steps were the same as in Example 1.

[0034] Example 3

[0035] This embodiment is basically the same as the process steps in Embodiment 1, the difference being the proportion of raw material mass fractions and minor adjustments to some process parameters, as follows:

[0036] In this embodiment, the raw materials are formulated in the following proportions by mass: 88 parts spandex chips, 4 parts composite dispersed phase powder, 3 parts polyether elasticizer, and 3 parts ionic antistatic polymer.

[0037] The vaporization temperature of pyrrole monomer was set to 132℃, the vacuum degree of the vacuum drying oven was set to -0.092MPa, the melt spinning temperature was set to 215℃, the side-blowing cooling wind speed was 0.6m / s, the fiber stretching ratio was 6 times, and the remaining preparation steps were the same as in Example 1.

[0038] In Example 2, by reducing the filler content and changing the stretching and cooling parameters, the high elasticity of the spandex matrix itself is ensured, making it suitable for close-fitting textile products that require high fabric resilience and softness.

[0039] Example 3 improved the antistatic effect of the fiber and the quality of the textile fabric by increasing the amount of antistatic functional filler and auxiliaries.

[0040] In summary, the optimized process for preparing high-performance textile fibers of this invention modifies pyrrole monomers through in-situ polymerization on the surface of graphene oxide, combined with ultrasonic dispersion to refine filler particles. This allows the filler to be uniformly distributed within the polymer matrix, avoiding defects such as uneven melt extrusion, spinneret blockage, fiber breakage, and fuzz caused by filler agglomeration during spinning, thus improving product quality. Simultaneously, the addition of polyether-based elasticizers, polytetrafluoroethylene micropowder, and polysulfone micropowder reduces the fiber surface resistivity, enhancing the fiber's long-term antistatic properties. Furthermore, the polyether-based elasticizers improve the flexibility and resilience of the spandex molecular chains, offsetting the increased fiber rigidity and decreased elasticity caused by inorganic filler doping, ensuring the fiber's high elongation and high resilience characteristics.

[0041] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0043] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for optimizing the preparation process of high-performance textile fibers, characterized in that, Includes the following steps: S1: Graphene oxide is placed in a quartz boat and sent into a chemical vapor deposition furnace. After high-purity argon gas is introduced, the temperature is raised to 150°C. The vaporized pyrrole monomer is sent into the chemical vapor deposition furnace to react for 2 hours to obtain the composite reactant. S2: Add the composite reactant and deionized water into an ultrasonic disperser with an ultrasonic power of 2000W for 30 minutes to disperse the composite reactant in the aqueous phase and obtain a filler aqueous dispersion. The obtained dispersion is sent to a filtration device for solid-liquid separation, and pure water is recovered through evaporation and condensation processes. S3: Place polytetrafluoroethylene micro powder and polysulfone micro powder in a mixer, add pure water, mix at 1500 rpm for 15 minutes to obtain a composite dispersed phase powder for later use. S4: Place the spandex chips in a vacuum drying oven at 85℃ for 12 hours. After drying, place the spandex chips, composite dispersed phase powder, polyether elasticizer, and ionic antistatic polymer in a twin-screw extruder. Set the temperature parameters of each section of the extruder to 170℃ for the feeding section, 190℃ for the compression section, 205℃ for the melting section, and 200℃ for the metering section. Set the screw speed to 200 rpm. After melting, cooling, extrusion, and pelletizing, modified spandex spinning chips are obtained. S5: The modified spandex spinning chips are fed into the hopper of the melt spinning machine and then fed into the spinning machine for melt spinning to obtain antistatic modified spandex textile fibers.

2. The method for optimizing the preparation process of high-performance textile fibers according to claim 1, characterized in that, The vaporization temperature of the pyrrole monomer is 128–132°C.

3. The method for optimizing the preparation process of high-performance textile fibers according to claim 2, characterized in that, The graphene is a sheet-like single-layer graphene oxide with a sheet diameter of 0.5-5 μm and an oxygen-containing functional group content of ≥20%. The graphene oxide is pretreated and dried under vacuum at 100°C for 4 hours before being placed into the quartz boat.

4. The method for optimizing the preparation process of high-performance textile fibers according to claim 3, characterized in that, The polytetrafluoroethylene micro powder has a particle size of 1–3 μm, and the polysulfone micro powder is an ultrafine homogeneous powder with a particle size of 2–5 μm.

5. The method for optimizing the preparation process of high-performance textile fibers according to claim 4, characterized in that, The ultrasonic disperser uses intermittent ultrasonic mode and the temperature of the ultrasonic disperser is ≤30℃. The filtration device uses a 1μm filter membrane for solid-liquid separation.

6. The method for optimizing the preparation process of high-performance textile fibers according to claim 5, characterized in that, The vacuum degree of the vacuum drying oven is -0.09 to -0.095 MPa, and the moisture content of the spandex chips after drying is ≤0.05%.

7. The method for optimizing the preparation process of high-performance textile fibers according to claim 6, characterized in that, The raw materials are proportioned by mass as follows: 88-95 parts spandex chips, 2-4 parts composite dispersed phase powder, 1-3 parts polyether elasticizer, and 1-3 parts ionic antistatic polymer.

8. The method for optimizing the preparation process of high-performance textile fibers according to claim 7, characterized in that, The die head temperature of the twin-screw extruder is 200℃, and during the extrusion process, a vacuum exhaust device is activated between the compression section and the melting section of the twin-screw extruder, with a vacuum degree of -0.08MPa.

9. The method for optimizing the preparation process of high-performance textile fibers according to claim 8, characterized in that, The melt spinning temperature is controlled at 205-215℃, the spinneret length-to-diameter ratio is 2:1, room temperature side blowing cooling is used, the cooling wind speed is 0.4-0.6m / s, and the fiber stretch ratio is controlled at 4-6 times.

10. The method for optimizing the preparation process of high-performance textile fibers according to claim 9, characterized in that, The modified spandex textile fiber prepared has a surface resistivity of 10 to 10 Ω·cm, an elongation at break of ≥600%, and an elastic recovery rate of ≥95%, exhibiting excellent antistatic and mechanical elastic properties.

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