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CN-121975307-A - Self-cleaning type anti-pollution nylon slice and preparation method thereof

CN121975307ACN 121975307 ACN121975307 ACN 121975307ACN-121975307-A

Abstract

The invention belongs to the field of nylon fibers, and particularly relates to a self-cleaning type anti-fouling nylon slice and a preparation method thereof. The self-cleaning nylon chip provided by the invention comprises polyamide, modified polyamide, functional filler and nucleating agent, wherein the modified polyamide is prepared by polymerizing diamine, long carbon chain dibasic acid, functional monomer containing siloxane bond and functional monomer containing fluorine ether bond. According to the invention, the fluoroether bond and the siloxane bond are introduced into the molecular structure of the nylon through the functional monomer containing the fluoroether bond and the functional monomer containing the siloxane bond, and the silane coupling agent is adopted to modify the nano titanium dioxide and the graphite carbon nitride, so that the anti-fouling effect and the self-cleaning effect of the nylon are effectively improved.

Inventors

  • LIN SHENGGEN
  • DING WENXIANG
  • ZHANG BIWU
  • HUANG QICHAO

Assignees

  • 江苏弘盛新材料(集团)股份有限公司

Dates

Publication Date
20260505
Application Date
20260408

Claims (10)

  1. 1. A self-cleaning type anti-fouling nylon slice is characterized by comprising, by weight, 100-120 parts of polyamide, 20-40 parts of modified polyamide, 10-15 parts of functional filler and 3-8 parts of nucleating agent, wherein the modified polyamide is prepared by polymerizing a monomer I, a monomer II, a monomer III and a monomer V, the monomer I is diamine, the monomer II is long carbon chain dibasic acid, the monomer III is a functional monomer containing a siloxane bond, and the monomer V is a functional monomer containing a fluorine ether bond.
  2. 2. The self-cleaning type anti-fouling nylon chip of claim 1, wherein the functional monomer containing siloxane bond is 3-bis (3-aminopropyl) -1, 3-tetramethyl disiloxane, and the nucleating agent is one of sodium adipate, calcium adipate, sodium suberate and calcium suberate.
  3. 3. The self-cleaning type anti-fouling nylon chip of claim 1, wherein the preparation method of the functional monomer containing the fluoroether linkage comprises the steps of adding perfluorohexane and methanol into a reaction kettle, introducing nitrogen, reducing the temperature of the reaction kettle to be minus 10 ℃ to minus 5 ℃, adding potassium hydroxide, dropwise adding perfluoropropylene oxide at the rate of 0.5 mL/mm in a stirring state after stirring for 10-20 min, heating to 20-30 ℃ after the dropwise adding, stirring for 2-3 h, adding hydrochloric acid aqueous solution with the mass percent of 10% to adjust the pH value of the system to be neutral, standing for layering, separating to obtain an oil phase, distilling at 55-60 ℃ for 0.5-1h, distilling at 120-130 ℃ for 1-1.5h, drying, and cooling to obtain the functional monomer containing the fluoroether linkage.
  4. 4. The self-cleaning type anti-fouling nylon chip of claim 3, wherein the molar ratio of the methanol to the perfluoropropylene oxide to the potassium hydroxide in the preparation method of the functional monomer containing the fluoroether linkage is (10-13): (1.2-1.5): (0.03-0.07).
  5. 5. The self-cleaning type anti-fouling nylon chip of claim 1, wherein the diamine is one of nonanediamine, octanediamine, hexamethylenediamine and pentanediamine, and the long carbon chain diacid is one of dodecanedioic acid, tetradecanedioic acid, hexadecanedioic acid and octadecanedioic acid.
  6. 6. The self-cleaning type anti-fouling nylon chip of claim 1, wherein the mole ratio of the monomer I to the monomer II to the monomer III to the monomer V is 1 (3-5): (0.15-0.23): (0.5-0.8).
  7. 7. The self-cleaning type anti-fouling nylon slice according to claim 1, wherein the preparation method of the modified polyamide is characterized in that monomer I and monomer III are added into deionized water according to a volume ratio of 1:3, heated to 50-60 ℃ and stirred uniformly, monomer II is added, stirred and reacted for 1-1.5 h, filtered, filtrate is added into a reaction kettle, nitrogen is introduced for 3 times for replacement, the temperature is raised to 120-140 ℃, the pressure in the reaction kettle is controlled to be 0.3-0.5 MPa, stirred and reacted for 2-2.5 h, water is recovered through a kettle top condenser, then heated to 180-200 ℃, the pressure is increased to 1.0-1.2 MPa at a rate of 0.1MPa/h, stirred and reacted for 3-3.5 h, the pressure in the kettle is slowly released to normal pressure, the temperature is raised to 220-240 ℃, the absolute pressure is 50-100 Pa, the stirred and reacted for 4-6 h (water generated by the simultaneous reaction) is removed, monomer V and scandium triflate are added, the stirred and reacted for 1-2 h, the melt is introduced into nitrogen, and the melt is subjected to a submerged dryer, granulated, and the modified polyamide is obtained.
  8. 8. The self-cleaning type anti-fouling nylon chip of claim 1, wherein the preparation method of the functional filler comprises the steps of dispersing nano titanium dioxide in an ethanol aqueous solution, adding gamma-aminopropyl triethoxysilane, heating to 60-70 ℃, stirring and reacting for 2-3 hours, standing and cooling, filtering to obtain modified nano titanium dioxide, dispersing graphite carbon nitride in toluene, adding gamma-glycidoxypropyl trimethoxysilane, heating to 80-85 ℃, stirring and reacting for 4-5 hours, standing and cooling, filtering to obtain modified graphite carbon nitride, and mixing the modified nano titanium dioxide and the modified graphite carbon nitride according to a mass ratio of (3-5): (7-11) to obtain the functional filler.
  9. 9. The self-cleaning type anti-fouling nylon chip of claim 8, wherein in the preparation method of the functional filler, the mass ratio of the nano titanium dioxide to the gamma-aminopropyl triethoxysilane is (18-20), the mass ratio of the graphite carbon nitride to the gamma-glycidoxypropyl trimethoxysilane is (3-7), and the mass ratio of the graphite carbon nitride to the gamma-glycidoxypropyl trimethoxysilane is (15-19), the mass ratio of the graphite carbon nitride to the gamma-aminopropyl triethoxysilane is (4-8).
  10. 10. The preparation method of the self-cleaning type anti-fouling nylon slice according to any one of claims 1 to 9, which is characterized by comprising the steps of mixing polyamide and modified polyamide, heating and melting, adding functional filler and nucleating agent, uniformly mixing, extruding and granulating to obtain the self-cleaning type anti-fouling nylon slice.

Description

Self-cleaning type anti-pollution nylon slice and preparation method thereof Technical Field The invention belongs to the field of nylon fibers, and particularly relates to a self-cleaning type anti-fouling nylon slice and a preparation method thereof. Background Nylon chips, which are important basic raw materials for synthetic fibers and engineering plastics, are important in the fields of automotive interiors, electronic and electrical appliances, clothing textile, aerospace and the like by virtue of excellent wear resistance, excellent mechanical strength, good chemical corrosion resistance and excellent processability, and become one of key materials for promoting the development of various industries. The molecular structure of the nylon slice contains amide groups, and the molecular terminal contains functional groups such as amino groups, carboxyl groups and the like, so that the nylon material has certain polarity and is easy to interact with polar stain molecules, thereby leading to easy staining of the nylon product. In addition, nylon has strong water absorption, and after absorbing water, the charge distribution on the fiber surface can change, so that pollutants such as dust, oil stains and the like are more easily absorbed. These stains not only affect the appearance of the product, but may also reduce the performance of the product. In order to solve the problem of easy contamination of nylon chips, the anti-fouling treatment modes such as after-finishing, surface coating and the like are mainly adopted at present. The traditional post-finishing method is to apply an anti-fouling finishing agent on the surface of a nylon product, and form a layer of protective film on the surface of the fiber through chemical or physical action, so that the anti-fouling aim is achieved, however, the method has the problem that the anti-fouling effect is not durable, the anti-fouling finishing agent gradually drops off along with the increase of washing times, and the anti-fouling performance is also reduced along with the increase of washing times. The surface coating technology is to coat a layer of coating material with anti-fouling performance, such as fluorocarbon coating, organic silicon coating, etc., on the surface of nylon product, while the method can improve the anti-fouling performance of nylon product to a certain extent, the hardness and flexibility of the coating material are limited, the coating material is easy to be damaged by external force such as friction, stretching, etc. in the use process, once the coating is damaged, the anti-fouling performance is lost. In addition, the above process is applicable only to the anti-fouling treatment of nylon products and is not applicable to nylon chips, and thus, it has become urgent to develop a nylon chip having an anti-fouling effect. The Chinese patent application document with the publication number of CN115559013A discloses an anti-fouling high-strength graphene nylon long fiber, which comprises nylon fiber, a graphene anti-fouling modifier, an antioxidant, a light stabilizer and modified silicon dioxide, wherein the graphene anti-fouling modifier is matched with the modified silicon dioxide, so that the strength and the anti-fouling performance of a product are enhanced. However, the graphene in the graphene stain-resistant improver has higher specific surface area, stronger interlayer Van der Waals force and easy irreversible agglomeration, not only loses the interface enhancement effect of the nano material, but also forms stress concentration points in the fiber to influence the mechanical properties of the fiber. Disclosure of Invention In order to solve the technical problem of poor anti-fouling effect in the related art, the invention aims to provide a self-cleaning anti-fouling nylon slice and a preparation method thereof. In order to achieve the above object, the technical scheme of the present invention is as follows: The self-cleaning type anti-fouling nylon slice comprises, by weight, 100-120 parts of polyamide, 20-40 parts of modified polyamide, 10-15 parts of functional filler and 3-8 parts of nucleating agent, wherein the modified polyamide is prepared by polymerizing a monomer I, a monomer II, a monomer III and a monomer V, the monomer I is diamine, the monomer II is long carbon chain dibasic acid, the monomer III is a functional monomer containing a silicon oxygen bond, and the monomer V is a functional monomer containing a fluorine ether bond. In the scheme, the fluoroether bond and the siloxane bond are introduced into the molecular structure of the nylon through the functional monomer containing the fluoroether bond and the functional monomer containing the siloxane bond, the ether bond in the fluoroether bond can reduce the rigidity of a perfluorinated carbon chain, so that the fluorine-containing group is more easily enriched on the surface of the nylon, the flexibility of the molecular chain is improved while the surface