Whitening and antibacterial knitted fabric and preparation method thereof

Abstract

The invention discloses a whitening and antibacterial knitted fabric and a preparation method thereof, and belongs to the technical field of functional clothing, Zn (NO3) 2.6 H2O and 1, 4-phthalic acid (H2BDC) are fully dissolved and dispersed through N, N-dimethylformamide (DMF) and dried to prepare Zn-BDC MOF powder, then nicotinamide and chitosan with whitening, spot fading and antibacterial functions pass through N, N-dimethylformamide (DMF) through interaction of subjects and guests, and the functional clothing is obtained. And dissolving N, N-dimethylformamide, and embedding into MOF pores to obtain the whitening skin-care antibacterial functional MOF material. And finally, adding a polyvinyl alcohol solution to obtain a functional finishing agent, and finishing the finishing agent on knitted garments to obtain the knitted fabric with the whitening, skin-care and antibacterial composite functions. The obtained knitted fabric has good whitening, skin care and antibacterial effects and can be applied to sportswear worn in daily life, and knitted garments made of the knitted fabric have the whitening and skin care effects, are good in use comfort and efficiently resist bacteria.

Description

Technical Field

[0001] The present invention relates to the technical field of functional clothing, and in particular to a whitening and antibacterial knitted fabric and a preparation method thereof. Background Art

[0002] In today's society, people's demand for sportswear is no longer limited to basic comfort and functionality, but the pursuit of a more diversified and high-end experience. The emergence of intelligent whitening, skin protection and antibacterial composite functional knitted fabrics is in line with this trend of the times and market demand. With the rapid development of science and technology and the continuous improvement of people's health awareness, exercise has become an indispensable part of daily life. However, long-term outdoor exercise often exposes the skin to various adverse factors, such as ultraviolet radiation, bacteria bred by sweat, etc., which not only affects the health of the skin, but may also cause skin problems.

[0003] In the field of skin care, whitening and skin care have always been the focus of much attention. Traditional sportswear is often powerless in this regard and cannot provide effective protection and care for the skin. At the same time, since the human body sweats a lot during exercise, clothes are prone to breed bacteria, which not only produces odor, but also may cause infection and irritation to the skin.

[0004] The application of antibacterial technology in the fields of medicine and textiles has achieved certain results, but its application in the field of sportswear still needs to be further deepened and expanded. Combining antibacterial function with whitening and skin care function and incorporating it into knitted fabrics is a challenging innovation.

[0005] The rise of smart technology has brought new opportunities for the development of sportswear. Through sensors, smart fibers and other technical means, sportswear can monitor human physiological data in real time, such as body temperature and heart rate, and adjust the performance of clothing according to these data to provide more personalized services. In terms of material science, the research and development of new fiber materials has made it possible to realize the intelligent whitening skin protection and antibacterial composite functions. For example, fabrics with whitening ingredients can slowly release effective substances during contact with the skin to achieve the effect of whitening the skin; fabrics with antibacterial properties can inhibit the growth of bacteria and keep the clothing clean and hygienic.

[0006] To sum up, the birth of intelligent whitening, skin protection and antibacterial composite functional knitted fabrics is the result of multidisciplinary integration, a major breakthrough and innovation in traditional sportswear, and is expected to bring a better, healthier and more comfortable sports experience to sports enthusiasts. Summary of the invention

[0007] The purpose of the present application is to provide a whitening and antibacterial knitted fabric and a preparation method thereof, which can not only achieve the effect of whitening the skin, but also has antibacterial properties, can inhibit the growth of bacteria, and keep the clothing clean and hygienic.

[0008] The present invention provides a method for preparing a whitening and antibacterial knitted fabric, comprising the following steps:

[0009] Step 1: Fully dissolve Zn(NO3)2·6H2O and 1,4-benzenedicarboxylic acid through N,N-dimethylamide and stir evenly to obtain a Zn-BDCMOF solution;

[0010] Step 2: Separate the obtained Zn-BDCMOF solution into products, filter 3-5 times, wash with deionized water 6-8 times, and then vacuum dry the washed Zn-BDCMOF to obtain Zn-BDCMOF powder;

[0011] Step 3: Disperse the Zn-BDCMOF powder in step 2 in N,N-dimethylamide, add nicotinamide and chitosan respectively, embed nicotinamide and chitosan into the pores of MOF, and after ultrasonic treatment, filter the solution, wash it with deionized water several times, and then dry it to obtain antibacterial, whitening and skin care functional MOF powder.

[0012] Step 4, dispersing the functionalized MOF powder obtained in step 3 in deionized water at room temperature, adding polyvinyl alcohol solution, and stirring evenly to obtain a clothing finishing agent;

[0013] Step 5: Apply the clothing finishing agent to the knitted clothing to obtain whitening and antibacterial knitted fabrics.

[0014] Preferably, the concentration of Zn(NO3)2·6H2O is 0.01-0.1 mol / L, the concentration of 1,4-diphthalic acid (H2BDC) is 95%, the concentration of N,N-dimethylformamide (DMF) is 98%, the concentration of nicotinamide is 99%, the concentration of chitosan is 95%, and the concentration of polyvinyl alcohol is 98%.

[0015] Preferably, in step 1, the molar ratio of Zn(NO3)2·6H2O and N,N-dimethylamide of 1,4-phthalic acid is 2-4:6-8:90, and the step of stirring evenly is: magnetic stirring at 200-300 rpm for 4-6 hours to prepare a Zn-BDCMOF solution.

[0016] Preferably, in step 2, the vacuum drying oven drying temperature is 80-120° C., and the drying time is 2-5 hours.

[0017] Preferably, in step three, the molar ratio of nicotinamide, chitosan and Zn-BDCMOF powder is: 2-8:2-8:84-96, the ultrasonic treatment temperature is 25°C to 50°C, the ultrasonic frequency is 20 to 40 kHz, and the ultrasonication is performed for 15 to 50 minutes; the solution is filtered and washed with deionized water for several times and dried to obtain the antibacterial, whitening and skin care functionalized MOF powder. The specific steps are: filtering the solution 3 to 5 times, washing with deionized water 6 to 8 times, and drying in an oven at a temperature of 80 to 120°C for 2 to 5 hours.

[0018] Preferably, in step 4, the functionalized MOF powder obtained in step 3 is dispersed in deionized water at room temperature, a polyvinyl alcohol solution is added, and the mixture is stirred evenly. The specific steps for obtaining a clothing finishing agent solution are as follows: 30 to 50 parts of the functionalized MOF powder are added to a 1 to 10 wt % polyvinyl alcohol solution, the temperature is 30 to 50° C., and the mixture is magnetically stirred at 200 to 300 rpm for 5 to 8 hours to obtain a clothing finishing agent.

[0019] Preferably, in step five, the specific steps of applying the garment finishing agent to the knitted garment are: immersing at 40-60° C. for 20-40 minutes, and drying the dehydrated knitted garment in an oven at 80-110° C. for 20-30 minutes.

[0020] Preferably, when the garment finishing agent is applied to knitted garments, the amount of the garment finishing agent is 4-6% of the weight of the knitted garments, and the bath ratio of the garment finishing agent solution is 1:15-25.

[0021] Preferably, the concentration of Zn(NO3)2·6H2O is 0.01-0.1 mol / L, the concentration of 1,4-diphthalic acid (H2BDC) is 95%, the concentration of N,N-dimethylformamide (DMF) is 98%, the concentration of nicotinamide is 99%, the concentration of chitosan is 95%, and the concentration of polyvinyl alcohol is 98%.

[0022] The present application provides a knitted fabric obtained according to the preparation method of the above-mentioned whitening and antibacterial knitted fabric.

[0023] Therefore, the present application provides a whitening and antibacterial knitted fabric and a preparation method thereof, which has the following beneficial effects:

[0024] 1) The present invention is to fully dissolve and disperse Zn(NO3)2·6H2O and 1,4-dimethylbenzene (H2BDC) through N,N-dimethylformamide (DMF) and dry to prepare Zn-BDC MOF powder, and then utilize the host-guest interaction to dissolve nicotinamide and chitosan with whitening and antibacterial functions through N,N-dimethylformamide and embed them into the MOF pores to obtain whitening, skin care and antibacterial functional MOF materials. Finally, polyvinyl alcohol solution is added to obtain a functional finishing agent, and the finishing agent is applied to knitted clothing to obtain a knitted fabric with whitening, skin care and antibacterial composite functions. The knitted fabric obtained by the present invention has good whitening, skin care and antibacterial effects, can be applied to sportswear for daily wear, and the obtained knitted clothing has whitening, skin care effects, good comfort, and high efficiency antibacterial.

[0025] 2) The knitted fabric with whitening, skin care and antibacterial composite function prepared by the invention is tested and found that the content of nicotinamide for whitening and skin care in the garment is 0.20-0.24%; after washing the garment 50 times, the content of nicotinamide for whitening and skin care in the garment is 0.19-0.21%, so it has good whitening and skin care effect. The antibacterial rate of the garment against Staphylococcus aureus, Escherichia coli and Candida albicans reaches 99.0-99.6%, 99-99.4% and 96.0-96.8% respectively; after washing 50 times, the antibacterial rate of the garment against Staphylococcus aureus, Escherichia coli and Candida albicans reaches 96.0-96.8%, 95.0-95.6% and 92.0-92.4% respectively, reaching good antibacterial property.

[0026] 3) The present invention adopts nicotinamide·chitosan·Zn~BDC MOF solution, the main components of which are nicotinamide, chitosan and Zn~BDC MOF. Among them, nicotinamide is a water-soluble vitamin B3 derivative. In terms of chemical structure, nicotinamide is composed of a pyridine ring and an amide group. Nicotinamide has a variety of important physiological functions in the body, such as whitening and lightening spots, reducing pigmentation and brightening skin color by inhibiting the transfer of melanin to epidermal cells; improving skin barrier function, enhancing the self-protection ability of the skin, and improving the moisturizing property of the skin; controlling oil and shrinking pores, reducing sebum secretion, and making pores look smaller. Chitosan, a natural polysaccharide, has a variety of properties, such as biocompatibility, antibacterial properties, hemostasis, etc. Zn~BDC MOF has a high specific surface area, and they can adsorb and store a large amount of gas molecules, small molecules, etc. The size, shape and properties of its pores can be precisely controlled to meet different application requirements. And it 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 functions and high practicality. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further illustrated by the following examples.

[0028] Example 1

[0029] A method for preparing an intelligent whitening, skin care and antibacterial composite functional knitted fabric, comprising:

[0030] (1) Zn(NO3)2·6H2O and 1,4-diphthalic acid (H2BDC) were fully dissolved in N,N-dimethylformamide (DMF) and stirred evenly.

[0031] (2) Separating the Zn-BDC MOF solution from the product; then, washing the solution with deionized water for 2 to 5 times, and finally, vacuum drying the washed Zn-BDC MOF.

[0032] (3) Zn-BDC MOF powder was dispersed in DMF, and nicotinamide and chitosan were added respectively. Nicotinamide and chitosan were embedded in 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 several times and then dried to obtain antibacterial, whitening and skin care functionalized MOF powder.

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

[0034] (5) Functional finishing of knitted garments. The finishing process conditions are as follows: the amount of finishing agent solution is 4% of the weight of the knitted garments, the bath ratio of the finishing agent solution is 1:15, and the knitted garments are immersed in the finishing agent solution at 40°C for 20 minutes. The dehydrated knitted garments are placed in an oven at 80°C for 20 minutes.

[0035] The knitted fabric with whitening, skin care and antibacterial composite function prepared by the invention was tested and found that the content of nicotinamide for whitening and skin care in the garment was 0.20%; after washing the garment 50 times, the content of nicotinamide for whitening and skin care in the garment was 0.19%, so it has good whitening and skin care effect. The antibacterial rates of the garment against Staphylococcus aureus, Escherichia coli and Candida albicans reached 99.0%, 99.0% and 96.0% respectively; after washing 50 times, the antibacterial rates of the garment against Staphylococcus aureus, Escherichia coli and Candida albicans reached 96.0%, 95.0% and 92.0% respectively, achieving good antibacterial properties.

[0036] Embodiment 2:

[0037] The preparation method of a whitening, skin-care and antibacterial composite functional knitted fabric comprises:

[0038] (1) Zn(NO3)2·6H2O and 1,4-diphthalic acid (H2BDC) were fully dissolved in N,N-dimethylformamide (DMF) and stirred evenly.

[0039] (2) Separating the Zn-BDC MOF solution from the product; then, washing with deionized water for 1 to 3 times, and finally, vacuum drying the washed Zn-BDC MOF.

[0040] (3) Zn-BDC MOF powder was dispersed in DMF, and nicotinamide and chitosan were added respectively. Nicotinamide and chitosan were embedded in 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 several times and then dried to obtain antibacterial, whitening and skin care functionalized MOF powder.

[0041] (4) The functionalized MOF powder is dispersed in deionized water at room temperature, polyvinyl alcohol solution is added, and stirred evenly to obtain a multifunctional finishing agent solution.

[0042] (5) Functional finishing of knitted garments. The finishing process conditions are as follows: the amount of finishing agent solution is 5% of the weight of the knitted garments, the bath ratio of the finishing agent solution is 1:20, and the knitted garments are immersed in the finishing agent solution at 50°C for 30 minutes. The dehydrated knitted garments are placed in an oven at 95°C for 25 minutes.

[0043] The knitted fabric with whitening, skin care and antibacterial composite function prepared by the invention was tested and found that the content of nicotinamide for whitening and skin care in the garment was 0.22%; after washing the garment 50 times, the content of nicotinamide for whitening and skin care in the garment was 0.20%, so it has good whitening and skin care effect. The antibacterial rates of the garment against Staphylococcus aureus, Escherichia coli and Candida albicans reached 99.3%, 99.2% and 96.4% respectively; after washing 50 times, the antibacterial rates of the garment against Staphylococcus aureus, Escherichia coli and Candida albicans reached 96.4%, 95.3% and 92.2% respectively, achieving good antibacterial properties.

[0044] Embodiment 3:

[0045] A method for preparing an intelligent whitening, skin care and antibacterial composite functional knitted fabric, comprising:

[0046] (1) Zn(NO3)2·6H2O and 1,4-diphthalic acid (H2BDC) were fully dissolved in N,N-dimethylformamide (DMF) and stirred evenly.

[0047] (2) Separating the Zn-BDC MOF solution from the product; then, washing with deionized water for 4 to 8 times, and finally, vacuum drying the washed Zn-BDC MOF.

[0048] (3) Zn-BDC MOF powder was dispersed in DMF, and nicotinamide and chitosan were added respectively. Nicotinamide and chitosan were embedded in 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 several times and then dried to obtain antibacterial, whitening and skin care functionalized MOF powder.

[0049] (4) The functionalized MOF powder is dispersed in deionized water at room temperature, polyvinyl alcohol solution is added, and stirred evenly to obtain a multifunctional finishing agent solution.

[0050] (5) Functional finishing of knitted garments. The finishing process conditions are as follows: the amount of finishing agent solution is 6% of the weight of the knitted garment, the bath ratio of the finishing agent solution is 1:25, and the knitted garment is immersed in the finishing agent solution at 60°C for 40 minutes. The dehydrated knitted garment is placed in an oven at 110°C for 30 minutes.

[0051] The knitted fabric with whitening, skin care and antibacterial composite function prepared by the invention was tested and found that the content of nicotinamide for whitening and skin care in the garment was 0.24%; after washing the garment 50 times, the content of nicotinamide for whitening and skin care in the garment was 0.21%, so it has good whitening and skin care effect. The antibacterial rates of the garment against Staphylococcus aureus, Escherichia coli and Candida albicans reached 99.6%, 99.4% and 96.8% respectively; after washing 50 times, the antibacterial rates of the garment against Staphylococcus aureus, Escherichia coli and Candida albicans reached 96.8%, 95.6% and 92.4% respectively, achieving good antibacterial properties.

[0052] Therefore, the present application provides a whitening and antibacterial knitted fabric and a preparation method thereof, which can not only achieve the effect of whitening the skin, but also has antibacterial properties, can inhibit the growth of bacteria, and keep the clothing clean and hygienic.

[0053] In the description of this specification, the description with reference to the terms "an experimental example", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the experimental example or example are included in at least one experimental example or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same experimental example or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more experimental examples or examples in a suitable manner.

[0054] Finally, it should be noted that the above experimental examples are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred experimental examples, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A method for preparing a whitening and antibacterial knitted fabric, characterized in that: The following steps are included: Step 1: Fully dissolve Zn(NO3)2·6H2O and 1,4-benzenedicarboxylic acid through N,N-dimethylamide and stir evenly to obtain a Zn-BDCMOF solution; Step 2: Separate the obtained Zn-BDCMOF solution into products, filter 3-5 times, wash with deionized water 6-8 times, and then vacuum dry the washed Zn-BDCMOF to obtain Zn-BDCMOF powder; Step 3: Disperse the Zn-BDCMOF powder in step 2 in N,N-dimethylamide, add nicotinamide and chitosan respectively, embed nicotinamide and chitosan into the pores of MOF, and after ultrasonic treatment, filter the solution, wash it with deionized water several times, and then dry it to obtain antibacterial, whitening and skin care functional MOF powder. Step 4, dispersing the functionalized MOF powder obtained in step 3 in deionized water at room temperature, adding polyvinyl alcohol solution, and stirring evenly to obtain a clothing finishing agent; Step 5: Apply the clothing finishing agent to the knitted clothing to obtain whitening and antibacterial knitted fabrics.

2. The method for preparing a whitening and antibacterial knitted fabric according to claim 1, characterized in that: The concentration of Zn(NO3)2·6H2O is 0.01-0.1 mol / L, the concentration of 1,4-phthalic acid (H2BDC) is 95%, the concentration of N,N-dimethylformamide (DMF) is 98%, the concentration of nicotinamide is 99%, the concentration of chitosan is 95%, and the concentration of polyvinyl alcohol is 98%.

3. The method for preparing a whitening and antibacterial knitted fabric according to claim 2, characterized in that: In step 1, the molar ratio of Zn(NO3)2·6H2O and N,N-dimethylamide of 1,4-phthalic acid is 2-4:6-8:90, and the stirring step is: magnetic stirring at 200-300 rpm for 4-6 hours to prepare a Zn-BDCMOF solution.

4. The method for preparing a whitening and antibacterial knitted fabric according to claim 3, characterized in that: In step 2, the vacuum drying oven drying temperature is 80-120° C., and the drying time is 2-5 hours.

5. The method for preparing a whitening and antibacterial knitted fabric according to claim 4, characterized in that: In step three, the molar ratio of nicotinamide, chitosan and Zn-BDCMOF powder is: 2-8:2-8:84-96, the ultrasonic treatment temperature is 25°C to 50°C, the ultrasonic frequency is 20 to 40 kHz, and the ultrasonication is 15 to 50 minutes; the solution is filtered and washed with deionized water several times and dried to obtain antibacterial, whitening and skin care functional MOF powder. The specific steps are: the solution is filtered 3 to 5 times, washed with deionized water 6 to 8 times, the oven drying temperature is 80 to 120°C, and the drying time is 2 to 5 hours.

6. The method for preparing a whitening and antibacterial knitted fabric according to claim 1, characterized in that: In step 4, the functionalized MOF powder obtained in step 3 is dispersed in deionized water at room temperature, polyvinyl alcohol solution is added, and stirred evenly. The specific steps of obtaining the clothing finishing agent solution are as follows: 30 to 50 parts of functionalized MOF powder are added to 1 to 10 wt% polyvinyl alcohol solution, the temperature is 30 to 50° C., and magnetic stirring is performed at 200 to 300 rpm for 5 to 8 hours to obtain the clothing finishing agent.

7. The method for preparing a whitening and antibacterial knitted fabric according to claim 6, characterized in that: In step 5, the specific steps of applying the garment finishing agent to the knitted garment are: immersing at 40-60° C. for 20-40 minutes, and drying the dehydrated knitted garment in an oven at 80-110° C. for 20-30 minutes.

8. The method for preparing a whitening and antibacterial knitted fabric according to claim 7, characterized in that: When the garment finishing agent is applied to knitted garments, the amount of the garment finishing agent used is 4-6% of the weight of the knitted garments, and the bath ratio of the garment finishing agent solution is 1:15-25.

9. The method for preparing a whitening and antibacterial knitted fabric according to claim 8, characterized in that: The concentration of Zn(NO3)2·6H2O is 0.01-0.1 mol / L, the concentration of 1,4-phthalic acid (H2BDC) is 95%, the concentration of N,N-dimethylformamide (DMF) is 98%, the concentration of nicotinamide is 99%, the concentration of chitosan is 95%, and the concentration of polyvinyl alcohol is 98%.

10. A knitted fabric obtained according to the method for preparing a whitening and antibacterial knitted fabric according to any one of claims 1 to 9.