A wear-resistant cleaning cloth and preparation method thereof

Abstract

The present invention belongs to the technical field of cleaning cloths, and specifically relates to a wear-resistant cleaning cloth and a preparation method thereof. Polyvinyl pyrrolidone is first grafted onto the surface of a polyester slice by chemical grafting to obtain a hydrophilic modified polyester slice; then polyethylene glycol and fluorine elements are introduced onto the surface of graphene to obtain fluorinated graphene; then the hydrophilic modified polyester slice and the fluorinated graphene are mixed and uniformly blended, and then melt-blended and extruded and granulated, and then melt-spinning is used to spin to obtain modified polyester fibers, and finally the modified polyester fibers are blended with nylon fibers to obtain a wear-resistant cleaning cloth. The present invention achieves significant improvements in wear resistance, water absorption and moisture absorption, stain resistance, antistatic properties, and water washability of the cleaning cloth obtained by chemical modification and composite material design.

Description

Technical Field

[0001] The invention belongs to the technical field of cleaning cloths, and in particular relates to a wear-resistant cleaning cloth and a preparation method thereof. Background Art

[0002] In daily life and industrial production, cleaning cloths are a common cleaning tool and are widely used in household cleaning, industrial wiping, medical disinfection and other fields. With the advancement of science and technology and the improvement of people's requirements for cleaning effects, traditional cleaning cloths have been difficult to meet diverse needs, especially in terms of wear resistance, water absorption, stain resistance and anti-static performance. Traditional cleaning cloths have obvious shortcomings. For example, although cleaning cloths made of ordinary polyester fibers have certain wear resistance, their water absorption is poor and they are prone to static electricity, resulting in a decrease in the ability to absorb dust and dirt during the cleaning process. In addition, traditional cleaning cloths are prone to performance degradation after repeated washing and have a short service life. Therefore, the development of a wear-resistant cleaning cloth with excellent comprehensive performance has become a hot topic in current research.

[0003] As a synthetic fiber, polyester fiber is widely used in the textile industry due to its high strength, good chemical corrosion resistance and low cost. However, polyester fiber has low surface energy and poor hydrophilicity, which leads to poor water absorption and moisture absorption performance, limiting its application in the field of cleaning cloth. In order to improve the performance of polyester fiber, researchers usually use surface modification methods to introduce hydrophilic groups on the fiber surface by chemical grafting or physical adsorption. As a new type of two-dimensional nanomaterial, graphene has attracted widespread attention in the field of materials science due to its unique structure and excellent performance. Graphene has extremely high specific surface area, excellent mechanical properties, good electrical conductivity and thermal conductivity, and is considered to be an ideal filler for enhancing the performance of composite materials. However, the surface inertness of graphene is strong, and it is difficult to form a good interface with the polymer matrix, which limits its application in composite materials. In order to overcome this problem, researchers usually perform surface functionalization modification on graphene, and improve its compatibility with the matrix material by introducing active groups or polymer segments. In recent years, with the development of nanotechnology and functional materials, the preparation technology of cleaning cloth has been continuously innovated. For example, by introducing nanomaterials (such as graphene, carbon nanotubes, etc.) into fibers, the mechanical properties and functional characteristics of cleaning cloths can be significantly improved. In addition, the use of melt spinning and extrusion granulation technology can achieve large-scale production of fibers, reduce production costs, and improve production efficiency. The application of these technologies not only promotes the improvement of cleaning cloth performance, but also provides technical support for the industrial production of cleaning cloths. Summary of the invention

[0004] In view of the deficiencies of the prior art, the object of the present invention is to provide a wear-resistant cleaning cloth and a preparation method thereof, firstly, by means of chemical grafting, polyvinyl pyrrolidone is introduced on the surface of a polyester slice, polyethylene glycol and fluorine elements are introduced on the surface of graphene, then the hydrophilic modified polyester slice is mixed with the fluorinated graphene, melt blended, extruded and granulated, and then melt-spun to form a modified polyester fiber, which is finally blended with nylon fiber to obtain a wear-resistant cleaning cloth. The cleaning cloth provided by the present invention has excellent wear resistance, water absorption, anti-fouling, antistatic and water-washing resistance.

[0005] The technical solution adopted by the present invention to achieve the above-mentioned purpose is:

[0006] A method for preparing a wear-resistant cleaning cloth comprises the following steps:

[0007] Step S1: dispersing the polyester chips in a tert-butyl hydroperoxide solution, heating to 35-55° C., stirring and reacting for 1-3 hours, cooling to room temperature, separating the solid from the liquid, and re-dispersing the obtained solid in a polyvinyl pyrrolidone solution, heating to 75-95° C., stirring and reacting for 1-2 hours, cooling to room temperature, filtering, washing, and drying to obtain a hydrophilic modified polyester chip;

[0008] Step S2: under stirring conditions, dispersing polyethylene glycol in N,N-dimethylformamide, heating to 95-115° C., reacting for 1-2 hours, then cooling to 85-105° C., adding 4,4,4-trifluorobutyric acid, continuing the reaction for 7-11 hours, cooling to room temperature, performing solid-liquid separation, washing, and drying to obtain fluorinated polyethylene glycol;

[0009] Step S3: uniformly mixing fluorinated polyethylene glycol, silane coupling agent, anhydrous ethanol and deionized water, raising the temperature to 40-60° C. under stirring conditions, reacting for 0.5-1.5 hours, then adding graphene, stirring and reacting at 50-70° C. for 5-7 hours after ultrasonic dispersion, centrifugally separating, washing, drying, grinding and sieving to obtain fluorinated graphene;

[0010] Step S4: After the hydrophilic modified polyester slices and the fluorinated graphene are mixed and blended, they are melt-blended and extruded into granules, and then melt-spinned to obtain modified polyester fibers, and then the modified polyester fibers are blended with nylon fibers to obtain wear-resistant cleaning cloths.

[0011] The present invention grafts polyvinyl pyrrolidone onto the surface of polyester chips by chemical grafting, so that the hydrophilicity and hygroscopicity of the polyester chips are significantly improved. The polyvinyl pyrrolidone molecular chain contains a large number of polar groups (such as amide groups), which can form hydrogen bonds with water molecules, thereby enhancing the water absorption and hygroscopicity of the polyester chips. In addition, the introduction of polyvinyl pyrrolidone also improves the surface energy of the polyester chips, making it easier to interface with other materials (such as fluorinated graphene), thereby forming a more uniform composite material in the subsequent melt blending process; the preparation of fluorinated graphene introduces polyethylene glycol and fluorine elements on the graphene surface, giving graphene unique properties and improving its compatibility with hydrophilic modified polyester chips. The introduction of polyethylene glycol enhances the hydrophilicity of graphene, while the introduction of fluorine elements significantly improves the oleophobicity and stain resistance of graphene. The strong electronegativity of fluorine elements makes the surface of fluorinated graphene have a lower surface energy, thereby reducing the adhesion of oil and other pollutants.

[0012] Furthermore, in step S1, the mass ratio of the polyester chips, the tert-butyl hydroperoxide solution, and the polyvinyl pyrrolidone solution is 1:35-55:15-25, the tert-butyl hydroperoxide solution is prepared by mixing tert-butyl hydroperoxide, anhydrous ethanol, and deionized water, and the mass percentage of tert-butyl hydroperoxide in the tert-butyl hydroperoxide solution is 0.5-1.5%, and the polyvinyl pyrrolidone solution is prepared by mixing polyvinyl pyrrolidone and deionized water, and the mass percentage of polyvinyl pyrrolidone in the polyvinyl pyrrolidone solution is 4-6%.

[0013] Furthermore, in step S2, the mass ratio of polyethylene glycol to 4,4,4-trifluorobutyric acid is 80:1.7-2.5, and the mass volume ratio of polyethylene glycol to N,N-dimethylformamide is 0.05-0.15 g / mL.

[0014] Furthermore, in step S3, the mass ratio of fluorinated polyethylene glycol, silane coupling agent, anhydrous ethanol, deionized water and graphene is 1.5-2.5:1-2:8-11:50:0.1-0.15, the silane coupling agent is silane coupling agent 550 or silane coupling agent 560, the ultrasonic power during ultrasonic dispersion is 220-240 W, and the ultrasonic time is 50-70 min.

[0015] Furthermore, in step S4, the mass ratio of the hydrophilic modified polyester chips to the fluorinated graphene is 60:1-2.

[0016] The wear-resistant cleaning cloth provided by the present invention can also be functionalized by using a treatment liquid containing an antibacterial agent (such as a quaternary ammonium salt antibacterial agent), a softener (such as a silicone softener), and a flame retardant (such as a phosphorus-nitrogen flame retardant) to further improve its comprehensive performance.

[0017] The present invention has the following beneficial effects:

[0018] Nylon fiber itself has high strength and wear resistance, and provides a basic wear-resistant skeleton for cleaning cloth in blending; hydrophilic modified polyester chips are mixed with fluorinated graphene during the spinning process. Fluorinated graphene has low shear and high load-bearing mechanical properties, and can be effectively dispersed in polyester fibers to form a reinforcing phase. The two work synergistically to further improve the wear resistance of modified polyester fibers. After the modified polyester fibers are blended with nylon fibers, the overall wear resistance of the cleaning cloth is improved. The polyvinyl pyrrolidone introduced on the surface of the polyester chips has good hydrophilicity, which greatly improves the water and moisture absorption capacity of the polyester fibers. The polyethylene glycol introduced on the surface of the fluorinated graphene also has a certain hydrophilicity, which can help improve the hygroscopic properties of the fibers. The two work synergistically, making the modified polyester fibers have good water and moisture absorption properties, thereby giving the cleaning cloth excellent water and moisture absorption properties. After the fluorine element is introduced to the surface of fluorinated graphene, the fiber surface has a lower surface energy, and it is difficult for stains to adhere to the fiber surface. At the same time, the hydrophilicity of the modified polyester fiber surface is enhanced, and it is easier to be wetted by water during the cleaning process, making it easier for stains to be carried away by water, reducing the residue of stains on the cleaning cloth. The hydrophilic substance on the surface of the modified polyester fiber can form a conductive layer on the fiber surface, which helps the conduction and release of charges, thereby reducing the generation of static electricity; in addition, fluorinated graphene can also play a charge conduction role in the fiber. It cooperates with the hydrophilic modified polyester chips to form a charge conduction network. When static electricity is generated on the fiber surface, the charge can be quickly conducted and dissipated through this network, so that the antistatic performance of the cleaning cloth is improved. The hydrophilic modified polyester chips are connected to the surface of the polyester chips by chemical grafting. This chemical bonding method is relatively stable and not easy to fall off during the washing process. The fluorinated graphene and the polyester chips are combined together by melt blending to form a relatively stable structure inside the fiber. The fluorinated graphene has good chemical stability and can resist various chemicals and mechanical forces during the washing process, so that the modified polyester fiber can still maintain good performance after washing, thereby improving the washability of the cleaning cloth.

[0019] The cleaning cloth provided by the invention has excellent wear resistance, water and moisture absorption performance, stain resistance, and also has good antistatic performance and water washability. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] Polyester chips are PET polyester chips, brand CB-651S, brand Shanghai Yuanfang; polyethylene glycol, PEG400, density 1.27g / cm³, brand 168 Chemical; graphene, particle size 18μm, brand HG-Cn, brand Harbin Engineering New Materials. The raw materials used in the following examples are all common commercially available products. Example 1

[0022] A method for preparing a wear-resistant cleaning cloth comprises the following steps:

[0023] Step S1: dispersing the polyester chips in a tert-butyl hydroperoxide solution, heating to 45°C, stirring for reaction for 2h, naturally cooling to room temperature, solid-liquid separation, re-dispersing the obtained solid in a polyvinyl pyrrolidone solution, heating to 85°C, continuing stirring for reaction for 1.5h, naturally cooling to room temperature, filtering to remove the filtrate, washing the obtained solid with anhydrous ethanol and deionized water respectively, and then vacuum drying at 60°C to constant weight to obtain a hydrophilic modified polyester chip; wherein the mass ratio of the polyester chips, the tert-butyl hydroperoxide solution, and the polyvinyl pyrrolidone solution is 1:45:20, and the tert-butyl hydroperoxide solution is prepared by mixing tert-butyl hydroperoxide, anhydrous ethanol, and deionized water. The mass percentage of tert-butyl hydroperoxide in the tert-butyl hydroperoxide solution is 1%, and the volumes of anhydrous ethanol and deionized water in the tert-butyl hydroperoxide solution are equal; the polyvinyl pyrrolidone solution is prepared by mixing polyvinyl pyrrolidone and deionized water, and the mass percentage of polyvinyl pyrrolidone in the polyvinyl pyrrolidone solution is 5%; the grafting rate of the hydrophilic modified polyester slice is calculated according to the mass of the polyester slice before and after grafting, and the calculation formula of the grafting rate is: grafting rate (%) = (mass of the grafted modified polyester slice-mass of the unmodified polyester slice) / mass of the unmodified polyester slice × 100%, and the grafting rate of the hydrophilic modified polyester slice in this embodiment is measured according to the above formula to be 2.7%;

[0024] Step S2: under stirring conditions, polyethylene glycol is dispersed in N,N-dimethylformamide, the temperature is raised to 105°C, the reaction is carried out for 1.5 hours, the temperature is then lowered to 95°C, 4,4,4-trifluorobutyric acid is added, the reaction is continued for 9 hours, the mixture is naturally cooled to room temperature, the solid-liquid separation is performed, the solid is taken, the solid is washed three times with acetone, and the solid is vacuum dried at 60°C to constant weight to obtain fluorinated polyethylene glycol. The grafting rate of fluorinated polyethylene glycol is measured by elemental analysis to be 1.4%; wherein, the mass ratio of polyethylene glycol to 4,4,4-trifluorobutyric acid is 80:2.1, and the mass volume ratio of polyethylene glycol to N,N-dimethylformamide is 0.1 g / mL;

[0025] Step S3: Evenly mix fluorinated polyethylene glycol, silane coupling agent, anhydrous ethanol and deionized water, raise the temperature to 50°C under stirring, react for 1 hour, then add graphene, stir and react at 60°C for 6 hours after ultrasonic dispersion, separate the product from the solution by centrifugation, wash with anhydrous ethanol and water three times respectively, finally dry under vacuum at 80°C to constant weight, grind, and pass through a 325 mesh sieve to obtain fluorinated graphene; wherein the mass ratio of fluorinated polyethylene glycol, silane coupling agent, anhydrous ethanol, deionized water and graphene is 2:1.5:9:50:0. 13, the silane coupling agent is silane coupling agent 550, the ultrasonic power during ultrasonic dispersion is 220W, and the ultrasonic time is 60min; the prepared fluorinated graphene is subjected to high-temperature treatment at 600°C for 6h, and the grafting rate of the fluorinated graphene is calculated according to the mass of the fluorinated graphene before and after the high-temperature treatment, and the calculation formula of the grafting rate is: grafting rate (%) = (mass of fluorinated graphene before high-temperature treatment - mass of fluorinated graphene after high-temperature treatment) / mass of fluorinated graphene after high-temperature treatment × 100%. According to the above formula, the grafting rate of the hydrophilic modified polyester chips in this embodiment is 12.3%;

[0026] Step S4: After the hydrophilic modified polyester chips and the fluorinated graphene are mixed and uniformly mixed, the mixture is melt-blended and extruded into granules through a twin-screw extruder, and then spun by a melt spinning method to obtain modified polyester fibers, and then the modified polyester fibers are blended with nylon fibers to obtain wear-resistant cleaning cloth; wherein, the mass ratio of the hydrophilic modified polyester chips to the fluorinated graphene is 60:1.5, the mass ratio of the modified polyester fibers to the nylon fibers is 60:40, the specification of the modified polyester fibers is 2.5D×51mm, the material of the nylon fibers is nylon 6, the specification is 1.5D×38mm, the thickness of the wear-resistant cleaning cloth is 1.5mm, and the surface density is 180g / m 2 The melt blending temperature is 280°C, the blending time is 30 min, the pelletizing speed of the twin-screw extruder is 350 rpm, and the die temperature is 260°C; the melt spinning, blending steps and process conditions can all adopt conventional techniques in the art. Example 2

[0027] A method for preparing a wear-resistant cleaning cloth comprises the following steps:

[0028] Step S1: dispersing the polyester chips in a tert-butyl hydroperoxide solution, heating to 35°C, stirring for reaction for 3 hours, naturally cooling to room temperature, solid-liquid separation, re-dispersing the obtained solid in a polyvinyl pyrrolidone solution, raising the temperature to 75°C, continuing to stir for reaction for 2 hours, naturally cooling to room temperature, filtering to remove the filtrate, washing the obtained solid with anhydrous ethanol and deionized water respectively, and then vacuum drying at 60°C to constant weight to obtain a hydrophilic modified polyester chip; wherein the mass ratio of the polyester chip, the tert-butyl hydroperoxide solution, and the polyvinyl pyrrolidone solution is 1:5 5:25, the tert-butyl hydroperoxide solution is prepared by mixing tert-butyl hydroperoxide, anhydrous ethanol and deionized water, the mass percentage of tert-butyl hydroperoxide in the tert-butyl hydroperoxide solution is 1.5%, and the volumes of anhydrous ethanol and deionized water in the tert-butyl hydroperoxide solution are equal; the polyvinyl pyrrolidone solution is prepared by mixing polyvinyl pyrrolidone and deionized water, and the mass percentage of polyvinyl pyrrolidone in the polyvinyl pyrrolidone solution is 6%; the grafting rate of the hydrophilic modified polyester chips of this embodiment is measured to be 3.0%, and the grafting rate test method is the same as that of Example 1;

[0029] Step S2: under stirring conditions, polyethylene glycol is dispersed in N,N-dimethylformamide, the temperature is raised to 95°C, the reaction is carried out for 2 hours, the temperature is then lowered to 85°C, 4,4,4-trifluorobutyric acid is added, the reaction is continued for 11 hours, the mixture is naturally cooled to room temperature, the solid-liquid separation is performed, the solid is taken, the solid is washed three times with acetone, and the solid is vacuum dried at 60°C to constant weight to obtain fluorinated polyethylene glycol, and the grafting rate of fluorinated polyethylene glycol is measured by elemental analysis to be 1.5%; wherein, the mass ratio of polyethylene glycol to 4,4,4-trifluorobutyric acid is 80:2.5, and the mass volume ratio of polyethylene glycol to N,N-dimethylformamide is 0.15 g / mL;

[0030] Step S3: uniformly mix fluorinated polyethylene glycol, silane coupling agent, anhydrous ethanol and deionized water, raise the temperature to 40°C under stirring, react for 1.5h, then add graphene, stir and react at 50°C for 7h after ultrasonic dispersion, separate the product from the solution by centrifugation, wash three times with anhydrous ethanol and water respectively, finally dry in vacuo at 80°C to constant weight, grind, and sieve through 325 mesh to obtain fluorinated graphene; wherein the mass ratio of the fluorinated polyethylene glycol, silane coupling agent, anhydrous ethanol, deionized water and graphene is 2.5:2:11:50:0.15, the silane coupling agent is silane coupling agent 550, the ultrasonic power is 240W during ultrasonic dispersion, and the ultrasonic time is 50min; the grafting rate of the hydrophilic modified polyester chips in this embodiment is measured to be 12.6%, and the grafting rate test method is the same as that in Example 1;

[0031] Step S4: After the hydrophilic modified polyester chips and the fluorinated graphene are mixed and evenly blended, the mixture is melt-blended and extruded into granules through a twin-screw extruder, and then the modified polyester fibers are spun by a melt spinning method to obtain modified polyester fibers, and then the modified polyester fibers are blended with nylon fibers to obtain wear-resistant cleaning cloth; wherein, the mass ratio of the hydrophilic modified polyester chips to the fluorinated graphene is 60:2, the mass ratio of the modified polyester fibers to the nylon fibers is 60:40, the specification of the modified polyester fibers is 2.5D×51mm, the material of the nylon fibers is nylon 6, the specification is 1.5D×38mm, the thickness of the wear-resistant cleaning cloth is 1.5mm, and the surface density is 180g / m 2 The melt blending temperature is 280°C, the blending time is 30 min, the pelletizing speed of the twin-screw extruder is 350 rpm, and the die temperature is 260°C; the melt spinning, blending steps and process conditions can all adopt conventional techniques in the art. Example 3

[0032] A method for preparing a wear-resistant cleaning cloth comprises the following steps:

[0033] Step S1: dispersing the polyester chips in a tert-butyl hydroperoxide solution, heating to 55° C., stirring for reaction for 1 hour, naturally cooling to room temperature, solid-liquid separation, re-dispersing the obtained solid in a polyvinyl pyrrolidone solution, raising the temperature to 95° C., continuing stirring for reaction for 1 hour, naturally cooling to room temperature, filtering to remove the filtrate, washing the obtained solid with anhydrous ethanol and deionized water respectively, and then vacuum drying at 60° C. to constant weight to obtain a hydrophilic modified polyester chip; wherein the mass ratio of the polyester chip, the tert-butyl hydroperoxide solution, and the polyvinyl pyrrolidone solution is 1:3 5:15, the tert-butyl hydroperoxide solution is prepared by mixing tert-butyl hydroperoxide, anhydrous ethanol and deionized water, the mass percentage of tert-butyl hydroperoxide in the tert-butyl hydroperoxide solution is 0.5%, and the volumes of anhydrous ethanol and deionized water in the tert-butyl hydroperoxide solution are equal; the polyvinyl pyrrolidone solution is prepared by mixing polyvinyl pyrrolidone and deionized water, and the mass percentage of polyvinyl pyrrolidone in the polyvinyl pyrrolidone solution is 4%; the grafting rate of the hydrophilic modified polyester chips of this embodiment is measured to be 2.3%, and the grafting rate test method is the same as that of Example 1;

[0034] Step S2: under stirring conditions, polyethylene glycol is dispersed in N,N-dimethylformamide, the temperature is raised to 115°C, the reaction is carried out for 1 hour, the temperature is then lowered to 105°C, 4,4,4-trifluorobutyric acid is added, the reaction is continued for 7 hours, the mixture is naturally cooled to room temperature, the solid-liquid separation is performed, the solid is taken, the solid is washed three times with acetone, and the solid is vacuum dried at 60°C to constant weight to obtain fluorinated polyethylene glycol. The grafting rate of fluorinated polyethylene glycol is measured by elemental analysis to be 1.2%; wherein, the mass ratio of polyethylene glycol to 4,4,4-trifluorobutyric acid is 80:1.7, and the mass volume ratio of polyethylene glycol to N,N-dimethylformamide is 0.05 g / mL;

[0035] Step S3: uniformly mix fluorinated polyethylene glycol, silane coupling agent, anhydrous ethanol and deionized water, raise the temperature to 60°C under stirring, react for 0.5h, then add graphene, stir and react at 70°C for 5h after ultrasonic dispersion, separate the product from the solution by centrifugation, wash three times with anhydrous ethanol and water respectively, finally dry under vacuum at 80°C to constant weight, grind, and sieve through 325 mesh to obtain fluorinated graphene; wherein the mass ratio of the fluorinated polyethylene glycol, silane coupling agent, anhydrous ethanol, deionized water and graphene is 1.5:1:8:50:0.1, the silane coupling agent is silane coupling agent 560, the ultrasonic power is 220W during ultrasonic dispersion, and the ultrasonic time is 70min; the grafting rate of the hydrophilic modified polyester chips in this embodiment is measured to be 10.9%, and the grafting rate test method is the same as that in Example 1;

[0036] Step S4: After the hydrophilic modified polyester chips and the fluorinated graphene are mixed and evenly blended, the mixture is melt-blended and extruded into granules through a twin-screw extruder, and then the modified polyester fibers are spun by a melt spinning method to obtain modified polyester fibers, and then the modified polyester fibers are blended with nylon fibers to obtain wear-resistant cleaning cloth; wherein, the mass ratio of the hydrophilic modified polyester chips to the fluorinated graphene is 60:1, the mass ratio of the modified polyester fibers to the nylon fibers is 60:40, the specification of the modified polyester fibers is 2.5D×51mm, the material of the nylon fibers is nylon 6, the specification is 1.5D×38mm, the thickness of the wear-resistant cleaning cloth is 1.5mm, and the surface density is 180g / m 2 The melt blending temperature is 280°C, the blending time is 30 min, the pelletizing speed of the twin-screw extruder is 350 rpm, and the die temperature is 260°C; the melt spinning, blending steps and process conditions can all adopt conventional techniques in the art. Comparative Example 1

[0037] A method for preparing a wear-resistant cleaning cloth is prepared according to the method described in Example 1, except that step S1 is omitted, and the hydrophilic modified polyester chips in step S4 are replaced by ordinary polyester chips. Comparative Example 2

[0038] A method for preparing a wear-resistant cleaning cloth is prepared according to the method described in Example 1, except that steps S2 and S3 are omitted, and the fluorinated graphene in step S4 is replaced by graphene. Comparative Example 3

[0039] A method for preparing a wear-resistant cleaning cloth comprises the following steps:

[0040] The dried polyester chips and graphene are mixed and blended, poured into a mixer for melt blending, extruded and granulated by a twin-screw extruder, and then spun by a melt spinning method to obtain modified polyester fibers, which are then blended with nylon fibers to obtain wear-resistant cleaning cloth; wherein the mass ratio of the polyester chips to the graphene is 60:1.5, the mass ratio of the modified polyester fiber to the nylon fiber is 60:40, the specification of the modified polyester fiber is 2.5D×51mm, the material of the nylon fiber is nylon 6, the specification is 1.5D×38mm, the thickness of the wear-resistant cleaning cloth is 1.5mm, and the surface density is 180g / m 2 The melt blending temperature is 280°C, the blending time is 30min, the feeding speed of the twin-screw extruder is 160rpm, the pelletizing speed is 350rpm, and the head temperature is 260°C; the melt spinning, blending steps and process conditions can all adopt conventional techniques in the art.

[0041] The wear-resistant cleaning cloths prepared in Examples 1-3 and Comparative Examples 1-3 were subjected to relevant performance tests. For the moisture absorption performance test, 15 μL of water was dropped onto the surface of the fabric at a distance of 2 cm, and the time required for the water droplet to spread was recorded; the wear resistance performance test was conducted using a TABER wear tester with a load of 750 g, a rotation speed of 60 r / min, and a wear number of 12,000 times. After the test, the surface of the sample was observed to see if there were holes, fiber breakage, pilling, etc.; the stain resistance test was conducted in accordance with GB / T 30159.1-2013 "Testing and Evaluation of Antifouling Performance of Textiles Part 1: Stain Resistance"; the water absorption test was conducted in accordance with GB / T 21655.1-2023 "Evaluation of moisture absorption and quick-drying properties of textiles - Part 1: Single combination test method" was followed; the antistatic performance test was carried out in accordance with GB / T14342-2015 "Test method for specific resistance of chemical staple fibers", and the sample was balanced at 25°C and 65%RH for 4 hours, and then the volume specific resistance of the sample was tested using a YG321 type specific resistance meter; the washability test was carried out by washing the sample with standard tap water for 5 minutes each time, and after 50 washes, the sample was dried and balanced, and then the volume specific resistance of the washed sample was tested using a YG321 type specific resistance meter in accordance with GB / T 14342-1993; the above tests were repeated three times and the average value was taken. The test results are shown in Table 1. From the data in Table 1, it can be seen that the wear resistance, water absorption and moisture absorption performance, and stain resistance of the cleaning cloth prepared in Examples 1-3 are significantly better than those in Comparative Examples 1-3; compared with Comparative Examples 1-3, the antistatic performance and water wash resistance of the cleaning cloth prepared in Examples 1-3 are also improved to a certain extent. From the data in Example 1 and Comparative Examples 1-3, it can be seen that the hydrophilic modified polyester chips and fluorinated graphene are respectively prepared by chemical modification, and the hydrophilic modified polyester chips and fluorinated graphene are used as raw materials to obtain modified polyester fibers by melt spinning, and then the modified polyester fibers are blended with nylon fibers to prepare the cleaning cloth. By utilizing the synergistic effect of the raw materials, the comprehensive performance of the cleaning cloth can be significantly improved.

[0042] Table 1 Test results of relevant properties of wear-resistant cleaning cloth

[0043]

[0044] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a wear-resistant cleaning cloth, characterized in that: The following steps are involved: Step S1: dispersing the polyester chips in a tert-butyl hydroperoxide solution, heating to 35-55° C., stirring and reacting for 1-3 hours, cooling to room temperature, separating the solid from the liquid, and re-dispersing the obtained solid in a polyvinyl pyrrolidone solution, heating to 75-95° C., stirring and reacting for 1-2 hours, cooling to room temperature, filtering, washing, and drying to obtain a hydrophilic modified polyester chip; Step S2: under stirring conditions, dispersing polyethylene glycol in N,N-dimethylformamide, heating to 95-115° C., reacting for 1-2 hours, then cooling to 85-105° C., adding 4,4,4-trifluorobutyric acid, continuing the reaction for 7-11 hours, cooling to room temperature, performing solid-liquid separation, washing, and drying to obtain fluorinated polyethylene glycol; Step S3: uniformly mixing fluorinated polyethylene glycol, silane coupling agent, anhydrous ethanol and deionized water, raising the temperature to 40-60° C. under stirring conditions, reacting for 0.5-1.5 hours, then adding graphene, stirring and reacting at 50-70° C. for 5-7 hours after ultrasonic dispersion, centrifugally separating, washing, drying, grinding and sieving to obtain fluorinated graphene; Step S4: after the hydrophilic modified polyester slices and the fluorinated graphene are mixed and uniformly mixed, melt blending and extrusion granulation are performed, and then spinning is performed by melt spinning to obtain modified polyester fibers, and then the modified polyester fibers are blended with nylon fibers to obtain wear-resistant cleaning cloth; The mass ratio of polyethylene glycol to 4,4,4-trifluorobutyric acid in step S2 is 80:1.7-2.5; The mass ratio of fluorinated polyethylene glycol, silane coupling agent, anhydrous ethanol, deionized water, and graphene in step S3 is 1.5-2.5:1-2:8-11:50:0.1-0.15; The mass ratio of the hydrophilic modified polyester chips to the fluorinated graphene in step S4 is 60:1-2.

2. The method for preparing the wear-resistant cleaning cloth according to claim 1, characterized in that: The mass ratio of the polyester chips, the tert-butyl hydroperoxide solution and the polyvinyl pyrrolidone solution in step S1 is 1:35-55:15-25.

3. The method for preparing the wear-resistant cleaning cloth according to claim 1, characterized in that: The tert-butyl hydroperoxide solution in step S1 is prepared by mixing tert-butyl hydroperoxide, anhydrous ethanol and deionized water, and the mass percentage of tert-butyl hydroperoxide in the tert-butyl hydroperoxide solution is 0.5-1.5%.

4. The method for preparing the wear-resistant cleaning cloth according to claim 1, characterized in that: The polyvinyl pyrrolidone solution in step S1 is prepared by mixing polyvinyl pyrrolidone with deionized water, and the mass percentage of polyvinyl pyrrolidone in the polyvinyl pyrrolidone solution is 4-6%.

5. The method for preparing the wear-resistant cleaning cloth according to claim 1, characterized in that: The mass volume ratio of polyethylene glycol to N,N-dimethylformamide in step S2 is 0.05-0.15 g / mL.

6. The method for preparing the wear-resistant cleaning cloth according to claim 1, characterized in that: The silane coupling agent in step S3 is silane coupling agent 550 or silane coupling agent 560; the ultrasonic power during the ultrasonic dispersion is 220-240 W, and the ultrasonic time is 50-70 min.

7. A wear-resistant cleaning cloth prepared by the method according to any one of claims 1 to 6.

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