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CN-122013506-A - Anti-ultraviolet nylon fabric and preparation method thereof

CN122013506ACN 122013506 ACN122013506 ACN 122013506ACN-122013506-A

Abstract

The invention relates to the technical field of nylon fabric, in particular to an anti-ultraviolet nylon fabric and a preparation method thereof, comprising the steps of obtaining composite functional master batch, and compositing ultraviolet response mesoporous titanium dioxide and nylon 6 to form the master batch with a core-shell structure through a reaction extrusion technology; performing fiber spinning, blending the composite functional master batch with nylon 66 slices, performing melt spinning, enabling mesoporous titanium dioxide to be arranged in the fibers in an oriented mode through electric field induction in the spinning process, constructing a bionic structure, performing vapor deposition treatment on the fiber fabric, constructing a multilayer shielding film formed by zinc oxide nano cones and silicon dioxide aerogel alternately on the surface of the fiber fabric, determining the protective performance, and testing the transmittance of the fabric in an ultraviolet band and the ultraviolet protection factor. According to the invention, through the synergistic effect of mesoporous titanium dioxide in directional arrangement in the fiber, the zinc oxide nano cone and the silicon dioxide aerogel layer in the multilayer shielding film, the protection efficiency and reliability of ultraviolet rays are improved.

Inventors

  • HUANG YUXIN

Assignees

  • 宜宾禾城纺织科技有限公司

Dates

Publication Date
20260512
Application Date
20260306

Claims (10)

  1. 1. The preparation method of the anti-ultraviolet nylon fabric is characterized by comprising the following steps of: Obtaining composite functional master batches, and compositing ultraviolet response mesoporous titanium dioxide and nylon 6 through a reaction extrusion technology to form master batches with a core-shell structure; Performing fiber spinning, namely blending the composite functional master batch with nylon 66 slices, performing melt spinning, and enabling mesoporous titanium dioxide to be arranged in the fiber in an oriented manner through electric field induction in the spinning process; Constructing a bionic structure, performing vapor deposition treatment on a fiber fabric, and constructing a multilayer shielding film consisting of zinc oxide nano cones and silicon dioxide aerogel alternately on the surface of the fiber fabric; And determining the protective performance, and testing the transmittance of the fabric in the ultraviolet wave band and the ultraviolet protection factor.
  2. 2. The preparation method of the anti-ultraviolet nylon fabric is characterized in that tetrabutyl titanate is used as a precursor in the preparation of the ultraviolet response type mesoporous titanium dioxide, mesoporous titanium dioxide with the aperture of 5-15nm is synthesized by a sol-gel method under the action of a template agent cetyl trimethyl ammonium bromide, and a benzotriazole ultraviolet absorber accounting for 30% -50% of the volume of a pore canal is loaded in the pore canal; The technological parameters of the reactive extrusion technology are that the temperature range of the twin-screw extruder is 220-250 ℃, the screw rotating speed is 200-400rpm, and the feeding rate is 10-20 kg/h.
  3. 3. The method for preparing the ultraviolet-resistant nylon fabric according to claim 1, wherein the electric field induced directional arrangement is that an alternating electric field with the frequency of 1-10kHz and the field strength of 0.5-2 kV/cm is applied before a melt passes through a spinneret plate, so that mesoporous titanium dioxide forms a chain-shaped arrangement structure along the direction of the electric field due to the dielectric property of the mesoporous titanium dioxide; The condition of vapor deposition treatment is that a zinc oxide nano cone array with the thickness of 50-200nm is deposited at the vacuum degree of 10-100 Pa and the substrate temperature of 80-120 ℃, and then a silicon dioxide aerogel layer with the thickness of 100-300nm is covered by chemical vapor deposition, and the process is circulated for 3-5 times.
  4. 4. The method for preparing the anti-ultraviolet nylon fabric according to claim 1, wherein, The test criteria for barrier properties included: The average transmittance of the tested fabric in the wave bands of UV-A of 315-400nm and UV-B of 280-315nm is not more than 2%; The UPF value of the fabric reaches more than 200, and the UPF retention rate is still not lower than 90% after 50 times of standard washing.
  5. 5. The preparation method of the anti-ultraviolet nylon fabric according to claim 2, wherein in the preparation process of the ultraviolet response type mesoporous titanium dioxide, the dosage of a template agent cetyl ammonium bromide is 10% -30% of the mass of tetrabutyl titanate, the pH value of a sol-gel reaction system is controlled between 2.0-4.5, the reaction temperature is maintained between 35-75 ℃, and the curing time is 10-40 hours; the loading of the benzotriazole ultraviolet absorbent is realized by a vacuum impregnation method, the impregnation pressure is 0.01-0.05MPa, the impregnation temperature is 60-90 ℃, and the impregnation time is 2-6 hours, so that the ultraviolet absorbent is ensured to be fully filled into the mesoporous pore canal.
  6. 6. The method for preparing the anti-ultraviolet nylon fabric according to claim 3, wherein in the electric field induced directional arrangement process, the waveform of the alternating electric field is one of square waves and sine waves, the electrode spacing is set to be 5-20 mm, and the action time of the electric field is controlled to be 0.5-3.0 seconds; The dielectric constant of the mesoporous titanium dioxide under the action of an electric field needs to reach 20-50, the volume fraction of the mesoporous titanium dioxide in the nylon matrix is 3% -8%, and the electric field parameters can enable the mesoporous titanium dioxide to finish directional assembly of a chain structure before melt cooling and solidification, so that a continuous ultraviolet shielding network is formed.
  7. 7. The method for preparing the anti-ultraviolet nylon fabric according to claim 3, wherein in the vapor deposition treatment, the growth of the zinc oxide nano cone array is realized by a hydrothermal method, the reaction solution is a mixed solution of zinc nitrate and hexamethylenetetramine, the concentration is 0.05-0.2 mol/L, the growth temperature is 80-95 ℃, and the growth time is 1-4 hours; The deposition of the silica aerogel layer adopts tetraethoxysilane as a precursor, the deposition rate is controlled to be 5-15nm/min, ammonia gas is introduced as a catalyst in the deposition process, and the porosity of the aerogel layer is kept at 85% -95%.
  8. 8. The method for preparing the anti-ultraviolet nylon fabric according to claim 4, wherein the standard washing condition is 4A type washing powder, the washing temperature is 30-50 ℃, the washing time is 20-40 minutes, and at least 3-8 samples at different positions are selected for measurement in the test process.
  9. 9. The preparation method of the ultraviolet-resistant nylon fabric applied to any one of claims 1-8 is characterized in that the fabric forms a protection system through mesoporous titanium dioxide which is arranged in a fiber internal orientation and a surface multilayer shielding film, wherein the mesoporous titanium dioxide which is arranged in the fiber internal orientation forms a continuous shielding network which is distributed along the axial direction of the fiber, the distribution density is 5 multiplied by 10 4 -2×10 6 /mm < 2 >, and the ratio of the chain structure length to the fiber diameter is 1.2-4.0; the surface multilayer shielding film is formed by alternately forming a zinc oxide nano cone array and a silicon dioxide aerogel layer, the total thickness is 0.3-3.0 mu m, and the interface bonding strength between layers is not lower than 3-8MPa.
  10. 10. The ultraviolet-resistant nylon fabric according to claim 9, wherein the distribution density of mesoporous titanium dioxide in the fabric in the fiber is 10 5～ 10 6 pieces/mm 2.

Description

Anti-ultraviolet nylon fabric and preparation method thereof Technical Field The invention relates to the technical field of nylon fabric, in particular to an ultraviolet-resistant nylon fabric and a preparation method thereof. Background Along with popularization of outdoor activities and enhancement of ultraviolet protection consciousness, demands of ultraviolet-proof textiles are growing increasingly, traditional ultraviolet-proof nylon fabrics mainly realize ultraviolet-proof functions by adding inorganic ultraviolet screening agents such as titanium dioxide and zinc oxide in a spinning process or performing after-finishing coating treatment on fabrics, however, inorganic nano particles are easy to agglomerate in the spinning process, so that dispersion is uneven, stability and durability of ultraviolet-proof effects are affected, after-finishing coatings are easy to fall off in washing and wearing processes, durability is poor, and hand feeling and air permeability of the fabrics are affected. In the prior art, performance attenuation can occur after the fabric which only depends on an ultraviolet absorption mechanism is used for a long time, the protection effect on incident ultraviolet rays at a specific angle is poor only by the fabric which only depends on a reflection mechanism, and the traditional ultraviolet-proof fabric lacks intelligent response characteristics and cannot adaptively adjust the protection performance according to the ultraviolet intensity. Disclosure of Invention Aiming at the technical problems in the prior art, the invention provides an anti-ultraviolet nylon fabric and a preparation method thereof. The preparation method of the anti-ultraviolet nylon fabric solves the technical problems, and comprises the following steps: Obtaining composite functional master batches, and compositing ultraviolet response mesoporous titanium dioxide and nylon 6 through a reaction extrusion technology to form master batches with a core-shell structure; Performing fiber spinning, namely blending the composite functional master batch with nylon 66 slices, performing melt spinning, and enabling mesoporous titanium dioxide to be arranged in the fiber in an oriented manner through electric field induction in the spinning process; Constructing a bionic structure, performing vapor deposition treatment on a fiber fabric, and constructing a multilayer shielding film consisting of zinc oxide nano cones and silicon dioxide aerogel alternately on the surface of the fiber fabric; And determining the protective performance, and testing the transmittance of the fabric in the ultraviolet wave band and the ultraviolet protection factor. In a preferred embodiment, tetrabutyl titanate is used as a precursor for preparing the ultraviolet response mesoporous titanium dioxide, mesoporous titanium dioxide with the aperture of 5-15nm is synthesized by a sol-gel method under the action of a template agent cetyl trimethyl ammonium bromide, and a benzotriazole ultraviolet absorber accounting for 30% -50% of the volume of a pore canal is loaded in the pore canal; The technological parameters of the reactive extrusion technology are that the temperature range of the twin-screw extruder is 220-250 ℃, the screw rotating speed is 200-400rpm, and the feeding rate is 10-20 kg/h. In a preferred embodiment, the electric field induced directional arrangement is that an alternating electric field with the frequency of 1-10kHz and the field intensity of 0.5-2 kV/cm is applied before the melt passes through a spinneret plate, so that mesoporous titanium dioxide forms a chain-shaped arrangement structure along the direction of the electric field due to the dielectric property of the mesoporous titanium dioxide; The condition of vapor deposition treatment is that a zinc oxide nano cone array with the thickness of 50-200nm is deposited at the vacuum degree of 10-100 Pa and the substrate temperature of 80-120 ℃, and then a silicon dioxide aerogel layer with the thickness of 100-300nm is covered by chemical vapor deposition, and the process is circulated for 3-5 times. In a preferred embodiment, the test criteria for barrier properties include: The average transmittance of the tested fabric in the wave bands of UV-A of 315-400nm and UV-B of 280-315nm is not more than 2%; The UPF value of the fabric reaches more than 200, and the UPF retention rate is still not lower than 90% after 50 times of standard washing. In a preferred embodiment, in the preparation process of the ultraviolet response type mesoporous titanium dioxide, the dosage of the template agent cetyl ammonium bromide is 10% -30% of the mass of tetrabutyl titanate, the pH value of a sol-gel reaction system is controlled between 2.0-4.5, the reaction temperature is maintained between 35-75 ℃, and the curing time is 10-40 hours; the loading of the benzotriazole ultraviolet absorbent is realized by a vacuum impregnation method, the impregnation pressure is 0.01-0.05MPa, the impre