Cutting-resistant ultra-high molecular weight polyethylene fiber and preparation method thereof

Abstract

The invention relates to the technical field of polymer fibers, in particular to a cutting-resistant ultra-high molecular weight polyethylene fiber and a preparation method thereof.The cutting-resistant ultra-high molecular weight polyethylene fiber is prepared from organic silicon modified ultra-high molecular weight polyethylene and polyphenyl ether modified ultra-high molecular weight polyethylene as raw materials, and the performance of the fiber can be improved; the introduction of the organic silicon can enhance the flexibility and wear resistance of the material, the modification of the polyphenyl ether can improve the strength and rigidity of the material, and the modification of the organic silicon and the modification of the polyphenyl ether are favorable for improving the thermal stability and aging resistance of the material, so that the material can keep excellent performance in a high-temperature or severe environment; and secondly, the graphene oxide modified by the silane coupling agent, the carbon fibers and the hollow glass beads are added in the preparation of the ultra-high molecular weight polyethylene fiber, and the carbon fibers and the graphene oxide are used as high-strength and high-modulus fillers, so that the tensile strength and the cutting resistance of the fiber can be remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of polymer fibers, and in particular to a cut-resistant ultra-high molecular weight polyethylene fiber and a preparation method thereof. Background Art

[0002] Ultra-high molecular weight polyethylene fiber has been widely used in many industrial fields due to its excellent wear resistance, high strength, low density and chemical stability. However, with the advancement of technology and changes in market demand, higher requirements are placed on the cut resistance of fibers. Although traditional ultra-high molecular weight polyethylene fibers have excellent performance in wear resistance and strength, their cut resistance still needs to be improved when facing sharp cutting tools.

[0003] In order to enhance the cut resistance of ultra-high molecular weight polyethylene fibers, a common method is to introduce specific functional groups or polymer segments through chemical modification to improve the internal structure and surface properties of the fibers. However, these modification methods often need to be carried out under complex process conditions, and the modification effect is limited, making it difficult to meet the growing demand for cut resistance. In addition, the addition of fillers is also one of the effective ways to improve fiber performance. By introducing fillers with high strength, high modulus or special functions, such as carbon fiber, graphene oxide, etc., the tensile strength and cut resistance of the fiber can be significantly improved. However, the dispersibility of the filler and the interfacial bonding force with the matrix resin are the key factors affecting the filler modification effect. If the filler is unevenly dispersed or the interfacial bonding force is weak, it will not only fail to fully exert its reinforcing effect, but may also lead to a decrease in fiber performance.

[0004] Therefore, how to design a preparation method so that the prepared cut-resistant ultra-high molecular weight polyethylene fiber has better cut resistance while having more excellent performance has become a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0005] Technical issues solved In view of the above-mentioned shortcomings of the prior art, the present invention provides a cut-resistant ultra-high molecular weight polyethylene fiber and a preparation method thereof, which can effectively solve the problems of poor mechanical properties and cut resistance of the ultra-high molecular weight polyethylene fiber in the prior art.

[0006] Technical Solution To achieve the above objectives, the present invention is implemented through the following technical solutions: A cut-resistant ultra-high molecular weight polyethylene fiber, the cut-resistant ultra-high molecular weight polyethylene fiber is composed of the following components: organosilicon-modified ultra-high molecular weight polyethylene, polyphenylene ether-modified ultra-high molecular weight polyethylene, modified filler component, carbon black, silane coupling agent KH-560, perfluorotriethoxysilane, polyethylene wax and dopamine modification liquid; The organosilicon-modified ultra-high molecular weight polyethylene is prepared by grafting a silane coupling agent KH-570 onto an ultra-high molecular weight polyethylene using dicumyl peroxide as an initiator; The polyphenylene ether modified ultra-high molecular weight polyethylene is obtained by grafting ultra-high molecular weight polyethylene with polystyrene; The modified filler component is prepared by mixing graphene oxide, carbon fiber and hollow glass microspheres and then modifying them with a silane coupling agent KH-550; The dopamine modified liquid is prepared by taking trishydroxymethylaminomethane and dopamine hydrochloride as raw materials.

[0007] Furthermore, the preparation method of the organosilicon-modified ultra-high molecular weight polyethylene is: Dissolve 0.08g of diisopropylbenzene peroxide in 50mL of anhydrous ethanol, stir at a stirring speed of 500r / min for 10min, then add 0.25g of dibutyltin dilaurate and 0.5g of silane coupling agent KH-570 at a dropping rate of 2 drops / s, stir at a stirring speed of 300r / min for 10min, then add 50g of ultra-high molecular weight polyethylene, stir at a stirring speed of 800 / min for 30min, and then dry in an oven at 78°C for 2h to obtain silicone-modified ultra-high molecular weight polyethylene.

[0008] Furthermore, the preparation steps of the polyphenylene ether modified ultra-high molecular weight polyethylene are: Step 1, using a 120 kW electron accelerator as an irradiation source, pre-irradiating the ultra-high molecular weight polyethylene with β rays at room temperature and in an air atmosphere, and the obtained product is recorded as irradiated ultra-high molecular weight polyethylene; Step 2, weigh 300g of deionized water, 0.5g of sodium dodecyl sulfate, 45g of irradiated ultra-high molecular weight polyethylene, 45g of styrene and 0.5g of dibenzoyl peroxide, pour them into a reactor with an inner temperature of 60°C, heat to 90°C and stir to react, wash with deionized water 3 times and then dry to obtain polyphenylene ether modified ultra-high molecular weight polyethylene.

[0009] Furthermore, the irradiation conditions in step 1 are: acceleration voltage 3MeV, irradiation dose 16kGy, dose rate 7kGy / s, current 7.2mA, scan width 1.2m, beam length 7.5cm, transmission speed 4.8m / min, the specific operation of the stirring reaction in step 2 is stirring at a stirring speed of 50r / min for 9h, and the specific operation of the drying treatment in step 2 is drying in an oven at 80°C for 12h.

[0010] Furthermore, the preparation steps of the modified filler component are: Step a, graphene oxide, carbon fiber and hollow glass microspheres are mixed in a weight ratio of 1:5:2, stirred and mixed, and then placed in an oven at 160° C. and dried for 4 hours, and the obtained mixture is recorded as a filler component; Step b, dispersing 1g of silane coupling agent KH-550 in 300mL of anhydrous ethanol, adding 60g of filler component for mechanical stirring after uniform dispersion, filtering to remove the filtrate after ultrasonic dispersion and placing in an oven at 68°C to dry to constant weight, the obtained is the modified filler component.

[0011] Furthermore, the specific operation of stirring and mixing in step a is stirring at a stirring speed of 300 r / min for 10 min, the specific operation of uniform dispersion in step b is stirring at a stirring speed of 600 r / min for 10 min, the specific operation of mechanical stirring in step b is stirring at a stirring speed of 500 r / min for 30 min, and the specific operation of ultrasonic dispersion in step b is ultrasonic dispersion at a frequency of 28 kHz for 30 min.

[0012] Furthermore, the preparation method of the dopamine modified liquid is: Weigh 0.18 g of tris(hydroxymethyl)aminomethane) and 0.3 g of dopamine hydrochloride and dissolve them in 150 mL of deionized water. Stir at a stirring speed of 500 r / min for 10 min, then add 10% hydrochloric acid solution to adjust the pH value to 8.5. The result is the dopamine modified solution.

[0013] A method for preparing cut-resistant ultra-high molecular weight polyethylene fiber, the preparation method comprising: S1, pour 2 parts by weight of carbon black and 0.1-0.2 parts by weight of silane coupling agent KH-560 into a high-speed mixer and mix at high speed for 3 minutes, then add 45-50 parts by weight of organosilicon-modified ultra-high molecular weight polyethylene, 40-45 parts by weight of polyphenylene ether-modified ultra-high molecular weight polyethylene, 2-3 parts by weight of modified filler component, 0.2-0.3 parts by weight of perfluorotriethoxysilane and 1.8-2 parts by weight of polyethylene wax for mixing, then pour into an internal mixer for high-speed internal mixing and spin into a fiber component through a spinning machine; S2. Immerse the fiber component in a dopamine modified solution at a solid-liquid ratio of 1:20, shake at room temperature for 38 hours, filter and remove the filtrate, wash with deionized water three times, and then dry to obtain cut-resistant ultra-high molecular weight polyethylene fiber.

[0014] Furthermore, the stirring speed of the high-speed mixing in S1 is 800 r / min, the specific operation of the mixing treatment in S1 is mixing at a stirring speed of 1000 r / min for 5 minutes, and the specific operation of the high-speed kneading in S1 is mixing at a stirring speed of 50 r / min for 10 minutes at a temperature of 210°C.

[0015] Furthermore, the specific operation of the drying treatment in S2 is to place it in an oven at 78° C. and dry it for 12 hours.

[0016] Beneficial Effects The present invention provides a cut-resistant ultra-high molecular weight polyethylene fiber and a preparation method thereof. Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention uses organosilicon-modified ultra-high molecular weight polyethylene and polyphenylene ether-modified ultra-high molecular weight polyethylene as raw materials to prepare cut-resistant ultra-high molecular weight polyethylene fibers, which can improve the performance of the fibers. The introduction of organosilicon can enhance the flexibility and wear resistance of the material, while the modification of polyphenylene ether can improve the strength and rigidity of the material. Moreover, the modification of organosilicon and polyphenylene ether helps to improve the thermal stability and aging resistance of the material, so that it can maintain excellent performance under high temperature or harsh environment. Secondly, graphene oxide, carbon fiber and hollow glass microspheres modified by silane coupling agent are added to the preparation of ultra-high molecular weight polyethylene fibers. Carbon fiber and graphene oxide are used as high-strength and high-modulus fillers, which can significantly improve the tensile strength and cut resistance of the fiber, while the addition of hollow glass microspheres can reduce the density while maintaining the strength of the material, thereby improving the lightweight performance of the material.

[0017] 2. The addition of carbon black and silane coupling agent KH-560 in the present invention can improve the dispersibility and processing fluidity of the material, making the fiber more uniform during the preparation process. The addition of perfluorotriethoxysilane and polyethylene wax helps to adjust the surface properties and lubricity of the material, and can improve the spinning efficiency and quality of the fiber. Secondly, immersing the prepared fiber components in dopamine modified liquid can enable the dopamine modified liquid to form a firm adhesion layer on the fiber surface through chemical bonding, thereby improving the bonding and adhesion between the fiber and other materials. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The present invention will be further described below in conjunction with the embodiments.

[0020] A cut-resistant ultra-high molecular weight polyethylene fiber of this embodiment, the cut-resistant ultra-high molecular weight polyethylene fiber is composed of the following components: organosilicon-modified ultra-high molecular weight polyethylene, polyphenylene ether-modified ultra-high molecular weight polyethylene, modified filler component, carbon black, silane coupling agent KH-560, perfluorotriethoxysilane, polyethylene wax and dopamine modification liquid; The organosilicon-modified ultra-high molecular weight polyethylene is prepared by grafting a silane coupling agent KH-570 onto an ultra-high molecular weight polyethylene using dicumyl peroxide as an initiator; The preparation method of organosilicon-modified ultra-high molecular weight polyethylene is as follows: Dissolve 0.08g of diisopropylbenzene peroxide in 50mL of anhydrous ethanol, stir at a stirring speed of 500r / min for 10min, then add 0.25g of dibutyltin dilaurate and 0.5g of silane coupling agent KH-570 at a dropping rate of 2 drops / s, stir at a stirring speed of 300r / min for 10min, then add 50g of ultra-high molecular weight polyethylene, stir at a stirring speed of 800 / min for 30min, and then dry in an oven at 78°C for 2h to obtain silicone-modified ultra-high molecular weight polyethylene.

[0021] The polyphenylene ether modified ultra-high molecular weight polyethylene is obtained by grafting ultra-high molecular weight polyethylene with polystyrene; The preparation steps of polyphenylene ether modified ultra-high molecular weight polyethylene are as follows: Step 1, using a 120kW electron accelerator as an irradiation source, pre-irradiating the ultra-high molecular weight polyethylene with β rays at room temperature and air atmosphere, the obtained ultra-high molecular weight polyethylene is recorded as irradiated ultra-high molecular weight polyethylene, and the irradiation conditions are: acceleration voltage 3MeV, irradiation dose 16kGy, dose rate 7kGy / s, current 7.2mA, scanning width 1.2m, beam length 7.5cm, transmission speed 4.8m / min; Step 2: weigh 300 g of deionized water, 0.5 g of sodium dodecyl sulfate, 45 g of irradiated ultra-high molecular weight polyethylene, 45 g of styrene and 0.5 g of dibenzoyl peroxide, pour them into a reactor with an inner temperature of 60 ° C, heat to 90 ° C and stir at a stirring speed of 50 r / min for 9 hours, wash with deionized water three times and place in an oven at 80 ° C for 12 hours to obtain polyphenylene ether modified ultra-high molecular weight polyethylene.

[0022] The modified filler component is prepared by mixing graphene oxide, carbon fiber and hollow glass microspheres and then modifying them with a silane coupling agent KH-550; The preparation steps of the modified filler component are: Step a, graphene oxide, carbon fiber and hollow glass microspheres are mixed in a weight ratio of 1:5:2, stirred at a stirring speed of 300 r / min for 10 min, and then placed in an oven at 160° C. for 4 h, and the obtained mixture is recorded as a filler component; Step b, disperse 1g of silane coupling agent KH-550 in 300mL of anhydrous ethanol, stir at a stirring speed of 600r / min for 10min, add 60g of filler component and stir at a stirring speed of 500r / min for 30min, ultrasonically disperse at a frequency of 28kHz for 30min, filter to remove the filtrate and place in an oven at 68°C to dry to constant weight, and the resulting modified filler component.

[0023] The dopamine modified liquid is prepared using tris(hydroxymethyl)aminomethane and dopamine hydrochloride as raw materials; The preparation method of dopamine modified liquid is: Weigh 0.18 g of tris(hydroxymethyl)aminomethane) and 0.3 g of dopamine hydrochloride and dissolve them in 150 mL of deionized water. Stir at a stirring speed of 500 r / min for 10 min, then add 10% hydrochloric acid solution to adjust the pH value to 8.5. The result is the dopamine modified solution.

[0024] A method for preparing cut-resistant ultra-high molecular weight polyethylene fiber, the preparation method comprising: S1, pour 2 parts by weight of carbon black and 0.1 parts by weight of silane coupling agent KH-560 into a high-speed mixer and mix at a stirring speed of 800r / min for 3min, then add 45 parts by weight of organosilicon-modified ultra-high molecular weight polyethylene, 40 parts by weight of polyphenylene ether-modified ultra-high molecular weight polyethylene, 2 parts by weight of modified filler component, 0.2 parts by weight of perfluorotriethoxysilane and 1.8 parts by weight of polyethylene wax and mix at a stirring speed of 1000r / min for 5min, then pour into an internal mixer and mix at a temperature of 210°C at a stirring speed of 50r / min for 10min, and then spin into a fiber component through a spinning machine; S2. Immerse the fiber component in dopamine modified liquid at a solid-liquid ratio of 1:20, shake at room temperature for 38 hours, filter and remove the filtrate, wash with deionized water three times, and dry in an oven at 78°C for 12 hours to obtain cut-resistant ultra-high molecular weight polyethylene fiber.

[0025] A cut-resistant ultra-high molecular weight polyethylene fiber of this embodiment, the cut-resistant ultra-high molecular weight polyethylene fiber is composed of the following components: organosilicon-modified ultra-high molecular weight polyethylene, polyphenylene ether-modified ultra-high molecular weight polyethylene, modified filler component, carbon black, silane coupling agent KH-560, perfluorotriethoxysilane, polyethylene wax and dopamine modification liquid; The organosilicon-modified ultra-high molecular weight polyethylene is prepared by grafting a silane coupling agent KH-570 onto an ultra-high molecular weight polyethylene using dicumyl peroxide as an initiator; The preparation method of organosilicon-modified ultra-high molecular weight polyethylene is as follows: Dissolve 0.08g of diisopropylbenzene peroxide in 50mL of anhydrous ethanol, stir at a stirring speed of 500r / min for 10min, then add 0.25g of dibutyltin dilaurate and 0.5g of silane coupling agent KH-570 at a dropping rate of 2 drops / s, stir at a stirring speed of 300r / min for 10min, then add 50g of ultra-high molecular weight polyethylene, stir at a stirring speed of 800 / min for 30min, and then dry in an oven at 78°C for 2h to obtain silicone-modified ultra-high molecular weight polyethylene.

[0026] The polyphenylene ether modified ultra-high molecular weight polyethylene is obtained by grafting ultra-high molecular weight polyethylene with polystyrene; The preparation steps of polyphenylene ether modified ultra-high molecular weight polyethylene are as follows: Step 1, using a 120kW electron accelerator as an irradiation source, pre-irradiating the ultra-high molecular weight polyethylene with β rays at room temperature and air atmosphere, the obtained ultra-high molecular weight polyethylene is recorded as irradiated ultra-high molecular weight polyethylene, and the irradiation conditions are: acceleration voltage 3MeV, irradiation dose 16kGy, dose rate 7kGy / s, current 7.2mA, scanning width 1.2m, beam length 7.5cm, transmission speed 4.8m / min; Step 2: weigh 300 g of deionized water, 0.5 g of sodium dodecyl sulfate, 45 g of irradiated ultra-high molecular weight polyethylene, 45 g of styrene and 0.5 g of dibenzoyl peroxide, pour them into a reactor with an inner temperature of 60 ° C, heat to 90 ° C and stir at a stirring speed of 50 r / min for 9 hours, wash with deionized water three times and place in an oven at 80 ° C for 12 hours to obtain polyphenylene ether modified ultra-high molecular weight polyethylene.

[0027] The modified filler component is prepared by mixing graphene oxide, carbon fiber and hollow glass microspheres and then modifying them with a silane coupling agent KH-550; The preparation steps of the modified filler component are: Step a, graphene oxide, carbon fiber and hollow glass microspheres are mixed in a weight ratio of 1:5:2, stirred at a stirring speed of 300 r / min for 10 min, and then placed in an oven at 160° C. for 4 h, and the obtained mixture is recorded as a filler component; Step b, disperse 1g of silane coupling agent KH-550 in 300mL of anhydrous ethanol, stir at a stirring speed of 600r / min for 10min, add 60g of filler component and stir at a stirring speed of 500r / min for 30min, ultrasonically disperse at a frequency of 28kHz for 30min, filter to remove the filtrate and place in an oven at 68°C to dry to constant weight, and the resulting modified filler component.

[0028] The dopamine modified liquid is prepared using tris(hydroxymethyl)aminomethane and dopamine hydrochloride as raw materials; The preparation method of dopamine modified liquid is: Weigh 0.18 g of tris(hydroxymethyl)aminomethane) and 0.3 g of dopamine hydrochloride and dissolve them in 150 mL of deionized water. Stir at a stirring speed of 500 r / min for 10 min, then add 10% hydrochloric acid solution to adjust the pH value to 8.5. The result is the dopamine modified solution.

[0029] A method for preparing cut-resistant ultra-high molecular weight polyethylene fiber, the preparation method comprising: S1, pour 2 parts by weight of carbon black and 0.2 parts by weight of silane coupling agent KH-560 into a high-speed mixer and mix at a stirring speed of 800r / min for 3min, then add 50 parts by weight of organosilicon-modified ultra-high molecular weight polyethylene, 45 parts by weight of polyphenylene ether-modified ultra-high molecular weight polyethylene, 3 parts by weight of modified filler component, 0.3 parts by weight of perfluorotriethoxysilane and 2 parts by weight of polyethylene wax and mix at a stirring speed of 1000r / min for 5min, then pour into an internal mixer and mix at a temperature of 210°C at a stirring speed of 50r / min for 10min, and then spin into a fiber component through a spinning machine; S2. Immerse the fiber component in dopamine modified liquid at a solid-liquid ratio of 1:20, shake at room temperature for 38 hours, filter and remove the filtrate, wash with deionized water three times, and dry in an oven at 78°C for 12 hours to obtain cut-resistant ultra-high molecular weight polyethylene fiber.

[0030] A cut-resistant ultra-high molecular weight polyethylene fiber of this embodiment, the cut-resistant ultra-high molecular weight polyethylene fiber is composed of the following components: organosilicon-modified ultra-high molecular weight polyethylene, polyphenylene ether-modified ultra-high molecular weight polyethylene, modified filler component, carbon black, silane coupling agent KH-560, perfluorotriethoxysilane, polyethylene wax and dopamine modification liquid; The organosilicon-modified ultra-high molecular weight polyethylene is prepared by grafting a silane coupling agent KH-570 onto an ultra-high molecular weight polyethylene using dicumyl peroxide as an initiator; The preparation method of organosilicon-modified ultra-high molecular weight polyethylene is as follows: Dissolve 0.08g of diisopropylbenzene peroxide in 50mL of anhydrous ethanol, stir at a stirring speed of 500r / min for 10min, then add 0.25g of dibutyltin dilaurate and 0.5g of silane coupling agent KH-570 at a dropping rate of 2 drops / s, stir at a stirring speed of 300r / min for 10min, then add 50g of ultra-high molecular weight polyethylene, stir at a stirring speed of 800 / min for 30min, and then dry in an oven at 78°C for 2h to obtain silicone-modified ultra-high molecular weight polyethylene.

[0031] The polyphenylene ether modified ultra-high molecular weight polyethylene is obtained by grafting ultra-high molecular weight polyethylene with polystyrene; The preparation steps of polyphenylene ether modified ultra-high molecular weight polyethylene are as follows: Step 1, using a 120kW electron accelerator as an irradiation source, pre-irradiating the ultra-high molecular weight polyethylene with β rays at room temperature and air atmosphere, the obtained ultra-high molecular weight polyethylene is recorded as irradiated ultra-high molecular weight polyethylene, and the irradiation conditions are: acceleration voltage 3MeV, irradiation dose 16kGy, dose rate 7kGy / s, current 7.2mA, scanning width 1.2m, beam length 7.5cm, transmission speed 4.8m / min; Step 2: weigh 300 g of deionized water, 0.5 g of sodium dodecyl sulfate, 45 g of irradiated ultra-high molecular weight polyethylene, 45 g of styrene and 0.5 g of dibenzoyl peroxide, pour them into a reactor with an inner temperature of 60 ° C, heat to 90 ° C and stir at a stirring speed of 50 r / min for 9 hours, wash with deionized water three times and place in an oven at 80 ° C for 12 hours to obtain polyphenylene ether modified ultra-high molecular weight polyethylene.

[0032] The modified filler component is prepared by mixing graphene oxide, carbon fiber and hollow glass microspheres and then modifying them with a silane coupling agent KH-550; The preparation steps of the modified filler component are: Step a, graphene oxide, carbon fiber and hollow glass microspheres are mixed in a weight ratio of 1:5:2, stirred at a stirring speed of 300 r / min for 10 min, and then placed in an oven at 160° C. for 4 h, and the obtained mixture is recorded as a filler component; Step b, disperse 1g of silane coupling agent KH-550 in 300mL of anhydrous ethanol, stir at a stirring speed of 600r / min for 10min, add 60g of filler component and stir at a stirring speed of 500r / min for 30min, ultrasonically disperse at a frequency of 28kHz for 30min, filter to remove the filtrate and place in an oven at 68°C to dry to constant weight, and the resulting modified filler component.

[0033] The dopamine modified liquid is prepared using tris(hydroxymethyl)aminomethane and dopamine hydrochloride as raw materials; The preparation method of dopamine modified liquid is: Weigh 0.18 g of tris(hydroxymethyl)aminomethane) and 0.3 g of dopamine hydrochloride and dissolve them in 150 mL of deionized water. Stir at a stirring speed of 500 r / min for 10 min, then add 10% hydrochloric acid solution to adjust the pH value to 8.5. The result is the dopamine modified solution.

[0034] A method for preparing cut-resistant ultra-high molecular weight polyethylene fiber, the preparation method comprising: S1, pour 2 parts by weight of carbon black and 0.2 parts by weight of silane coupling agent KH-560 into a high-speed mixer and mix at a stirring speed of 800r / min for 3min, then add 48 parts by weight of organosilicon-modified ultra-high molecular weight polyethylene, 43 parts by weight of polyphenylene ether-modified ultra-high molecular weight polyethylene, 2 parts by weight of modified filler component, 0.3 parts by weight of perfluorotriethoxysilane and 1.9 parts by weight of polyethylene wax and mix at a stirring speed of 1000r / min for 5min, then pour into an internal mixer and mix at a temperature of 210°C at a stirring speed of 50r / min for 10min, and then spin into a fiber component through a spinning machine; S2. Immerse the fiber component in dopamine modified liquid at a solid-liquid ratio of 1:20, shake at room temperature for 38 hours, filter and remove the filtrate, wash with deionized water three times, and dry in an oven at 78°C for 12 hours to obtain cut-resistant ultra-high molecular weight polyethylene fiber.

[0035] Comparative Example 1 The cut-resistant ultra-high molecular weight polyethylene fiber and its preparation method provided in this comparative example are substantially the same as those in Example 1, with the main difference being that in this comparative example 1, the silicone-modified ultra-high molecular weight polyethylene in Example 1 is replaced with polyphenylene ether-modified ultra-high molecular weight polyethylene.

[0036] Comparative Example 2 The cut-resistant ultra-high molecular weight polyethylene fiber and its preparation method provided in this comparative example are substantially the same as those in Example 1, with the main difference being that in this comparative example 2, the polyphenylene ether-modified ultra-high molecular weight polyethylene in Example 1 is replaced with silicone-modified ultra-high molecular weight polyethylene.

[0037] Comparative Example 3 The cut-resistant ultra-high molecular weight polyethylene fiber and the preparation method thereof provided in this comparative example are substantially the same as those in Example 1, with the main difference being that in this comparative example 3, the modified filler component in Example 1 is replaced with carbon fiber.

[0038] Comparative Example 4 The cut-resistant ultra-high molecular weight polyethylene fiber and the preparation method thereof provided in this comparative example are substantially the same as those in Example 1, with the main difference being that in this comparative example 4, the modified filler component in Example 1 is replaced with carbon black.

[0039] Performance Testing The cut-resistant ultra-high molecular weight polyethylene fibers prepared in Examples 1-3 and Comparative Examples 1-3 are marked as Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, Comparative Example 3 and Comparative Example 4, respectively. Then, the performances of Examples 1-3 and Comparative Examples 1-4 are tested. The specific testing methods and test items are as follows: 1. The cut-resistant ultra-high molecular weight polyethylene fibers of Examples 1-3 and Comparative Examples 1-4 were respectively wound along the bobbin in the forward and reverse directions to prepare 400D cut-resistant yarns, and then the prepared cut-resistant yarns were coated and woven to obtain cut-resistant industrial gloves. According to the European standard EN388 for industrial gloves protection, the gloves were tested for cut resistance and the number of penetrations was measured. Two samples were taken each time and the measurement was performed five times. The average value was calculated according to the coefficient, and the obtained data were recorded in the following table; 2. The strength, elongation at break and modulus of Examples 1-3 and Comparative Examples 1-4 were tested with reference to the standard of GB / T19975-2005, and the obtained data are recorded in the following table; It can be seen from the data in the above table that the cut-resistant ultra-high molecular weight polyethylene fibers in Examples 1-3 have significantly better performance and better cut resistance than those in Comparative Examples 1-4. This indicates that in the process of preparing cut-resistant ultra-high molecular weight polyethylene fibers, adding silicone-modified ultra-high molecular weight polyethylene, polyphenylene ether-modified ultra-high molecular weight polyethylene, modified filler components and carbon black at the same time can improve fiber performance.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cut-resistant ultra-high molecular weight polyethylene fiber, characterized in that: The cut-resistant ultra-high molecular weight polyethylene fiber is composed of the following components: organic silicon-modified ultra-high molecular weight polyethylene, polyphenylene ether-modified ultra-high molecular weight polyethylene, modified filler component, carbon black, silane coupling agent KH-560, perfluorotriethoxysilane, polyethylene wax and dopamine modification liquid; The organosilicon-modified ultra-high molecular weight polyethylene is prepared by grafting a silane coupling agent KH-570 onto an ultra-high molecular weight polyethylene using dicumyl peroxide as an initiator; The polyphenylene ether modified ultra-high molecular weight polyethylene is obtained by grafting ultra-high molecular weight polyethylene with polystyrene; The modified filler component is prepared by mixing graphene oxide, carbon fiber and hollow glass microspheres and then modifying them with a silane coupling agent KH-550; The dopamine modified liquid is prepared by taking trishydroxymethylaminomethane and dopamine hydrochloride as raw materials.

2. The cut-resistant ultra-high molecular weight polyethylene fiber according to claim 1, characterized in that: The preparation method of the organosilicon-modified ultra-high molecular weight polyethylene is as follows: Dissolve 0.08g of diisopropylbenzene peroxide in 50mL of anhydrous ethanol, stir at a stirring speed of 500r / min for 10min, then add 0.25g of dibutyltin dilaurate and 0.5g of silane coupling agent KH-570 at a dropping rate of 2 drops / s, stir at a stirring speed of 300r / min for 10min, then add 50g of ultra-high molecular weight polyethylene, stir at a stirring speed of 800 / min for 30min, and then dry in an oven at 78°C for 2h to obtain silicone-modified ultra-high molecular weight polyethylene.

3. The cut-resistant ultra-high molecular weight polyethylene fiber according to claim 1, characterized in that: The preparation steps of the polyphenylene ether modified ultra-high molecular weight polyethylene are: Step 1, using a 120 kW electron accelerator as an irradiation source, pre-irradiating the ultra-high molecular weight polyethylene with β rays at room temperature and in an air atmosphere, and the obtained product is recorded as irradiated ultra-high molecular weight polyethylene; Step 2, weigh 300g of deionized water, 0.5g of sodium dodecyl sulfate, 45g of irradiated ultra-high molecular weight polyethylene, 45g of styrene and 0.5g of dibenzoyl peroxide, pour them into a reactor with an inner temperature of 60°C, heat to 90°C and stir to react, wash with deionized water 3 times and then dry to obtain polyphenylene ether modified ultra-high molecular weight polyethylene.

4. The cut-resistant ultra-high molecular weight polyethylene fiber according to claim 3, characterized in that: The irradiation conditions in step 1 are: acceleration voltage 3MeV, irradiation dose 16kGy, dose rate 7kGy / s, current 7.2mA, scan width 1.2m, beam length 7.5cm, transmission speed 4.8m / min, the specific operation of the stirring reaction in step 2 is stirring at a stirring speed of 50r / min for 9h, and the specific operation of the drying treatment in step 2 is drying in an oven at 80°C for 12h.

5. The cut-resistant ultra-high molecular weight polyethylene fiber according to claim 1, characterized in that: The preparation steps of the modified filler component are: Step a, graphene oxide, carbon fiber and hollow glass microspheres are mixed in a weight ratio of 1:5:2, stirred and mixed, and then placed in an oven at 160° C. and dried for 4 hours, and the obtained mixture is recorded as a filler component; Step b, dispersing 1g of silane coupling agent KH-550 in 300mL of anhydrous ethanol, adding 60g of filler component for mechanical stirring after uniform dispersion, filtering to remove the filtrate after ultrasonic dispersion and placing in an oven at 68°C to dry to constant weight, the obtained is the modified filler component.

6. The cut-resistant ultra-high molecular weight polyethylene fiber according to claim 5, characterized in that: The specific operation of stirring and mixing in step a is stirring at a stirring speed of 300 r / min for 10 min, the specific operation of uniform dispersion in step b is stirring at a stirring speed of 600 r / min for 10 min, the specific operation of mechanical stirring in step b is stirring at a stirring speed of 500 r / min for 30 min, and the specific operation of ultrasonic dispersion in step b is ultrasonic dispersion at a frequency of 28 kHz for 30 min.

7. The cut-resistant ultra-high molecular weight polyethylene fiber according to claim 1, characterized in that: The preparation method of the dopamine modified liquid is: Weigh 0.18 g of tris(hydroxymethyl)aminomethane) and 0.3 g of dopamine hydrochloride and dissolve them in 150 mL of deionized water. Stir at a stirring speed of 500 r / min for 10 min, then add 10% hydrochloric acid solution to adjust the pH value to 8.

5. The result is the dopamine modified solution.

8. The method for preparing a cut-resistant ultra-high molecular weight polyethylene fiber according to any one of claims 1 to 7, characterized in that: The preparation method is: S1, pour 2 parts by weight of carbon black and 0.1-0.2 parts by weight of silane coupling agent KH-560 into a high-speed mixer and mix at high speed for 3 minutes, then add 45-50 parts by weight of organosilicon-modified ultra-high molecular weight polyethylene, 40-45 parts by weight of polyphenylene ether-modified ultra-high molecular weight polyethylene, 2-3 parts by weight of modified filler component, 0.2-0.3 parts by weight of perfluorotriethoxysilane and 1.8-2 parts by weight of polyethylene wax for mixing, then pour into an internal mixer for high-speed internal mixing and spin into a fiber component through a spinning machine; S2. Immerse the fiber component in a dopamine modified solution at a solid-liquid ratio of 1:20, shake at room temperature for 38 hours, filter and remove the filtrate, wash with deionized water three times, and then dry to obtain cut-resistant ultra-high molecular weight polyethylene fiber.

9. The method for preparing a cut-resistant ultra-high molecular weight polyethylene fiber according to claim 8, characterized in that: The stirring speed of high-speed mixing in S1 is 800 r / min, the specific operation of the mixing treatment in S1 is mixing at a stirring speed of 1000 r / min for 5 min, and the specific operation of high-speed kneading in S1 is mixing at a stirring speed of 50 r / min for 10 min at a temperature of 210°C.

10. The method for preparing cut-resistant ultra-high molecular weight polyethylene fiber according to claim 8, characterized in that: The specific operation of the drying treatment in S2 is to place it in an oven at 78°C and dry it for 12 hours.

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