Ultra-high molecular weight polyethylene fibers and methods of making and using the same

Abstract

The application relates to the field of fiber preparation, and discloses a kind of ultra-high molecular weight polyethylene fibers with adsorption and its preparation method and application, the raw material of the ultra-high molecular weight polyethylene fiber prepared includes ultra-high molecular weight polyethylene powder, antioxidant and filler;Wherein, the antioxidant is 0.2-1wt% of the ultra-high molecular weight polyethylene powder, and the filler is 0.5-3wt% of the ultra-high molecular weight polyethylene powder;Wherein, the filler is obtained by reacting metal salt and polybasic acid organic ligand dissolved in a first solvent, using the technical scheme provided by the application, the ultra-high molecular weight polyethylene powder has good corrosion resistance, the adsorption performance of ultra-high molecular weight polyethylene is improved by filler, the ultra-high molecular weight polyethylene fiber with adsorption is prepared, the specific strength is high, the specific modulus is high, and the adsorption capacity is as high as 200-600mg / g.

Description

Technical Field

[0001] This invention relates to the field of fiber preparation, specifically to an ultra-high molecular weight polyethylene fiber with adsorption properties, its preparation method, and its application. Background Technology

[0002] Adsorption is a novel wastewater treatment method. However, traditional carriers such as polyester and acrylic fibers are not corrosion-resistant, have low strength, and are easily damaged during use, which limits the application of this method to some extent. Therefore, it is necessary to develop materials that are corrosion-resistant and have adsorption properties.

[0003] Ultra-high molecular weight polyethylene (UHMWPE) fiber has excellent mechanical properties such as light weight, corrosion resistance, high specific strength, and high specific modulus, as well as stable chemical properties. It has attracted attention from various countries and is widely used in aerospace, military bulletproof equipment, aquaculture, sporting goods and other fields. At present, there is no research on the application of UHMWPE fiber in wastewater treatment. Summary of the Invention

[0004] The purpose of this invention is to overcome the problems of traditional adsorption materials in the prior art, such as poor corrosion resistance and low strength, and to provide an ultra-high molecular weight polyethylene fiber with adsorption properties, its preparation method, and its applications. The ultra-high molecular weight polyethylene fiber prepared by this method has good adsorption capacity, and due to the addition of ultra-high molecular weight polyethylene fiber, the material also has good corrosion resistance.

[0005] To achieve the above objectives, the first aspect of the present invention provides an ultra-high molecular weight polyethylene fiber, comprising ultra-high molecular weight polyethylene powder, an antioxidant, and a filler, wherein the antioxidant accounts for 0.2-1 wt% of the ultra-high molecular weight polyethylene powder, and the filler accounts for 0.5-3 wt% of the ultra-high molecular weight polyethylene powder; wherein the filler is obtained by reacting a metal salt and a polybasic acid organic ligand dissolved in a first solvent.

[0006] The second aspect of the present invention provides a method for preparing ultra-high molecular weight polyethylene fiber, wherein a spinning solution containing a second solvent, ultra-high molecular weight polyethylene powder, antioxidant, and filler is spun to obtain the ultra-high molecular weight polyethylene fiber.

[0007] The third aspect of this invention provides an application of ultra-high molecular weight polyethylene fiber in wastewater treatment.

[0008] Using the technical solution provided by this invention, ultra-high molecular weight polyethylene powder has good corrosion resistance. By using fillers to improve the adsorption performance of ultra-high molecular weight polyethylene, ultra-high molecular weight polyethylene fibers with adsorption function are prepared, which have high specific strength and high specific modulus, and their adsorption capacity is as high as 200-600 mg / g. Detailed Implementation

[0009] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0010] The first aspect of the present invention provides an ultra-high molecular weight polyethylene fiber, wherein the raw materials for obtaining the ultra-high molecular weight polyethylene fiber include ultra-high molecular weight polyethylene powder, an antioxidant, and a filler; wherein the antioxidant accounts for 0.2-1 wt% of the ultra-high molecular weight polyethylene powder, and the filler accounts for 0.5-3 wt% of the ultra-high molecular weight polyethylene powder; wherein the filler is obtained by reacting a metal salt and a polybasic acid organic ligand dissolved in a first solvent.

[0011] The content of ultra-high molecular weight polyethylene (UHMWPE) powder directly affects the product's strength and modulus, while the content of filler directly affects the product's adsorption capacity. Based on the total amount of UHMWPE powder, the antioxidant can be any value within the range of any two numbers formed by combining 0.2%, 0.5%, 0.8%, and 1% of the UHMWPE powder, and the filler can be any value within the range of any two numbers formed by combining 0.5%, 1%, 1.5%, 2%, 2.5%, and 3% of the UHMWPE powder. In some embodiments of the present invention, UHMWPE powder with a weight-average molecular weight of 4 million to 4.5 million g / mol is selected.

[0012] In some embodiments of the present invention, preferably, based on the total amount of the ultra-high molecular weight polyethylene powder, the antioxidant accounts for 0.6-0.8 wt% of the ultra-high molecular weight polyethylene powder, and the filler accounts for 2-3 wt% of the ultra-high molecular weight polyethylene. The antioxidant can be any value within the range of any two numbers formed by combining 0.6%, 0.7%, and 0.8% of the ultra-high molecular weight polyethylene powder, and the antioxidant can be any value within the range of any two numbers formed by combining 2%, 2.2%, 2.5%, 2.8%, and 3% of the ultra-high molecular weight polyethylene.

[0013] In some embodiments of the present invention, preferably, the ultra-high molecular weight polyethylene fiber has an adsorption capacity of 200-600 mg / g, a strength of 25-40 cN / dtex, a modulus of 1300-1600 cN / dtex, and a melting temperature of 140-150℃. Adsorption capacity refers to the mass of dye solution adsorbed by a unit mass of ultra-high molecular weight polyethylene fiber at 30℃ for 10 hours; the dye solution used is generally methylene blue. The adsorption capacity of ultra-high molecular weight polyethylene fiber can be any value within the range of any two numbers formed by 200 mg / g, 300 mg / g, 400 mg / g, 500 mg / g, and 600 mg / g; the strength can be any value within the range of any two numbers formed by 25 cN / dtex, 30 cN / dtex, 35 cN / dtex, and 40 cN / dtex; and the modulus can be any value within the range of any two numbers formed by 1300 cN / dtex, 1400 cN / dtex, 1500 cN / dtex, and 1600 cN / dtex. Strength and modulus are determined according to GB / T 14344-2008 standard, and melting temperature is determined according to GB / T 19466.3-2004 standard.

[0014] In this invention, the filler is obtained by reacting a metal salt and a polybasic acid organic ligand dissolved in a first solvent. Specifically, this may involve dissolving 1-5 parts by weight of polyvinylpyrrolidone in 100 mL of the first solvent, heating and stirring, then adding the metal salt and polybasic acid, continuing the reaction at 110-130°C for 0.5-3 h, followed by centrifugation and washing to obtain the filler.

[0015] In some embodiments of the present invention, preferably, the first solvent is a mixed solution of ethanol and N,N-dimethylformamide, wherein the volume ratio of ethanol to N,N-dimethylformamide is 3:7-7:3.

[0016] In some embodiments of the present invention, preferably, the metal salt is selected from at least one of zinc salts, copper salts, cobalt salts, and nickel salts. The selected metal salt needs to be readily soluble in the first solvent.

[0017] In other embodiments of the present invention, preferably, the zinc salt is selected from at least one of zinc nitrate, zinc acetate, and zinc chloride; the copper salt is selected from at least one of copper nitrate, copper acetate, and copper chloride; the cobalt salt is selected from at least one of cobalt nitrate, cobalt acetate, and cobalt chloride; and the nickel salt is selected from at least one of nickel nitrate, nickel acetate, and cobalt chloride.

[0018] In some embodiments of the present invention, preferably, the polybasic acid organic ligand is selected from at least one of terephthalic acid, 1,4-naphthalenedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, 2,2'-biphenyl dicarboxylic acid, 2,5-dihydroxyterephthalic acid, and 3,3',5,5'-biphenyltetracarboxylic acid. The choice of metal salt and organic ligand in the preparation of the packing material directly affects the adsorption performance of the product, with packing materials prepared from terephthalic acid, 1,4-naphthalenedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, and the selected metal salt exhibiting particularly superior adsorption performance.

[0019] In some embodiments of the present invention, preferably, the metal salt is 0.1-0.5 parts by weight, and the polybasic acid organic ligand is 0.05-0.3 parts by weight. Generally speaking, for the same type, the more parts of the metal salt, the stronger the absorption capacity of the obtained filler. The number of parts of the metal salt can be any value within the range formed by any two of the following values: 0.1, 0.2, 0.3, 0.4, and 0.5. The number of parts of the polybasic acid organic ligand can be any value within the range formed by any two of the following values: 0.05, 0.1, 0.15, 0.2, 0.25, and 0.3.

[0020] In some embodiments of the present invention, preferably, the metal salt is 0.2-0.4 parts by weight, and the polybasic acid organic ligand is 0.1-0.2 parts by weight. The weight percentage of the metal salt can be any value within the range formed by any two of the values ​​0.2, 0.3, and 0.4, and the weight percentage of the polybasic acid organic ligand can be any value within the range formed by any two of the values ​​0.1, 0.12, 0.15, 0.18, and 0.2.

[0021] In other embodiments of the present invention, the antioxidant is selected from one or more of tris(4-nonylphenyl)phosphite, β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, and vitamin E. The selected antioxidant is colorless and non-volatile during processing, remains stable, and is easily dispersed in the spinning solution.

[0022] In some embodiments of the present invention, preferably, the first solvent also contains a dispersant, which plays a role in maintaining the stability of the product particles. The dispersant is polyvinylpyrrolidone, and the content is 1-5 parts, specifically any value within the range formed by any two of the values ​​1, 3, and 5.

[0023] The second aspect of the present invention provides a method for preparing ultra-high molecular weight polyethylene fiber, wherein a spinning solution containing a second solvent, ultra-high molecular weight polyethylene powder, an antioxidant, and a filler is spun to obtain the ultra-high molecular weight polyethylene fiber; wherein the filler is obtained by reacting a metal salt and a polybasic acid organic ligand dissolved in a first solvent.

[0024] In some embodiments of the present invention, preferably, the ultra-high molecular weight polyethylene powder accounts for 5-10 wt% of the second solvent.

[0025] In some embodiments of the present invention, preferably, the antioxidant accounts for 0.2-1 wt% of the ultra-high molecular weight polyethylene powder, and the filler accounts for 0.5-3 wt% of the ultra-high molecular weight polyethylene powder.

[0026] The proportion of ultra-high molecular weight polyethylene (UHMWPE) affects the molecular weight of the obtained product. A higher UHMWPE concentration results in greater shear stress and thermal degradation per unit volume of polyethylene, leading to a decrease in fiber molecular weight. The filler content affects the product's adsorption performance; therefore, a suitable ratio needs to be set. The proportion of UHMWPE powder in the second solvent can be any value within the range formed by any two of the following: 5wt%, 6wt%, 7wt%, 8wt%, 9wt%, and 10wt%.

[0027] In some embodiments of the present invention, preferably, the process of forming the spinning solution includes: dispersing the ultra-high molecular weight polyethylene powder, antioxidant, and filler in a second solvent to form the spinning solution. The second solvent can dissolve the corresponding raw materials, specifically decahydronaphthalene.

[0028] In some embodiments of the present invention, preferably, the dispersion process includes: ultrasonic-assisted stirring at 50-100°C for 1-4 hours.

[0029] In some other embodiments of the present invention, preferably, the dispersion process includes: ultrasonic-assisted stirring at 70-90°C for 2-3 hours.

[0030] The dispersion time and temperature affect the strength and modulus of the prepared product. The dispersion time can be any value within the range formed by any two values ​​from 1h, 2h, 3h, 4h, or any value within the range formed by any two values ​​from 2h, 2.2h, 2.5h, 2.8h, 3h. The dispersion temperature can be any value within the range formed by any two values ​​from 50℃, 60℃, 70℃, 80℃, 90℃, 100℃, or any value within the range formed by any two values ​​from 70℃, 75℃, 80℃, 85℃, 90℃.

[0031] Ultrasonic assistance is used during dispersion, which helps to disperse the mixture more evenly and faster. The ultrasonic power is 300-1000w, preferably 500-800w. The ultrasonic power can be any value within the range formed by any two of the following values: 300w, 500w, 600w, 700w, 800w, and 1000w.

[0032] In some embodiments of the present invention, preferably, the spinning process includes: drawing, wherein the drawing ratio is 25-50 times.

[0033] In other embodiments of the invention, preferably, the stretching ratio is 30-40 times.

[0034] The stretching ratio has a significant impact on the modulus and strength of the product. The stretching ratio can be any value within the range of any two values ​​formed by 25, 30, 35, 40, 45, and 50, or any value within the range of any two values ​​formed by 30, 32, 35, 38, and 40. The stretching temperature can be any value within the range of any two values ​​formed by 130℃, 135℃, 140℃, 145℃, 150℃, and 155℃, or any value within the range of any two values ​​formed by 135℃, 138℃, 140℃, 142℃, and 145℃.

[0035] In some embodiments of the present invention, the spinning process further includes adding the spinning solution to a twin-screw extruder before drawing, extruding it through a spinneret to form nascent filaments, and then drawing the nascent filaments.

[0036] In some embodiments of the present invention, preferably, the working pressure of the twin-screw extruder is 2.0-5.0 MPa, and its working process includes feeding, homogenization and conveying, wherein the temperature of the feeding section is 70-150°C, the temperature of the homogenization section is 120-170°C, and the temperature of the conveying section is 130-180°C.

[0037] In some other embodiments of the present invention, preferably, the twin-screw extruder has an operating pressure of 3-4 MPa, a feeding section temperature of 90-140°C, a homogenization section temperature of 150-160°C, and a conveying section temperature of 150-170°C.

[0038] In some embodiments of the present invention, preferably, the spinneret temperature is 150-180°C and the spinneret pressure is 2-5 MPa.

[0039] In some other embodiments of the present invention, preferably, the spinneret temperature is 160°C-170°C and the spinneret pressure is 3-4 MPa.

[0040] The working pressure of the twin-screw extruder can be any value within the range of any two values ​​formed by 2MPa, 3MPa, 4MPa, and 5MPa, or any value within the range of any two values ​​formed by 3.0MPa, 3.2MPa, 3.5MPa, 3.8MPa, and 4.0MPa; the feeding section temperature can be any value within the range of any two values ​​formed by 70℃, 80℃, 90℃, 100℃, 110℃, 120℃, 130℃, 140℃, and 150℃; the homogenization section temperature can be any value within the range of any two values ​​formed by 120℃, 130℃, 140℃, 150℃, and 160℃, or any value within the range of any two values ​​formed by 150℃, 152℃, 155℃, 158℃, and 160℃; the conveying section temperature can be 130℃, 140℃, 150℃, and 160℃. The temperature can be any value within the range of any two values ​​formed by 150℃, 155℃, 160℃, 165℃, 170℃, and 180℃; the spinneret temperature can be any value within the range of any two values ​​formed by 150℃, 160℃, 170℃, and 180℃; the spinneret pressure can be any value within the range of any two values ​​formed by 160℃, 162℃, 165℃, 168℃, and 170℃; the spinneret pressure can be any value within the range of any two values ​​formed by 2.0MPa, 3.0MPa, 4.0MPa, and 5.0MPa; the spinneret pressure can be any value within the range of any two values ​​formed by 3.0MPa, 3.2MPa, 3.5MPa, 3.8MPa, and 4.0MPa.

[0041] The third aspect of this invention provides an application of ultra-high molecular weight polyethylene fiber in wastewater treatment.

[0042] The ultra-high molecular weight polyethylene fiber obtained by this invention has strong adsorption capacity and good mechanical strength. Furthermore, due to the acid and alkali resistance and solvent corrosion resistance of polyethylene material, the prepared fiber has good chemical stability and is particularly suitable for wastewater treatment.

[0043] The present invention will be described in detail below through embodiments. The amounts of materials used in the following embodiments are parts by weight. The sources of raw materials for each embodiment are explained below:

[0044] Polyvinylpyrrolidone (PVP) is from Sinopharm Chemical Reagent Co., Ltd.

[0045] The ethanol was sourced from Sinopharm Chemical Reagent Co., Ltd.

[0046] DMF is from Sinopharm Chemical Reagent Co., Ltd.;

[0047] Terephthalic acid is from Sinopharm Chemical Reagent Co., Ltd.

[0048] 1,4-Naphthoic acid is from Sinopharm Chemical Reagent Co., Ltd.

[0049] 1,4-Cyclohexanedicarboxylic acid is from Sinopharm Chemical Reagent Co., Ltd.

[0050] Zinc nitrate is from Aladdin Reagent Co., Ltd.

[0051] Copper acetate is from Aladdin Reagent Co., Ltd.

[0052] Cobalt chloride is from Aladdin Reagent Co., Ltd.;

[0053] Nickel nitrate is from Aladdin Reagent Co., Ltd.;

[0054] The ultra-high molecular weight polyethylene powder is from Shanghai Lianle Chemical Technology Co., Ltd., with a weight-average molecular weight of 4.5 million g / mol.

[0055] Tris(4-nonylphenyl) phosphite is from Aladdin Reagent Co., Ltd.;

[0056] Vitamin E is from Aladdin Reagent Co., Ltd.

[0057] β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl ester is from Aladdin Reagent Co., Ltd.;

[0058] The decahydronaphthalene comes from Jiangsu Zhongneng Chemical Technology Co., Ltd.

[0059] The strength and modulus of the obtained fibers were determined according to the GB / T 14344-2008 standard;

[0060] The melting temperature was determined according to GB / T 19466.3-2004 standard;

[0061] The adsorption capacity was determined using the following method:

[0062] Weigh out m tons of ultra-high molecular weight polyethylene fiber and add it to a dye solution (methylene blue) with a volume of V and a concentration of c0. Place the solution in a 30°C constant temperature water bath and allow it to adsorb for 10 hours. Separate and collect the supernatant. Calculate the residual dye concentration c1 in the solution by measuring its ultraviolet absorbance and substituting it into the standard curve equation. The adsorption amount Q is calculated using the following formula:

[0063]

[0064] Preparation Example 1

[0065] Preparation of fillers

[0066] 2.5 parts of polyvinylpyrrolidone (PVP, with a weight-average molecular weight of about 10,000 g / mol) were dissolved in a mixture of 50 mL of ethanol and 50 mL of DMF. The mixture was heated and stirred at 120 °C for 15 minutes. Then, 0.3 parts of zinc nitrate and 0.25 parts of terephthalic acid were added, and the reaction was continued at 120 °C for 1 hour. After centrifugation and washing, the filler was obtained.

[0067] Preparation Examples 2-5

[0068] The method of Preparation Example 1 is used, except that the proportions of reactants and dispersants are different, as detailed in Material Table 1.

[0069] Table 1 Material composition for preparing the packing

[0070]

[0071] Example 1

[0072] Step 1: Add 100 parts of ultra-high molecular weight polyethylene powder, 1 part of the filler from Preparation Example 1, 0.35 parts of tris(4-nonylphenyl) phosphite, and 0.35 parts of vitamin E to 1500 parts of decahydronaphthalene. Disperse the mixture at 80°C with ultrasonic-assisted stirring at 600W for 2 hours to form a spinning solution.

[0073] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 120℃, the temperature of the homogenization section is 155℃, the temperature of the conveying section is 160℃, the pressure of the twin-screw extruder is 3.2MPa, the temperature of the spinneret is 165℃, and the pressure of the spinneret is 3.2MPa.

[0074] Step 3: The nascent filaments are drawn at a ratio of 35 times and a drawing temperature of 140℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0075] The prepared fiber has a strength of 35 cN / dtex, a modulus of 1562 cN / dtex, an adsorption capacity of 350 mg / g, and a melting temperature of 144℃.

[0076] Example 2

[0077] Step 1: Add 100 parts of ultra-high molecular weight polyethylene powder, 2 parts of filler from Preparation Example 1, 0.35 parts of tris(4-nonylphenyl) phosphite, and 0.35 parts of vitamin E to 1500 parts of decahydronaphthalene. Disperse the mixture at 80°C with ultrasonic-assisted stirring at 600W for 2 hours to form a spinning solution.

[0078] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 120℃, the temperature of the homogenization section is 155℃, the temperature of the conveying section is 160℃, the pressure of the twin-screw extruder is 3.2MPa, the temperature of the spinneret is 165℃, and the pressure of the spinneret is 3.2MPa.

[0079] Step 3: The nascent filaments are drawn at a ratio of 35 times and a drawing temperature of 140℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0080] The prepared fiber has a strength of 33 cN / dtex, a modulus of 1587 cN / dtex, an adsorption capacity of 560 mg / g, and a melting temperature of 145℃.

[0081] Example 3

[0082] Step 1: Add 100 parts of ultra-high molecular weight polyethylene powder, 1 part of the filler from Preparation Example 1, 0.35 parts of tris(4-nonylphenyl) phosphite, and 0.35 parts of vitamin E to 1500 parts of decahydronaphthalene. Disperse the mixture at 80°C with ultrasonic-assisted stirring at 600W for 2 hours to form a spinning solution.

[0083] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 120℃, the temperature of the homogenization section is 155℃, the temperature of the conveying section is 160℃, the pressure of the twin-screw extruder is 3.2MPa, the temperature of the spinneret is 170℃, and the pressure of the spinneret is 3.2MPa.

[0084] Step 3: The nascent filaments are drawn at a ratio of 35 times and a drawing temperature of 140℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0085] The prepared fiber has a strength of 36 cN / dtex, a modulus of 1594 cN / dtex, an adsorption capacity of 350 mg / g, and a melting temperature of 144℃.

[0086] Example 4

[0087] Step 1: Add 100 parts of ultra-high molecular weight polyethylene powder, 1 part of the filler from Preparation Example 1, 0.35 parts of tris(4-nonylphenyl) phosphite, and 0.35 parts of vitamin E to 1500 parts of decahydronaphthalene. Disperse the mixture at 80°C with ultrasonic-assisted stirring at 600W for 2 hours to form a spinning solution.

[0088] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 120℃, the temperature of the homogenization section is 155℃, the temperature of the conveying section is 160℃, the pressure of the twin-screw extruder is 3.2MPa, the temperature of the spinneret is 165℃, and the pressure of the spinneret is 3.2MPa.

[0089] Step 3: The nascent filaments are drawn at a ratio of 30 times and a drawing temperature of 140℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0090] The prepared fiber has a strength of 28 cN / dtex, a modulus of 1348 cN / dtex, an adsorption capacity of 332 mg / g, and a melting temperature of 141℃.

[0091] Example 5

[0092] Step 1: Add 100 parts of ultra-high molecular weight polyethylene powder, 1 part of the filler from Preparation Example 2, 0.35 parts of tris(4-nonylphenyl) phosphite, and 0.35 parts of vitamin E to 1500 parts of decahydronaphthalene. Disperse the mixture at 80°C with ultrasonic-assisted stirring at 600W for 2 hours to form a spinning solution.

[0093] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 120℃, the temperature of the homogenization section is 155℃, the temperature of the conveying section is 160℃, the pressure of the twin-screw extruder is 3.2MPa, the temperature of the spinneret is 165℃, and the pressure of the spinneret is 3.2MPa.

[0094] Step 3: The nascent filaments are drawn at a ratio of 35 times and a drawing temperature of 140℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0095] The prepared fiber has a strength of 35 cN / dtex, a modulus of 1560 cN / dtex, an adsorption capacity of 400 mg / g, and a melting temperature of 145℃.

[0096] Example 6

[0097] Step 1: Add 100 parts of ultra-high molecular weight polyethylene powder, 1 part of the filler from Preparation Example 3, 0.35 parts of tris(4-nonylphenyl) phosphite, and 0.35 parts of vitamin E to 1500 parts of decahydronaphthalene. Disperse the mixture at 80°C with ultrasonic-assisted stirring at 600W for 2 hours to form a spinning solution.

[0098] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 120℃, the temperature of the homogenization section is 155℃, the temperature of the conveying section is 160℃, the pressure of the twin-screw extruder is 3.2MPa, the temperature of the spinneret is 165℃, and the pressure of the spinneret is 3.2MPa.

[0099] Step 3: The nascent filaments are drawn at a ratio of 35 times and a drawing temperature of 140℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0100] The prepared fiber has a strength of 35 cN / dtex, a modulus of 1550 cN / dtex, an adsorption capacity of 450 mg / g, and a melting temperature of 145℃.

[0101] Example 7

[0102] Step 1: Add 100 parts of ultra-high molecular weight polyethylene powder, 1 part of the filler from Preparation Example 4, 0.35 parts of tris(4-nonylphenyl) phosphite, and 0.35 parts of vitamin E to 1500 parts of decahydronaphthalene. Disperse the mixture at 80°C with ultrasonic-assisted stirring at 600W for 2 hours to form a spinning solution.

[0103] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 120℃, the temperature of the homogenization section is 155℃, the temperature of the conveying section is 160℃, the pressure of the twin-screw extruder is 3.2MPa, the temperature of the spinneret is 165℃, and the pressure of the spinneret is 3.2MPa.

[0104] Step 3: The nascent filaments are drawn at a ratio of 35 times and a drawing temperature of 140℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0105] The prepared fiber has a strength of 35 cN / dtex, a modulus of 1550 cN / dtex, an adsorption capacity of 200 mg / g, and a melting temperature of 142℃.

[0106] Example 8

[0107] Step 1: Add 100 parts of ultra-high molecular weight polyethylene powder, 1 part of filler from Preparation Example 5, 0.35 parts of tris(4-nonylphenyl) phosphite, and 0.35 parts of vitamin E to 1500 parts of decahydronaphthalene. Disperse the mixture at 80°C with ultrasonic-assisted stirring at 600W for 2 hours to form a spinning solution.

[0108] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 120℃, the temperature of the homogenization section is 155℃, the temperature of the conveying section is 160℃, the pressure of the twin-screw extruder is 3.2MPa, the temperature of the spinneret is 165℃, and the pressure of the spinneret is 3.2MPa.

[0109] Step 3: The nascent filaments are drawn at a ratio of 35 times and a drawing temperature of 140℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0110] The prepared fiber has a strength of 35 cN / dtex, a modulus of 1550 cN / dtex, an adsorption capacity of 300 mg / g, and a melting temperature of 142℃.

[0111] Example 9

[0112] Step 1: Add 150 parts of ultra-high molecular weight polyethylene powder, 1.5 parts of filler from Preparation Example 2, 0.5 parts of tris(4-nonylphenyl) phosphite, and 0.5 parts of vitamin E to 1500 parts of decahydronaphthalene. Disperse the mixture at 80°C with ultrasonic-assisted stirring at 600W for 2 hours to form a spinning solution.

[0113] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 120℃, the temperature of the homogenization section is 155℃, the temperature of the conveying section is 160℃, the pressure of the twin-screw extruder is 3.2MPa, the temperature of the spinneret is 165℃, and the pressure of the spinneret is 3.2MPa.

[0114] Step 3: The nascent filaments are drawn at a ratio of 35 times and a drawing temperature of 140℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0115] The prepared fiber has a strength of 31 cN / dtex, a modulus of 1430 cN / dtex, an adsorption capacity of 450 mg / g, and a melting temperature of 142℃.

[0116] Example 10

[0117] Step 1: Add 120 parts of ultra-high molecular weight polyethylene powder, 1.2 parts of filler from Preparation Example 2, 0.5 parts of tris(4-nonylphenyl) phosphite, and 0.4 parts of vitamin E to 1500 parts of decahydronaphthalene. Disperse the mixture at 80°C with ultrasonic-assisted stirring at 600W for 2 hours to form a spinning solution.

[0118] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 120℃, the temperature of the homogenization section is 155℃, the temperature of the conveying section is 160℃, the pressure of the twin-screw extruder is 3.2MPa, the temperature of the spinneret is 165℃, and the pressure of the spinneret is 3.2MPa.

[0119] Step 3: The nascent filaments are drawn at a ratio of 35 times and a drawing temperature of 140℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0120] The prepared fiber has a strength of 32 cN / dtex, a modulus of 1400 cN / dtex, an adsorption capacity of 430 mg / g, and a melting temperature of 143℃.

[0121] Example 11

[0122] Step 1: Add 100 parts of ultra-high molecular weight polyethylene powder, 0.5 parts of filler from Preparation Example 2, 0.35 parts of tris(4-nonylphenyl) phosphite, and 0.35 parts of vitamin E to 1500 parts of decahydronaphthalene. Disperse the mixture at 80°C with ultrasonic-assisted stirring at 600W for 2 hours to form a spinning solution.

[0123] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 120℃, the temperature of the homogenization section is 155℃, the temperature of the conveying section is 160℃, the pressure of the twin-screw extruder is 3.2MPa, the temperature of the spinneret is 165℃, and the pressure of the spinneret is 3.2MPa.

[0124] Step 3: The nascent filaments are drawn at a ratio of 35 times and a drawing temperature of 140℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0125] The prepared fiber has a strength of 35 cN / dtex, a modulus of 1560 cN / dtex, an adsorption capacity of 200 mg / g, and a melting temperature of 144℃.

[0126] Example 12

[0127] Step 1: Add 100 parts of ultra-high molecular weight polyethylene powder, 3 parts of filler from Preparation Example 2, 0.35 parts of tris(4-nonylphenyl) phosphite, and 0.35 parts of vitamin E to 1500 parts of decahydronaphthalene. Disperse the mixture at 80°C with ultrasonic-assisted stirring at 600W for 2 hours to form a spinning solution.

[0128] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 120℃, the temperature of the homogenization section is 155℃, the temperature of the conveying section is 160℃, the pressure of the twin-screw extruder is 3.2MPa, the temperature of the spinneret is 165℃, and the pressure of the spinneret is 3.2MPa.

[0129] Step 3: The nascent filaments are drawn at a ratio of 35 times and a drawing temperature of 140℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0130] The prepared fiber has a strength of 35 cN / dtex, a modulus of 1570 cN / dtex, an adsorption capacity of 600 mg / g, and a melting temperature of 145℃.

[0131] Example 13

[0132] Step 1: Add 100 parts of ultra-high molecular weight polyethylene powder, 1 part of the filler from Preparation Example 2, 0.1 parts of tris(4-nonylphenyl) phosphite, and 0.1 parts of β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl ester to 1500 parts of decahydronaphthalene. Disperse the mixture at 80°C with ultrasonic-assisted stirring at 600W for 2 hours to form a spinning solution.

[0133] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 120℃, the temperature of the homogenization section is 155℃, the temperature of the conveying section is 160℃, the pressure of the twin-screw extruder is 3.2MPa, the temperature of the spinneret is 165℃, and the pressure of the spinneret is 3.2MPa.

[0134] Step 3: The nascent filaments are drawn at a ratio of 35 times and a drawing temperature of 140℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0135] The prepared fiber has a strength of 25 cN / dtex, a modulus of 1300 cN / dtex, an adsorption capacity of 400 mg / g, and a melting temperature of 140℃.

[0136] Example 14

[0137] Step 1: Add 100 parts of ultra-high molecular weight polyethylene powder, 1 part of the filler from Preparation Example 2, 0.5 parts of tris(4-nonylphenyl) phosphite, and 0.5 parts of β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl ester to 1500 parts of decahydronaphthalene. Disperse the mixture at 80°C with ultrasonic-assisted stirring at 600W for 2 hours to form a spinning solution.

[0138] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 120℃, the temperature of the homogenization section is 155℃, the temperature of the conveying section is 160℃, the pressure of the twin-screw extruder is 3.2MPa, the temperature of the spinneret is 165℃, and the pressure of the spinneret is 3.2MPa.

[0139] Step 3: The nascent filaments are drawn at a ratio of 35 times and a drawing temperature of 140℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0140] The prepared fiber has a strength of 38 cN / dtex, a modulus of 1580 cN / dtex, an adsorption capacity of 400 mg / g, and a melting temperature of 146℃.

[0141] Example 15

[0142] Step 1: Add 100 parts of ultra-high molecular weight polyethylene powder, 1 part of the filler from Preparation Example 2, 0.4 parts of tris(4-nonylphenyl) phosphite, and 0.4 parts of β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl ester to 1500 parts of decahydronaphthalene. Disperse the mixture at 80°C with ultrasonic-assisted stirring at 600W for 2 hours to form a spinning solution.

[0143] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 120℃, the temperature of the homogenization section is 155℃, the temperature of the conveying section is 160℃, the pressure of the twin-screw extruder is 3.2MPa, the temperature of the spinneret is 165℃, and the pressure of the spinneret is 3.2MPa.

[0144] Step 3: The nascent filaments are drawn at a ratio of 35 times and a drawing temperature of 140℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0145] The prepared fiber has a strength of 37 cN / dtex, a modulus of 1540 cN / dtex, an adsorption capacity of 400 mg / g, and a melting temperature of 145℃.

[0146] Example 16

[0147] Step 1: Add 100 parts of ultra-high molecular weight polyethylene powder, 1 part of the filler from Preparation Example 2, 0.35 parts of tris(4-nonylphenyl) phosphite, and 0.35 parts of vitamin E to 1500 parts of decahydronaphthalene. Disperse the mixture at 50°C with ultrasonic-assisted stirring at 300W for 4 hours to form a spinning solution.

[0148] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 120℃, the temperature of the homogenization section is 155℃, the temperature of the conveying section is 160℃, the pressure of the twin-screw extruder is 3.2MPa, the temperature of the spinneret is 165℃, and the pressure of the spinneret is 3.2MPa.

[0149] Step 3: The nascent filaments are drawn at a ratio of 35 times and a drawing temperature of 140℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0150] The prepared fiber has a strength of 34 cN / dtex, a modulus of 1450 cN / dtex, an adsorption capacity of 400 mg / g, and a melting temperature of 142℃.

[0151] Example 17

[0152] Step 1: Add 100 parts of ultra-high molecular weight polyethylene powder, 1 part of the filler from Preparation Example 2, 0.35 parts of tris(4-nonylphenyl) phosphite, and 0.35 parts of vitamin E to 1500 parts of decahydronaphthalene. Disperse the mixture at 100°C with ultrasonic-assisted stirring at 1000W for 1 hour to form a spinning solution.

[0153] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 120℃, the temperature of the homogenization section is 155℃, the temperature of the conveying section is 160℃, the pressure of the twin-screw extruder is 3.2MPa, the temperature of the spinneret is 165℃, and the pressure of the spinneret is 3.2MPa.

[0154] Step 3: The nascent filaments are drawn at a ratio of 35 times and a drawing temperature of 140℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0155] The prepared fiber has a strength of 33 cN / dtex, a modulus of 1500 cN / dtex, an adsorption capacity of 400 mg / g, and a melting temperature of 143℃.

[0156] Example 18

[0157] Step 1: Add 100 parts of ultra-high molecular weight polyethylene powder, 1 part of the filler from Preparation Example 3, 0.35 parts of tris(4-nonylphenyl) phosphite, and 0.35 parts of vitamin E to 1500 parts of decahydronaphthalene. Disperse the mixture at 70°C with ultrasonic-assisted stirring at 500W for 3 hours to form a spinning solution.

[0158] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 120℃, the temperature of the homogenization section is 155℃, the temperature of the conveying section is 160℃, the pressure of the twin-screw extruder is 3.2MPa, the temperature of the spinneret is 165℃, and the pressure of the spinneret is 3.2MPa.

[0159] Step 3: The nascent filaments are drawn at a ratio of 35 times and a drawing temperature of 140℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0160] The prepared fiber has a strength of 36 cN / dtex, a modulus of 1570 cN / dtex, an adsorption capacity of 450 mg / g, and a melting temperature of 145℃.

[0161] Example 19

[0162] Step 1: Add 100 parts of ultra-high molecular weight polyethylene powder, 1 part of the filler from Preparation Example 3, 0.35 parts of tris(4-nonylphenyl) phosphite, and 0.35 parts of vitamin E to 1500 parts of decahydronaphthalene. Disperse the mixture at 90°C with ultrasonic-assisted stirring at 800W for 2 hours to form a spinning solution.

[0163] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 120℃, the temperature of the homogenization section is 155℃, the temperature of the conveying section is 160℃, the pressure of the twin-screw extruder is 3.2MPa, the temperature of the spinneret is 165℃, and the pressure of the spinneret is 3.2MPa.

[0164] Step 3: The nascent filaments are drawn at a ratio of 35 times and a drawing temperature of 140℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0165] The prepared fiber has a strength of 37 cN / dtex, a modulus of 1580 cN / dtex, an adsorption capacity of 450 mg / g, and a melting temperature of 145℃.

[0166] Example 20

[0167] Step 1: Add 100 parts of ultra-high molecular weight polyethylene powder, 1 part of the filler from Preparation Example 3, 0.35 parts of tris(4-nonylphenyl) phosphite, and 0.35 parts of vitamin E to 1500 parts of decahydronaphthalene. Disperse the mixture at 80°C with ultrasonic-assisted stirring at 700W for 2 hours to form a spinning solution.

[0168] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 70℃, the temperature of the homogenization section is 120℃, the temperature of the conveying section is 130℃, the pressure of the twin-screw extruder is 2.0MPa, the temperature of the spinneret is 150℃, and the pressure of the spinneret is 2.0MPa.

[0169] Step 3: The nascent filaments are drawn at a ratio of 35 times and a drawing temperature of 140℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0170] The prepared fiber has a strength of 32 cN / dtex, a modulus of 1450 cN / dtex, an adsorption capacity of 450 mg / g, and a melting temperature of 142℃.

[0171] Example 21

[0172] Step 1: Add 100 parts of ultra-high molecular weight polyethylene powder, 1 part of the filler from Preparation Example 3, 0.35 parts of tris(4-nonylphenyl) phosphite, and 0.35 parts of vitamin E to 1500 parts of decahydronaphthalene. Disperse the mixture at 80°C with ultrasonic-assisted stirring at 700W for 2 hours to form a spinning solution.

[0173] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 90℃, the temperature of the homogenization section is 150℃, the temperature of the conveying section is 150℃, the pressure of the twin-screw extruder is 3.0MPa, the temperature of the spinneret is 160℃, and the pressure of the spinneret is 3.2MPa.

[0174] Step 3: The nascent filaments are drawn at a ratio of 35 times and a drawing temperature of 140℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0175] The prepared fiber has a strength of 36 cN / dtex, a modulus of 1550 cN / dtex, an adsorption capacity of 450 mg / g, and a melting temperature of 146℃.

[0176] Example 22

[0177] Step 1: Add 100 parts of ultra-high molecular weight polyethylene powder, 1 part of the filler from Preparation Example 3, 0.35 parts of tris(4-nonylphenyl) phosphite, and 0.35 parts of vitamin E to 1500 parts of decahydronaphthalene. Disperse the mixture at 80°C with ultrasonic-assisted stirring at 700W for 2 hours to form a spinning solution.

[0178] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 140℃, the temperature of the homogenization section is 160℃, the temperature of the conveying section is 170℃, the pressure of the twin-screw extruder is 4.0MPa, the temperature of the spinneret is 170℃, and the pressure of the spinneret is 4.0MPa.

[0179] Step 3: The nascent filaments are drawn at a ratio of 35 times and a drawing temperature of 140℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0180] The prepared fiber has a strength of 37 cN / dtex, a modulus of 1560 cN / dtex, an adsorption capacity of 450 mg / g, and a melting temperature of 146℃.

[0181] Example 23

[0182] Step 1: Add 100 parts of ultra-high molecular weight polyethylene powder, 1 part of the filler from Preparation Example 3, 0.35 parts of tris(4-nonylphenyl) phosphite, and 0.35 parts of vitamin E to 1500 parts of decahydronaphthalene. Disperse the mixture at 80°C with ultrasonic-assisted stirring at 700W for 2 hours to form a spinning solution.

[0183] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 150℃, the temperature of the homogenization section is 170℃, the temperature of the conveying section is 180℃, the pressure of the twin-screw extruder is 5.0MPa, the temperature of the spinneret is 180℃, and the pressure of the spinneret is 5.0MPa.

[0184] Step 3: The nascent filaments are drawn at a ratio of 35 times and a drawing temperature of 140℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0185] The prepared fiber has a strength of 34 cN / dtex, a modulus of 1500 cN / dtex, an adsorption capacity of 450 mg / g, and a melting temperature of 143℃.

[0186] Example 24

[0187] Step 1: Add 100 parts of ultra-high molecular weight polyethylene powder, 1 part of the filler from Preparation Example 3, 0.35 parts of tris(4-nonylphenyl) phosphite, and 0.35 parts of vitamin E to 1500 parts of decahydronaphthalene. Disperse the mixture at 80°C with ultrasonic-assisted stirring at 700W for 2 hours to form a spinning solution.

[0188] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 120℃, the temperature of the homogenization section is 155℃, the temperature of the conveying section is 160℃, the pressure of the twin-screw extruder is 3.2MPa, the temperature of the spinneret is 165℃, and the pressure of the spinneret is 3.2MPa.

[0189] Step 3: The nascent filaments are drawn at a ratio of 25 times and a drawing temperature of 130℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0190] The prepared fiber has a strength of 28 cN / dtex, a modulus of 1350 cN / dtex, an adsorption capacity of 450 mg / g, and a melting temperature of 141℃.

[0191] Example 25

[0192] Step 1: Add 100 parts of ultra-high molecular weight polyethylene powder, 1 part of the filler from Preparation Example 3, 0.35 parts of tris(4-nonylphenyl) phosphite, and 0.35 parts of vitamin E to 1500 parts of decahydronaphthalene. Disperse the mixture at 80°C with ultrasonic-assisted stirring at 700W for 2 hours to form a spinning solution.

[0193] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 120℃, the temperature of the homogenization section is 155℃, the temperature of the conveying section is 160℃, the pressure of the twin-screw extruder is 3.2MPa, the temperature of the spinneret is 165℃, and the pressure of the spinneret is 3.2MPa.

[0194] Step 3: The nascent filaments are drawn at a ratio of 30 times and a drawing temperature of 135℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0195] The prepared fiber has a strength of 36 cN / dtex, a modulus of 1550 cN / dtex, an adsorption capacity of 450 mg / g, and a melting temperature of 145℃.

[0196] Example 26

[0197] Step 1: Add 100 parts of ultra-high molecular weight polyethylene powder, 1 part of the filler from Preparation Example 3, 0.35 parts of tris(4-nonylphenyl) phosphite, and 0.35 parts of vitamin E to 1500 parts of decahydronaphthalene. Disperse the mixture at 80°C with ultrasonic-assisted stirring at 700W for 2 hours to form a spinning solution.

[0198] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 120℃, the temperature of the homogenization section is 155℃, the temperature of the conveying section is 160℃, the pressure of the twin-screw extruder is 3.2MPa, the temperature of the spinneret is 165℃, and the pressure of the spinneret is 3.2MPa.

[0199] Step 3: The nascent filaments are drawn at a ratio of 40 times and a drawing temperature of 145℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0200] The prepared fiber has a strength of 40 cN / dtex, a modulus of 1600 cN / dtex, an adsorption capacity of 450 mg / g, and a melting temperature of 145℃.

[0201] Example 27

[0202] Step 1: Add 100 parts of ultra-high molecular weight polyethylene powder, 1 part of the filler from Preparation Example 3, 0.35 parts of tris(4-nonylphenyl) phosphite, and 0.35 parts of vitamin E to 1500 parts of decahydronaphthalene. Disperse the mixture at 80°C with ultrasonic-assisted stirring at 700W for 2 hours to form a spinning solution.

[0203] Step 2: The spinning solution is added to the twin-screw extruder, pumped out by a metering pump, and extruded through a spinneret to form nascent filaments. The temperature of the feeding section of the twin-screw extruder is 120℃, the temperature of the homogenization section is 155℃, the temperature of the conveying section is 160℃, the pressure of the twin-screw extruder is 3.2MPa, the temperature of the spinneret is 165℃, and the pressure of the spinneret is 3.2MPa.

[0204] Step 3: The nascent filaments are drawn at a ratio of 50 times and a temperature of 155℃ to obtain ultra-high molecular weight polyethylene fibers with adsorption properties.

[0205] The prepared fiber has a strength of 32 cN / dtex, a modulus of 1400 cN / dtex, an adsorption capacity of 450 mg / g, and a melting temperature of 142℃.

[0206] Example 28

[0207] The method of Example 1 is implemented, except that the spinneret temperature is 145°C in step 2 and the draw ratio is 20 times in step 3.

[0208] The prepared fiber has a strength of 22 cN / dtex, a modulus of 984 cN / dtex, an adsorption capacity of 325 mg / g, and a melting temperature of 138℃.

[0209] Comparative Example 1

[0210] The method of Example 1 is implemented, except that no filler is added.

[0211] The prepared fiber has a strength of 35 cN / dtex, a modulus of 1487 cN / dtex, an adsorption capacity of 5 mg / g, and a melting temperature of 142℃.

[0212] Comparative Example 2

[0213] The method of Example 1 was implemented, except that no antioxidant was added.

[0214] The prepared fiber has a strength of 21 cN / dtex, a modulus of 1087 cN / dtex, an adsorption capacity of 324 mg / g, and a melting temperature of 137℃.

[0215] Analysis of Examples 1, 2, 5, 6, 11, and 12 shows that the selection of metal salts and polybasic acids in the filler has a significant impact on the adsorption capacity of the filler and the prepared fibers. The adsorption capacity of the fillers prepared in Examples 2 and 3 is significantly better than that of the other examples. The more filler added, the stronger the adsorption capacity of the fibers obtained. Therefore, the fibers prepared in Examples 5, 6, and 12 have a larger adsorption capacity.

[0216] The comparison between Comparative Example 1 and Example 1 shows that the filler contributes the most to the adsorption capacity of the prepared fiber; the comparison between Comparative Example 2 and Example 2 shows that the antioxidant can improve the strength, modulus and melting temperature of the prepared fiber; the comparative analysis between Example 28 and Example 1 shows that a suitable draw ratio helps to improve the strength, modulus and melting temperature of the fiber.

[0217] In summary, the fibers prepared using the method provided by this invention have strong adsorption capacity and good mechanical strength, making them particularly suitable for wastewater treatment.

[0218] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A type of ultra-high molecular weight polyethylene fiber, characterized in that, The ultra-high molecular weight polyethylene (UHMWPE) fiber is used in wastewater treatment. The raw materials for producing the UHMWPE fiber include: UHMWPE powder, antioxidant, and filler; wherein the antioxidant accounts for 0.2-1 wt% of the UHMWPE powder, and the filler accounts for 0.5-3 wt% of the UHMWPE powder; wherein the filler is obtained by reacting a metal salt and a polybasic acid organic ligand dissolved in a first solvent. The method for preparing the ultra-high molecular weight polyethylene fiber includes: spinning a spinning solution containing a second solvent, ultra-high molecular weight polyethylene powder, antioxidant, and filler to obtain the ultra-high molecular weight polyethylene fiber; The process of forming the spinning solution includes: dispersing the ultra-high molecular weight polyethylene powder, antioxidant, and filler in the second solvent to form the spinning solution.

2. The ultra-high molecular weight polyethylene fiber according to claim 1, characterized in that, The antioxidant accounts for 0.6-0.8 wt% of the ultra-high molecular weight polyethylene powder, and the filler accounts for 2-3 wt% of the ultra-high molecular weight polyethylene.

3. The ultra-high molecular weight polyethylene fiber according to claim 1 or 2, characterized in that, The ultra-high molecular weight polyethylene fiber has an adsorption capacity of 200-600 mg / g, a strength of 25-40 cN / dtex, a modulus of 1300-1600 cN / dtex, and a melting temperature of 140-150℃.

4. The ultra-high molecular weight polyethylene fiber according to claim 3, characterized in that, The metal salt is selected from at least one of zinc salt, copper salt, cobalt salt, and nickel salt.

5. The ultra-high molecular weight polyethylene fiber according to claim 4, characterized in that, The zinc salt is selected from at least one of zinc nitrate, zinc acetate, and zinc chloride; the copper salt is selected from at least one of copper nitrate, copper acetate, and copper chloride; the cobalt salt is selected from at least one of cobalt nitrate, cobalt acetate, and cobalt chloride; and the nickel salt is selected from at least one of nickel nitrate, nickel acetate, and nickel chloride.

6. The ultra-high molecular weight polyethylene fiber according to claim 5, characterized in that, The polybasic acid organic ligand is selected from at least one of terephthalic acid, 1,4-naphthalenedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, 2,2'-biphenyl dicarboxylic acid, 2,5-dihydroxyterephthalic acid, and 3,3',5,5'-biphenyltetracarboxylic acid.

7. The ultra-high molecular weight polyethylene fiber according to any one of claims 4-6, characterized in that, The metal salt is 0.1-0.5 parts by weight, and the polybasic acid organic ligand is 0.05-0.3 parts by weight.

8. The ultra-high molecular weight polyethylene fiber according to claim 7, characterized in that, The metal salt is 0.2-0.4 parts by weight, and the polybasic acid organic ligand is 0.1-0.2 parts by weight.

9. A method for preparing ultra-high molecular weight polyethylene fiber according to any one of claims 1-8, characterized in that, The spinning solution containing a second solvent, ultra-high molecular weight polyethylene powder, antioxidant, and filler is spun to obtain the ultra-high molecular weight polyethylene fiber; wherein, the filler is obtained by reacting a metal salt and a polybasic acid organic ligand dissolved in a first solvent, and the spinning solution is formed by dispersing the ultra-high molecular weight polyethylene powder, antioxidant, and filler in the second solvent to form the spinning solution.

10. The preparation method according to claim 9, characterized in that, The ultra-high molecular weight polyethylene powder accounts for 5-10 wt% of the second solvent.

11. The preparation method according to claim 10, characterized in that, The antioxidant accounts for 0.2-1 wt% of the ultra-high molecular weight polyethylene powder, and the filler accounts for 0.5-3 wt% of the ultra-high molecular weight polyethylene powder.

12. The preparation method according to any one of claims 9-11, characterized in that, The dispersion process includes ultrasonic-assisted stirring at 50-100℃ for 1-4 hours.

13. The preparation method according to claim 12, characterized in that, The dispersion process includes ultrasonic-assisted stirring at 70-90℃ for 2-3 hours.

14. The preparation method according to any one of claims 9-11, characterized in that, The spinning process includes: drawing, wherein the drawing ratio is 25-50 times.

15. The preparation method according to claim 14, characterized in that, The stretching ratio is 30-40 times.

16. The application of ultra-high molecular weight polyethylene fiber according to any one of claims 1-8 or ultra-high molecular weight polyethylene fiber obtained by the preparation method according to any one of claims 9-15 in wastewater treatment.

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