Modified fibers, methods for their preparation and use

Abstract

The application relates to a modified fiber, a preparation method and application thereof, and belongs to the field of fiber preparation. The modified fiber comprises a fiber substrate, has a modified layer in at least a partial region on the surface of the fiber substrate, has a strong permeation region in at least a partial region inside the fiber substrate, the strong permeation region is located inside the modified layer and extends to the inside of the fiber substrate, and the modified layer and the strong permeation region comprise reinforcing materials. The preparation method of the modified fiber is as follows: a modified liquid is used for pretreatment of the fiber, the pretreatment is one or more of soaking, spraying or point coating treatment of the fiber by using the modified liquid; and then heat treatment is carried out, and the fiber is stretched by 0-80 times during the heat treatment. The modified fiber of the application can produce lubricating effect between the fibers and between the fiber and the action surface, reduce the friction resistance, slow down the abrasion speed, improve the wear resistance, and improve the wear resistance grade and service life of the downstream product of the fiber.

Description

Technical Field

[0001] This invention relates to the field of fibers and fiber preparation, specifically to modified fibers, their preparation methods, and applications. Background Technology

[0002] Ultra-high molecular weight polyethylene (UHMWPE) fiber, due to its outstanding mechanical properties and excellent chemical resistance, weather resistance, high energy absorption, and superior water resistance, is widely used in bulletproof protection, marine engineering, transportation, sporting goods, biomedicine, and home textiles. In recent years, with the increasing emphasis on marine resource development worldwide, the demand for UHMWPE fiber cables has surged. However, due to the weak intermolecular forces and low surface hardness of UHMWPE, the fibers are highly susceptible to wear and even breakage when rubbed against high-hardness surfaces such as metals and ceramic particles. For example, during use, ship mooring lines experience friction with the winch, which easily causes wear on the UHMWPE fibers, leading to a reduced rope lifespan. In the field of cut-resistant gloves, protective gloves woven using conventional ultra-high molecular weight polyethylene (UHMW-PE) fibers only achieve level three of the corresponding performance evaluation grades in EN388-2003 for both abrasion resistance and cut resistance, making them increasingly unsuitable for the protection against cuts in actual working environments. The main reason for this is the insufficient abrasion resistance of UHMW-PE fibers, which are prone to wear and rapid strength loss during use. Therefore, improving the abrasion resistance of UHMW-PE fibers has become an urgent problem to be solved in the UHMW-PE fiber industry.

[0003] To improve the wear resistance of ultra-high molecular weight polyethylene (UHMWPE) materials, various modification schemes have been proposed. For example, CN103012906B discloses an UHMWPE resin composition composed of UHMWPE resin, reinforcing fibers, carbon black, antioxidants, silane coupling agents, solid lubricants, and inorganic fillers. This UHMWPE resin composition is extruded into composite sheets for use as automotive floor or side panel liners. CN116410528A discloses a high wear-resistant composite material and its modification method, which includes mixing carboxylated nitrile rubber, chlorinated polyethylene rubber, UHMWPE, epoxy resin, aminated molybdenum disulfide, lubricant, crosslinking agent, inorganic filler, organic amine, and vulcanization auxiliaries, and then mixing them in a screw mixer to obtain a high wear-resistant composite material. However, the above schemes only modify the UHMWPE resin composition and cannot be used to modify the wear resistance of already filamentous UHMWPE fibers.

[0004] There are some existing studies on the modification of ultra-high molecular weight polyethylene (UHMWPE) fibers. Patent application CN113152079A discloses a method for preparing surface-modified UHMWPE fibers. This method involves chemically grafting an inorganic nanoparticle layer onto the surface of the UHMWPE fiber. This improves the fiber's surface abrasion resistance, interfacial adhesion, and cut resistance without compromising its mechanical properties. The inorganic nanoparticles used are selected from nano-silica, nano-titanium dioxide, zirconium oxide, and alumina. Patent application CN101050595B discloses a method for preparing nano-inorganic powder-coated polymer fiber composites. This method uses poly(p-phenylenebenzobisoxazole) fibers, aramid fibers, and UHMWPE fibers as matrices, and nano-titanium dioxide, nano-silica, nano-magnesium oxide, nano-zinc oxide, nano-alumina, nano-zirconia, nano-nickel oxide, and nano-cobalt oxide as intermediate coating powders. A nano-inorganic powder film is coated onto the surface of the chemical fiber using an impregnation coating method. The aforementioned patent involves forming a coating layer of nano-inorganic particles on the fiber surface. However, tests have shown that this coating layer provides very limited improvement to the fiber's abrasion resistance and cannot meet current abrasion resistance requirements. Summary of the Invention

[0005] Based on this, the present invention aims to overcome at least one defect of the prior art and provide a modified fiber, a preparation method and its application.

[0006] In a first aspect, the present invention relates to a modified fiber comprising a fiber matrix, having a modified layer in at least a partial area on the surface of the fiber matrix, and having a highly permeable region in at least a partial area inside the fiber matrix, the highly permeable region being located inside the modified layer and extending into the fiber matrix, the modified layer and the highly permeable region comprising a reinforcing material.

[0007] Secondly, the present invention relates to a method for preparing modified fibers, comprising the following steps:

[0008] The fiber is pretreated with a modified liquid, wherein the pretreatment is one or more of soaking, spraying or dotting the fiber with the modified liquid.

[0009] The pretreated fibers are then subjected to heat treatment, during which the fibers are stretched 0-80 times to obtain the modified fibers. The modified liquid contains the reinforcing material.

[0010] Thirdly, the present invention relates to the application of a modified fiber, which is used in ropes, slings, fishing nets, net cages, ground nets, cargo nets, curtains, kite strings, dental floss, tennis racket strings, canvas, woven fabrics, non-woven fabrics, fabric tapes, battery products, capacitors, pressure vessels, hoses, umbilical cables, automotive devices, power transmission belts, building materials, stab-resistant products, cut-resistant products, bulletproof products, skis, helmets, rowing boats, canoes, bicycle frames, ship hulls, wing spars, speaker cones, electronic insulation, radomes, sails, geotextiles, automobile rims, bicycle rims, motorcycle rims, automotive interiors, impact panels, aircraft, satellites, radar, cockpits, seats, hockey sticks, baseball bats, tennis rackets, squash rackets, skis, snowboards, surfboards, paddleboards, ship hulls, masts, sails, boats, turbines, clothing, shoes, hats, and medical devices.

[0011] Fourthly, the present invention relates to a modified fiber product selected from the group consisting of: ropes, slings, fishing nets, net cages, ground nets, cargo nets, curtains, kite strings, dental floss, tennis racket strings, canvas, woven fabrics, non-woven fabrics, fabric tapes, battery products, capacitors, pressure vessels, hoses, umbilical cables, automotive components, power transmission belts, building materials, stab-resistant products, cut-resistant products, bulletproof products, skis, helmets, rowboats, canoes, bicycle frames, boat hulls, wing spars, speaker cones, electronic insulation, radomes, sails, automobile rims, bicycle rims, motorcycle rims, automotive interiors, impact panels, aircraft, satellites, radar, cockpits, seats, hockey sticks, baseball bats, tennis rackets, squash rackets, skis, snowboards, surfboards, paddleboards, boat hulls, masts, sails, turbines, clothing, shoes, hats, and medical devices.

[0012] The beneficial effects of this invention are as follows: by modifying the fiber, a modified layer is set on the fiber surface, and a highly permeable region is set inside the fiber matrix. Reinforcing materials are set in both the modified layer and the highly permeable region, so that the modified layer and the highly permeable region have a lubricating function, which generates a lubricating effect between fibers and between fibers and the working surface, thereby reducing frictional resistance, slowing down the wear rate, and thus improving wear resistance, and improving the wear resistance level and service life of downstream fiber products. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings:

[0014] Figure 1 This is a schematic diagram of the cross-sectional structure of the modified fiber;

[0015] Figure 2 A photograph of a modified fiber with the modified layer completely covering the fiber surface.

[0016] Figure 3 This is a photograph of the modified fibers whose modified layer partially covers the fiber surface. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0018] For ease of description of the fibers, fiber matrix and fiber articles of the present invention, the fiber is defined with the surface as the reference, the side facing the axis as the inner side and the side away from the axis as the outer side.

[0019] Regarding the first aspect of this invention, existing fibers, especially high-performance fibers, require modification to further improve their abrasion resistance. However, fiber modification is difficult. Taking ultra-high molecular weight polyethylene (UHMWPE) fiber as an example, its molecular chains are linked by highly symmetrical methylene structures, exhibiting high crystallinity and orientation. The surface lacks polar groups, resulting in significant chemical inertness. This chemical inertness makes it very difficult to introduce new functional groups or perform chemical modification on the fiber surface. Due to its low surface energy, it has poor wettability and adhesion to other materials. Furthermore, the dense physical structure of UHMWPE fiber makes it difficult for external modifiers to penetrate the fiber interior. Existing technologies mainly improve abrasion resistance by setting an inorganic particle layer on the surface. When the fiber is worn, the inorganic particle layer can withstand the wear first, thus improving the fiber's abrasion resistance to a certain extent. This relies on the hardness and thickness of the inorganic particles to improve abrasion resistance. However, in actual use, the inorganic particles on the surface are prone to detachment, ultimately leading to abrasion failure, thus offering very limited improvement in abrasion resistance.

[0020] Through dedicated research, the applicant discovered that replacing inorganic particles with reinforcing materials, and forming a modified layer with reinforcing materials on the fiber surface, can create a lubricating effect between fibers and between fibers and the working surface. This reduces the coefficient of friction, decreases frictional resistance, and slows down the wear rate. The lubricity, rather than the hardness of the inorganic particles, improves wear resistance, thus fulfilling the initial concept. Furthermore, a highly penetrating region is created within the fiber matrix at the location corresponding to the modified layer. Through the action of a highly penetrating agent, the reinforcing material is introduced into this region, thus penetrating the fiber's interior. This achieves a "two-pronged" effect: even after the modified layer on the fiber surface is worn away, the lubricating particles in the highly penetrating region inside the fiber continue to function during wear, producing a lubricating effect, reducing the coefficient of friction of the worn layer, further decreasing frictional resistance, and significantly slowing down the wear rate.

[0021] Figure 1 This is a schematic diagram of the cross-sectional structure of the modified fiber of the present invention. The core layer 1 and the highly permeable region 2 inside the fiber constitute the fiber matrix. The modified layer 3 is attached to the surface of the fiber matrix. The reinforcing material 4 is uniformly dispersed inside the modified layer and the highly permeable region 2.

[0022] In one preferred embodiment, the reinforcing material is selected from materials capable of producing a reinforcing effect on the fiber surface and / or within the fiber. The reinforcing material is selected from one or more of inorganic and organic reinforcing materials. The inorganic reinforcing material is selected from one or more of graphite powder, graphene, lead powder, molybdenum disulfide, boron nitride, wollastonite, talc, magnesium hydroxysilicate, fluorinated graphite, and silicon carbide. The organic reinforcing material is selected from one or more of polycarbonate, polyethylene wax, polytetrafluoroethylene wax, nylon, polyurethane, polyimide, aramid, oleamide, stearamide, vinyl bis-stearamide (EBS), ethylenedioleamide (EBO), erucamide, solid paraffin wax, silicone abrasion-resistant agents, wax emulsions, dimethyl silicone oil, liquid paraffin wax, polyethylene glycol, polypropylene glycol, methyl silicone oil, chlorophenyl silicone oil, trifluoropropyl silicone oil, glyceryl oleate, dibutyl sulfite, and toluene phosphate. All inorganic reinforcing materials are solid-state reinforcing materials, and the organic reinforcing materials include both solid and liquid reinforcing materials.

[0023] In one preferred embodiment, the reinforcing material can be modified, for example, by pre-oxidizing it to form some oxide groups on the surface before use, which can improve the modification grafting rate. For example, graphite powder or graphene can be treated with strong acid to form oxide groups through oxidation; it can also be modified by hydrophobicity or hydrophilicity.

[0024] In one preferred embodiment, the shape and size of the reinforcing material are not particularly limited, as long as the reinforcing effect can be achieved. Preferably, the reinforcing material is in solid or liquid form, wherein the solid form is powder, sheet, porous, wire, rod, hollow structure, core-shell structure, etc.; the size of the solid reinforcing material is 10nm-100μm, specifically 15nm, 20nm, 25nm, 30nm, 40nm, 50nm, 70nm, 80nm, 100nm, 150nm, 200nm, 300nm, 400nm, 500nm, 600nm, 700nm, 800nm, 900nm, 2μm, 5μm, 10μm, 15μm, 20μm, 30μm, 40μm, 50μm, 60μm, 70μm, 80μm, 90μm, etc.

[0025] In one preferred embodiment, the thickness of the modified layer is not particularly limited. To better improve abrasion resistance, the thickness of the modified layer is preferably 0.1-100 μm, more preferably 1-50 μm, and even more preferably 1-30 μm. The thickness can also be 2 μm, 5 μm, 8 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 60 μm, 70 μm, 80 μm, or 90 μm. If the modified layer is too thin, it may not effectively cover the fiber surface, thus providing limited abrasion resistance and protection. If the modified layer is too thick, although it can provide better abrasion resistance and protection, it may also increase the weight and cost of the fiber. Furthermore, excessively thick modified layers may affect the fiber's flexibility and other physical properties.

[0026] In one preferred embodiment, the modified layer occupies 0.1% to 100% of the total surface area of ​​the fiber matrix. Preferably, the modified layer occupies 0.2% to 95% of the total surface area of ​​the fiber matrix. The percentage can also be 0.5%, 0.8%, 1%, 2%, 3%, 5%, 8%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 70%, 75%, 80%, 85%, or 90%. The proportion of the modified layer to the total surface area of ​​the fiber matrix can be adjusted as needed. A proportion of 1% or more can achieve an improvement effect, and 100% can exert the maximum modification effect.

[0027] In one preferred embodiment, the highly permeable region is located inside the modified layer. The proportion of the highly permeable region to the fiber matrix refers to the proportion of the thickness of the highly permeable region to the entire fiber matrix in a cross-section along the length of the modified fiber. This thickness is the average thickness of the highly permeable region and ranges from 1% to 80% of the fiber matrix, and can be 2%, 3%, 5%, 7%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 70%, or 75%. Alternatively, the thickness of the highly permeable region is 0.1 nm to 50 μm, preferably 1 nm to 45 μm, and can specifically be 10 nm, 100 nm, 200 nm, 300 nm, 500 nm, 800 nm, 1 μm, 2 μm, 5 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, or 40 μm. The thickness of the highly permeable region is not particularly limited, but the above proportions or thicknesses are preferred. If the thickness or proportion of the highly penetrating region is insufficient, or if the highly penetrating region is insufficient along the fiber length (i.e., insufficient penetration), it may result in the inability to effectively enhance the fiber's abrasion resistance and strength, leading to a decline in fiber performance. If the thickness of the highly penetrating region is excessive, although it can provide a better reinforcement effect, it may also lead to the destruction of the fiber's internal structure, thereby affecting the fiber's strength and durability, and may also increase production costs and processing difficulties.

[0028] In one preferred embodiment, the fiber is a high-performance fiber, such as ultra-high molecular weight polyethylene fiber, polyester, nylon, aramid fiber, aramid sulfone fiber, polyimide fiber, polybenzimidazole fiber, and poly(p-phenylenebenzobisoxazole) fiber. The fiber of the present invention is not limited to a specific type of fiber, as long as it can form the modified layer and the highly permeable region. The fiber can be a commercially available conventional fiber or a composite fiber with reinforcing materials. It may also have a functional layer on its surface, including further improvements to the fiber of the present invention, such as providing other desired functional layers on the surface, like a dyeing layer or an adhesive layer. The specifications of the fiber are not specifically limited. Taking ultra-high molecular weight polyethylene fiber as an example, its molecular weight is 1.5 million to 10 million, preferably 1.5 million to 6 million, and the diameter of a single fiber can be 1-500 μm, specifically 2 μm, 5 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 200 μm, 300 μm, 400 μm, etc.

[0029] In one preferred embodiment, the modified fiber has a strength of 5-32 cN / dtex, preferably 10-31 cN / dtex, and may also be 12 cN / dtex, 15 cN / dtex, 18 cN / dtex, 20 cN / dtex, 23 cN / dtex, 25 cN / dtex, 28 cN / dtex, or 30 cN / dtex.

[0030] In one preferred embodiment, the modulus of the modified fiber is 100-1800 cN / dtex, preferably 200-1700 cN / dtex, more preferably 300-1600 cN / dtex, and can also be 400 cN / dtex, 500 cN / dtex, 600 cN / dtex, 700 cN / dtex, 800 cN / dtex, 900 cN / dtex, 1000 cN / dtex, 1100 cN / dtex, 1150 cN / dtex, 1200 cN / dtex, 1250 cN / dtex, 1300 cN / dtex, 1350 cN / dtex, 1400 cN / dtex, 1500 cN / dtex, etc.

[0031] In one preferred embodiment, the modified layer and the highly permeable region further include a coupling agent. Introducing the coupling agent into the modified layer and the highly permeable region allows the reinforcing material to be continuously grafted onto the surface and interior of the fiber, thereby increasing the grafting rate of the reinforcing material, improving the abrasion resistance of the fiber filament, and further increasing the grafting rate of the reinforcing material onto the fiber filament. Preferably, the coupling agent is a silane coupling agent, more preferably at least one selected from vinyltrichlorosilane, vinyltrimethoxysilane (A171), vinyltriethoxysilane (A151), γ-aminopropyltriethoxysilane (γ-ATPS), γ-methacryloyloxypropyltrimethoxysilane (KH-570), γ-(2,3)epoxy(propoxy)propyltrimethoxysilane (KH-560), γ-glycidoxypropyltrimethoxysilane, γ-aminopropylmethyldiethoxysilane, N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane, N-ethyl-3-trimethoxysilane-2-methylpropylamine, anilinepropyltrimethoxysilane, bis-[3-(triethoxysilane)-propyl]-amine, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, and γ-methacryloyloxypropyltrimethoxysilane. More preferably, the coupling agent is one or more of vinyltrichlorosilane, vinyltriethoxysilane, γ-aminopropyltriethoxysilane, and γ-glycidoxypropyltrimethoxysilane.

[0032] In one preferred embodiment, inorganic particles are further added to the modified layer and the highly permeable region. These inorganic particles are preferably metal oxides, such as silicon oxide, titanium oxide, zirconium oxide, aluminum oxide, magnesium oxide, zinc oxide, zirconium oxide, nickel oxide, cobalt oxide, manganese oxide, calcium oxide, and barium oxide. The inorganic particles can be nanoparticles, or one or more of ultrafine glass microspheres, carbon fibers, carbon nanotubes, and basalt fibers. These inorganic particles can enhance the cut strength of ultra-high molecular weight polyethylene fibers.

[0033] In one preferred embodiment, the fiber matrix may contain uniformly dispersed reinforcing materials or inorganic particles, which are dispersed outside the highly permeable region. The reinforcing materials or inorganic particles may be introduced into the fiber matrix, for example, by adding one or more reinforcing materials or inorganic particles to the fiber spinning raw material.

[0034] In one preferred embodiment, the modified fiber is subjected to an abrasion resistance test according to the ASTM D6611 method standard, wherein the modified fiber has an abrasion resistance of 800 to 5000 cycles, preferably more than 1000 cycles, more preferably more than 1200 cycles, and also 1500, 2000, 2500, 3000, 3500, 4000, and 4500 cycles.

[0035] Regarding the second aspect of the present invention, the key to the method for preparing the modified fiber lies in pretreating the fiber with a modifying liquid and then performing subsequent heat treatment.

[0036] The following explanation uses ultra-high molecular weight polyethylene fiber as an example; the modification solution and heat treatment process used for other fibers are adjusted similarly.

[0037] In one preferred embodiment, the modifying liquid contains a highly penetrating solvent, which is a solvent with a strong penetrating effect on the fiber. During the soaking process, the highly penetrating solvent in the modifying liquid continuously penetrates into the fiber matrix, thereby introducing reinforcing materials to the fiber surface and interior, thereby enhancing the fiber's lubricity and improving its abrasion resistance. This enhances the abrasion resistance and durability of downstream products of ultra-high molecular weight polyethylene fiber, such as ropes or textiles (e.g., cut-resistant wearable protective equipment).

[0038] In one preferred embodiment, the modified liquid contains a highly penetrating solvent and the reinforcing material. The highly penetrating solvent is a solvent with a strong penetrating effect on ultra-high molecular weight polyethylene (UHMWPE). The highly penetrating solvent can be an organic solvent used in UHMWPE solvent spinning or an extractant used in the extraction process. The organic solvent has a strong swelling effect on UHMWPE, and the extractant has a strong penetrating ability. Through the action of the highly penetrating solvent, the reinforcing material can be continuously introduced into the surface and interior of the fiber, improving the fiber's abrasion resistance.

[0039] In one preferred embodiment, the organic solvent can be any solvent and extractant known in the art suitable for gel-spun UHMWPE fibers. In some embodiments, the solvent includes one or more of decahydronaphthalene, tetrahydronaphthalene, naphthalene, white oil, kerosene, paraffin oil, mineral oil, xylene, toluene, halogenated hydrocarbons, and petroleum ether. Preferably, the extractant is one or more of gasoline, n-hexane, carbon tetrachloride, dichloromethane, xylene, and halogenated alkanes. Preferably, the extractant is dichloromethane and / or xylene. Generally, the highly penetrating solvent is selected from one or more of decahydronaphthalene, tetrahydronaphthalene, naphthalene, white oil, kerosene, paraffin oil, mineral oil, xylene, toluene, petroleum ether, gasoline, n-hexane, carbon tetrachloride, dichloromethane, halogenated alkanes, tetrachloroethylene, and hydrocarbon organic solvents.

[0040] In one preferred embodiment, the strong penetrating solvent is one or more of dichloromethane, tetrachloroethylene, decahydronaphthalene, and hydrocarbon organic solvents; preferably hydrocarbon organic solvents or tetrachloroethylene or mixtures thereof, and the hydrocarbon organic solvent is preferably PEGASOL3040.

[0041] In one preferred embodiment, the strong penetrating solvent is a hydrocarbon organic solvent or tetrachloroethylene or a mixture thereof. When the fiber is soaked in a modified solution having the aforementioned strong penetrating solvent, it is preferably combined with heating and / or ultrasonic-assisted penetration. When the strong penetrating solvent is decahydronaphthalene or dichloromethane or a combination thereof, it can be swollen and penetrated under static conditions at room temperature, and can also be combined with heating and / or ultrasonic-assisted penetration.

[0042] In one preferred embodiment, the reinforcing material contained in the modified liquid is selected from materials capable of producing a reinforcing effect on the fiber surface and / or interior. The reinforcing material is selected from one or more of inorganic and organic reinforcing materials. The inorganic reinforcing material is selected from one or more of graphite powder, graphene, lead powder, molybdenum disulfide, boron nitride, wollastonite, talc, magnesium hydroxysilicate, fluorinated graphite, and silicon carbide. The organic reinforcing material is selected from one or more of polycarbonate, polyethylene wax, polytetrafluoroethylene wax, polyurethane, polyimide, oleamide, stearamide, vinyl bis-stearamide (EBS), ethylene dioleamide (EBO), erucamide, solid paraffin wax, organosilicon wear-resistant agents, wax emulsions, dimethyl silicone oil, liquid paraffin wax, polyethylene glycol, polypropylene glycol, methyl silicone oil, chlorophenyl silicone oil, trifluoropropyl silicone oil, glyceryl oleate, dibutyl sulfite, and toluene phosphate.

[0043] In one preferred embodiment, the reinforcing material can be modified, for example, by pre-oxidizing it to form some oxide groups on the surface before use, which can improve the modification grafting rate. For example, graphite powder or graphene can be treated with strong acid to form oxide groups through oxidation; it can also be modified by hydrophobicity or hydrophilicity.

[0044] In one preferred embodiment, the modified liquid may contain a coupling agent, which can further improve the grafting rate of the reinforcing material onto the fiber filament. Preferably, the coupling agent is a silane coupling agent, more preferably at least one selected from vinyltrichlorosilane, vinyltrimethoxysilane (A171), vinyltriethoxysilane (A151), γ-aminopropyltriethoxysilane (γ-ATPS), γ-methacryloyloxypropyltrimethoxysilane (KH-570), γ-(2,3)epoxy(propoxy)propyltrimethoxysilane (KH-560), γ-glycidoxypropyltrimethoxysilane, γ-aminopropylmethyldiethoxysilane, N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane, N-ethyl-3-trimethoxysilane-2-methylpropylamine, anilinepropyltrimethoxysilane, bis-[3-(triethoxysilane)-propyl]-amine, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, and γ-methacryloyloxypropyltrimethoxysilane. More preferably, the coupling agent is one or more selected from vinyltrichlorosilane, vinyltriethoxysilane, γ-aminopropyltriethoxysilane, and γ-glycidoxypropyltrimethoxysilane. Introducing a coupling agent into the modification solution allows the reinforcing material to be continuously grafted onto the surface and interior of the fiber, increasing the grafting rate of the reinforcing material and better improving the wear resistance of the fiber.

[0045] In one preferred embodiment, the mass ratio of the strong penetrating solvent, coupling agent, and reinforcing material in the modified liquid is 100-40:10-1:10-1; during the preparation of the modified liquid, at least one of the following methods—auxiliary stirring, ultrasonication, and megaphonic physical treatment—is used to ensure that the components in the modified liquid are evenly dispersed.

[0046] In one preferred embodiment, the modified liquid further contains a surfactant, preferably an anionic surfactant, such as one or more of LAS, SDS, MSDS, SDBS, and BSDS; the amount of surfactant added is 1-5 wt.%. The surfactant has emulsifying properties, which can improve the dispersion uniformity of the reinforcing material and coupling agent in the modified liquid.

[0047] In one preferred embodiment, inorganic particles are further added to the modified liquid. These inorganic particles are preferably metal oxides, such as silicon oxide, titanium oxide, zirconium oxide, aluminum oxide, magnesium oxide, zinc oxide, zirconium oxide, nickel oxide, cobalt oxide, manganese oxide, calcium oxide, and barium oxide. The inorganic reinforcing particles can be nanoparticles, or one or more of ultrafine glass microspheres, carbon fibers, carbon nanotubes, and basalt fibers. These inorganic reinforcing particles can enhance the cut strength of ultra-high molecular weight polyethylene fibers.

[0048] In one preferred embodiment, during the soaking of ultra-high molecular weight polyethylene fibers, the temperature is maintained at 80℃-150℃, and the fibers are simultaneously stretched. The stretching ratio is 0-80 times, preferably 1-60 times, more preferably 1-50 times, and can also be 2 times, 3 times, 5 times, 8 times, 10 times, 12 times, 15 times, 20 times, 25 times, 30 times, 35 times, 40 times, etc. The specific stretching ratio can be determined according to the original thickness of the ultra-high molecular weight polyethylene fibers and actual needs.

[0049] In one preferred embodiment, the soaking time for ultra-high molecular weight polyethylene (UHMWPE) fibers at room temperature is 3 seconds to 1 hour, preferably 5 seconds to 50 minutes, and specifically can be 10 seconds, 20 seconds, 30 seconds, 40 seconds, 1 minute, 2 minutes, 3 minutes, 5 minutes, 10 minutes, 20 minutes, 30 minutes, 40 minutes, etc. The soaking time is directly related to the selected strong penetrating solvent and the molecular weight of the UHMWPE. The stronger the effect of the strong penetrating solvent, the shorter the soaking time; the smaller the molecular weight of the UHMWPE fibers, the shorter the soaking time. Under heating and / or ultrasonic conditions, the soaking time can be further shortened and the process efficiency improved.

[0050] In one preferred embodiment, modified fibers with different proportions of modified layer are obtained by controlling the soaking time. This allows for precise control of the soaking time, ensuring that the modified layer forms 100% on the fiber surface. Figure 2 As shown, the soaking time can also be controlled to be shorter, so that the modified layer is formed only in a certain area of ​​the fiber surface, such as... Figure 3 As shown, for example, 20% and 30%, the thickness of the highly permeable region in the fiber matrix is ​​also relatively low; and different thicknesses of modified layers and different thicknesses of highly permeable regions are obtained by different soaking times.

[0051] In one preferred embodiment, a modified layer is obtained in a portion of the fiber surface by applying protection to areas on the fiber surface where the modified layer does not need to be formed, such as applying a sheath to areas where protection is needed, or coating with a coating that prevents the modified liquid from penetrating the fiber matrix, thereby performing a subsequent immersion treatment with the modified liquid.

[0052] In one preferred embodiment, the modified layer and the highly penetrating area are obtained by means of dotting or spraying the modified liquid, and the area of ​​dotting or spraying is controlled to obtain the desired modified fiber.

[0053] In one preferred embodiment, the ultra-high molecular weight polyethylene fiber is a gel fiber obtained from the extraction process of solvent spinning or a finished fiber that has undergone multiple stages of hot stretching; when it is a gel fiber obtained from the extraction process, the stretching ratio during the heat treatment process is greater than 0; if it is a finished fiber, the stretching process can be skipped during the heat treatment process.

[0054] In one preferred embodiment, the heat treatment temperature is 80-150°C and the treatment time is 10-240 min.

[0055] In one preferred embodiment, the heat treatment step is set as needed. If multi-stage stretching is required, the optimal heat treatment temperature is between 137.5-148℃, and the temperatures for the three stages of stretching are 137.5℃-147.3℃-147.3℃ respectively. Under these conditions, stretching can enable the product to obtain higher mechanical properties (high strength, high modulus). If multi-stage stretching is not required, the treatment temperature can be between 100-136℃, preferably 110-130℃, and the treatment time is preferably 20-120 minutes.

[0056] The heat treatment described in this invention is actually a heating and curing process. Heating and curing through heat treatment ensures that the coating forms a stable structure on the fiber surface. Simultaneously, heating and curing helps to better form chemical bonds between the coating and the fiber surface, and between the reinforcing material and fiber molecules, enhancing the adhesion of the coating and reinforcing material on and within the fiber surface. Without heat treatment and a heating and curing process, the coating material will deform or fail during subsequent use. Furthermore, the bond between the coating and the fiber surface will be insufficient, leading to easy detachment or peeling of the coating, affecting its wear resistance.

[0057] Regarding a third aspect of the invention, the invention relates to the use of modified fibers in various application fields, mainly involving safety, protection, aviation, aerospace, defense equipment, vehicle manufacturing, shipbuilding, sporting goods, and cultural and artistic products, especially in ropes, fishing nets, net cages, ground nets, cargo nets, curtains, kite strings, dental floss, tennis racket strings, canvas, woven fabrics, non-woven fabrics, fabric tapes, battery products, capacitors, pressure vessels, hoses, umbilical cables, automotive components, power transmission belts, building materials, stab-resistant products, cut-resistant products, bulletproof products, skis, helmets, rowing boats, canoes, bicycle frames, ship hulls, wing spars, speaker cones, electronic insulation, radomes, sails, geotextiles, automobile rims, bicycle rims, motorcycle rims, automotive interiors, impact panels, aircraft, satellites, radar, cockpits, seats, hockey sticks, baseball bats, tennis rackets, squash rackets, skis, snowboards, surfboards, paddleboards, ship hulls, masts, sails, boats, turbines, clothing, shoes, hats, medical devices, and slings.

[0058] In one preferred embodiment, the rope includes cable, fishing line, mooring line, trailer rope, climbing rope, winch rope, hoisting rope, lifting rope, and traction rope, etc.

[0059] Regarding a fourth aspect of the invention, the invention relates to a modified fiber product, primarily concerning safety, protection, aviation, aerospace, defense equipment, vehicle manufacturing, shipbuilding, and sporting goods, especially ropes, fishing nets, net cages, ground nets, cargo nets, curtains, kite strings, dental floss, tennis racket strings, canvas, woven fabrics, non-woven fabrics, fabric tapes, battery products, capacitors, pressure vessels, hoses, umbilical cables, automotive components, power transmission belts, building materials, stab-resistant products, cut-resistant products, bulletproof products, skis, helmets, rowing boats, canoes, bicycle frames, ship hulls, wing spars, speaker cones, electronic insulation, radomes, sails, geotextiles, automobile rims, bicycle rims, motorcycle rims, automotive interiors, impact panels, aircraft, satellites, radar, cockpits, seats, hockey sticks, baseball bats, tennis rackets, squash rackets, skis, snowboards, surfboards, paddleboards, ship hulls, masts, sails, boats, turbines, clothing, shoes, hats, medical devices, and sling products.

[0060] In one preferred embodiment, the rope includes cable, fishing line, mooring line, trailer rope, climbing rope, winch rope, hoisting rope, lifting rope, and traction rope, etc.

[0061] Example

[0062] The embodiments of the present invention are for illustrative purposes only and should not be construed as limiting the present invention.

[0063] For simplicity, this paper only explicitly discloses some numerical ranges. However, any lower limit can be combined with any upper limit to form an unspecified range; and any lower limit can be combined with other lower limits to form an unspecified range, just as any upper limit can be combined with any other upper limit to form an unspecified range. Furthermore, although not explicitly stated, every point or individual value between the endpoints of a range is included within that range. Therefore, each point or individual value can be used as its own lower or upper limit, combined with any other point or individual value, or combined with other lower or upper limits to form an unspecified range.

[0064] The foregoing description of this application does not imply a description of every disclosed embodiment or implementation of the invention. Instead, the following description provides more specific examples of exemplary embodiments. Throughout the application, guidance is provided through a series of embodiments that can be used in various combinations. In each example, the examples are listed only as representative groups and should not be construed as exhaustive.

[0065] Example 1

[0066] This embodiment is used to process gel filaments obtained through the extraction process in a solvent spinning process, specifically ultra-high molecular weight polyethylene (UHMWPE) fibers with a molecular weight of 1.5 million to 6 million, to produce UHMWPE fibers with a fineness of 400D. The modification method is as follows:

[0067] (1) Take 45 parts by weight of hydrocarbon organic solvent PEGASOL3040, 25 parts by weight of dichloromethane, 5 parts by weight of coupling agent A171, 8 parts by weight of 50nm graphite powder, add 2.0% LAS, stir and sonicate for 30 min to obtain modified solution.

[0068] (2) Immerse the gel fibers obtained from the extraction process in the modified solution for 4 minutes, and keep the temperature at 80-85℃ during the process.

[0069] (3) The ultra-high molecular weight polyethylene gel filaments that have been soaked are subjected to three-stage thermal stretching and curing at 137.5℃-147.5℃, with a stretching ratio of 18 times, to obtain ultra-high molecular weight polyethylene fibers with a fineness of 400D.

[0070] Example 2-18

[0071] Examples 2-18 are, in turn, replacing the graphite powder in Example 1 with graphene (Example 2), lead powder (Example 3), molybdenum disulfide (Example 4), boron nitride (Example 5), wollastonite (Example 6), talc (Example 7), magnesium hydroxysilicate (Example 8), fluorinated graphite (Example 9), silicon carbide (Example 10), polycarbonate (Example 11), polyethylene wax (Example 12), polytetrafluoroethylene wax (Example 13), oleamide (Example 14), wax emulsion (Example 15), dimethyl silicone oil (Example 16), polyethylene glycol (Example 17), and chlorophenyl silicone oil (Example 18); other conditions and modification methods are the same as in Example 1.

[0072] Example 19

[0073] In this embodiment, the graphene from Example 2 was pretreated with 68% nitric acid for 1 hour, then filtered and dried to obtain graphene with some oxide groups distributed on its surface. A modification solution was then prepared according to the method in Example 1; other conditions and modification methods are described in Example 1; and finally, ultra-high molecular weight polyethylene fibers with a fineness of 400D were obtained.

[0074] Example 20

[0075] This embodiment is used to process finished ultra-high molecular weight polyethylene (UHMWPE) fibers with a fineness of 400D to obtain modified fibers; the molecular weight of UHMWPE is 1.5 million to 6 million. The modification method is as follows:

[0076] (1) Take 50 parts by weight of dichloromethane, 30 parts by weight of tetrachloroethylene, 8 parts by weight of coupling agent γ-ATPS, and 7 parts by weight of molybdenum disulfide 60nm, stir and sonicate for 35min to obtain the modified solution.

[0077] (2) Immerse the finished ultra-high molecular weight polyethylene fiber with a fineness of 400D in the modified solution for 3 minutes, and use ultrasound assistance during the treatment process.

[0078] (3) The ultra-high molecular weight polyethylene fiber filaments that have been soaked are heat-treated and cured at 120℃ to evaporate the organic solvent on the fiber filaments and obtain ultra-high molecular weight polyethylene fiber with a fineness of 400D.

[0079] Example 21

[0080] This embodiment is used to process gel filaments obtained through the extraction process in a solvent spinning process, specifically ultra-high molecular weight polyethylene (UHMWPE) fibers with a molecular weight of 1.5 million to 6 million, to produce UHMWPE fibers with a fineness of 400D. The modification method is as follows:

[0081] (1) Prepare the modified solution according to the method of Example 1, and add 8% nano silica to the modified solution; stir and sonicate for 30 min to obtain the modified solution.

[0082] (2) Immerse the gel fibers obtained from the extraction process in the modified solution for 5 minutes, and keep the temperature at 80-85℃ during the process.

[0083] (3) The ultra-high molecular weight polyethylene gel filaments that have been soaked are subjected to three-stage thermal stretching and curing at 137.5℃-147.5℃, with a stretching ratio of 18 times, to obtain ultra-high molecular weight polyethylene fibers with a fineness of 400D.

[0084] Example 22

[0085] This embodiment is used to process gel filaments obtained through the extraction process in a solvent spinning process, specifically ultra-high molecular weight polyethylene (UHMWPE) fibers with a molecular weight of 1.5 million to 6 million, to produce UHMWPE fibers with a fineness of 400D. The modification method is as follows:

[0086] (1) Take 35 parts by weight of tetrachloroethylene, 20 parts by weight of dichloromethane, 25 parts by weight of kerosene, 7 parts by weight of 60nm graphite, 4 parts by weight of coupling agent KH-570, 3 parts by weight of coupling agent A151, and 2% of BSDS, stir and sonicate for 30 minutes to obtain the modified solution.

[0087] (2) The gel fibers obtained from the extraction process are immersed in the modified solution for 3.5 min. During the treatment, the temperature is raised to 90-100℃ and 7 times the thermal stretching is performed.

[0088] (3) The ultra-high molecular weight polyethylene gel filaments that have been soaked are subjected to three-stage thermal stretching and curing at 138℃-147℃, with a stretching ratio of 10 times, to obtain ultra-high molecular weight polyethylene fibers with a fineness of 400D.

[0089] Example 23

[0090] This embodiment is used to process gel fibers obtained from solvent spinning through an extraction process, specifically high molecular weight polyethylene fibers with a molecular weight of 1.5 million to 6 million, to produce ultra-high molecular weight polyethylene fibers with a fineness of 400D. The modification method is as follows:

[0091] (1) Take 60 parts by weight of dichloromethane, 3 parts by weight of coupling agent A151, 4 parts by weight of γ-glycidyl etheroxypropyltrimethoxysilane, 8 parts by weight of 50 nm molybdenum disulfide, add 2.0% MSDS, stir and sonicate for 40 min to obtain the modified solution.

[0092] (2) Immerse the gel fibers obtained from the extraction process in the modified solution for 4.5 min, and keep the temperature at 80-85℃ during the process.

[0093] (3) The ultra-high molecular weight polyethylene gel filaments that have been soaked are subjected to three-stage thermal stretching and curing at 138℃-147℃, with a stretching ratio of 18 times, to obtain ultra-high molecular weight polyethylene fibers with a fineness of 400D.

[0094] Example 24

[0095] This embodiment is used to process gel fibers obtained from solvent spinning through an extraction process, specifically high molecular weight polyethylene fibers with a molecular weight of 1.5 million to 6 million, to produce ultra-high molecular weight polyethylene fibers with a fineness of 400D. The modification method is as follows:

[0096] (1) 30 parts by weight of xylene, 40 parts by weight of dichloromethane, 4 parts by weight of coupling agent A151, 4 parts by weight of γ-glycidyl etheroxypropyltrimethoxysilane, 8 parts by weight of wax emulsion (Hanwei Technology) + 1 part of 40 nm molybdenum disulfide, stir and sonicate for 30 min to obtain modified solution.

[0097] (2) Immerse the gel fibers obtained from the extraction process in the modified solution for 25 seconds, and keep the temperature at 80-85℃ during the process.

[0098] (3) The ultra-high molecular weight polyethylene gel filaments that have been soaked are subjected to three-stage thermal stretching and curing at 138℃-147℃, with a stretching ratio of 18 times, to obtain ultra-high molecular weight polyethylene fibers with a fineness of 400D.

[0099] Example 25

[0100] Compared to Example 1, the only difference is the addition of 10% by weight of 50nm graphite powder to the spinning raw material. After emulsification and uniform mixing, the mixture is spun through a spinneret to obtain gel filaments. The final modified fiber is...

[0101] Example 26

[0102] This embodiment is based on Example 14, except that the hydrocarbon and dichloromethane solvents used to prepare the modified solution are replaced with 80 parts by weight of anhydrous ethanol, which has no permeation effect on ultra-high molecular weight polyethylene; other conditions and modification methods are the same as in Example 14, and fibers with a fineness of 400D are obtained.

[0103] Example 27

[0104] This embodiment is based on Example 1, except that the coupling agent in the preparation of the modified solution is removed; other conditions and modification methods are the same as in Example 1, and fibers with a fineness of 400D are obtained.

[0105] Example 28

[0106] This embodiment is based on Example 15, except that the coupling agent in the preparation of the modified solution is removed; other conditions and modification methods are the same as in Example 15, and fibers with a fineness of 400D are obtained.

[0107] Comparative Example 1

[0108] This comparative example is a finished ultra-high molecular weight polyethylene fiber with a fineness of 400D, prepared using conventional spinning technology, with a molecular weight of 1.5 million to 6 million.

[0109] Comparative Example 2

[0110] This comparative example is based on Example 20, but without the heat treatment step S3. Other conditions and modification methods are the same as in Example 20, yielding fibers with a fineness of 400D.

[0111] Comparative Example 3

[0112] This comparative example is based on Example 20, but with molybdenum disulfide replaced by carbon fiber inorganic particles. Other conditions and modification methods are the same as in Example 20, and fibers with a fineness of 400D are obtained.

[0113] Comparative Example 4

[0114] This comparative example is based on Example 1, except that the solvent for preparing the modified solution was replaced with 80 parts by weight of anhydrous ethanol, which has no permeation effect on ultra-high molecular weight polyethylene, and the graphite powder was replaced with silicon dioxide; other conditions and modification methods are the same as in Example 1, and fibers with a fineness of 400D are obtained.

[0115] The UHMWPE fibers prepared by the above methods were subjected to abrasion tests (Flory abrasion tester, pretension 60mN / tex) according to the ASTM D6611 standard, and the strength and modulus were tested according to the GB / T 14344 standard method.

[0116] The test results are shown in Table 1.

[0117] Table 1

[0118]

[0119]

[0120] As can be seen from the examples and comparative examples, the wear resistance of the modified fiber of the present invention is greatly improved. At the same time, the fineness, strength, and modulus of the fiber are not significantly reduced compared to the unmodified fiber (Comparative Example 1). This indicates that the modification of the fiber significantly improves wear resistance without significantly reducing other fiber properties, achieving remarkable progress. Comparative Example 2 did not undergo subsequent heat treatment, resulting in insufficient bonding between the coating and the fiber surface, failing to form a stable structure. Insufficient grafting of lubricating particles to the matrix in the penetration zone led to easy detachment or peeling of the coating, affecting its wear resistance. Comparative Example 3 did not use reinforcing materials but instead used carbon fiber inorganic particles, resulting in limited improvement in wear resistance and a significant difference compared to other examples. Comparative Example 4 used silica, which has no lubricating effect, resulting in very limited improvement in wear resistance.

[0121] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the specific implementation of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of the present invention should be included within the protection scope of the claims of the present invention.

Claims

1. A modified fiber comprising a fiber matrix, characterized in that, The fiber matrix has a modified layer on at least a portion of its surface and a highly permeable region in at least a portion of its interior, the highly permeable region being located inside the modified layer and extending into the fiber matrix, the modified layer and the highly permeable region comprising reinforcing material.

2. The modified fiber according to claim 1, characterized in that, The thickness of the highly permeable region is 0.1 nm to 50 μm, or the highly permeable region accounts for 1% to 80% of the fiber matrix.

3. The modified fiber according to claim 1 or 2, characterized in that, The reinforcing material is selected from materials capable of producing a reinforcing effect in the fiber-modified layer and the highly permeable region, and the reinforcing material is selected from one or more of inorganic reinforcing materials and organic reinforcing materials.

4. The modified fiber according to claim 1 or 2, characterized in that, The content of the reinforcing material in the modified layer and the highly permeable region is 10% to 100% by mass percentage. The inorganic reinforcing material is selected from one or more of graphite powder, graphene, lead powder, molybdenum disulfide, boron nitride, wollastonite, talc, magnesium hydroxysilicate, fluorinated graphite, and silicon carbide. The organic reinforcing material is selected from one or more of polycarbonate, polyethylene wax, polytetrafluoroethylene wax, polyurethane, polyimide, oleamide, stearamide, vinyl bis-stearamide (EBS), ethylene dioleamide (EBO), erucamide, solid paraffin wax, organosilicon wear-resistant agents, wax emulsions, dimethyl silicone oil, liquid paraffin wax, polyethylene glycol, polypropylene glycol, methyl silicone oil, chlorophenyl silicone oil, trifluoropropyl silicone oil, glyceryl oleate, dibutyl sulfite, and toluene phosphate.

5. The modified fiber according to claim 2, characterized in that, The thickness of the modified layer is 0.1-100 μm, and / or the modified layer accounts for 0.1% to 100% of the total surface area of ​​the fiber matrix.

6. The modified fiber according to claim 1, characterized in that, The fiber is ultra-high molecular weight polyethylene fiber, aramid fiber, nylon, polyester, aramid fiber, polyimide fiber, polybenzimidazole fiber, or poly(p-phenylenebenzobisoxazole) fiber.

7. The modified fiber according to claim 1, characterized in that, The modified layer and the highly permeable region also include a silane coupling agent, specifically one or more of the following: vinyltrichlorosilane, vinyltrimethoxysilane (A171), vinyltriethoxysilane (A151), γ-aminopropyltriethoxysilane (γ-ATPS), γ-methacryloyloxypropyltrimethoxysilane (KH-570), γ-(2,3)epoxy(propoxy)propyltrimethoxysilane (KH-560), γ-glycidoxypropyltrimethoxysilane, γ-aminopropylmethyldiethoxysilane, N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane, N-ethyl-3-trimethoxysilane-2-methylpropylamine, anilinepropyltrimethoxysilane, bis-[3-(triethoxysilane)-propyl]-amine, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, and γ-methacryloyloxypropyltrimethoxysilane.

8. The modified fiber according to claim 1, characterized in that, Inorganic particles are added to the modified layer and the highly permeable region. The inorganic particles are one or more of metal oxides, ultrafine glass microspheres, carbon fibers, carbon nanotubes, and basalt fibers. The reinforcing material or the inorganic particles are uniformly dispersed in the fiber matrix.

9. A method for preparing the modified fiber according to any one of claims 1-8, characterized in that, Includes the following steps: The fiber is pretreated with a modified liquid, wherein the pretreatment is one or more of soaking, spraying or dotting the fiber with the modified liquid. The pretreated fibers are then subjected to heat treatment, during which the fibers are stretched 0-80 times to obtain the modified fibers. The modified liquid contains the reinforcing material.

10. The method for preparing modified fibers according to claim 9, characterized in that, The modified liquid contains a highly penetrating solvent, which is a solvent that has a strong penetrating effect on the fiber.

11. The method for preparing modified fibers according to claim 10, characterized in that, The highly penetrating solvent is selected from the organic solvent used in the ultra-high molecular weight polyethylene solvent spinning method, or the extractant used in the extraction process.

12. The method for preparing modified fibers according to claim 10, characterized in that, The highly penetrating solvent is selected from one or more of the following: decahydronaphthalene, tetrahydronaphthalene, naphthalene, white oil, kerosene, paraffin oil, mineral oil, xylene, toluene, petroleum ether, gasoline, n-hexane, carbon tetrachloride, dichloromethane, haloalkanes, tetrachloroethylene, or hydrocarbon organic solvents.

13. The method for preparing the modified fiber according to any one of claims 9-12, characterized in that, The modified liquid contains a silane coupling agent, specifically one or more of the following: vinyltrichlorosilane, vinyltrimethoxysilane (A171), vinyltriethoxysilane (A151), γ-aminopropyltriethoxysilane (γ-ATPS), γ-methacryloyloxypropyltrimethoxysilane (KH-570), γ-(2,3)epoxy(propoxy)propyltrimethoxysilane (KH-560), γ-glycidoxypropyltrimethoxysilane, γ-aminopropylmethyldiethoxysilane, N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane, N-ethyl-3-trimethoxysilane-2-methylpropylamine, anilinepropyltrimethoxysilane, bis-[3-(triethoxysilane)-propyl]-amine, N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, and γ-methacryloyloxypropyltrimethoxysilane.

14. The method for preparing modified fibers according to claim 13, characterized in that, In the modified liquid, the mass ratio of the strong penetrating solvent, coupling agent, and reinforcing material is 100-40:10-1:10-1, and / or, during the preparation of the modified liquid, at least one of the following methods is used: auxiliary stirring, ultrasonication, and megaphonic physical treatment, and / or, the modified liquid further includes a surfactant, and / or, the heat treatment temperature is 80-150℃.

15. The application of a modified fiber as described in any one of claims 1-8, or a modified fiber prepared by the method for preparing a modified fiber as described in any one of claims 9-14, characterized in that, The modified fibers are used in ropes, fishing lines, slings, fishing nets, net cages, ground nets, cargo nets, curtains, kite strings, dental floss, tennis racket strings, canvas, woven fabrics, non-woven fabrics, fabric tapes, battery products, capacitors, pressure vessels, hoses, umbilical cables, automotive components, power transmission belts, building materials, stab-resistant products, cut-resistant products, bulletproof products, skis, helmets, rowboats, canoes, bicycle frames, boat hulls, wing spars, speaker cones, electronic insulation, radomes, sails, geotextiles, automobile rims, bicycle rims, motorcycle rims, automotive interiors, impact panels, aircraft, satellites, radar, cockpits, seats, hockey sticks, baseball bats, tennis rackets, squash rackets, skis, snowboards, surfboards, paddleboards, boat hulls, masts, sails, boats, turbines, clothing, shoes, hats, or medical devices.

16. The application of the modified fiber according to claim 15, characterized in that, The ropes include cables, mooring ropes, trailer ropes, climbing ropes, winch ropes, hoisting ropes, lifting ropes, and traction ropes.

17. A fiber product, characterized in that, The fiber product comprises the modified fiber as described in any one of claims 1-8, or the modified fiber prepared by the method of preparing the modified fiber as described in any one of claims 9-14. The fiber product is selected from ropes, fishing lines, slings, fishing nets, net cages, ground nets, cargo nets, curtains, kite lines, dental floss, tennis racket lines, canvas, woven fabrics, non-woven fabrics, fabric tapes, battery products, capacitors, pressure vessels, hoses, umbilical cables, automotive devices, power transmission belts, building materials, stab-resistant products, cut-resistant products, bulletproof products, skis, helmets, rowboats, canoes, bicycle frames, boat hulls, wing spars, speaker cones, electronic insulation, radomes, sails, automobile rims, bicycle rims, motorcycle rims, automotive interiors, impact panels, aircraft, satellites, radar, cockpits, seats, hockey sticks, baseball bats, tennis rackets, squash rackets, skis, snowboards, surfboards, paddleboards, boat hulls, masts, sails, turbines, clothing, shoes, hats, or medical devices.

18. The fiber article according to claim 17, characterized in that, The ropes include cables, mooring ropes, trailer ropes, climbing ropes, winch ropes, hoisting ropes, lifting ropes, and traction ropes.

Images