CN118685876A - A rare earth functional material for antibacterial spinning and rare earth antibacterial fabric - Google Patents

Abstract

The present invention provides a rare earth functional material for antibacterial spinning and a rare earth antibacterial fabric, wherein the rare earth functional material comprises a rare earth composite material CMO and a polymer quantum dot powder P.CD in a mass ratio of (3-5): (1-2). The present invention introduces highly antibacterial rare earth functional materials and polymer quantum dot powder P.CD into the spun fibers, thereby increasing the loading rate of the antibacterial material and verifying the washability and duration of the antibacterial defense of the highly antibacterial material.

Description

A rare earth functional material for antibacterial spinning and rare earth antibacterial fabric

Technical Field

The invention belongs to the field of textiles, and in particular relates to a rare earth functional material for antibacterial spinning and a rare earth antibacterial fabric.

Background Art

In warm and humid environments, clothes may be contaminated by microorganisms. This environment is most suitable for the growth of bacteria, which can produce unpleasant odors. When the human body is active, textile fabrics affect sweating and the formation of odors. Sweat secretion, bacterial count and humid environment are the three main factors that cause skin odor. Since textile materials are organic materials, they are favorable substrates for the growth of microorganisms, so the sweat produced by human skin provides nutrients for bacteria. Under extreme conditions, microorganisms can cause serious problems such as fabric rotting, unpleasant odors and infectious diseases. Spinning is one of the raw materials for clothing and can come into direct contact with sweat. Since 99% of sweat is water, once a person sweats, it provides an excellent breeding environment for bacterial growth, thus producing body odor. The development of textile fabrics with antimicrobial ingredients has increasingly attracted the interest of researchers.

Different types of substances such as oxidants, coagulants, metals or quaternary ammonium compounds are used as antimicrobial additives, but most antimicrobial agents are harmful and toxic. Current research focuses on the high activity of silver against viruses, fungi and bacteria, and its application in wound dressings, creams, surgical prostheses, dental implants and medical coatings has been widely developed.

Silver solutions of different concentrations are chemically plated onto nylon fibers, but the disadvantages of the coating are becoming increasingly apparent. Silver is stripped from the fibers by washing, and the antibacterial efficiency of the product is reduced. Nanosilver particles and colloidal silver have been used to enhance the antibacterial properties of polymer fibers, but they may migrate into the body or leach out, and there are also limitations of high cost.

Summary of the invention

In view of this, the present invention aims to overcome the defects in the prior art and proposes a rare earth functional material and rare earth antibacterial fabric for antibacterial spinning. The present invention introduces highly antibacterial rare earth functional materials into the fibers of antibacterial spinning, improves the loading rate of the antibacterial material, and verifies the washability of the highly antibacterial material and the duration of antibacterial defense.

To achieve the above object, the technical solution of the present invention is achieved as follows:

In a first aspect, the present invention provides a rare earth functional material for antibacterial spinning, comprising a rare earth composite material CMO and a polymer quantum dot powder P.CD in a mass ratio of (3-5): (1-2);

The preparation method of the rare earth composite material CMO comprises the following steps: adding cerium salt and manganese sulfate to water, heating and stirring, adding acetic acid, and then dropping a NaOH solution to precipitate, then centrifuging to remove the supernatant, and then washing, drying, concentrating, and calcining the precipitate to obtain the rare earth composite material CMO;

The preparation method of the polymer quantum dot powder P.CD comprises the following steps:

The polymer raw material is dissolved and diluted with water, stirred evenly and then heated, and then naturally cooled to room temperature. Finally, the solution is dialyzed to remove impurities, and the dialyzed product is freeze-dried to obtain polymer quantum dot powder P.CDs.

Preferably, the mass ratio of the cerium salt to manganese sulfate is (20-60): (0.1-5).

Preferably, the cerium salt is one or more of cerium nitrate, cerium sulfate and cerium chloride.

Preferably, the mass ratio of acetic acid to cerium salt is (1-10): (20-60).

Preferably, the concentration of the NaOH solution is 0.1-0.3 g/mL.

Preferably, in the preparation method of the rare earth composite material CMO, the heating temperature is 80-160° C. and the stirring time is 21-24 hours.

Preferably, the calcination temperature is 300-800° C., and the calcination time is 1-6 h.

Preferably, the mass ratio of the polymer raw material to water is: 1-10 g of the polymer raw material is added to every 1-30 mL of water.

Preferably, the polymer raw material is polyethyleneimine (PEI) and/or polyethylene (PE).

Preferably, in the preparation method of the polymer quantum dot powder P.CD, the heating temperature is 160-180°C and the heating time is 10-12h.

Preferably, a 10 kDa cut-off bag is used for the dialysis, the solution is changed every 4-12 hours, and the dialysis time is 10-60 hours.

In a second aspect, the present invention also provides a method for preparing the above-mentioned rare earth functional material, comprising the following steps:

The rare earth composite material CMO is added with water and an aqueous dispersant and then sand-milled. The particle size of the rare earth composite material CMO after sand-milling is 600-700 nm. The rare earth composite material CMO after sand-milling and polymer quantum dot powder P.CD are mixed and stirred evenly to obtain a rare earth functional material.

In a third aspect, the present invention also provides the use of the above rare earth functional materials in the preparation of rare earth antibacterial fabrics.

Preferably, the added mass percentage of the rare earth functional material in the rare earth antibacterial fabric is 1-2.5‰. This percentage is the optimized addition amount. When the addition amount of the rare earth functional material in the rare earth antibacterial fabric is less than 1‰, the antibacterial effect drops sharply, and when the addition amount of the rare earth functional material in the rare earth antibacterial fabric is greater than 2.5‰, the yarn surface is relatively rough and cannot be woven into yarn. At the same time, the loading rate, washability and duration of antibacterial defense of the antibacterial material will drop sharply.

Compared with the prior art, the present invention has the following advantages:

(1) The rare earth composite material CMO in the present invention has a strong active oxygen catalytic effect due to its unique charge structure and infrared radiation, which can cause microorganisms to undergo oxidative stress and lead to the death of microorganisms. The antibacterial rate of the rare earth functional material of the present invention against Escherichia coli and Staphylococcus aureus is ≥98%, and the antibacterial rate against Candida albicans is ≥95%.

(2) Since the size of the polymer quantum dots in the present invention is much smaller than the diameter of the fiber, a uniformly distributed nanostructure can be formed inside the fiber. This nanostructure can effectively disperse stress. In addition, there is a strong interface interaction between the polymer quantum dots and the fiber, which can improve the binding force inside the fiber, reduce the relative sliding between the parts of the fiber when it is subjected to external force, and thus improve the tensile properties of the fiber.

(3) The polymer quantum dots in the present invention can undergo cross-linking reactions with the fiber and the rare earth material through chemical bonds or physical adsorption to form a three-dimensional network structure. This network structure can effectively limit the movement of the molecular chains inside the fiber, so that when the fiber is subjected to external forces, the relative sliding between the molecular chains is reduced, thereby improving the tensile properties of the fiber. At the same time, after the introduction and cross-linking of the polymer quantum dots, the yarn and the rare earth material can be firmly locked together. This can improve the loading rate, washability and duration of the antibacterial defense of the antibacterial yarn.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a scanning electron microscope image of a rare earth functional material formulation;

FIG2 is a diagram showing the inhibitory effect of rare earth functional materials on Escherichia coli ( E.coli );

FIG3 is a diagram showing the inhibitory effect of yarn on Escherichia coli ( E.coli );

FIG4 is a rare earth functional material loading test result of the yarn;

Figure 5 shows the inhibitory effect of yarn on Escherichia coli ( E.coli ) after washing.

DETAILED DESCRIPTION

Unless otherwise defined, the technical terms used in the following examples have the same meanings as those generally understood by those skilled in the art to which the present invention belongs. All chemical substances used in the following examples were used without further treatment, and distilled water (ρ=18.2 MΩ·cm, 25°C) was from Millipore milli-Q water purification system. Escherichia coli ( E.coli ) was from Beijing Sihuan Biopharmaceutical Co., Ltd. Unless otherwise specified, all the reagents are conventional biochemical reagents; the experimental methods are conventional methods unless otherwise specified.

The present invention will be described in detail below with reference to the embodiments.

Example 1

(1) Preparation of rare earth composite material CMO

Take 20g of cerium nitrate and 0.1g of manganese sulfate and add them to 50ml of water, stir at 80℃ for 21h, add 10ml of AcOH as a capping agent, then add 10g/100ml NaOH solution dropwise to precipitate, then centrifuge at 8000rpm for 60min to remove the supernatant, then wash the precipitate with water and ethanol, dry and concentrate it, and then calcine at 800℃ for 1h to obtain the rare earth composite material CMO.

(2) Preparation of polymer quantum dot powder P.CD

Take 5g of polyethyleneimine (PEI) and add it to 9.5mL of distilled water for dilution. Transfer the mixed solution to a stainless steel autoclave lined with polytetrafluoroethylene. After heating at 160℃ for 10 hours, take out the autoclave and cool it naturally to room temperature. Finally, dialyze the distilled water with a 10 kDa cutoff bag for more than 48 hours, changing the solution every 8 hours to remove all impurities. Finally, freeze-dry the product to obtain polymer quantum dot powder P.CD.

(3) Preparation of rare earth functional materials

50g of rare earth composite material CMO was added to 450mL of water and 5g of aqueous 2800 dispersant, stirred evenly, and placed in a sand mill for sand grinding. The total sand grinding time was 6 hours. The particle size of the rare earth composite material CMO after sand grinding was 600-700nm. The rare earth composite material CMO and polymer quantum dot powder P.CD after sand grinding were mixed in a mass ratio of 3:1 and stirred evenly. A particle size analyzer was used to monitor the particle size distribution of the rare earth functional material formula. As can be seen from Figure 1, the particle size after the formula was matched was stable at around 678 nm.

Example 2

(1) Preparation of rare earth composite material CMO

Take 40g of cerium nitrate and 3g of manganese sulfate and add them to 200ml of water, stir at 100℃ for 24h, add 1ml of AcOH as a capping agent, then add 30g/100ml NaOH solution dropwise to precipitate, then centrifuge at 30000rpm for 60min to remove the supernatant, then wash the precipitate with water and ethanol, dry and concentrate it, and then calcine at 600℃ for 3h to obtain the rare earth composite material CMO.

(2) Preparation of polymer quantum dot powder P.CD

Take 1g of polyethylene (PE) and add it to 20mL of distilled water for dilution. Transfer the mixed solution to a stainless steel autoclave lined with polytetrafluoroethylene. After heating at 160°C for 12 hours, take out the autoclave and cool it naturally to room temperature. Finally, dialyze the distilled water with a 10 kDa cutoff bag for more than 48 hours, changing the solution every 8 hours to remove all impurities. Finally, freeze-dry the product to obtain polymer quantum dot powder P.CD.

(3) Preparation of rare earth functional materials

Add 50g of rare earth composite material CMO to 450mL of water and 5g of aqueous 2800 dispersant, stir evenly, and place in a sand mill for sand grinding. The total sand grinding time is 6 hours. The particle size of the rare earth composite material CMO after sand grinding is 600-700nm. Mix the sand-milled rare earth composite material CMO and polymer quantum dot powder P.CD in a mass ratio of 3:2 and stir evenly.

Example 3

(1) Preparation of rare earth composite material CMO

Take 60g of cerium nitrate and 5g of manganese sulfate and add them to 500ml of water, stir at 100℃ for 24h, add 8ml of AcOH as a capping agent, then add 20g/100ml NaOH solution dropwise to precipitate, then centrifuge at 30000rpm for 60min to remove the supernatant, then wash the precipitate with water and ethanol, dry and concentrate it, and calcine it at 300℃ for 6h to obtain the rare earth composite material CMO.

(2) Preparation of polymer quantum dot powder P.CD

Take 5g of polyethyleneimine (PEI) and 5g of polyethylene (PE) and add them to 30mL of distilled water for dilution, and transfer the mixed solution to a stainless steel autoclave lined with polytetrafluoroethylene. After heating at 180°C for 10 hours, take out the autoclave and cool it naturally to room temperature. Finally, dialyze the distilled water with a 10 kDa cutoff bag for more than 48 hours, changing the solution every 8 hours to remove all impurities. Finally, the product was freeze-dried to obtain polymer quantum dot powder P.CD.

(3) Preparation of rare earth functional materials

Add 50g of rare earth composite material CMO to 450mL of water and 5g of aqueous 2800 dispersant, stir evenly, and place in a sand mill for sand grinding. The total sand grinding time is 6 hours. The particle size of the rare earth composite material CMO after sand grinding is 600-700nm. Mix the sand-milled rare earth composite material CMO and polymer quantum dot powder P.CD in a mass ratio of 5:2 and stir evenly.

Comparative Example 1

The difference between this comparative example and Example 1 is that the rare earth composite material CMO and the polymer quantum dot powder P.CD are in a mass ratio of 6:1.

Comparative Example 2

The difference between this comparative example and Example 1 is that the rare earth composite material CMO and the polymer quantum dot powder P.CD are in a mass ratio of 1:1.

Comparative Example 3

The difference between this comparative example and Example 1 is that the rare earth compound used in step (1) is lanthanum chloride.

Comparative Example 4

The difference between this comparative example and Example 1 is that in step (1), the mass of cerium nitrate is 65 g and the mass of manganese sulfate is 0.1 g.

Comparative Example 5

The difference between this comparative example and Example 1 is that in step (1), the mass of cerium nitrate is 20 g and the mass of manganese sulfate is 6 g.

Comparative Example 6

The difference between this comparative example and Example 1 is that the mass of polyethyleneimine (PEI) in step (2) is 0.5 g.

Comparative Example 7

The difference between this comparative example and Example 1 is that the mass of polyethyleneimine (PEI) in step (2) is 11 g.

Comparative Example 8

The difference between this comparative example and Example 1 is that polymer quantum dot powder P.CD is not added in step (3).

Test Example 1 Antibacterial Test of Rare Earth Composite Material CMO Powder

First, weigh 10 mg of the rare earth composite material CMO powder prepared in Examples 1-3 and Comparative Examples 3-5, add 1 mL of PBS buffer, and use ultrasonic assisted dispersion. At this time, the concentration of the rare earth composite material CMO is 10 g/L. Then, in an ultra-clean workbench, draw 100 uL of the prepared rare earth composite material CMO solution and mix it with 800 uL of PBS buffer. At the same time, the control group directly draws 900 uL PBS buffer and leaves it at room temperature for use.

Then, the Escherichia coli that had undergone secondary activation was diluted 10 ⁴ times in a clean bench using PBS according to a 10-fold dilution gradient, and the strain concentration was controlled at 1×10 ⁵ -1×10 ⁶ cfu/mL. 100uL of the diluted Escherichia coli bacterial solution was added to 900uL of PBS (control group) and 900uL of the rare earth composite material CMO solution prepared in Examples 1-3 and Comparative Examples 3-5 (experimental group, CMO with a final concentration of 1g/L), respectively, and placed in a constant temperature shaker at 180rpm, incubated at 37°C for 18h, and then coated on an LB plate, and then the coated LB plate was placed in a constant temperature incubator for overnight culture, and the experimental results were observed after colonies grew on the plate.

As shown in FIG2 , Examples 1-3 and Comparative Example 3 have very good inhibitory effects on Escherichia coli, with an inhibitory effect of 99-100%. However, Comparative Examples 4 and 5 did not show good antibacterial effects, with an antibacterial effect of only 20-40%. Similarly, we conducted antibacterial tests on Examples 1-3 against Staphylococcus aureus ( S. aureus ) and Candida albicans ( C. albicans ), and the results showed that the antibacterial rate of Staphylococcus aureus was greater than 98%, and the antibacterial rate of Candida albicans was greater than 95%.

Application example: Antibacterial spinning method

2000 g of polyethylene terephthalate (PET) was taken respectively, and 2 g of the rare earth functional materials prepared in Example 1 and Comparative Examples 1, 2, 6, 7, and 8 were introduced respectively, and the rare earth functional materials were sliced, crushed, and dissolved. After the temperature was raised to 120° C., the melt was extruded into the air through a spinneret under the action of a screw, naturally cooled, and drawn into fibers. The prepared fibers were spun into yarns using conventional methods in the art and were named Y1, Y2, Y3, Y4, Y5, and Y6, respectively.

Test Example 2 Antibacterial Testing of Textiles

The fiber prepared in the application example was spun into yarn by conventional methods in the field for antibacterial testing. The testing method was carried out according to GB/T 20944.3-2008 "Evaluation of Antibacterial Properties of Textiles" Part 3: Oscillation Method issued by the state on April 29, 2008. Specific process: 3-4g of each of the yarns Y1, Y2, Y3, Y4, Y5, Y6 to be tested and the control yarn (GB/T 20944.3-2008 standard control sample purchased from the institution) were taken into a 250mL beaker, and 250mL of 0.2% phosphorus-free standard detergent was added to the beaker. After mixing, the sample was placed in a magnetic stirrer for stirring. The stirring conditions were: 600 rpm, 49°C, and the sample was taken out after stirring for 45 minutes. It was rinsed with pure water twice, 1 minute each time. This was a washing cycle, and a total of 5 cycles were performed. Finally, in order to eliminate the interference of detergent, the yarn was fully washed with clean water and placed in a sterile plate to dry. After drying, cut the test samples and control samples into small pieces, place them in clean 250mL conical flasks, seal them, and sterilize them in a high-pressure steam sterilizer at 121℃ for 20min. After sterilization, take them out, cool them at room temperature, add them to 70mL of PBS under sterile conditions, and place them at room temperature for use.

Take out the Escherichia coli cultured after secondary activation, dilute the Escherichia coli 10000 times with sterile PBS, take 5mL of Escherichia coli after dilution and add it to the conical flask of the yarn to be tested and the control sample containing 70mL PBS, mix well and place each yarn group to be tested and the control sample group in a constant temperature shaker, 24℃, 150rpm shake for 18h. After each experimental group shakes for 18h, take 1mL of the shaking contact liquid for 10-fold gradient dilution, dilute to 0, 10, 100, and 1000 times respectively, take 100μL to a sterile LB plate, and spread it on the plate. Set up 3 parallel groups for each sample and each dilution gradient. After spreading, place it in a constant temperature incubator at 37℃ for culture. Finally, select a plate with a suitable number of colonies for observation, and judge the antibacterial ability of the textile according to the number of colonies.

The experimental results are shown in Figure 3. The antibacterial effect of yarn Y1 on E. coli reaches 99.2%, while the antibacterial effect of yarn Y2, Y3, Y4, Y5, and Y6 on E. coli is between 40-70%. This is because the antibacterial rare earth functional material CMO powder can provide a strong antibacterial effect, and the polymer quantum dot powder P.CD can make the CMO powder better adhere to the yarn surface. Therefore, when the two are mixed in an appropriate proportion and added to the spinning process of the yarn, the produced yarn products can show very good antibacterial effects. When the proportion is not appropriate or the synthesis ratio of the polymer quantum dot powder P.CD is not correct, the polymer quantum dot powder P.CD cannot provide the most effective cross-linking effect, which leads to poor antibacterial properties of the yarn products.

Test Example 3: Testing of rare earth functional material loading on textiles

The yarns Y1, Y2, Y3, Y4, Y5, and Y6 were scanned and irradiated with an electron microscope to observe the number of rare earth functional materials embedded on the yarn surface within a length range of 200 μm, and the load capacity of the rare earth functional materials on the yarn was determined based on the number.

The experimental results are shown in Figure 4. Within the same field of view, the number of rare earth materials loaded on yarn Y1 is about 226, while the number of rare earth materials on other yarns Y1, Y2, Y3, Y4, Y5, and Y6 is significantly smaller than that on Y1, indicating that yarn Y1 can carry rare earth materials more effectively, making the rare earth materials more and more tightly combined with the yarn, which in turn leads to enhanced washability and antibacterial ability of the yarn.

Test Example 4: Tensile force test of textiles

Place yarns Y1, Y2, Y3, Y4, Y5, and Y6 in the fixtures of the universal mechanical testing machine, and adjust the position and angle of the fixtures to keep the samples in the correct position and state during the test. After confirming that the sample is clamped and positioned correctly, start the machine, perform the breaking tensile strength test, and record the strength when the yarn breaks.

The experimental results are shown in Table 1. The diameter of yarn Y1 is slightly thicker than that of other yarn products, but its breaking strength far exceeds that of other yarns. Taking breaking strength/diameter as the comprehensive evaluation standard of tensile force, the value of yarn Y1 is 218, while that of other yarns is between 130-150. The tensile performance of yarn Y1 is significantly improved.

Table 1 Tensile force test of yarn products

name Diameter (mm) Breaking strength (N) Breaking strength/diameter Y1 0.245 53.46 218.20 Y2 0.238 35.72 150.08 Y3 0.241 35.29 146.43 Y4 0.211 29.72 140.85 Y5 0.223 30.87 138.43 Y6 0.206 28.41 137.91

Test Example 5: Washability test of textiles

The water washing resistance test of textiles refers to the washing method of the national standard GB/T 12490-2014 "Textile Color Fastness Test". The specific method is to add 4g of phosphorus-free laundry detergent per liter of water to make a washing solution, add 400mL of washing solution into a 500mL beaker, add 5g of yarn Y1, Y2, Y3, Y4, Y5, and Y6, and then add 10 steel balls with a diameter of 6mm to increase friction. Finally, stir with a stirring paddle at a speed of 120rpm. Each stirring time of 30min is a washing cycle. After a total of 50 cycles of washing, all samples are dried and the antibacterial effect of the yarn is tested again. The water washing resistance of the textiles is tested based on the antibacterial effect.

The experimental results are shown in Figure 5. After 50 washes, the antibacterial effect of yarn Y1 was 95.5%, a decrease of only 2%, while the antibacterial effect of yarns Y2, Y3, Y4, Y5, and Y6 decreased significantly, ranging from 30-40%, respectively. This decrease cannot meet the washing requirements in daily life.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A rare earth functional material for antibacterial spinning is characterized in that: the rare earth functional material comprises the following components in percentage by mass (3-5): the rare earth composite material CMO and the polymer quantum dot powder P.CD of (1-2);

the preparation method of the rare earth composite material CMO comprises the following steps: adding cerium salt and manganese sulfate into water, heating and stirring, adding acetic acid, dropwise adding NaOH solution, separating out precipitate, centrifuging to remove supernatant, washing the precipitate, drying and concentrating, and calcining to obtain rare earth composite material CMO;

The preparation method of the polymer quantum dot powder P, CD comprises the following steps:

Dissolving and diluting the polymer raw material with water, stirring uniformly, heating, naturally cooling to room temperature after heating, finally dialyzing the solution to remove impurities, and freeze-drying the dialyzed product to obtain polymer quantum dot powder P.

2. The rare earth functional material for antibacterial spinning according to claim 1, characterized in that: the mass ratio of the cerium salt to the manganese sulfate is (20-60): (0.1-5).

3. The rare earth functional material for antibacterial spinning according to claim 1, characterized in that: the cerium salt is one or more of cerium nitrate, cerium sulfate and cerium chloride.

4. The rare earth functional material for antibacterial spinning according to claim 1, characterized in that: the mass ratio of the acetic acid to the cerium salt is (1-10): (20-60); the concentration of the NaOH solution is 0.1-0.3 g/mL.

5. The rare earth functional material for antibacterial spinning according to claim 1, characterized in that: the heating temperature in the preparation method of the rare earth composite material CMO is 80-160 ℃, and the stirring time is 21-24 hours; the calcination temperature is 300-800 ℃, and the calcination time is 1-6 h.

6. The rare earth functional material for antibacterial spinning according to claim 1, characterized in that: the mass to water ratio of the polymer raw materials is as follows: 1 to 10 g of the polymer raw material is added to 1 to 30 mL of water.

7. The rare earth functional material for antibacterial spinning according to claim 1, characterized in that: the polymer raw material is polyethyleneimine and/or polyethylene.

8. The rare earth functional material for antibacterial spinning according to claim 1, characterized in that: the heating temperature is 160-180 ℃ and the heating time is 10-12 hours in the preparation method of the polymer quantum dot powder P and CD; the dialysis is performed by using a cut-off bag of 10 kDa, and the solution is changed every 4-12 hours, and the dialysis duration is 10-60 h.

9. A method for preparing the rare earth functional material according to any one of claims 1 to 8, characterized in that: the method comprises the following steps:

Adding water and a water-based dispersing agent into the rare earth composite material CMO, then sanding, wherein the particle size of the rare earth composite material CMO after sanding is 600-700nm, and uniformly mixing and stirring the sanded rare earth composite material CMO and polymer quantum dot powder P and CD to obtain the rare earth functional material.

10. Use of the rare earth functional material according to any one of claims 1-8 for the preparation of rare earth antibacterial fabrics, characterized in that: the rare earth functional material in the fiber of the rare earth antibacterial fabric is added in the mass percentage of 1-2.5 per mill.