Antibacterial skin-friendly fabric and preparation method thereof

Abstract

The invention belongs to the technical field of fabrics, and particularly relates to an antibacterial skin-friendly fabric and a preparation method thereof. According to the antibacterial skin-friendly fabric prepared by the invention, EGCG and CuCe-MOF are compounded together, so that the advantages of EGCG and CuCe-MOF can be effectively utilized to realize synergistic antibacterial effect. Zinc oxide has antibacterial performance, dispersibility of zinc oxide in the fabric can be achieved through KH-550 modified zinc oxide, KH-550 contains amido, the amido can improve the antibacterial effect, then the antibacterial performance of the fabric is improved, and meanwhile, polycaprolactone particles are selected to be matched with the bamboo fibers, so that the skin-friendly effect can be well achieved.

Description

Technical Field

[0001] This invention belongs to the field of fabric technology. More specifically, it relates to an antibacterial and skin-friendly fabric and its preparation method. Background Technology

[0002] Antibacterial materials are typically introduced into fabrics through direct spinning or finishing methods. The resulting antibacterial fibers must prevent microorganisms from damaging the pigments attached to the fibers and inhibit the growth and reproduction of bacteria and mold. These functions not only protect the human body but also facilitate fabric storage. Direct spinning involves mixing antibacterial materials with fiber chips, allowing the antibacterial materials to "infiltrate" the fiber interior. These fibers exhibit high wash fastness and a long release time of antibacterial active components. Direct spinning is commonly used in the production of chemical fibers. Finishing involves grafting the antibacterial active components onto the fiber surface during post-processing. For example, cations adsorb onto the fiber surface to form ionic bonds, and some antibacterial materials form a film that firmly binds to the fiber.

[0003] Epigallocatechin gallate (EGCG) is the most abundant special catechin in tea, accounting for 40% to 50% of tea polyphenols and 9% to 13% of the total weight of tea. EGCG has a unique three-dimensional chemical structure with six ortho- and tho-hydroxyl groups, and it is superior to other catechins in terms of antibacterial, antiviral, antioxidant, and biological activities.

[0004] MOFs are a new generation of antibacterial coordination polymers. Their antibacterial mechanism is the synergistic effect of metal ions and organic ligands. The nanostructured MOFs can reduce the growth and attachment of bacteria on their surface. Electrostatic attraction, hydrophobicity and receptor-ligand interaction may lead to membrane damage and inactivation of key cellular components, thereby causing bacterial death.

[0005] How to effectively utilize the respective advantages of EGCG and MOFs to achieve long-lasting antibacterial effects urgently needs further research.

[0006] CN118835467A discloses a method for preparing MOF-based slow-release antibacterial and formaldehyde-removing fabric, comprising the following steps: preparing MOF@activated carbon fiber composite material; blending MOF@activated carbon fiber composite material with cotton and linen materials; and using a solid adhesive to wet-mill and mix the MOF@activated carbon fiber composite material, followed by hot-melt coating and pressing onto the blended material for reinforcement. This invention belongs to the field of fabric preparation technology, and provides a method for preparing MOF-based slow-release antibacterial and formaldehyde-removing fabric, developing antibacterial fibers containing MOF, and improving the antibacterial durability of the antibacterial fibers.

[0007] CN119615624A discloses a whitening and antibacterial knitted fabric and its preparation method, belonging to the field of functional clothing technology. The method involves fully dissolving and dispersing Zn(NO3)2·6H2O and 1,4-phthalic acid (H2BDC) using N,N-dimethylamide (DMF) and drying them to prepare Zn-BDC MOF powder. Then, utilizing host-guest interactions, nicotinamide and chitosan, which have whitening, spot-fading, and antibacterial functions, are dissolved in N,N-dimethylamide and embedded into the pores of the MOF, resulting in a whitening, skin-care, and antibacterial functionalized MOF material. Finally, a polyvinyl alcohol solution is added to obtain a functional finishing agent, which is then applied to the knitted garment to obtain a knitted fabric with whitening, skin-care, and antibacterial composite functions. The knitted fabric obtained by this invention has good whitening, skin-care, and antibacterial effects and can be applied to everyday sportswear. The resulting knitted garments have whitening and skin-care effects, good comfort, and highly effective antibacterial properties.

[0008] CN119078298A discloses an antibacterial aromatic microfiber suede-like fabric and its preparation method. The preparation method includes the following steps: immersing the fabric in a 2-methylimidazole solution for impregnation; after impregnation, adding a zinc source solution to the 2-methylimidazole solution to react and obtain a fabric with MOF nanorods grown on its surface; depositing electrospun nanofibers loaded with aromatic essential oils onto the fabric with MOF nanorods to obtain an antibacterial aromatic textile base layer; and bonding the antibacterial aromatic textile base layer onto the microfiber suede-like layer to obtain the antibacterial aromatic microfiber suede-like fabric. Applying the antibacterial aromatic microfiber suede-like fabric prepared by this invention to automotive interior materials gives it good antibacterial properties and aromatic release function.

[0009] Adding MOF materials to fabrics can achieve antibacterial properties, but the antibacterial durability is poor. Summary of the Invention

[0010] The technical problem to be solved by this invention is to overcome the defects and deficiencies of the existing technology and provide an antibacterial and skin-friendly fabric and its preparation method. The antibacterial and skin-friendly fabric prepared by this invention effectively utilizes the advantages of both EGCG and CuCe-MOF to achieve synergistic antibacterial effects. Zinc oxide itself has antibacterial properties; by modifying zinc oxide with KH-550, its dispersibility in the fabric can be improved. Furthermore, KH-550 contains amine groups, which can also enhance the antibacterial effect, thereby improving the antibacterial performance of the fabric. Simultaneously, the use of polycaprolactone particles combined with bamboo fiber in this application provides a good skin-friendly effect.

[0011] The purpose of this invention is to provide an antibacterial and skin-friendly fabric.

[0012] Another objective of this invention is to provide a method for preparing an antibacterial and skin-friendly fabric.

[0013] The above-mentioned objective of this invention is achieved through the following technical solution:

[0014] An antibacterial and skin-friendly fabric, comprising the following raw materials by weight:

[0015] 160-240 parts of polycaprolactone granules;

[0016] Bamboo fiber 20-40 parts;

[0017] 1-2 parts of alginic acid;

[0018] 3-7 parts of EGCG@CuCe-MOF composite material;

[0019] 4-8 parts of ZnO modified with KH-550.

[0020] In this invention, a preferred technical solution is provided, wherein the preparation method of the EGCG@CuCe-MOF composite material includes the following steps:

[0021] (1) Add copper salt, cerium salt and 2-methylimidazole to ethanol and water, disperse by ultrasonication, then carry out hydrothermal reaction, cool to room temperature, filter, wash and dry to obtain CuCe-MOF;

[0022] (2) Epigallocatechin gallate (EGCG) and CuCe-MOF obtained in step (1) were added to deionized water, stirred at room temperature, centrifuged to obtain a solid, washed, and vacuum dried to obtain EGCG@CuCe-MOF composite material.

[0023] Furthermore, in step (1), the copper salt is one of copper nitrate, copper chloride, and copper acetate; the cerium salt is one of cerium nitrate, cerium chloride, and cerium acetate; and the molar ratio of the copper salt, cerium salt, and 2-methylimidazole is 1:0.5~1.5:4~6.

[0024] Furthermore, in step (1), the volume ratio of ethanol to water is 3:1; the ultrasonic dispersion time is 20~40 min; the hydrothermal reaction conditions are hydrothermal reaction at 100~140℃ for 6~10 h; and the drying is drying at 80~100℃ for 10~14 h.

[0025] Furthermore, in step (2), the mass ratio of EGCG to CuCe-MOF obtained in step (1) is 0.5~1.5:1; the stirring time at room temperature is 3~5h, and the stirring speed is 3000~5000rpm.

[0026] Furthermore, in step (2), the centrifugation conditions are centrifugation at 9000~11000r / min for 20~40min; the vacuum drying is vacuum drying at 40~80℃ for 18~26h.

[0027] In a further preferred embodiment of the present invention, the method for preparing KH-550 modified ZnO includes the following steps: dispersing nano zinc oxide and KH-550 in deionized water, stirring and reacting, cooling to room temperature, filtering, washing, and drying at 80~100℃ for 10~14h to obtain KH-550 modified ZnO.

[0028] Furthermore, the particle size of the nano zinc oxide is 50~90nm, and the mass ratio of the nano zinc oxide to KH-550 is 1:0.6~0.8.

[0029] Furthermore, the stirring reaction is carried out at 40-60°C for 6-10 hours; the drying is carried out at 80-100°C for 10-14 hours.

[0030] The preparation method of the antibacterial and skin-friendly fabric described above includes the following steps:

[0031] The raw materials are mixed, and then fed into a screw extruder for melt extrusion and spinning at a speed of 720~760m / min. The resulting fabric is then woven to obtain a fungus-friendly and skin-friendly material.

[0032] The present invention has the following beneficial effects:

[0033] The present invention provides an antibacterial and skin-friendly fabric. By combining EGCG with CuCe-MOF, the surface of MOF can be functionalized and hydroxyl groups can be introduced. In addition, Cu and Ce have bactericidal effects. Therefore, the advantages of both can be effectively utilized to achieve synergistic effects, resulting in a fabric with excellent antibacterial properties.

[0034] Zinc oxide has antibacterial properties, and its dispersion in fabrics can be achieved by modifying zinc oxide with KH-550. Furthermore, KH-550 contains amine groups, which can also enhance the antibacterial effect, thereby improving the antibacterial properties of the fabric. In addition, the polycaprolactone particles used in this application, combined with bamboo fiber, can achieve a good skin-friendly effect. Detailed Implementation

[0035] The present invention will be further illustrated below with reference to specific embodiments, but the embodiments do not limit the present invention in any way. Unless otherwise specified, the reagents, methods, and equipment used in the present invention are conventional reagents, methods, and equipment in this technical field.

[0036] Bamboo fiber: 30mm~50mm in length.

[0037] Unless otherwise specified, all reagents and materials used in the following examples are commercially available.

[0038] Example 1

[0039] An antibacterial and skin-friendly fabric, comprising the following raw materials by weight:

[0040] 160 parts of polycaprolactone granules;

[0041] 40 parts bamboo fiber;

[0042] 1 part alginic acid;

[0043] Seven portions of EGCG@CuCe-MOF composite material;

[0044] Four parts of ZnO modified with KH-550.

[0045] The preparation method of EGCG@CuCe-MOF composite material includes the following steps:

[0046] (1) Add 1 mol copper nitrate, 0.5 mol cerium chloride and 4 mol 2-methylimidazole to 240 mL of ethanol-water, wherein the volume ratio of ethanol to water is 3:1; disperse ultrasonically for 20 min, then react hydrothermally at 100 °C for 10 h, cool to room temperature, filter, wash, and dry at 80 °C for 14 h to obtain CuCe-MOF;

[0047] (2) Add 5g of epigallocatechin gallate (EGCG) and 10g of CuCe-MOF obtained in step (1) to 160mL of deionized water, stir at room temperature for 3h at a stirring speed of 5000rpm, then centrifuge at 9000r / min for 40min to obtain solid, wash, and then vacuum dry at 40℃ for 26h to obtain EGCG@CuCe-MOF composite material.

[0048] The preparation method of KH-550 modified ZnO includes the following steps: 10g of nano zinc oxide and 6g of KH-550 are dispersed in 160mL of deionized water. The nano zinc oxide has a particle size of 50nm. The mixture is then stirred at 40℃ for 10h, cooled to room temperature, filtered, washed, and dried at 80℃ for 14h to obtain KH-550 modified ZnO.

[0049] A method for preparing an antibacterial and skin-friendly fabric, the method comprising the following steps:

[0050] The raw materials are mixed, then fed into a screw extruder for melt extrusion and spinning at a speed of 740 m / min. The resulting fabric is then woven to obtain a fungus-friendly and skin-friendly material.

[0051] Example 2

[0052] An antibacterial and skin-friendly fabric, comprising the following raw materials by weight:

[0053] 240 parts of polycaprolactone granules;

[0054] 20 parts bamboo fiber;

[0055] 2 parts alginic acid;

[0056] Three portions of EGCG@CuCe-MOF composite material;

[0057] 8 parts of ZnO modified with KH-550.

[0058] The preparation method of EGCG@CuCe-MOF composite material includes the following steps:

[0059] (1) Add 1 mol of copper chloride, 1.5 mol of cerium acetate and 6 mol of 2-methylimidazole to 240 mL of ethanol-water, wherein the volume ratio of ethanol to water is 3:1; disperse by ultrasonication for 40 min, then react hydrothermally at 140 °C for 6 h, cool to room temperature, filter, wash, and dry at 100 °C for 10 h to obtain CuCe-MOF;

[0060] (2) Add 15g of epigallocatechin gallate (EGCG) and 10g of CuCe-MOF obtained in step (1) to 160mL of deionized water, stir at room temperature for 5h at a stirring speed of 3000rpm, then centrifuge at 11000r / min for 20min to obtain solid, wash, and then vacuum dry at 80℃ for 18h to obtain EGCG@CuCe-MOF composite material.

[0061] The preparation method of KH-550 modified ZnO includes the following steps: 10g of nano zinc oxide and 8g of KH-550 are dispersed in 160mL of deionized water, wherein the nano zinc oxide has a particle size of 90nm; then the reaction is stirred at 60℃ for 6h, cooled to room temperature, filtered, washed, and dried at 100℃ for 10h to obtain KH-550 modified ZnO.

[0062] The preparation method of an antibacterial and skin-friendly fabric is the same as that of Example 1.

[0063] Example 3

[0064] An antibacterial and skin-friendly fabric, comprising the following raw materials by weight:

[0065] 200 parts of polycaprolactone granules;

[0066] 30 parts bamboo fiber;

[0067] 1.5 parts alginic acid;

[0068] Five samples of EGCG@CuCe-MOF composite material were prepared.

[0069] 6 parts of ZnO modified with KH-550.

[0070] The preparation method of EGCG@CuCe-MOF composite material includes the following steps:

[0071] (1) Add 1 mol copper acetate, 1 mol cerium nitrate and 5 mol 2-methylimidazole to 240 mL of ethanol-water, wherein the volume ratio of ethanol to water is 3:1; disperse ultrasonically for 30 min, then hydrothermally react at 120 °C for 8 h, cool to room temperature, filter, wash and dry at 90 °C for 12 h to obtain CuCe-MOF;

[0072] (2) Add 10g of epigallocatechin gallate (EGCG) and 10g of CuCe-MOF obtained in step (1) to 160mL of deionized water, stir at room temperature for 4h at a stirring speed of 4000rpm, then centrifuge at 10000r / min for 30min to obtain solid, wash, and then vacuum dry at 60℃ for 22h to obtain EGCG@CuCe-MOF composite material.

[0073] The preparation method of KH-550 modified ZnO includes the following steps: 10g of nano zinc oxide and 7g of KH-550 are dispersed in 160mL of deionized water. The nano zinc oxide has a particle size of 70nm. The mixture is then stirred at 50℃ for 8h, cooled to room temperature, filtered, washed, and dried at 90℃ for 12h to obtain KH-550 modified ZnO.

[0074] The preparation method of an antibacterial and skin-friendly fabric is the same as that of Example 1.

[0075] Compare with Example 1

[0076] Comparative Example 1 and Example 3 are identical except for the following differences: EGCG@Cu-MOF composite material is used in place of EGCG@CuCe-MOF composite material, and the preparation method of the EGCG@Cu-MOF composite material includes the following steps:

[0077] (1) Add 2 mol of copper acetate and 5 mol of 2-methylimidazole to 240 mL of ethanol-water, wherein the volume ratio of ethanol to water is 3:1; disperse by ultrasonication for 30 min, then react hydrothermally at 120 °C for 8 h, cool to room temperature, filter, wash, and dry at 90 °C for 12 h to obtain Cu-MOF;

[0078] (2) Add 10g of epigallocatechin gallate (EGCG) and 10g of Cu-MOF obtained in step (1) to 160mL of deionized water, stir at room temperature for 4h at a stirring speed of 4000rpm, then centrifuge at 10000r / min for 30min to obtain solid, wash, and then vacuum dry at 60℃ for 22h to obtain EGCG@Cu-MOF composite material.

[0079] Compare with Example 2

[0080] Comparative Example 2 and Example 3 are identical except for the following: an equal amount of CuCe-MOF composite material is used instead of EGCG@CuCe-MOF composite material. The preparation method of CuCe-MOF includes the following steps:

[0081] 1 mol of copper acetate, 1 mol of cerium nitrate and 5 mol of 2-methylimidazole were added to 240 mL of ethanol-water, with a volume ratio of ethanol to water of 3:1; the mixture was ultrasonically dispersed for 30 min, and then hydrothermally reacted at 120 °C for 8 h. After cooling to room temperature, the mixture was filtered, washed and dried at 90 °C for 12 h to obtain CuCe-MOF.

[0082] Compare with Example 3

[0083] Comparative Example 3 and Example 3 are completely identical except for the difference that an equal amount of nano zinc oxide is used to replace the KH-550 modified ZnO.

[0084] Compare with Example 4

[0085] Comparative Example 4 and Example 3 are completely identical except for the difference in that an equal amount of KH-550 modified ZnO is used to replace the EGCG@CuCe-MOF composite material.

[0086] The performance of Examples 1-3 and Control Examples 1-4 was tested, and the specific test results are shown in Table 1. The antibacterial performance test standards are as follows:

[0087] The antibacterial effect of the fabric was tested with reference to the national standard GB / T20944.3-2008 after 0 and 100 washes.

[0088] Table 1

[0089]

[0090] The test results in Table 1 show that the antibacterial and skin-friendly fabric prepared by this invention has excellent antibacterial properties, and the fabric can maintain its excellent antibacterial properties even after multiple washes. By comparing Example 4 with Comparative Examples 1-4, combining EGCG and CuCe-MOF effectively utilizes the advantages of both to achieve synergistic antibacterial effects. Zinc oxide has antibacterial properties; modifying zinc oxide with KH-550 improves its dispersibility in the fabric. Furthermore, KH-550 contains amine groups, which also enhance the antibacterial effect, thus improving the fabric's antibacterial properties. KH-550 also prevents zinc oxide from being shed after multiple washes, thus ensuring the fabric's long-lasting antibacterial properties.

[0091] The mechanical properties of the fabrics prepared in Examples 1-3 and Control Examples 3-4 were tested. The specific test results are shown in Table 2. The standard for radial tensile strength is as follows:

[0092] The test was conducted in accordance with GB / T 3917.2-2009.

[0093] Table 2

[0094]

[0095] As can be seen from the test results in Table 2, the fabric provided by this invention has good radial tensile strength, excellent mechanical properties, and good application prospects.

[0096] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. An antibacterial skin-friendly fabric, characterized in that: By weight parts, including the following raw materials: Poly (caprolactone) particles 160-240 parts; Bamboo fiber 20-40 parts; Alginic acid 1-2 parts; EGCG@CuCe-MOF composite 3-7 parts; KH-550 modified ZnO 4-8 parts.

2. The antibacterial skin-friendly fabric according to claim 1, characterized in that: The preparation method of the EGCG@CuCe-MOF composite includes the following steps: (1) Add copper salt, cerium salt and 2-methyl imidazole to ethanol water, ultrasonic dispersion, then hydrothermal reaction, cool to room temperature, filter, wash, dry, get CuCe-MOF; (2) Add epigallocatechin gallate (EGCG) and CuCe-MOF obtained in step (1) to deionized water, stir at room temperature, centrifuge, get solid, wash, vacuum drying, get EGCG@CuCe-MOF composite.

3. The antibacterial skin-friendly fabric according to claim 2, characterized in that: In step (1), the copper salt is one of copper nitrate, copper chloride and copper acetate; the cerium salt is one of cerium nitrate, cerium chloride and cerium acetate; the molar ratio of the copper salt, cerium salt and 2-methyl imidazole is 1:0.5~1.5:4~6.

4. The antibacterial skin-friendly fabric according to claim 2 or 3, characterized in that: In step (1), the volume ratio of ethanol and water is 3:1; the ultrasonic dispersion time is 20~40min; the hydrothermal reaction condition is hydrothermal reaction at 100~140℃ for 6~10h; the drying is at 80~100℃ for 10~14h.

5. The antibacterial skin-friendly fabric according to claim 2, characterized in that: In step (2), the mass ratio of EGCG to CuCe-MOF obtained in step (1) is 0.5~1.5:1; the stirring time at room temperature is 3~5h, and the stirring speed is 3000~5000rpm.

6. The antibacterial skin-friendly fabric according to claim 2 or 5, characterized in that: In step (2), the centrifugation condition is centrifugation at 9000~11000r / min for 20~40min; the vacuum drying is at 40~80℃ for 18~26h.

7. The antibacterial skin-friendly fabric according to claim 1, characterized in that: The preparation method of the KH-550 modified ZnO includes the following steps: disperse nano zinc oxide and KH-550 into deionized water, stir and react, cool to room temperature, filter, wash, dry at 80~100℃ for 10~14h, get KH-550 modified ZnO.

8. The antibacterial skin-friendly fabric according to claim 7, characterized in that: The particle size of the nano zinc oxide is 50~90nm, and the mass ratio of the nano zinc oxide to KH-550 is 1:0.6~0.

8.

9. The antibacterial skin-friendly fabric according to claim 8, characterized in that: The stirring reaction condition is stirring reaction at 40~60℃ for 6~10h; the drying is at 80~100℃ for 10~14h.

10. A process for the preparation of an antibacterial skin-friendly fabric according to any one of claims 1 to 9, characterized in that: The preparation method includes the following steps: Mix the raw materials, then put the above raw material mixture into a screw extruder for melt extrusion and spinning treatment at a speed of 720~760m / min, then weave, get bacteria skin fabric.

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