Preparation method of antibacterial regenerated polyester staple fiber

Abstract

The present invention provides a preparation method of antibacterial regenerated polyester staple fibers, which relates to the field of regenerated fibers. The method includes: mixing cobalt nitrate with cetyltrimethylammonium bromide, 2-methylimidazole and water to obtain a mixed solution; reacting the mixed solution at 25 °C for 20 min to obtain ZIF67 nanoparticles, etc. The present invention selects natural antibacterial agent eugenol as the antibacterial functional component, which has good compatibility with the human body. Eugenol is grafted and fixed on the ZIF67 nanoparticles to make it have a high loading concentration and a stable loading effect. Then, the ZIF67 particles loaded with eugenol are introduced into the regenerated polyester solution, which can ensure the uniform dispersion of the antibacterial agent in the regenerated polyester and the persistent antibacterial ability of the polyester staple fibers. The regenerated polyester staple fibers prepared by the precipitation method have the advantages of large specific surface area, soft morphology and easy dispersion in water, and have potential application value in the fields of special paper and non-woven fabric preparation.

Description

Technical Field

[0001] The present invention relates to the field of regenerated fibers, and particularly to a method for preparing antibacterial regenerated polyester staple fibers. Background Art

[0002] Polyester fiber is a synthetic fiber obtained by spinning polyester formed by polycondensation of organic dibasic acids and diols. Due to its excellent wrinkle resistance, shape retention, relatively high strength and elastic recovery ability, it has been widely used in daily life. However, with the continuous high-speed growth of China's chemical fiber industry, the huge demand for polyester products has brought about the problem of shortage of raw materials; at the same time, the environmental pollution caused by various waste polyester scraps is also increasing, and both raw material sources and waste disposal have become thorny problems. Establishing a recycling loop from polyester waste to raw materials and developing new functions and applications of regenerated polyester fibers have great potential.

[0003] Spinning regenerated polyester into a tow and then cutting it can obtain regenerated polyester staple fibers. The regenerated polyester staple fibers have excellent temperature resistance, moisture resistance, corrosion resistance, relatively high physical and mechanical properties and thermal stability, and can be spun alone or blended with cotton, viscose fiber, hemp, wool, vinylon, etc. The obtained yarns are mainly used in the textile and clothing fields. However, the regenerated polyester staple fibers prepared by this method have a smooth surface and lack polar groups themselves, so they are unevenly dispersed in an aqueous medium, resulting in low forming uniformity or even inability to form alone. When used in fields such as non-woven fabrics and special papers, they usually need to be used in combination with other fibers.

[0004] In addition, with the development of science and technology, people's requirements for recycled polyester fibers have gradually increased, and they hope that they can possess more functions to meet specific needs, such as antibacterial properties, flame retardancy, etc. In existing patents, antibacterial agents are often added to polyester and blended and spun to achieve antibacterial effects. For example, in the Chinese patent "A preparation method of antibacterial recycled polyester fiber (Application No.: CN201410221494.6)", a monomer with an antibacterial group, a high-temperature initiator 2,3-dimethyl-2,3-diphenylbutane (DMDPB), and recycled polyester chips are mixed, melt-reacted and extruded into pellets through a twin-screw extruder, and then melt-spun to obtain antibacterial recycled polyester fibers; in the Chinese patent "A processing method of copper ion antibacterial recycled polyester fiber (Application No.: CN20191166358.0)", a copper compound and recycled polyester chips are mixed, extruded into pellets by a twin-screw extruder, and then melt-spun to obtain copper ion antibacterial recycled polyester fibers; the patent application No. 200710023690, "A colored antibacterial moisture-absorbing and sweat-releasing nano-permanent electro-negative ion fiber", adds an organic color masterbatch, a quaternary ammonium salt-based antibacterial agent, nano raw materials, and minerals to polyester chips, mixes and reacts through a screw extruder, and then spins into fibers through a profiled spinneret. Such materials need to be prepared in the molten state of polyester. The viscosity of polyester chips is high, which is not conducive to the uniform dispersion of antibacterial agents in polyester fibers, and the selected antibacterial agents have negative effects on the hydrophilicity, strength, skin-friendliness, etc. of the fibers. Summary of the Invention

[0005] To solve the above problems, the present invention provides a preparation method of antibacterial recycled polyester staple fibers. The present invention selects natural antibacterial agent eugenol as the antibacterial functional component, which has good compatibility with the human body. Eugenol is grafted and fixed on ZIF67 nanoparticles to make it have a high loading concentration and a stable loading effect. Then, the ZIF67 particles loaded with eugenol are introduced into the recycled polyester solution, which can ensure the uniform dispersion of the antibacterial agent in the recycled polyester and the persistent antibacterial ability of the polyester staple fibers. The recycled polyester staple fibers prepared by the precipitation method have the advantages of large specific surface area, soft morphology, and easy dispersion in water, and have potential application value in the fields of special paper and non-woven fabric preparation.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a preparation method of antibacterial recycled polyester staple fibers, comprising the following steps:

[0008] 1) Mix cobalt nitrate with cetyltrimethylammonium bromide, 2-methylimidazole, and water to obtain a mixed solution;

[0009] 2) React the mixed solution obtained in step 1) at 25°C for 20 minutes to obtain ZIF67 nanoparticles;

[0010] 3) Disperse the ZIF67 nanoparticles obtained in step 2) in a potassium sulfate solution to obtain a dispersion;

[0011] 4) Mix the dispersion obtained in step 3) with an eugenol solution to obtain a reaction solution to be reacted, and carry out a Diels - Alder reaction on the reaction solution to be reacted to obtain ZIF67 nanoparticles loaded with eugenol;

[0012] 5) Mix the recycled polyester with a solvent to obtain a recycled polyester slurry, and mix the recycled polyester slurry with the ZIF67 nanoparticles loaded with eugenol obtained in step 4) to obtain a mixed slurry;

[0013] 6) Drop the mixed slurry obtained in step 5) into water with high - speed shearing, and continuously process for 5 - 10 min to obtain antibacterial recycled polyester staple fibers.

[0014] Preferably, in the mixed solution of step 1), the concentration of cobalt nitrate is 12.5 μmol / L, the concentration of 2 - methylimidazole is 700 mmol / L, and the concentration of cetyltrimethylammonium bromide is 0.01 - 0.1 g / L.

[0015] Preferably, in the dispersion of step 3), the concentration of ZIF67 nanoparticles is 3 - 10 g / L;

[0016] The concentration of the potassium sulfate solution is 0.5 - 2 mol / L, and the pH value of the potassium sulfate solution is 8.0 - 10.0.

[0017] Preferably, in the reaction solution to be reacted in step 4), the mass ratio of ZIF67 nanoparticles to eugenol is 10 - 100:1.

[0018] Preferably, the concentration of the eugenol solution in step 4) is 0.1 - 1 g / L, and the solvent of the eugenol solution is ethanol.

[0019] Preferably, the conditions of the Diels - Alder reaction in step 4) include: temperature is 50 - 90 °C, and time is 8 - 24 h.

[0020] Preferably, in the recycled polyester slurry of step 5), the concentration of the recycled polyester is 50 - 150 g / L;

[0021] The solvent is dichloromethane and trifluoroacetic acid, and the volume ratio of dichloromethane to trifluoroacetic acid is 3:7.

[0022] Preferably, in the mixed slurry of step 5), the concentration of ZIF67 nanoparticles loaded with eugenol is 2 - 10 g / L, and the concentration of the recycled polyester is 50 - 150 g / L.

[0023] Preferably, the shearing speed of the high-speed shearing in step 6) is 5000 - 9000 rpm.

[0024] Preferably, the temperature of the mixing of the recycled polyester and the solvent in step 5) is 25 °C, and the mixing time is 30 min.

[0025] The beneficial effects of the present invention are as follows:

[0026] (1) The present invention selects natural antibacterial agent eugenol as the antibacterial functional component, which has good compatibility with the human body;

[0027] (2) Loading eugenol on ZIF67 nanoparticles and fixing it on the ZIF67 nanoparticles through Diels - Alder reaction is beneficial to the high loading concentration and stable loading effect of eugenol;

[0028] (3) Adding the ZIF67 nanoparticles loaded with eugenol to the organic solvent containing recycled polyester can ensure its uniform dispersion;

[0029] (4) The forming of the recycled polyester staple fiber is completed at room temperature, which helps to save energy and protect the environment;

[0030] (5) The recycled polyester staple fiber prepared by the precipitation method has the advantages of large specific surface area, soft morphology and easy dispersion in water, and has potential application value in the fields of special paper and non - woven fabric preparation. Description of the Drawings

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments.

[0032] Figure 1 It is the field emission scanning electron microscope photograph of the ZIF67 nanoparticles loaded with eugenol prepared in Example 1;

[0033] Figure 2 It is the light microscope photograph of the precipitation fiber prepared in Example 1;

[0034] Figure 3 It is the physical picture of the antibacterial recycled polyester precipitation fiber obtained in Example 1. Detailed Embodiments

[0035] The present invention provides a preparation method of antibacterial recycled polyester staple fiber, including the following steps:

[0036] 1) Mix cobalt nitrate with cetyltrimethylammonium bromide, 2 - methylimidazole and water to obtain a mixed solution;

[0037] 2) React the mixed solution obtained in step 1) at 25 °C for 20 min to obtain ZIF67 nanoparticles;

[0038] 3) Disperse the ZIF67 nanoparticles obtained in step 2) in a potassium sulfate solution to obtain a dispersion liquid;

[0039] 4) Mix the dispersion liquid obtained in step 3) with an eugenol solution to obtain a reaction solution to be reacted, and carry out a diene synthesis reaction on the reaction solution to be reacted to obtain ZIF67 nanoparticles loaded with eugenol;

[0040] 5) Mix the recycled polyester with a solvent to obtain a recycled polyester slurry, and mix the recycled polyester slurry with the ZIF67 nanoparticles loaded with eugenol obtained in step 4) to obtain a mixed slurry;

[0041] 6) Drop the mixed slurry obtained in step 5) into water under high-speed shearing, and continuously process for 5 to 10 minutes to obtain antibacterial recycled polyester staple fibers.

[0042] In the present invention, cobalt nitrate is mixed with cetyltrimethylammonium bromide, 2-methylimidazole, and water to obtain a mixed solution. In the present invention, the concentration of cobalt nitrate in the mixed solution is preferably 12.5 μmol / L, the concentration of 2-methylimidazole is preferably 700 mmol / L, and the concentration of cetyltrimethylammonium bromide is preferably 0.01 - 0.1 g / L.

[0043] In the present invention, the obtained mixed solution is reacted at 25°C for 20 minutes to obtain ZIF67 nanoparticles. In the present invention, the ZIF67 nanoparticles are monodisperse and uniformly sized cubes with a side length of 40 - 600 nm. In the present invention, it is preferred that after the reaction is completed, the obtained reaction product is washed and dried to obtain ZIF67 nanoparticles. The present invention has no special limitation on the washing and drying, and those skilled in the art can perform them according to conventional operations.

[0044] In the present invention, the obtained ZIF67 nanoparticles are dispersed in a potassium sulfate solution to obtain a dispersion liquid. In the present invention, the concentration of ZIF67 nanoparticles in the dispersion liquid is preferably 3 - 10 g / L. In the present invention, the concentration of the potassium sulfate solution is preferably 0.5 - 2 mol / L, and the pH value of the potassium sulfate solution is preferably 8.0 - 10.0.

[0045] The dispersion obtained in the present invention is mixed with an eugenol solution to obtain a reaction solution to be reacted, and the reaction solution to be reacted is subjected to a Diels - Alder reaction to obtain ZIF67 nanoparticles loaded with eugenol. In the present invention, the mass ratio of ZIF67 nanoparticles to eugenol in the reaction solution to be reacted is preferably 10 - 100:1. In the present invention, the concentration of the eugenol solution is preferably 0.1 - 1 g / L, and the solvent of the eugenol solution is preferably ethanol. In the present invention, the conditions of the Diels - Alder reaction preferably include: the temperature is 50 - 90 °C, and the time is 8 - 24 h.

[0046] The present invention mixes recycled polyester with a solvent to obtain a recycled polyester slurry, and mixes the recycled polyester slurry with the obtained ZIF67 nanoparticles loaded with eugenol to obtain a mixed slurry. The present invention has no special limitation on the source of the recycled polyester, and conventional commercially available products can be used, such as recycled polyester chips sold by Zhejiang Haili Environmental Protection Technology Co., Ltd. In the present invention, the concentration of recycled polyester in the recycled polyester slurry is preferably 50 - 150 g / L. In the present invention, the solvent is preferably dichloromethane and trifluoroacetic acid, and the volume ratio of dichloromethane to trifluoroacetic acid is preferably 3:7. In the present invention, the concentration of ZIF67 nanoparticles loaded with eugenol in the mixed slurry is preferably 2 - 10 g / L, and the concentration of recycled polyester is preferably 50 - 150 g / L. In the present invention, the temperature for mixing the recycled polyester with the solvent is preferably 25 °C, and the mixing time is preferably 30 min.

[0047] The present invention drops the obtained mixed slurry into water under high - speed shearing and continuously processes it for 5 - 10 min to obtain antibacterial recycled polyester short fibers. In the present invention, the shearing speed of the high - speed shearing is preferably 5000 - 9000 rpm.

[0048] In order to further illustrate the present invention, the following describes the present invention in detail with reference to examples, but they should not be construed as limiting the protection scope of the present invention.

[0049] Example 1

[0050] (1) Dissolve Co(NO3)2·6H2O in an aqueous solution of cetyltrimethylammonium bromide (CTAB), and then quickly mix it with an aqueous solution of 2 - methylimidazole to obtain a mixed solution. The concentration of Co(NO3) 2. 6H2O in the mixed solution is 12.5 mM, the concentration of 2 - methylimidazole is 700 mM, and the CTAB concentration is 0.0625 g / L. Stir the mixed solution at 25 °C for 20 minutes to obtain a reaction product, wash it, and dry it to obtain ZIF67 nanoparticles. The particles are monodisperse and have uniform size cubes with an edge length of about 80 nm;

[0051] (2) The prepared ZIF67 nanoparticles were uniformly dispersed in an aqueous solution of 0.8 M potassium sulfate. The concentration of ZIF67 was 5 g / L, the pH of the solution was 9.0. After mixing evenly, the mixture was added to an ethanol solution containing 0.5 g / L eugenol, where the mass ratio of eugenol to ZIF67 was 1:50. The mixture was stirred at 75 °C for 12 hours to undergo a Diels - Alder reaction to obtain a reaction product. The reaction product was washed and dried to obtain ZIF67 nanoparticles loaded with eugenol.

[0052] (3) The recycled PET (recycled polyester) chips were washed with absolute ethanol to remove dirt, oil stains, etc. on the chip surface. Then the recycled PET chips were dried in vacuo at 105 °C for 4 hours and then added to a dichloromethane / trifluoroacetic acid mixed solvent with a volume ratio of 3:7. It was stirred at 25 °C for 30 min to obtain a PET slurry, where the concentration of recycled polyester was 100 g / L.

[0053] (4) The ZIF67 nanoparticles grafted with eugenol obtained in step (2) were added to the PET slurry in step (3) and mixed evenly to obtain a mixed slurry, where the concentration of nanoparticles was 8 g / L and the concentration of recycled polyester was 100 g / L. After mixing evenly, the slurry was dropped into an aqueous solution under high - speed shearing at a shearing speed of 8000 r / min and continuously processed for 10 minutes to obtain a product. The product was washed and dried to obtain antibacterial recycled polyester staple fibers. The staple fibers prepared by this method were ribbon - shaped, light in weight and thin, about 1 mm in length and about 0.02 mm in width, with an antibacterial rate of 99% against Escherichia coli and 95% against Staphylococcus aureus.

[0054] Example 2

[0055] (1) Co(NO3)2·6H2O was dissolved in an aqueous solution of cetyltrimethylammonium bromide (CTAB), and then quickly mixed with an aqueous solution of 2 - methylimidazole to obtain a mixture. In the mixture, the concentration of Co(NO3) 2. 6H2O was 12.5 mM, the concentration of 2 - methylimidazole was 700 mM, and the CTAB concentration was 0.01 g / L. The mixture was stirred at 25 °C for 20 minutes to obtain a reaction product, which was washed and dried to obtain ZIF67 nanoparticles. The particles were monodisperse cubes with non - uniform sizes, and the side length was about 200 - 600 nm;

[0056] (2) The prepared ZIF67 nanoparticles were uniformly dispersed in an aqueous solution of 0.5 M potassium sulfate with a ZIF67 concentration of 3 g / L and a solution pH of 8.0. After mixing evenly, the mixture was added to an ethanol solution containing 0.1 g / L eugenol, where the mass ratio of eugenol to ZIF67 was 1:10. The mixture was stirred at 75 °C for 8 hours to undergo a Diels - Alder reaction to obtain a reaction product. The reaction product was washed and dried to obtain ZIF67 nanoparticles loaded with eugenol.

[0057] (3) The recycled PET (recycled polyester) chips were washed with absolute ethanol to remove dirt, oil stains, etc. on the chip surface. Then, the recycled PET chips were dried in vacuo at 105 °C for 4 hours and added to a dichloromethane / trifluoroacetic acid mixed solvent with a volume ratio of 3:7. After stirring at 25 °C for 30 min, a PET slurry was obtained, where the concentration of recycled polyester was 50 g / L.

[0058] (4) The ZIF67 nanoparticles grafted with eugenol obtained in step (2) were added to the PET slurry in step (3) and mixed evenly to obtain a mixed slurry, where the concentration of the nanoparticles was 2 g / L and the concentration of recycled polyester was 50 g / L. After mixing evenly, the slurry was dropped into an aqueous solution under high - speed shearing at a shearing speed of 5000 r / min and continuously treated for 10 minutes to obtain a product. The product was washed and dried to obtain antibacterial recycled polyester staple fibers. The overall shape of the staple fibers was still ribbon - like, with uneven dimensions, a length of about 0.2 - 1.5 mm, a width of about 0.01 - 0.05 mm, an antibacterial rate against Escherichia coli of 85% and an antibacterial rate against Staphylococcus aureus of 82%.

[0059] Example 3

[0060] (1) Co(NO3)2·6H2O was dissolved in an aqueous solution of cetyltrimethylammonium bromide (CTAB), and then quickly mixed with an aqueous solution of 2 - methylimidazole to obtain a mixture. The concentration of Co(NO3) 2. 6H2O in the mixture was 12.5 mM, the concentration of 2 - methylimidazole was 700 mM, and the CTAB concentration was 0.03 g / L. The mixture was stirred at 25 °C for 20 minutes to obtain a reaction product. After washing and drying, ZIF67 nanoparticles were obtained. The particles were monodisperse cubes with a side length of about 200;

[0061] (2) The prepared ZIF67 nanoparticles were uniformly dispersed in an aqueous solution of 1.5 M potassium sulfate with a ZIF67 concentration of 8 g / L and a solution pH of 9.5. After mixing evenly, the mixture was added to an ethanol solution containing 0.8 g / L eugenol, where the mass ratio of eugenol to ZIF67 was 1:80. The mixture was stirred at 75 °C for 18 hours to undergo a Diels - Alder reaction to obtain a reaction product, which was washed and dried to obtain ZIF67 nanoparticles loaded with eugenol.

[0062] (3) The recycled PET (recycled polyester) chips were washed with absolute ethanol to remove dirt, oil stains, etc. on the chip surface. Then, the recycled PET chips were dried in vacuo at 105 °C for 4 hours and then added to a dichloromethane / trifluoroacetic acid mixed solvent with a volume ratio of 3:7. After stirring at 25 °C for 30 min, a PET slurry was obtained, where the concentration of recycled polyester was 120 g / L.

[0063] (4) The ZIF67 nanoparticles grafted with eugenol obtained in step (2) were added to the PET slurry in step (3) and mixed evenly to obtain a mixed slurry, where the concentration of the nanoparticles was 6 g / L and the concentration of recycled polyester was 120 g / L. After mixing evenly, the slurry was dropped into an aqueous solution under high - speed shearing at a shearing speed of 6000 r / min and continuously treated for 5 minutes to obtain a product, which was washed and dried to obtain antibacterial recycled polyester staple fibers. The fiber length was about 0.3 - 1.2 mm, the width was about 0.01 - 0.03 mm, the antibacterial rate against Escherichia coli was 90%, and the antibacterial rate against Staphylococcus aureus was 85%.

[0064] Example 4:

[0065] (1) Co(NO3)2·6H2O was dissolved in an aqueous solution of cetyltrimethylammonium bromide (CTAB), and then quickly mixed with an aqueous solution of 2 - methylimidazole to obtain a mixture. The concentration of Co(NO3) 2. 6H2O in the mixture was 12.5 mM, the concentration of 2 - methylimidazole was 700 mM, and the CTAB concentration was 0.1 g / L. The mixture was stirred at 25 °C for 20 minutes to obtain a reaction product, which was washed and dried to obtain ZIF67 nanoparticles. The particles were monodisperse cubes with a relatively small size, and the side length was about 40 - 60 nm;

[0066] (2) The prepared ZIF67 nanoparticles were uniformly dispersed in an aqueous solution of 2 M potassium sulfate with a ZIF67 concentration of 10 g / L and a solution pH of 10.0. After mixing evenly, the mixture was added to an ethanol solution containing 1 g / L eugenol, where the mass ratio of eugenol to ZIF67 was 1:100. The mixture was stirred at 90 °C for 24 hours to undergo a Diels - Alder reaction to obtain a reaction product. The reaction product was washed and dried to obtain ZIF67 nanoparticles loaded with eugenol.

[0067] (3) The recycled PET (recycled polyester) chips were washed with absolute ethanol to remove dirt, oil stains, etc. on the chip surface. Then, the recycled PET chips were dried in vacuo at 105 °C for 4 hours and then added to a dichloromethane / trifluoroacetic acid mixed solvent with a volume ratio of 3:7. After stirring at 25 °C for 30 min, a PET slurry was obtained, where the concentration of recycled polyester was 150 g / L.

[0068] (4) The ZIF67 nanoparticles grafted with eugenol obtained in step (2) were added to the PET slurry in step (3) and mixed evenly to obtain a mixed slurry, where the concentration of the nanoparticles was 10 g / L and the concentration of recycled polyester was 150 g / L. After mixing evenly, the slurry was dropped into an aqueous solution under high - speed shearing at a shearing speed of 9000 r / min and continuously processed for 10 minutes to obtain a product. The product was washed and dried to obtain antibacterial recycled polyester staple fibers. The fibers were in the form of thinner and longer ribbon - like shapes, with a length of about 0.3 - 1.0 mm and a width of about 0.01 mm. The antibacterial rate against Escherichia coli was 99% and the antibacterial rate against Staphylococcus aureus was 98%.

[0069] Although the above - mentioned embodiments have described the present invention in detail, they are only a part of the embodiments of the present invention, not all of them. People can also obtain other embodiments based on this embodiment without creative efforts, and these embodiments all fall within the protection scope of the present invention.

Claims

1. A preparation method of antibacterial regenerated polyester staple fiber, characterized in that, It includes the following steps: 1) Mix cobalt nitrate with cetyltrimethylammonium bromide, 2-methylimidazole, and water to obtain a mixed solution; 2) React the mixed solution obtained in step 1) at 25 °C for 20 min to obtain ZIF67 nanoparticles; 3) Disperse the ZIF67 nanoparticles obtained in step 2) in a potassium sulfate solution to obtain a dispersion; 4) Mix the dispersion obtained in step 3) with an eugenol solution to obtain a reaction solution to be reacted, and perform a Diels-Alder reaction on the reaction solution to be reacted to obtain ZIF67 nanoparticles loaded with eugenol; 5) Mix recycled polyester with a solvent to obtain a recycled polyester slurry, and mix the recycled polyester slurry with the ZIF67 nanoparticles loaded with eugenol obtained in step 4) to obtain a mixed slurry; 6) Drop the mixed slurry obtained in step 5) into water with high-speed shearing and continuously process for 5 - 10 min to obtain antibacterial recycled polyester staple fibers; The concentration of ZIF67 nanoparticles in the dispersion in step 3) is 3 - 10 g / L; the concentration of the potassium sulfate solution is 0.5 - 2 mol / L, and the pH value of the potassium sulfate solution is 8.0 - 10.0; The conditions of the Diels-Alder reaction include: the temperature is 50 - 90 °C, and the time is 8 - 24 h.

2. The preparation method according to claim 1, characterized in that, The concentration of cobalt nitrate in the mixed solution in step 1) is 12.5 μmol / L, the concentration of 2-methylimidazole is 700 mmol / L, and the concentration of cetyltrimethylammonium bromide is 0.01 - 0.1 g / L.

3. The preparation method according to claim 1, characterized in that, The mass ratio of ZIF67 nanoparticles to eugenol in the reaction solution to be reacted in step 4) is 10 - 100:

1.

4. The preparation method according to claim 1, characterized in that, The concentration of the eugenol solution in step 4) is 0.1 - 1 g / L, and the solvent of the eugenol solution is ethanol.

5. The preparation method according to claim 1, wherein The concentration of recycled polyester in the recycled polyester slurry in step 5) is 50 - 150 g / L; The solvent is dichloromethane and trifluoroacetic acid, and the volume ratio of dichloromethane to trifluoroacetic acid is 3:

7.

6. The preparation method according to claim 1, characterized in that, The concentration of ZIF67 nanoparticles loaded with eugenol in the mixed slurry in step 5) is 2 - 10 g / L, and the concentration of recycled polyester is 50 - 150 g / L.

7. The preparation method according to claim 1, characterized in that, The shearing speed of the high-speed shearing in step 6) is 5000 - 9000 rpm.

8. The preparation method according to claim 1, wherein The temperature for mixing the recycled polyester with the solvent in step 5) is 25 °C, and the mixing time is 30 min.

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