Skin-lightening and antibacterial knitted fabric and preparation method thereof

Abstract

A skin-lightening and antibacterial knitted fabric and a preparation method thereof are provided. Firstly, Zn(NO3)2.6H2O and 1,4-benzenedicarboxylic acid (H2BDC) are fully dissolved and dispersed via N,N-dimethylformamide (DMF) and dried to prepare Zn-BDC MOF powder, secondly, nicotinamide and chitosan with skin-lightening and antibacterial functions are dissolved via N,N-dimethylformamide and embedded in pores of MOF by host-guest interaction to obtain functionalized MOF powder with skin-lightening, skincare and antibacterial. Finally, a polyvinyl alcohol solution is added to obtain a functional finishing agent, and the finishing agent is finished on the knitted clothing to obtain a composite functional knitted fabric with skin-lightening skincare and antibacterial. The knitted fabric has good skin-lightening, skincare, and antibacterial effect, and can be applied to daily sportswear, and the knitted clothing has skin-lightening and skincare effects, good comfort, and high-efficiency antibacterial.

Description

CROSS REFERENCE TO THE RELATED APPLICATIONS

[0001] This application is based upon and claims priority to Chinese Patent Application No. 202411705330.0, filed on Nov. 26, 2024, the entire contents of which are incorporated herein by reference.TECHNICAL FIELD

[0002] The present invention relates to the technical field of functional clothing, in particular to a skin-lightening and antibacterial knitted fabric and a preparation method thereof.BACKGROUND

[0003] In contemporary society, the demand for sportswear for people is no longer limited to basic comfort and functionality, but rather pursues a more diversified and high-end experience. The emergence of composite functional knitted fabrics with intelligent skin-lightening, skincare, and antibacterial are the trend of the times and market demand. With the rapid development of science and technology and the continuous improvement of people's health awareness, sports have become an indispensable part of daily life. However, long-term outdoor sports often expose the skin to various adverse factors, such as ultraviolet radiation, bacteria produced by sweat, etc., which not only affect the health of the skin, but also may cause skin problems.

[0004] In the field of skincare, skin-lightening and skincare have always been the attention focus. Conventional sportswear is normally ineffective in this aspect and cannot provide effective protection and care for the skin. Meanwhile, due to the human body will sweat a large amount during movement, clothing is easy to breed bacteria, not only producing odor, but also causing skin infection and irritation.

[0005] The application of antibacterial technology in medical treatment, textile, and other fields has made some achievements, but there is still need to be further deepened and expanded in the application of sportswear. And it is a challenging innovation to combine antibacterial function with skin-lightening and skincare function into knitted fabrics.

[0006] The rise of intelligent technology has brought new opportunities for the development of sportswear. Through the sensor, intelligent fiber, and other technical methods, sportswear can monitor human physiological data in real-time, such as body temperature, heart rate, etc., and the performance of the clothing can be adjusted according to these data to provide more personalized services. In the field of material science, the development of new fiber materials provides the possibility for the realization of the composite function of intelligent skin-lightening, skincare, and antibacterial. For example, the fabric with skin-lightening ingredients can slowly release an effective substance during contact with the skin, so as to achieve the skin-lightening effect; the fabric with antimicrobial properties can inhibit bacterial growth and maintain the cleanliness and hygiene of clothing.

[0007] In summary, the emergence of composite functional knitted fabrics with intelligent skin-lightening, skincare and antibacterial is the achievement of interdisciplinary integration, a major breakthrough and innovation in conventional sportswear, and it is expected to bring more high-quality, healthy, and comfortable sports experience to the majority of sports enthusiasts.SUMMARY

[0008] An objective of the present application is to provide a skin-lightening and antibacterial knitted fabric and a preparation method thereof, which can not only achieve the effect of skin-lightening, but also have antibacterial properties, which can inhibit the growth of bacteria and maintain the cleanliness and hygiene of clothing.

[0009] A preparation method for a skin-lightening and antibacterial knitted fabric is provided in the present invention, including the following steps:

[0010] step 1, fully dissolving Zn(NO3)2.6H2O and 1,4-benzenedicarboxylic acid (H2BDC) via N,N-dimethylformamide (DMF) and stirring uniformly to obtain a Zn-BDC MOF solution;

[0011] step 2, performing a product separation on the obtained Zn-BDC MOF solution, filtering for 3-5 times, washing with deionized water for 6-8 times, and then drying the washed Zn-BDC MOF under vacuum to obtain Zn-BDC MOF powder;

[0012] step 3, dispersing the Zn-BDC MOF powder in step 2 in N,N-dimethylformamide, adding nicotinamide and chitosan respectively, embedding the nicotinamide and chitosan into the pores of a metal-organic framework (MOF), after ultrasonic treatment, filtering the solution and washing with deionized water for several times and drying to obtain functionalized MOF powder with antibacterial, skin-lightening and skincare;

[0013] step 4, dispersing the functionalized MOF powder obtained in step 3 in deionized water at room temperature, adding a polyvinyl alcohol solution, stirring uniformly, and obtaining a clothing finishing agent;

[0014] step 5, finishing the clothing finishing agent onto knitted clothing to obtain a skin-lightening and antibacterial knitted fabric.

[0015] Preferably, a concentration of Zn(NO3)2.6H2O is 0.01-0.1 mol / L, a concentration of 1,4-benzenedicarboxylic acid is 95%, a concentration of N, N-dimethylformamide is 98%, a concentration of nicotinamide is 99%, a concentration of chitosan is 95%, and a concentration of polyvinyl alcohol is 98%.

[0016] Preferably, in step 1, a molar ratio of Zn(NO3)2.6H2O, 1,4-benzenedicarboxylic acid, and N,N-dimethylformamide is (2-4): (6-8): 90, the step of stirring uniformly is: the Zn-BDC MOF solution is prepared by magnetic stirring at 200-300 rpm for 4-6 h.

[0017] Preferably, in step 2, a drying temperature of a vacuum drying oven is 80-120° C., drying time is 2-5 h.

[0018] Preferably, in step 3, a molar ratio of nicotinamide, chitosan and Zn-BDC MOF powder is (2-8): (2-8): (84-96), a temperature of the ultrasonic treatment is 25-50° C., ultrasound for 15-50 min under an ultrasonic frequency of 20-40 kHz; the specific steps of filtering the solution and washing with deionized water for several times and dried to obtain functionalized MOF powder with antibacterial, skin-lightening and skincare are as follows: the solution is filtered 3-5 times, washed 6-8 times with deionized water, temperature of oven drying is 80-120° C., and a drying time is 2-5 h.

[0019] Preferably, in step 4, the specific steps of dispersing the functionalized MOF powder obtained in step 3 in deionized water at room temperature, adding the polyvinyl alcohol solution, stirring uniformly, and obtaining the clothing finishing agent are as follows: 30-50 parts of functionalized MOF powder are added to 1-10wt % polyvinyl alcohol solution, the temperature is 30-50° C., magnetic stirring at 200-300 rpm for 5-8 h, and the clothing finishing agent is obtained.

[0020] Preferably, in step 5, the specific steps of finishing the clothing finishing agent onto knitted clothing are as follows: the knitted clothing is impregnated at 40-60° C. for 20-40 min, and the dehydrated knitted clothing is dried in the oven at 80-110° C. for 20-30 min.

[0021] Preferably, when the clothing finishing agent is finished on the knitted clothing, a dosage of the clothing finishing agent is 4-6% of a weight of the knitted clothing, and a bath ratio of the clothing finishing agent solution is 1:(15-25).

[0022] Preferably, a concentration of Zn(NO3)2.6H2O is 0.01-0.1 mol / L, a concentration of 1,4-benzenedicarboxylic acid (H2BDC) is 95%, a concentration of N,N-dimethylformamide (DMF) is 98%, a concentration of nicotinamide is 99%, a concentration of chitosan is 95%, and a concentration of polyvinyl alcohol is 98%.

[0023] This present application provides a knitted fabric obtained according to the above-mentioned preparation method for the skin-lightening and antibacterial knitted fabric.

[0024] Therefore, the present application provides a skin-lightening and antibacterial knitted fabric and a preparation method thereof, which has the following beneficial effects:

[0025] 1) In the present invention, Zn(NO3)2.6H2O and 1,4-benzenedicarboxylic acid (H2BDC) were fully dissolved and dispersed via N,N-dimethylformamide (DMF) and dried to obtain Zn-BDC MOF powder, then, nicotinamide and chitosan with skin-lightening and antibacterial functions were dissolved via N,N-dimethylformamide and embedded in the pores of MOF by host-guest interaction to obtain functionalized MOF materials with antibacterial, skin-lightening and skincare. Finally, a polyvinyl alcohol solution was added to obtain a functional finishing agent, and the finishing agent was finished on the knitted clothing to obtain the composite functional knitted fabrics with skin-lightening, skincare and antibacterial. The knitted fabric obtained by the present invention has good skin-lightening, skincare and antibacterial effects, and can be applied to daily sportswear, and the knitted clothing has skin-lightening and skincare effects, good comfort and high-efficiency antibacterial.

[0026] 2) The composite functional knitted fabrics with skin-lightening, skincare and antibacterial prepared by this present invention were tested, wherein the content of nicotinamide with skin-lightening and skincare in this clothing was 0.20-0.24%; after 50 times of washing, the content of nicotinamide with the skin-lightening and skincare in this clothing was 0.19-0.21%, therefore, the knitted fabrics have good skin-lightening and skincare effect. The antibacterial rates of the clothing against Staphylococcus aureus, Escherichia coli and Candida albicans were 99.0-99.6%, 99.0-99.4% and 96.0-96.8%, respectively; after 50 times of washing, the antibacterial rates in this clothing against Staphylococcus aureus, Escherichia coli and Candida albicans were 96.0-96.8%, 95.0-95.6% and 92.0-92.4%, respectively, which reaches good antibacterial properties.

[0027] 3) In the present invention adoption, the main ingredients of nicotinamide ·chitosan ·Zn-BDC MOF solution are nicotinamide, chitosan and Zn-BDC MOF. Wherein, nicotinamide is a water-soluble vitamin B3 derivative. In chemical structure, nicotinamide is composed of a pyridine ring and an amide group. Nicotinamide has a variety of important physiological functions in organisms, such as skin-lightening and diminished dark spots, pigmentation is reduced and skin color is brighten by inhibiting the transfer of melanin to epidermal cells; the skin barrier function is improved, the skin's self-protection ability is enhanced, and the skin's moisture retention is improved; and sebum secretion is reduced by controlling oil and minimizing pores, so that pores look smaller. Chitosan, a natural polysaccharide, has a variety of properties, such as biocompatibility, antibacterial, hemostatic and so on. Zn-BDC MOF has a high specific surface area, which can adsorb and store a large number of gas molecules, small molecular substances, etc. The size, shape and properties of pores can be precisely controlled to meet different application requirements. Additionally, Zn-BDC MOF also has good chemical stability under certain conditions and can maintain structural integrity in different chemical environments. The polymer finishing agent prepared by combining the synergistic advantages of the three materials has excellent function and high practicability.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The technical scheme of the present invention is further explained below by drawings and embodiments.Embodiment 1

[0029] The preparation method for composite functional knitted fabrics with intelligent skin-lightening, skincare and antibacterial, including:

[0030] (1) Zn(NO3)2.6H2O and 1,4-benzenedicarboxylic acid (H2BDC) were fully dissolved via N,N-dimethylformamide (DMF) and stirred uniformly.

[0031] (2) A product separation was performed on the Zn-BDC MOF solution; then washed with deionized water for 2-5 times, and finally, the washed Zn-BDC MOF was dried under a vacuum.

[0032] (3) The Zn-BDC MOF powder was dispersed in DMF, nicotinamide and chitosan were added respectively, and the nicotinamide and chitosan were embedded into the pores of MOF through non-covalent interactions such as hydrogen bonds and van der Waals forces, after ultrasonic treatment, the solution was filtered and washed with deionized water for several times and dried to obtain functionalized MOF powder with antibacterial, skin-lightening and skincare.

[0033] (4) The functionalized MOF powder was dispersed in deionized water at room temperature, a polyvinyl alcohol solution was added, and stirred uniformly, and a multifunctional finishing agent solution was obtained.

[0034] (5) Functional finishing of knitted clothing, wherein the finishing process conditions were as follows: the dosage of finishing agent solution was 4% of the weight of knitted clothing, the bath ratio of finishing agent solution was 1:15, and the knitted clothing was immersed in the finishing agent solution, immersion at 40° C. for 20 min. The dehydrated knitted clothing was dried in the oven at 80° C. for 20 min.

[0035] The composite functional knitted fabrics with skin-lightening, skincare and antibacterial prepared by this present invention were tested, wherein content of nicotinamide with the skin-lightening and skincare in this clothing in this clothing was 0.20%; after 50 times of washing, the content of nicotinamide with the skin-lightening and skincare in this clothing was 0.19%, therefore, the knitted fabrics have good skin-lightening and skincare effect. The antibacterial rates of the clothing against Staphylococcus aureus, Escherichia coli and Candida albicans were 99.0%, 99.0% and 96.0%, respectively; after 50 times of washing, the antibacterial rates in this clothing against Staphylococcus aureus, Escherichia coli and Candida albicans were 96.0%, 95.0% and 92.0%, respectively, which reaches good antibacterial properties.Embodiment 2

[0036] The preparation method for composite functional knitted fabrics with skin-lightening, skincare and antibacterial, including:

[0037] (1) Zn(NO3)2.6H2O and 1,4-benzenedicarboxylic acid (H2BDC) were fully dissolved via N,N-dimethylformamide (DMF) and stirred uniformly.

[0038] (2) A product separation was performed on the Zn-BDC MOF solution; then washed with deionized water for 1-3 times, and finally, the washed Zn-BDC MOF was dried under vacuum.

[0039] (3) The Zn-BDC MOF powder was dispersed in DMF, nicotinamide and chitosan were added respectively, and the nicotinamide and chitosan were embedded into the pores of MOF through non-covalent interactions such as hydrogen bonds and van der Waals forces, after ultrasonic treatment, the solution was filtered and washed with deionized water for several times and dried to obtain functionalized MOF powder with antibacterial, skin-lightening and skincare.

[0040] (4) The functionalized MOF powder was dispersed in deionized water at room temperature, a polyvinyl alcohol solution was added, and stirred uniformly, and a multifunctional finishing agent solution was obtained.

[0041] (5) Functional finishing of knitted clothing, wherein the finishing process conditions were as follows: the dosage of finishing agent solution was 5% of the weight of knitted clothing, the bath ratio of finishing agent solution was 1:20, and the knitted clothing was immersed in the finishing agent solution, immersion at 50° C. for 30 min. The dehydrated knitted clothing was dried in the oven at 95° C. for 25 min.

[0042] The composite functional knitted fabrics with skin-lightening, skincare and antibacterial prepared by this present invention were tested, wherein content of nicotinamide with the skin-lightening and skincare in this clothing in this clothing was 0.22%; after 50 times of washing, the content of nicotinamide with the skin-lightening and skincare in this clothing was 0.20%, therefore, the knitted fabrics have good skin-lightening and skincare effect. The antibacterial rates of the clothing against Staphylococcus aureus, Escherichia coli and Candida albicans were 99.3%, 99.2% and 96.4%, respectively; after 50 times of washing, the antibacterial rates in this clothing against Staphylococcus aureus, Escherichia coli and Candida albicans were 96.4%, 95.3% and 92.2%, respectively, which reaches good antibacterial properties.Embodiment 3

[0043] The preparation method for composite functional knitted fabrics with intelligent skin-lightening, skincare and antibacterial, including:

[0044] (1) Zn(NO3)2.6H2O and 1,4-benzenedicarboxylic acid (H2BDC) were fully dissolved via N,N-dimethylformamide (DMF) and stirred uniformly.

[0045] (2) A product separation was performed on the Zn-BDC MOF solution; then washed with deionized water for 4-8 times, and finally, the washed Zn-BDC MOF was dried under vacuum.

[0046] (3) The Zn-BDC MOF powder was dispersed in DMF, nicotinamide and chitosan were added respectively, and the nicotinamide and chitosan were embedded into the pores of MOF through non-covalent interactions such as hydrogen bonds and van der Waals forces, after ultrasonic treatment, the solution was filtered and washed with deionized water for several times and dried to obtain functionalized MOF powder with antibacterial, skin-lightening and skincare.

[0047] (4) The functionalized MOF powder was dispersed in deionized water at room temperature, a polyvinyl alcohol solution was added, and stirred uniformly, and a multifunctional finishing agent solution was obtained.

[0048] (5) Functional finishing of knitted clothing, wherein the finishing process conditions were as follows: the dosage of finishing agent solution was 6% of the weight of knitted clothing, the bath ratio of finishing agent solution was 1:25, and the knitted clothing was immersed in the finishing agent solution, immersion at 60° C. for 40 min. The dehydrated knitted clothing was dried in the oven at 110° C. for 30 min.

[0049] The composite functional knitted fabrics with skin-lightening, skincare and antibacterial prepared by this present invention were tested, wherein the content of nicotinamide with the skin-lightening and skincare in this clothing was 0.24%; after 50 times of washing, the content of nicotinamide with the skin-lightening and skincare in this clothing was 0.21%, therefore, the knitted fabrics have good skin-lightening and skincare effect. The antibacterial rates of the clothing against Staphylococcus aureus, Escherichia coli and Candida albicans were 99.6%, 99.4% and 96.8%, respectively; after 50 times of washing, the antibacterial rates in this clothing against Staphylococcus aureus, Escherichia coli and Candida albicans were 96.8%, 95.6% and 92.4%, respectively, which reaches good antibacterial properties.

[0050] Therefore, the present application provides a skin-lightening and antibacterial knitted fabric and preparation method thereof, which can not only achieve the effect of skin-lightening, but also have antibacterial properties, which can inhibit the growth of bacteria and maintain the cleanliness and hygiene of clothing.

[0051] In the description of this specification, the reference terms ‘one embodiment’, ‘an example’, ‘specific example’, etc., are used to describe at least one embodiment or example of the present invention that incorporates the specific features, structures, materials or characteristics described by the embodiment or example. In this specification, the indicative expression of the above terms does not necessarily refer to the same experimental examples or examples. Moreover, the specific features, structures, materials or characteristics described can be combined in an appropriate manner in any one or more experimental examples or examples.

[0052] Finally, it should be noted that the above examples are merely used for describing the technical solutions of the present invention, rather than limiting the same. Although the present invention has been described in detail with reference to the preferred examples, those of ordinary skill in the art should understand that the technical solutions of the present invention may still be modified or equivalently replaced. However, these modifications or substitutions should not make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A preparation method for a skin-lightening and antibacterial knitted fabric, comprising the following steps:step 1, fully dissolving Zn(NO3)2.6H2O and 1,4-benzenedicarboxylic acid (H2BDC) via N,N-dimethylformamide (DMF) and stirring uniformly to obtain a Zn-BDC MOF solution;step 2, performing a product separation on the Zn-BDC MOF solution, filtering for 3-5 times, washing with deionized water for 6-8 times, and then drying washed Zn-BDC MOF under vacuum to obtain a Zn-BDC MOF powder;step 3, dispersing the Zn-BDC MOF powder obtained in the step 2 in N N-dimethylformamide, adding nicotinamide and chitosan respectively, embedding the nicotinamide and the chitosan into pores of a metal-organic framework (MOF), after an ultrasonic treatment, filtering a resulting solution and washing with deionized water for several times and drying to obtain a functionalized MOF powder with antibacterial, skin-lightening, and skincare;step 4, dispersing the functionalized MOF powder obtained in the step 3 in deionized water at room temperature, adding a polyvinyl alcohol solution, stirring uniformly, and obtaining a clothing finishing agent; andstep 5, finishing the clothing finishing agent onto knitted clothing to obtain the skin-lightening and antibacterial knitted fabric.

2. The preparation method for the skin-lightening and antibacterial knitted fabric according to claim 1, wherein a concentration of the Zn(NO3)2.6H2O is 0.01-0.1 mol / L, a concentration of the 1,4-benzenedicarboxylic acid is 95%, a concentration of the N,N-dimethylformamide is 98%, a concentration of the nicotinamide is 99%, a concentration of the chitosan is 95%, and a concentration of polyvinyl alcohol is 98%.

3. The preparation method for the skin-lightening and antibacterial knitted fabric according to claim 2, wherein in the step 1, a molar ratio of the Zn(NO3)2.6H2O, the 1,4-benzenedicarboxylic acid, and the N, N-dimethylformamide is (2-4): (6-8): 90, the step of stirring uniformly is: the Zn-BDC MOF solution is prepared by magnetic stirring at 200-300 rpm for 4-6 h.

4. The preparation method for the skin-lightening and antibacterial knitted fabric according to claim 3, wherein in the step 2, a drying temperature of a vacuum drying oven is 80-120° C., a drying time is 2-5 h.

5. The preparation method for the skin-lightening and antibacterial knitted fabric according to claim 4, wherein in the step 3, a molar ratio of the nicotinamide, the chitosan, and the Zn-BDC MOF powder is (2-8): (2-8): (84-96), a temperature of the ultrasonic treatment is 25-50° C., ultrasound for 15-50 min under an ultrasonic frequency of 20-40 kHz; the steps of filtering the resulting solution and washing with deionized water for several times and drying to obtain the functionalized MOF powder with antibacterial, skin-lightening, and skincare are as follows: the resulting solution is filtered 3-5 times, washed 6-8 times with deionized water, a temperature of oven drying is 80-120° C., and a drying time is 2-5 h.

6. The preparation method for the skin-lightening and antibacterial knitted fabric according to claim 1, wherein in the step 4, the steps of dispersing the functionalized MOF powder obtained in the step 3 in deionized water at room temperature, adding the polyvinyl alcohol solution, stirring uniformly, and obtaining the clothing finishing agent are as follows: 30-50 parts of the functionalized MOF powder are added to a 1-10 wt % polyvinyl alcohol solution, a temperature is 30-50° C., magnetic stirred at 200-300 rpm for 5-8 h, and the clothing finishing agent is obtained.

7. The preparation method for the skin-lightening and antibacterial knitted fabric according to claim 6, wherein in the step 5, the steps of finishing the clothing finishing agent onto the knitted clothing are as follows: the knitted clothing is impregnated at 40-60° C. for 20-40 min, and dehydrated knitted clothing is dried in an oven at 80-110° C. for 20-30 min.

8. The preparation method for the skin-lightening and antibacterial knitted fabric according to claim 7, wherein when the clothing finishing agent is finished on the knitted clothing, a dosage of the clothing finishing agent is 4-6% of a weight of the knitted clothing, and a bath ratio of a clothing finishing agent solution is 1:(15-25).

9. The preparation method for the skin-lightening and antibacterial knitted fabric according to claim 8, wherein a concentration of the Zn(NO3)2.6H2O is 0.01-0.1 mol / L, a concentration of the 1,4-benzenedicarboxylic acid is 95%, a concentration of the N N-dimethylformamide is 98%, a concentration of the nicotinamide is 99%, a concentration of the chitosan is 95%, and a concentration of polyvinyl alcohol is 98%.

10. A knitted fabric obtained by the preparation method for the skin-lightening and antibacterial knitted fabric according to claim 1.

11. The knitted fabric according to claim 10, wherein in the preparation method, a concentration of the Zn(NO3)2.6H2O is 0.01-0.1 mol / L, a concentration of the 1,4-benzenedicarboxylic acid is 95%, a concentration of the N, N-dimethylformamide is 98%, a concentration of the nicotinamide is 99%, a concentration of the chitosan is 95%, and a concentration of polyvinyl alcohol is 98%.

12. The knitted fabric according to claim 11, wherein in the step 1 of the preparation method, a molar ratio of the Zn(NO3)2.6H2O, the 1,4-benzenedicarboxylic acid, and the N, N-dimethylformamide is (2-4): (6-8): 90, the step of stirring uniformly is: the Zn-BDC MOF solution is prepared by magnetic stirring at 200-300 rpm for 4-6 h.

13. The knitted fabric according to claim 12, wherein in the step 2 of the preparation method, a drying temperature of a vacuum drying oven is 80-120° C., a drying time is 2-5 h.

14. The knitted fabric according to claim 13, wherein in the step 3 of the preparation method, a molar ratio of the nicotinamide, the chitosan, and the Zn-BDC MOF powder is (2-8): (2-8):(84-96), a temperature of the ultrasonic treatment is 25-50° C., ultrasound for 15-50 min under an ultrasonic frequency of 20-40 kHz; the steps of filtering the resulting solution and washing with deionized water for several times and drying to obtain the functionalized MOF powder with antibacterial, skin-lightening, and skincare are as follows: the resulting solution is filtered 3-5 times, washed 6-8 times with deionized water, a temperature of oven drying is 80-120° C., and a drying time is 2-5 h.

15. The knitted fabric according to claim 10, wherein in the step 4 of the preparation method, the steps of dispersing the functionalized MOF powder obtained in the step 3 in deionized water at room temperature, adding the polyvinyl alcohol solution, stirring uniformly, and obtaining the clothing finishing agent are as follows: 30-50 parts of the functionalized MOF powder are added to a 1-10 wt % polyvinyl alcohol solution, a temperature is 30-50° C., magnetic stirred at 200-300 rpm for 5-8 h, and the clothing finishing agent is obtained.

16. The knitted fabric according to claim 15, wherein in the step 5 of the preparation method, the steps of finishing the clothing finishing agent onto the knitted clothing are as follows: the knitted clothing is impregnated at 40-60° C. for 20-40 min, and dehydrated knitted clothing is dried in an oven at 80-110° C. for 20-30 min.

17. The knitted fabric according to claim 16, wherein in the preparation method, when the clothing finishing agent is finished on the knitted clothing, a dosage of the clothing finishing agent is 4-6% of a weight of the knitted clothing, and a bath ratio of a clothing finishing agent solution is 1:(15-25).

18. The knitted fabric according to claim 17, wherein in the preparation method, a concentration of the Zn(NO3)2.6H2O is 0.01-0.1 mol / L, a concentration of the 1,4-benzenedicarboxylic acid is 95%, a concentration of the N N-dimethylformamide is 98%, a concentration of the nicotinamide is 99%, a concentration of the chitosan is 95%, and a concentration of polyvinyl alcohol is 98%.