Filament modification liquid and fiber modification method

Abstract

The invention relates to a cellosilk modification liquid and a cellosilk modification method. The cellosilk modification liquid contains a strong permeation solvent, a coupling agent and a self-lubricating agent, the strong permeation solvent is a solvent with a strong permeation effect on the ultra-high molecular weight polyethylene. The modification method of the cellosilk comprises the following steps: soaking the ultra-high molecular weight polyethylene cellosilk into the modification liquid; and taking out the fibers, carrying out heat treatment on the fibers, and drafting the fibers by 0-20 times in the heat treatment process, so as to obtain the wear-resistant yarns. According to the preparation method, the ultra-high molecular weight polyethylene fibers are soaked by preparing the modification liquid containing the strong permeation solvent, the coupling agent and the self-lubricating agent, the strong permeation solvent continuously permeates into the fibers, the self-lubricating agent is grafted to the surfaces and the interiors of the fibers through the grafting effect of the coupling agent, and the ultra-high molecular weight polyethylene fibers are obtained. Therefore, the lubricity and the wear resistance of the fiber yarn are enhanced, and the wear-resistant grade and the durability of downstream products of the ultra-high molecular weight polyethylene fiber yarn, such as mooring ropes, ropes or textile fabrics, are improved.

Description

Technical Field

[0001] The invention relates to the technical field of fiber preparation technology, in particular to a fiber modification liquid and a fiber modification method. Background Art

[0002] Ultra-high molecular weight polyethylene fiber is widely used in bulletproof protection, marine engineering, transportation, sports equipment, biomedicine, home textiles and other fields due to its outstanding mechanical properties and excellent chemical resistance, weather resistance, high energy absorption and excellent waterproof properties. In recent years, with the increasing attention paid by countries around the world to the development of marine resources, the demand for the application of ultra-high molecular weight polyethylene fiber cables has increased sharply. However, due to the weak intermolecular force and low surface hardness of ultra-high molecular weight polyethylene, ultra-high molecular weight polyethylene fibers are very easy to wear or even break when rubbing against the surface of high-hardness materials such as metals and ceramic particles. For example, during the use of ship mooring cables, friction occurs with the cable machine, which can easily cause the ultra-high molecular weight polyethylene fibers in the cables to wear, thereby reducing the service life of the ropes. In the field of cut-resistant gloves, the wear resistance and cut-resistant grades of protective gloves woven with conventional ultra-high molecular weight polyethylene fibers can only reach the third level of the corresponding performance evaluation level in EN388-2003, which is increasingly unsuitable for the protection needs of cut hazards in actual working environments; the main reason for this is that the wear resistance of ultra-high molecular weight polyethylene fibers is insufficient, and they are prone to wear and rapid strength loss during use. Therefore, improving the wear resistance of ultra-high molecular weight polyethylene fibers has become an urgent problem to be solved in the UHMW-PE fiber industry.

[0003] In order to improve the wear resistance of ultra-high molecular weight polyethylene materials, a variety of modification schemes have been proposed; for example, CN103012906B discloses an ultra-high molecular weight polyethylene resin composition, which is composed of ultra-high molecular weight polyethylene resin, reinforcing fiber, carbon black, antioxidant, silane coupling agent, solid lubricant and inorganic filler. The ultra-high molecular weight polyethylene resin composition is prepared into a composite sheet by extrusion molding, and is made into a vehicle bottom plate or side plate lining. CN116410528A discloses a high wear-resistant composite material and a modification method thereof, which comprises mixing carboxyl nitrile rubber, chlorinated polyethylene rubber, ultra-high molecular weight polyethylene, epoxy resin, amino molybdenum disulfide, lubricant, cross-linking agent, inorganic filler, organic amine, and vulcanization aid, and then feeding them into a screw mixer to mix and prepare a high wear-resistant composite material. However, the above schemes are only for modifying ultra-high molecular weight polyethylene resin compositions, and cannot be used for wear-resistant modification of already filamented ultra-high molecular weight polyethylene fibers. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a fiber modification liquid and a fiber modification method, which can efficiently and quickly lubricate and modify ultra-high molecular weight polyethylene fiber filaments, improve the wear resistance of the ultra-high molecular weight polyethylene fiber filaments, and thereby slow down the wear rate of downstream products of the ultra-high molecular weight polyethylene fiber such as ropes, cables or braids, extend the service life and wear resistance level, and broaden the application range of the ultra-high molecular weight polyethylene fiber filaments.

[0006] (II) Technical solution

[0007] In a first aspect, the present invention provides a fiber modification liquid, which contains a strong penetrating solvent, a coupling agent and a self-lubricant; the strong penetrating solvent is a solvent that has a strong penetrating effect on ultra-high molecular weight polyethylene.

[0008] According to a preferred embodiment of the present invention, in the modified liquid, the mass ratio of the strong penetrating solvent, the coupling agent and the self-lubricant is 100-40:10-1:10-1; during the preparation of the modified liquid, at least one method of auxiliary stirring, ultrasound and megasonic physical treatment is used to make the components in the modified liquid evenly dispersed.

[0009] According to a preferred embodiment of the present invention, the strong penetrating solvent is a combination of an organic solvent used for ultra-high molecular weight polyethylene solvent spinning and an extractant used in the extraction process. The former has a strong swelling effect on ultra-high molecular weight polyethylene (chips), and the latter has a strong penetration ability; the combined application of the two can continuously allow the self-lubricant to be grafted onto the surface and inside of the fiber, thereby increasing the grafting rate of the self-lubricant and improving the wear resistance of the fiber.

[0010] Preferably, the organic solvent used in the solvent spinning method can be any known solvent suitable for gel-spinning UHMWPE fibers in the art. In some embodiments, the solvent includes one or more of decalin, tetralin, 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, methylene chloride, xylene and halogenated alkane. Preferably, the extractant is methylene chloride and / or xylene.

[0011] According to a preferred embodiment of the present invention, the strong penetrating solvent is one or a combination of two or more of dichloromethane (commonly used as an extractant), tetrachloroethylene, decahydronaphthalene, and a hydrocarbon organic solvent; preferably a hydrocarbon organic solvent or tetrachloroethylene or a mixture thereof, and the hydrocarbon organic solvent is preferably PEGASOL3040.

[0012] When the strong penetrating solvent is a hydrocarbon organic solvent or tetrachloroethylene or a mixture thereof, when the ultra-high molecular weight polyethylene fiber filaments are immersed in S2, it is preferred to cooperate with heating and / or ultrasound to assist swelling and penetration; when the strong penetrating solvent is decahydronaphthalene or dichloromethane or a combination thereof, swelling and penetration can be carried out under static conditions at room temperature or with heating and / or ultrasound to assist swelling and penetration.

[0013] According to a preferred embodiment of the present invention, the coupling agent is a silane coupling agent, preferably at least one of vinyl trichlorosilane, vinyl trimethoxysilane (A171), vinyl triethoxysilane (A151), γ-aminopropyl triethoxysilane (γ-ATPS), γ-methacryloxypropyl trimethoxysilane (KH-570), γ-(2,3) epoxy (propoxy) propyl trimethoxysilane (KH-560), γ-glycidyloxypropyl trimethoxysilane and γ-methacryloxypropyl trimethoxysilane. More preferably, the coupling agent is vinyl trichlorosilane, vinyl triethoxysilane, γ-aminopropyl triethoxysilane or γ-glycidyloxypropyl trimethoxysilane.

[0014] According to a preferred embodiment of the present invention, the self-lubricant is at least one of graphite powder, graphene, lead powder, oleic acid amide, erucic acid amide, molybdenum disulfide, boron nitride, polyethylene wax powder, polytetrafluoroethylene wax powder, aramid powder, silicone powder (also called siloxane), wax emulsion, wollastonite and talcum powder. Hydrophobic or easily agglomerated self-lubricants are preferably pre-oxidized to form some oxidized groups on the surface before use, which can improve the modified grafting rate, for example, graphite powder or graphene can be oxidized by strong acid to form some oxidized groups.

[0015] According to a preferred embodiment of the present invention, a surfactant is further added to the modified liquid, preferably an anionic surfactant, such as one or more of LAS, SDS, MSDS, and SDBS; the amount of the surfactant added is 1-5wt.%. The surfactant has an emulsifying effect and can improve the dispersion uniformity of the self-lubricant and coupling agent in the modified liquid.

[0016] According to a preferred embodiment of the present invention, inorganic particles are further added to the modified liquid, and the inorganic particles are inorganic reinforcing particles. The inorganic reinforcing particles are preferably one or more of nano-Al2O3, nano-SiO2, titanium dioxide, ultra-fine glass microbeads (over 800 mesh), etc. These inorganic reinforcing particles can enhance the cutting resistance of the ultra-high molecular weight polyethylene fiber.

[0017] In a second aspect, the present invention also provides a method for modifying fiber filaments, which comprises soaking ultra-high molecular weight polyethylene fiber filaments in the fiber filament modification liquid described in any of the above embodiments; then heat-treating the fiber filaments soaked in the modification liquid, and stretching the fiber filaments 0-20 times during the heat treatment process to obtain wear-resistant wires.

[0018] Preferably, during the soaking process of the ultra-high molecular weight polyethylene fiber filaments, the temperature is maintained at 80°C-150°C, and the fiber filaments are simultaneously stretched at a stretching multiple of 1-10 times. The specific stretching multiple can be determined according to the thickness of the original ultra-high molecular weight polyethylene fiber filaments and actual needs.

[0019] Preferably, the soaking time of the ultra-high molecular weight polyethylene fiber is 10 seconds to 1 hour at room temperature. The soaking time is directly related to the selected strong penetrating solvent and the molecular weight of the ultra-high molecular weight polyethylene. The stronger the strong penetrating solvent, the shorter the soaking time; the smaller the molecular weight of the ultra-high molecular weight polyethylene fiber, the shorter the soaking time. Under heating and / or ultrasonic conditions, the soaking time can be further shortened and the process efficiency can be improved.

[0020] According to a preferred embodiment of the present invention, the ultra-high molecular weight polyethylene fiber filaments are gel fiber filaments obtained in the extraction process of the solvent spinning process or are finished fibers that have undergone multiple stages of heat drawing; when they are gel fiber filaments obtained in the extraction process, the drawing multiple during the heat treatment process is greater than 0; if they are finished fibers, no drawing treatment is required during the heat treatment process.

[0021] Among them, the heat treatment steps are set according to needs. If multi-stage stretching is required, the heat treatment temperature is optimally between 137.5-148°C, and the temperatures of the three-stage stretching are 137.5°C-147.3°C-147.3°C respectively. Under this condition, stretching can enable the product to obtain higher mechanical (high strength, high modulus) properties; if multi-stage stretching is not required, the treatment temperature can be between 100-136°C, and the treatment time can be 20min-120min.

[0022] In the present application, the molecular weight of the ultra-high molecular weight polyethylene is 1.5-10 million, preferably 1.5-6 million.

[0023] In a second aspect, the present invention provides a fiber yarn, which is prepared by the modification method of any of the above embodiments.

[0024] (III) Beneficial effects

[0025] The present invention prepares a modification liquid containing a strong penetrating solvent, a coupling agent and a self-lubricant, and soaks the ultra-high molecular weight polyethylene fiber filaments. During the soaking process, the strong penetrating solvent continuously penetrates into the fiber filaments, thereby introducing the coupling agent and the self-lubricant to the fiber surface and the inside, and utilizing the grafting effect of the coupling agent to graft the self-lubricant to the fiber surface and the inside, thereby enhancing the lubricity of the fiber filaments and improving the wear resistance, and improving the wear resistance and durability of downstream products of the ultra-high molecular weight polyethylene fiber filaments such as ropes or textiles (such as anti-cutting wearable protective equipment). The coupling agent is more preferably a coupling agent with an -NH2 group, which can make the fiber surface and the inside have an active -NH2 group to increase the grafting rate of the self-lubricant on the fiber filament.

[0026] In the present invention, the strong penetrating solvent penetrates the ultra-high molecular weight polyethylene fiber filaments continuously from the outside to the inside and penetrates deeper and deeper, so that the fiber filaments are continuously grafted with the self-lubricant from the outside to the inside. The grafted self-lubricant produces a lubricating effect between the fiber filaments and between the fiber filaments and the action surface, thereby reducing friction resistance, slowing down the wear rate, increasing the service life and wear resistance and cut resistance level of the ultra-high molecular weight polyethylene fiber filaments, and broadening the application environment.

[0027] Preferably, during the soaking process, heating and / or ultrasound may be used to enhance the swelling penetration according to the penetration ability of the strong penetrating solvent, thereby increasing the grafting speed and grafting rate of the self-lubricating agent onto the fiber filaments.

[0028] Preferably, during the soaking process, the appropriate temperature (such as 80-150°C) can be maintained and the fiber filaments can be stretched by appropriate multiples. On the one hand, wear-resistant wire products of the required fineness can be obtained, and on the other hand, the self-lubricant can continuously contact the new fiber surface to increase the grafting rate of the self-lubricant to the fiber filament.

[0029] Preferably, some inorganic hydrophobic or easily agglomerated self-lubricants are preferably pre-oxidized to form some oxidized groups on the surface before use. These oxidized groups are easier to connect with the coupling agent and then grafted to the fiber surface.

[0030] Preferably, in order to further improve the cutting resistance of the wear-resistant wire, inorganic reinforcing particles can be added to the modified liquid so that the self-lubricant is grafted onto the fiber wire and the inorganic reinforcing particles are also grafted onto the fiber wire, thereby improving the cutting resistance of the modified fiber wire.

[0031] Preferably, the processed ultra-high molecular weight polyethylene fiber filaments can be fibers (gel fibers) obtained through an extraction process of a solvent spinning process, or finished fibers after multi-stage heat drawing. After high-temperature curing and shaping treatment, the self-lubricant can be evenly grafted onto the fiber surface, thereby obtaining ultra-wear-resistant ultra-high molecular weight polyethylene fibers. The high-temperature curing and shaping process can also be subjected to heat drawing treatment to obtain finished fibers of the desired fineness. DETAILED DESCRIPTION

[0032] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below in conjunction with specific implementation methods.

[0033] Example 1

[0034] This embodiment is used to process the gel filaments obtained by the solvent spinning process through the extraction process, the ultra-high molecular weight polyethylene fibers with a molecular weight of 1.5-6 million, to obtain ultra-high molecular weight polyethylene wear-resistant filaments with a fineness of 400D. The modification method is as follows:

[0035] (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 graphite powder, add 2.0% LAS, stir and ultrasonicate for 30 minutes to obtain a modified solution.

[0036] (2) The gel fibers obtained in the extraction process are immersed in the modification solution for 4 minutes, and the temperature is raised to 80-85° C. and kept warm during the treatment process.

[0037] (3) The ultra-high molecular weight polyethylene gel filaments that have been soaked are subjected to three-stage heat drawing and curing at 137.5°C-147.5°C, with a drawing multiple of 18 times, to obtain ultra-high molecular weight polyethylene wear-resistant filaments with a fineness of 400D, which are recorded as wear-resistant filament-1#.

[0038] Example 2-11

[0039] Examples 2-11 are as follows: the graphite powder in Example 1 is replaced with an equal amount of graphene (Example 2), lead powder (Example 3), oleic acid amide (Example 4), molybdenum disulfide (Example 5), boron nitride (Example 6), polytetrafluoroethylene wax powder (Example 7), aramid powder (Example 8), silicone powder (Example 9), wollastonite (Example 10) and talcum powder (Example 11); other conditions and modification methods refer to Example 1; and finally wear-resistant wire-2#, wear-resistant wire-3#, wear-resistant wire-4#, wear-resistant wire-5#, wear-resistant wire-6#, wear-resistant wire-7#, wear-resistant wire-8#, wear-resistant wire-9#, wear-resistant wire-10#, and wear-resistant wire-11# are obtained respectively.

[0040] Example 12

[0041] In this embodiment, the graphene in Example 2 is pretreated with nitric acid of 68% by mass for 1 hour, and then the graphene is filtered out and dried to obtain graphene with some oxidized groups distributed on the surface. Then, the modification liquid is prepared according to the method of Example 1; other conditions and modification methods refer to Example 1; and finally, wear-resistant wire-12# with a fineness of 400D is obtained.

[0042] Embodiment 13

[0043] This embodiment is used to process finished ultra-high molecular weight polyethylene fiber with a fineness of 400D to obtain wear-resistant yarn; the molecular weight of ultra-high molecular weight polyethylene is 1.5-6 million. The modification method is as follows:

[0044] (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, stir and ultrasonicate for 35 minutes to obtain a modified solution.

[0045] (2) The finished ultra-high molecular weight polyethylene fiber with a fineness of 400D is immersed in the modification liquid for 3 minutes, and the treatment process is assisted by ultrasound.

[0046] (3) The ultra-high molecular weight polyethylene fiber filaments that have been immersed are heat-treated and solidified at 120° C., and the organic solvent on the fiber filaments is evaporated to obtain ultra-high molecular weight polyethylene wear-resistant wires with a fineness of 400D, which are recorded as wear-resistant wire-13#.

[0047] Embodiment 14

[0048] This embodiment is used to process the gel filaments obtained by the solvent spinning process through the extraction process, the ultra-high molecular weight polyethylene fibers with a molecular weight of 1.5-6 million, to obtain ultra-high molecular weight polyethylene wear-resistant filaments with a fineness of 400D. The modification method is as follows:

[0049] (1) A modified liquid was prepared according to the method of Example 1, and then 8% of nano-silicon dioxide was added to the modified liquid; the mixture was stirred and ultrasonicated for 30 minutes to obtain a modified liquid.

[0050] (2) The gel fibers obtained in the extraction process are immersed in the modification solution for 5 minutes, and the temperature is raised to 80-85° C. and kept warm during the treatment process.

[0051] (3) The ultra-high molecular weight polyethylene gel filaments that have been soaked are subjected to three-stage heat drawing and curing at 137.5°C-147.5°C, with a drawing ratio of 18 times, to obtain ultra-high molecular weight polyethylene wear-resistant filaments with a fineness of 400D, recorded as wear-resistant filament-14#.

[0052] Embodiment 15

[0053] This embodiment is used to process the gel yarn obtained by the solvent spinning process through the extraction process, the ultra-high molecular weight polyethylene fiber with a molecular weight of 1.5-6 million, to obtain an ultra-high molecular weight polyethylene wear-resistant yarn with a fineness of 400D. The modification method is as follows:

[0054] (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 graphite, 4 parts by weight of coupling agent KH-570, 3 parts by weight of coupling agent A151, and 2% BSDS, stir and ultrasonically treat for 30 minutes to obtain a modified solution.

[0055] (2) The gel fibers obtained in the extraction process are immersed in a modification solution for 3.5 minutes. During the treatment, the temperature is raised to 90-100° C. and a 7-fold heat stretch is performed.

[0056] (3) The ultra-high molecular weight polyethylene gel filaments that have been soaked are subjected to three-stage heat drawing and curing at 138°C-147°C, with a drawing ratio of 10 times, to obtain ultra-high molecular weight polyethylene wear-resistant filaments with a fineness of 400D, recorded as wear-resistant filament-15#.

[0057] Example 16

[0058] This embodiment is used to process the gel yarn obtained by the solvent spinning process through the extraction process, the high molecular weight polyethylene fiber with a molecular weight of 1.5-6 million, to obtain an ultra-high molecular weight polyethylene wear-resistant yarn with a fineness of 400D. The modification method is as follows:

[0059] (1) Take 60 parts by weight of dichloromethane, 3 parts by weight of coupling agent A151, 4 parts by weight of γ-glycidyloxypropyltrimethoxysilane, 8 parts by weight of molybdenum disulfide, add 2.0% of MSDS, stir and ultrasonicate for 40 minutes to obtain a modified solution.

[0060] (2) The gel fibers obtained in the extraction process are immersed in the modification solution for 4.5 minutes, and the temperature is raised to 80-85° C. and maintained during the treatment process.

[0061] (3) The ultra-high molecular weight polyethylene gel filaments that have been soaked are subjected to three-stage heat drawing and curing at 138°C-147°C, with a drawing multiple of 18 times, to obtain ultra-high molecular weight polyethylene wear-resistant filaments with a fineness of 400D, recorded as wear-resistant filament-16#.

[0062] Embodiment 17

[0063] This embodiment is used to process the gel yarn obtained by the solvent spinning process through the extraction process, the high molecular weight polyethylene fiber with a molecular weight of 1.5-6 million, to obtain an ultra-high molecular weight polyethylene wear-resistant yarn with a fineness of 400D. The modification method is as follows:

[0064] (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-glycidyloxypropyltrimethoxysilane, 8 parts by weight of wax emulsion (Hanwei Technology) + 1 part of molybdenum disulfide, stirred and ultrasonicated for 30 minutes to obtain a modified liquid.

[0065] (2) The gel fibers obtained in the extraction process are immersed in the modification solution for 25 seconds, and the temperature is raised to 80-85° C. and maintained during the treatment process.

[0066] (3) The ultra-high molecular weight polyethylene gel filaments that have been soaked are subjected to three-stage heat drawing and curing at 138°C-147°C, with a drawing ratio of 18 times, to obtain ultra-high molecular weight polyethylene wear-resistant filaments with a fineness of 400D, recorded as wear-resistant filament-17#.

[0067] Comparative Example 1

[0068] This comparative example is a 400D ultra-high molecular weight polyethylene finished fiber prepared by conventional spinning technology, and its molecular weight is 1.5-6 million.

[0069] Comparative Example 2

[0070] In this comparative example, based on Example 1, the solvent for preparing the modified liquid is replaced with 80 parts by weight of anhydrous ethanol that has no penetration effect on ultra-high molecular weight polyethylene; other conditions and modification methods are the same as those in Example 1, and fiber filaments with a fineness of 400D are obtained.

[0071] Comparative Example 3

[0072] This comparative example is based on Example 13, but without the heating treatment step S3. Other conditions and modification methods are the same as those of Example 13, and a fiber with a fineness of 400D is obtained.

[0073] According to the ASTM D6611 method standard, the ultra-high molecular weight polyethylene fiber filaments prepared by the above methods were subjected to a wear resistance test (Flory wear tester, pre-tension 60mN / tex), and the test results are as follows:

[0074]

[0075] From the above test results, we can see that

[0076] In summary, the fiber filaments prepared in Examples 1-17 of the present invention have better wear resistance data than the ultra-high molecular weight polyethylene finished fiber filaments prepared by conventional spinning technology in Comparative Example 1. In Comparative Example 2, when preparing the modifying liquid, anhydrous ethanol that has no penetration effect on ultra-high molecular weight polyethylene was used, resulting in very poor grafting performance of the self-lubricant on the fiber filaments, and the wear resistance of the fiber product was slightly improved. In Comparative Example 3, the heating and curing treatment was not carried out in time, resulting in the self-lubricant grafted on the fiber filaments being easy to fall off. Although the wear resistance of the fiber product is improved compared with Comparative Example 1, the wear resistance is much lower than that of the fiber filaments of Examples 1-17 of the present invention.

[0077] In Examples 1-11, when other production conditions and addition amounts are the same, compared with different self-lubricants, graphite powder has the best effect on enhancing wear resistance, followed by lead powder; polytetrafluoroethylene wax micropowder has the worst effect on increasing wear resistance. Example 12 Partially oxidizes graphene to increase dispersibility and grafting probability. More graphene can be grafted within the same immersion modification time, but the process of graphene oxidation may destroy the structure of graphene. Therefore, pre-oxidized graphene can improve the wear resistance of the fiber to a certain extent. Example 13 Compared with Example 5, the concentration of molybdenum disulfide in the modified liquid is lower, the immersion treatment time is shorter, and the wear resistance of the final fiber is not as good as that of Example 5. Example 14 Addition of inorganic reinforcing particles, the inorganic reinforcing particles do not improve the lubricity of the fiber, which will affect the grafting rate of the self-lubricant, so the wear resistance of the final fiber is slightly lower than that of Example 1, but the inorganic reinforcing particles can enhance the cutting resistance of the modified fiber. Compared with Example 1, the wear resistance data of Example 15 is reduced, mainly because the graphite concentration in the modified liquid of Example 15 is lower and the immersion treatment time is shorter. Compared with Example 5, the molybdenum disulfide concentration in the modified liquid of Example 16 is higher and the immersion modification is longer, so the wear resistance of the prepared fiber filaments is better. Example 17 can still have a good self-lubricating effect and wear resistance enhancement on the fiber filaments under a very short immersion treatment time.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fiber modification liquid, characterized in that: The invention contains a strong penetrating solvent, a coupling agent and a self-lubricant; the strong penetrating solvent is a solvent having a strong penetrating effect on ultra-high molecular weight polyethylene.

2. The fiber modification liquid according to claim 1, characterized in that: In the modified liquid, the mass ratio of the strong penetrating solvent, the coupling agent and the self-lubricant is 100-40:10-1:10-1; during the preparation of the modified liquid, at least one method of auxiliary stirring, ultrasound and megasonic physical treatment is used to make the components in the modified liquid evenly dispersed.

3. The fiber modification liquid according to claim 1 or 2, characterized in that: The strong penetrating solvent is a combination of an organic solvent used in ultra-high molecular weight polyethylene solvent spinning and an extractant used in the extraction process.

4. The fiber modification liquid according to claim 1 or 2, characterized in that: The strong penetrating solvent is one or a combination of two or more of dichloromethane, tetrachloroethylene, decahydronaphthalene, and hydrocarbon organic solvents.

5. The fiber modification liquid according to claim 1 or 2, characterized in that: The coupling agent is at least one of vinyl trichlorosilane, vinyl trimethoxysilane, vinyl triethoxysilane, γ-aminopropyl triethoxysilane, γ-methacryloxypropyl trimethoxysilane, γ-(2,3) epoxy (propoxy) propyl trimethoxysilane, γ-glycidyl ether oxygen propyl trimethoxysilane and γ-methacryloxypropyl trimethoxysilane.

6. The fiber modification liquid according to claim 1 or 2, characterized in that: The self-lubricant is at least one of graphite powder, graphene, lead powder, oleic acid amide, erucic acid amide, molybdenum disulfide, boron nitride, polyethylene wax powder, polytetrafluoroethylene wax powder, aramid powder, silicone powder, wax emulsion, wollastonite and talc.

7. The fiber modification liquid according to claim 1 or 2, characterized in that: Inorganic particles are also added into the modified liquid, and the inorganic particles are inorganic reinforcing particles.

8. The fiber modification liquid according to claim 1 or 2, characterized in that: A surfactant is also added to the modified liquid; the added amount of the surfactant is 1-5wt.%.

9. A method for modifying fiber filaments, characterized in that: The ultra-high molecular weight polyethylene fiber is soaked in the fiber modification liquid described in any one of claims 1 to 8; the fiber soaked in the modification liquid is then heat-treated, and the fiber is stretched 0 to 20 times during the heat treatment to obtain the wear-resistant wire.

10. The modification method according to claim 9, characterized in that: During the soaking of the ultra-high molecular weight polyethylene fiber filaments, the temperature is maintained at 80° C.-150° C., and the fiber filaments are simultaneously stretched at a stretching multiple of 1 to 10 times.

11. Use of the fiber modification liquid according to any one of claims 1 to 8 for enhancing the wear resistance of ultra-high molecular weight polyethylene fiber.

12. A wear-resistant fiber yarn, which is made by the modification method according to claim 9 or 10.

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