Textile photoactivated conjugated antimicrobial finish material, method of making and use thereof

Abstract

The present application relates to the field of fabric antibacterial material, in particular to a fabric photo-activated coupling antibacterial finishing agent material and a preparation method and application thereof. The fabric photo-activated coupling antibacterial finishing agent is used for fabric antibacterial finishing, and no other reagent is needed in the finishing process, the reaction condition is mild, the energy consumption is low, the branched polyamino acid antibacterial material can be finished on the surface of the fabric through ultraviolet light irradiation, excellent and durable antibacterial performance is given to the fabric, only N2 by-product is produced in the reaction process, and the environment is friendly. In addition, the photo-activated coupling reaction rate is fast, the efficiency is high, the process is easy to control, and the requirement for the processing equipment is not high. The fabric photo-activated coupling antibacterial finishing agent can be applied to the fabric through impregnation or spraying, and then subjected to light treatment, is suitable for efficient and rapid large-scale antibacterial finishing application of the fabric, is easy to integrate into the existing production process of the fabric, and is beneficial to actual transformation application.

Description

Technical Field

[0001] This invention relates to the field of antibacterial materials for fabrics, specifically to photoactivated coupling antibacterial finishing agents for fabrics, their preparation methods, and applications. Background Technology

[0002] Textile products, in various forms such as clothing and home textiles, are closely present in people's daily lives, serving as everyday necessities. However, the gaps between the warp and weft yarns and fibers of fabrics provide a convenient environment for bacteria, fungi, and other microorganisms to attach and colonize their surfaces. Although daily washing can remove these attached microorganisms to some extent, current washing methods (such as water-saving, energy-saving, and active enzyme detergents) make it difficult to effectively remove microorganisms from the fabric surface, resulting in the undesirable consequence of microbial residue. Especially when microorganisms colonize and form biofilms on the fabric surface, conventional washing methods alone are insufficient to completely remove them. This makes fabrics one of the main mediums for the spread of pathogens; microorganisms are transferred and cross-contaminated with fabrics, increasing the risk of infection and jeopardizing health and safety.

[0003] Antimicrobial finishing of fabrics imparts antibacterial and even bactericidal properties, effectively inhibiting the attachment and reproduction of microorganisms on the fabric, preventing the spread of microorganisms through the fabric, protecting users from or minimizing microbial harm, and improving the wearing environment. Currently, commercially available auxiliaries for antimicrobial finishing of fabrics include inorganic (such as metal salts or oxides of silver, zinc, and copper), organic (such as quaternary ammonium salts, biguanides, halogenated amines, and triclosan), and natural (such as chitosan, flavonoids, and antimicrobial peptides) antimicrobial agents. However, antimicrobial fabrics prepared using these antimicrobial agents are mostly leaching-type antimicrobial fabrics, relying mainly on the antimicrobial components released free from the fabric to exert their antimicrobial effect. This results in drawbacks such as easily inducing drug resistance, poor wash resistance, and environmental pollution. In contrast, antimicrobial fabrics made by bonding antimicrobial agents to the fabric surface do not leach out the antimicrobial agents, exhibit better wash resistance, and primarily rely on physical membrane disruption through electrostatic attraction to exert their antimicrobial effect. In comparison, these non-leaching antimicrobial fabrics are safer for both users and the environment. However, among commercially available antimicrobial finishing agents, only one type of organosilicon quaternary ammonium salt compound can be used to prepare non-leaching antimicrobial fabrics. These agents are mainly imported, and the finished fabric surface tends to become hydrophobic, affecting comfort. Therefore, developing novel antimicrobial finishing agents suitable for preparing non-leaching antimicrobial fabrics has extremely important economic value and practical significance.

[0004] The preparation of non-leaching antibacterial fabrics places high demands on both the fabric and the antibacterial agent. Not only must both possess active groups capable of specific reactive bonding, but the antibacterial agent itself must also contain a large number of cationic antibacterial groups to ensure efficient bonding reactions and good antibacterial activity. For fabrics, apart from pure cotton, silk, and wool, most other fabric materials (polyester, nylon, spandex, and polypropylene, etc.) lack or are deficient in groups suitable for coupling reactions, requiring additional activation pretreatment to acquire active sites for coupling reactions. For example, polyester fabrics undergo alkaline treatment to partially hydrolyze ester bonds to obtain hydroxyl groups suitable for coupling, while nylon fabrics undergo acid treatment to hydrolyze amide bonds to obtain amino groups for grafting. However, acid / alkali treatments can damage the mechanical strength and properties of fabric materials, thus limiting the application of such methods. Furthermore, there is a lack of universal antibacterial finishing agents and finishing processes for fabrics of different materials. It is often necessary to design and develop antibacterial finishing agents with specific structures and unique finishing processes. For example, developing reactive antibacterial finishing agents containing silane or isocyanate groups to perform antibacterial finishing on pure cotton fabrics, or using enzyme catalysis to graft ε-polylysine (ε-PL) onto the surface of wool fabrics, etc. Summary of the Invention

[0005] In view of this, the technical problem to be solved by the present invention is to provide a universal reactive fabric photoactivated coupling antibacterial finishing agent material, its preparation method and application. The fabric photoactivated coupling antibacterial finishing agent material provided by the present invention can be non-specifically coupled with various fabrics of different materials after photoactivation. At the same time, some intermolecular crosslinks form an insoluble branched polyamino acid coating on the fabric surface. The prepared antibacterial fabric has no risk of antibacterial agent leaching, has broad-spectrum antibacterial properties and high wash resistance antibacterial performance.

[0006] This invention provides a reactive fabric photoactivated coupling antibacterial finishing agent material, which is obtained by reacting branched polyamino acids with compounds containing photoactivated coupling groups;

[0007] The branched polyamino acids of this invention are obtained by amino acid polymerization, specifically by homopolymerization of one amino acid or copolymerization of two or more amino acids. The polymerization temperature is 130℃~200℃, and the polymerization time is 3h~24h. In some embodiments of this invention, the branched polyamino acids are obtained by homopolymerization of a first amino acid; or, the branched polyamino acids are obtained by copolymerization of a first amino acid and a second amino acid; the first amino acid is selected from lysine, ornithine, arginine, and histidine; the second amino acid is selected from one or more of asparagine, glutamine, tryptophan, aspartic acid, cysteine, phenylalanine, proline, citrulline, and methionine. The number-average molecular weight (Mn) of the branched polyamino acids of this invention is 1000g / mol~20000g / mol; the PDI of the branched polyamino acids is 1.3~2.6.

[0008] The compound containing a photoactivated coupling group described in this invention, also known as a phenyl azide compound, is composed of a reactive group and a photoactivated coupling group; the reactive group can bond with the amino group on the branched polyamino acid, specifically, the reactive group forms a covalent bond with the amino group on the branched polyamino acid. In some embodiments of this invention, the reactive group forms an amide bond with the amino group on the branched polyamino acid.

[0009] The photoactivated coupling group is selected from substituted phenyl azide groups or unsubstituted phenyl azide groups; the substituent group on the substituted phenyl azide group is a halogen group, hydroxyl group, nitro group, C1-C4 alkoxy group, sulfonyl group, or C1-C4 alkyl group; specifically, the substituent group on the substituted phenyl azide group is F, Cl, Br, I, hydroxyl group, nitro group, methoxy group, sulfonyl group, or methyl group. More specifically, the photoactivated coupling group has a structure of formula 1-14;

[0010]

[0011] in, This represents the substitution site of the reactive group.

[0012] In some embodiments of the present invention, the compound containing the photoactivated coupling group is selected from one or more of 4-azido-2,3,5,6-tetrafluorobenzoic acid, succinimide-4-azidobenzoic acid ester, N-hydroxysulfosuccinimide-4-azidobenzoic acid ester, 5-azido-2-nitrobenzoic acid-N-succinimide ester, 4-(P-azidosalicylic acid)-butylamine, 1-azido-4-bromobenzene, p-azidophenylglyoxal monohydrate, 6-[(4-azido-2-nitrophenyl)amino]hexanoic acid sulfonate succinimide ester, 3-(4-azidophenyl)propionic acid, 4-(4-azidophenyl)butyric acid, and methyl 2-azido-4,5-dimethoxybenzoate.

[0013] The fabric photoactivated coupling antibacterial finishing agent material provided by this invention is obtained by appropriately replacing the phenyl azide functional group containing photoactivated coupling function in a branched polyamino acid antibacterial material. Specifically, the terminal amino group in the structure of the branched polyamino acid forms a bond with the reactive group in the structure of the photoactivated coupling compound, thereby allowing the photoactivated coupling group in the compound structure containing the photoactivated coupling group to react and bond with the branched polyamino acid through a covalent bond to obtain the fabric photoactivated coupling antibacterial finishing agent material. The degree of substitution of the photoactivated coupling group in the fabric photoactivated coupling antibacterial finishing agent material of this invention is 1% to 10%, and the antibacterial performance of the branched polyamino acid is not affected by the substitution of the photoactivated coupling group. A schematic diagram of the structure of the fabric photoactivated coupling antibacterial finishing agent material provided by this invention is shown below. Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of the fabric photoactivated coupling antibacterial finishing agent material described in this invention.

[0014] The present invention also provides a method for preparing the fabric photoactivated coupling antibacterial finishing agent material according to any of the above technical solutions, comprising the following steps:

[0015] Branched polyamino acids and compounds containing photoactivated coupling groups are reacted to obtain a fabric photoactivated coupling antibacterial finishing agent material.

[0016] Specifically, a branched polyamino acid solution and a compound solution containing photoactivated coupling groups are reacted. The branched polyamino acid solution is obtained by mixing the branched polyamino acid and water. The compound solution containing the photoactivated coupling groups is obtained by mixing the compound containing the photoactivated coupling groups and an organic solvent. The organic solvent is not particularly limited, as long as it can dissolve the compound containing the photoactivated coupling groups and is miscible with water. The reaction is carried out at room temperature in the dark for 20-30 hours, preferably 24 hours. In some embodiments of the present invention, the room temperature is 20-30°C. After the reaction, the product is purified by dialysis to obtain a retention solution, which is then concentrated and freeze-dried to obtain the fabric photoactivated coupling antibacterial finishing agent material. The branched polyamino acid and the photoactivated coupling compound in the present invention are the same as described above and will not be repeated.

[0017] This invention also provides a fabric photoactivated coupling antibacterial finishing agent. The fabric photoactivated coupling antibacterial finishing agent provided by this invention can be used alone as the fabric photoactivated coupling antibacterial finishing agent material described in any of the above technical solutions, or it can be obtained by combining the fabric photoactivated coupling antibacterial finishing agent material described in any of the above technical solutions with additives. The additives are not particularly limited and can be commonly used additives in the art. The fabric photoactivated coupling antibacterial finishing agent of this invention is applicable to natural fiber fabrics, man-made fiber fabrics, synthetic fiber fabrics, or blended fabrics composed of these fibers; the natural fiber fabrics are pure cotton fabrics, silk fabrics, wool fabrics, or linen fabrics; the man-made fiber fabrics are viscose fiber, acetate fiber, or cuprammonium fiber; the synthetic fiber fabrics are polyester, nylon, acrylic fiber, vinylon, polypropylene, chlorofiber, or spandex; the blended fiber fabrics are wool-viscose blends, polyester-viscose blends, nylon-cotton blends, or polyester-cotton blends.

[0018] The fabric photoactivated coupling antibacterial finishing agent of this invention belongs to the category of reactive antibacterial finishing agents for fabrics. It is a branched polyamino acid derivative containing a photoactivated coupling group. The photoactivated coupling group is used for photoactivation and coupling with the fabric. After ultraviolet light irradiation, the azide group on the benzene ring forms a highly active nitrobenzene intermediate, which can non-specifically insert into the CH or nucleophilic XH bonds (X = O, N, S) adjacent to the fabric surface to form a coupling. At the same time, a small amount of intermolecular crosslinking forms an insoluble branched polyamino acid coating on the fabric surface. The large number of OH, NH and other nucleophilic groups present on the surfaces of different fabrics provide sufficient photoactive coupling reaction sites, which is conducive to the coupling reaction. Thus, the branched polyamino acid antibacterial material can be bonded to the fabric surface to prepare a non-leaching antibacterial fabric, achieving antibacterial finishing of the fabric. The fabric photoactivated coupling antibacterial finishing agent of this invention can non-specifically couple with a variety of fabrics. The resulting antibacterial fabric has no risk of antibacterial agent leaching, has broad-spectrum antibacterial properties and high wash resistance, thus exerting a highly efficient and long-lasting antibacterial effect.

[0019] This invention also provides a non-leaching antibacterial fabric, which is obtained by combining a fabric with a fabric photoactivated coupling antibacterial finishing agent as described in any of the above technical solutions. The fabric of this invention includes natural fiber fabrics, man-made fiber fabrics, synthetic fiber fabrics, or blended fabrics composed of these fibers; the natural fiber fabric is pure cotton fabric, silk fabric, wool fabric, or linen fabric; the man-made fiber fabric is viscose fiber, acetate fiber, or cuprammonium fiber; the synthetic fiber fabric is polyester, nylon, acrylic fiber, vinylon, polypropylene, chlorofiber, or spandex; the blended fiber fabric is a wool-viscose blend, a polyester-viscose blend, a nylon-cotton blend, or a polyester-cotton blend.

[0020] This invention also provides a method for preparing the above-mentioned non-leaching antibacterial fabric. The non-leaching antibacterial fabric of this invention is obtained by a padding-light treatment process, specifically including the following steps: immersing the fabric in the fabric photoactivated coupling antibacterial finishing agent described in any of the above technical solutions, and then subjecting the immersed fabric to light treatment to obtain the non-leaching antibacterial fabric. In some embodiments of this invention, the fabric is obtained by immersing it in a fabric photoactivated coupling antibacterial finishing agent solution with a mass concentration of 1% to 10%, followed by light treatment, and then washing and air drying. The immersion temperature of this invention is room temperature to 120°C, preferably 50°C to 70°C, more preferably 60°C; the immersion time is 0.5h to 6h, preferably 1h to 2h; the bath ratio of the immersion is (1 to 20):1, preferably (9 to 11):1, and more preferably 10:1. The light treatment described in this invention is ultraviolet light treatment, and the light treatment time is 30s to 30min, preferably 1min to 25min, more preferably 3min to 15min, and even more preferably 10min; the light treatment power is 15mW / cm². 2 ~25mW / cm 2 The preferred value is 20mW / cm 2 .

[0021] This invention provides a fabric photoactivated coupling antibacterial finishing agent, its preparation method, and its application. Using the fabric photoactivated coupling antibacterial finishing agent of this invention to finish fabrics requires no other reagents, the reaction conditions are mild, and energy consumption is low. Branched polyamino acid antibacterial materials can be applied to the fabric surface through ultraviolet light-induced coupling, imparting excellent and long-lasting antibacterial properties to the fabric. Long-term use is unlikely to induce drug resistance, resulting in high safety. The reaction process only produces N2 byproducts, making it environmentally friendly. Furthermore, this photoactivated coupling reaction is fast, efficient, and easy to control, with low requirements for processing equipment. This reactive fabric photoactivated coupling antibacterial finishing agent can be applied to fabrics through impregnation or spraying, followed by light treatment. It is suitable for efficient, rapid, and large-scale antibacterial finishing of fabrics and is easily integrated into existing fabric production processes, facilitating practical application. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the fabric photoactivated coupling antibacterial finishing agent described in this invention;

[0023] Figure 2 These are agar plate photographs showing the dissolution of antimicrobial agents in antimicrobial fabrics 1, 2, and 3 prepared by photoactivated coupling antimicrobial finishing agents in Example 7. Detailed Implementation

[0024] This invention discloses a photoactivated coupling antibacterial finishing agent for fabrics, its preparation method, and its application. Those skilled in the art can refer to the content of this document and appropriately modify the process parameters to achieve the desired results. It should be particularly noted that all similar substitutions and modifications are obvious to those skilled in the art and are considered to be included in this invention. The methods and applications of this invention have been described through preferred embodiments, and those skilled in the art can clearly modify or appropriately change and combine the methods and applications described herein without departing from the content, spirit, and scope of this invention to realize and apply the technology of this invention.

[0025] The present invention will be further described below with reference to the embodiments:

[0026] Example 1

[0027] Synthesis of homopolymeric branched polyamino acid 1: 50g of lysine hydrochloride as raw material and 10g of sodium hydroxide catalyst were added to a 250mL single-necked flask, a water separator was connected, nitrogen was used for purging, and the reaction was stirred and heated at 180℃ for 6h under a nitrogen atmosphere. After cooling to room temperature, the product was dissolved in ethanol and precipitated with diethyl ether. After drying, 39.7g of pale yellow solid hyperbranched polylysine was obtained. GPC characterization: Mn = 4800g / mol, PDI = 2.32.

[0028] The preparation methods for homopolymer branched polyamino acids 2-4 are basically the same as above. The specific synthesis conditions and molecular weight characterization are shown in Table 1 (the synthesis conditions and molecular weight characterization of the homopolymer branched polyamino acid 1 are also recorded therein). If a solvent is required, it should be added to a 250 mL single-necked flask along with the raw materials and catalyst at the beginning.

[0029] Table 1

[0030]

[0031] Example 2

[0032] Synthesis of copolymerized branched polyamino acid 5: 20g of lysine and 5g of tryptophan were added to a 100mL single-necked flask, a water separator was connected, nitrogen was used for purging three times, and the reaction was carried out at 180℃ under nitrogen atmosphere with stirring and heating for 6h. After cooling to room temperature, the product was dissolved in ethanol and precipitated with diethyl ether. After drying, 18.5g of light yellow solid branched lysine-tryptophan copolymer was obtained. GPC characterization: Mn = 4500g / mol, PDI = 1.86.

[0033] The preparation methods for copolymerized branched polyamino acids 6-13 are basically the same as above. The raw materials are added once or in multiple batches. The specific synthesis conditions and molecular weight characterization are shown in Table 2 (the synthesis conditions and molecular weight characterization of the above-mentioned copolymerized branched polyamino acid 5 are also recorded therein). If a catalyst and solvent are required, they are added together with the raw materials to a 100 mL single-necked flask at the beginning.

[0034] Table 2

[0035]

[0036] Example 3

[0037] Synthesis of branched polyamino acid-phenyl azido derivative 1: 1.45 g of 4-azido-2,3,5,6-tetrafluorobenzoic acid was dissolved in N,N-dimethylformamide, followed by the addition of 0.86 g of N-hydroxysuccinimide and 1.42 g of 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride. Then, an aqueous solution of hyperbranched polylysine (i.e., homopolymerized branched polyamino acid 1, 20 g / 100 mL) was slowly added dropwise to the reaction system. The reaction was stirred at room temperature in the dark. After 24 h, the mixture was concentrated and purified by dialysis. The retentate was lyophilized to obtain a branched polylysine-tetrafluorophenyl azido compound with a degree of substitution of 5% for 4-azido-2,3,5,6-tetrafluorobenzoic acid.

[0038] Example 4:

[0039] Synthesis of branched polyamino acid-phenyl azido derivative 2: Succinimidyl 4-azidobenzoate (1.17 g) was dissolved in dimethyl sulfoxide, hyperbranched polyornithine (i.e., homopolymerized branched polyamino acid 4, 20 g), and potassium carbonate (2 g) in water. The former was then slowly added dropwise to the latter solution. The reaction was carried out at room temperature in the dark with stirring. After 24 h, the mixture was concentrated and purified by dialyzing. The retained solution was freeze-dried to obtain a branched polyornithine-phenyl azido compound with a degree of substitution of 1% for 4-azidobenzoic acid.

[0040] Example 5:

[0041] Synthesis of branched polyamino acid-phenyl azido derivative 3: N-hydroxysulfosuccinimide-4-azidobenzoate (2.55 g), branched polylysine / ornithine copolymer (i.e., copolymerized branched polyamino acid 9, 20 g), and potassium carbonate (2 g) were dissolved in water and reacted with stirring at room temperature in the dark. After 24 h, the mixture was concentrated and purified by dialyzing. The retentate was freeze-dried to obtain a branched polylysine / ornithine copolymer-phenyl azido compound with a degree of 4-azidobenzoic acid substitution of 3%.

[0042] Example 6:

[0043] Synthesis of branched polyamino acid-phenyl azide derivative 4: 1 g of succinic anhydride was dissolved in 20 mL of anhydrous dichloromethane. 206 mg of N,N'-dicyclohexylcarbodiimide and 122 mg of 4-dimethylaminopyridine (DMAP) were added. Under ice-water bath conditions, a 0.249 g / 20 mL solution of 4-(P-azidosalicylic acid amino)-butylamine dichloromethane was slowly added dropwise to the reaction system. The mixture was stirred and allowed to return to room temperature naturally. The reaction was carried out in the dark for 48 h. After washing with saturated brine and drying with anhydrous magnesium sulfate, the product was purified by silica gel column chromatography.

[0044] The above product was dissolved in N,N-dimethylformamide, and then N-hydroxysuccinimide (1.72 g) and 1-ethyl-(3-dimethylaminopropyl)carbodiimide hydrochloride (2.84 g) were added. Then, a hyperbranched polylysine / arginine aqueous solution (i.e., copolymerized branched polyamino acid 8, 20 g / 100 mL) was slowly added dropwise to the reaction system. The reaction was stirred at room temperature in the dark. After 24 h, the mixture was concentrated and purified by dialyzing. The retentate was freeze-dried to obtain a branched polylysine / arginine-phenyl azide compound with a degree of substitution of 10% for 4-azido-2,3,5,6-tetrafluorophenyl.

[0045] Example 7

[0046] Preparation of photoactivated antibacterial finished fabric: At room temperature, pure cotton fabric was immersed in a 5 wt% solution of branched polylysine-tetrafluorophenyl azide obtained in Example 3, and treated at 60°C for 1 hour with a bath ratio of 10:1. Then, it was treated with ultraviolet light for 10 minutes at an ultraviolet power of 20 mW / cm². 2 The antibacterial fabric 1 was obtained by washing and air drying.

[0047] The preparation methods for the remaining photoactivated antibacterial finished fabrics are basically the same as above, and the specific conditions are shown in Table 3 (the conditions for the above-mentioned antibacterial fabric 1 are also recorded therein):

[0048] Table 3

[0049]

[0050]

[0051] Comparative Example 1

[0052] At room temperature, pure cotton fabric was immersed in a 5 wt% branched polylysine-tetrafluorophenyl azide compound solution at 60°C for 1 hour with a bath ratio of 10:1. The resulting fabric was then washed and air-dried as Comparative Example 1.

[0053] Comparative Example 2

[0054] At room temperature, pure cotton fabric was immersed in water at 60°C for 1 hour with a liquor ratio of 10:1, followed by ultraviolet (UV) irradiation for 10 minutes at a UV power of 20 mW / cm². 2 The fabric obtained by washing and air drying was used as Comparative Example 2.

[0055] Experimental Example 1

[0056] The antibacterial fabrics 1-10 prepared by photoactivated coupling antibacterial finishing agent in Example 7 above, as well as the fabrics prepared by Comparative Examples 1 and 2, were evaluated for their antibacterial properties according to the requirements of the textile industry standard FZ / T 73023-2006 for antibacterial knitted fabrics. Untreated pure cotton fabric was selected as a blank control sample. All fabrics were autoclaved before testing. The antibacterial properties of all antibacterial fabrics were tested after 10, 20, and 50 washes to evaluate their wash resistance and antibacterial properties. The experimental test strains were *Escherichia coli* (ATCC 8739), *Staphylococcus aureus* (ATCC 25923), and *Candida albicans* (ATCC 10231). The antibacterial rate test results are shown in Table 4.

[0057] Table 4

[0058]

[0059]

[0060] Experimental Example 2

[0061] The dissolution behavior of the antibacterial agent in antibacterial fabrics 1, 2, and 3 prepared with photoactivated coupling antibacterial finishing agents in Example 7 above was evaluated using the halo method listed in the textile industry standard FZ / T 73023-2006 for antibacterial knitted fabrics after one wash. Test results for different strains are as follows: Figure 2 As shown, Figure 2 These are agar plate photographs showing the dissolution of antimicrobial agents in antimicrobial fabrics 1, 2, and 3 prepared by photoactivated coupling antimicrobial finishing agents in Example 7.

[0062] Antibacterial tests on the above cases show that the photoactivated coupling antibacterial finishing agent synthesized by the preparation method of this invention is suitable for photoactivated coupling antibacterial finishing of fabrics of different materials, and the pad-injection-ultraviolet light activation coupling finishing process is also universally applicable; the resulting antibacterial fabric shows no leaching of the antibacterial agent, making it a non-leaching antibacterial fabric; the coupled-linked antibacterial agent achieves an antibacterial rate of over 99% against tested Escherichia coli, Staphylococcus aureus, and Candida albicans, and the antibacterial fabric maintains an antibacterial performance of AAA level after multiple washing cycles. The photoactivated coupling antibacterial finishing agent obtained by this invention is a reactive fabric photoactivated coupling antibacterial finishing agent, and the resulting antibacterial fabric is a non-leaching antibacterial fabric, achieving the purpose of highly efficient and long-lasting antibacterial action.

[0063] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A fabric photoactivated coupling antibacterial finishing agent material, characterized in that, It is obtained by reacting branched polyamino acids with compounds containing photoactivated coupling groups; The branched polyamino acid is obtained by amino acid polymerization; The compound containing the photoactivated coupling group is composed of a reactive group and a photoactivated coupling group; The reactive group forms a covalent bond with the amino group on the branched polyamino acid; The degree of substitution of the photoactivated coupling group on the branched polyamino acid is 1% to 10%; The compound containing the photoactivated coupling group is selected from one or more of 4-azido-2,3,5,6-tetrafluorobenzoic acid, succinimide-4-azidobenzoic acid ester, N-hydroxysulfosuccinimide-4-azidobenzoic acid ester, and 4-(P-azidosalicylic acid)-butylamine.

2. The fabric photoactivated coupling antibacterial finishing agent material according to claim 1, characterized in that, The branched polyamino acids have a number-average molecular weight of 1000 g / mol to 20000 g / mol and a PDI of 1.3 to 2.

6.

3. The fabric photoactivated coupling antibacterial finishing agent material according to claim 1, characterized in that, The branched polyamino acid is obtained by homopolymerization of the first amino acid; or, the branched polyamino acid is obtained by copolymerization of the first amino acid and the second amino acid. The first amino acid is selected from one of lysine, ornithine, arginine, and histidine; The second amino acid is selected from one or more of asparagine, glutamine, tryptophan, aspartic acid, cysteine, phenylalanine, proline, citrulline, and methionine.

4. The method for preparing the fabric photoactivated coupling antibacterial finishing agent material according to any one of claims 1 to 3, characterized in that, Includes the following steps: Branched polyamino acids and compounds containing photoactivated coupling groups are reacted to obtain a fabric photoactivated coupling antibacterial finishing agent material.

5. A fabric photoactivated coupling antibacterial finishing agent, characterized in that, It is the fabric photoactivated coupling antibacterial finishing agent material according to any one of claims 1 to 3; or, it is obtained from additives and the fabric photoactivated coupling antibacterial finishing agent material according to any one of claims 1 to 3.

6. A non-leaching antibacterial fabric, characterized in that, It is obtained from fabric and the fabric photoactivated coupling antibacterial finishing agent as described in claim 5.

7. A method for preparing non-leaching antibacterial fabrics, characterized in that, Includes the following steps: The fabric is immersed in the fabric photoactivated coupling antibacterial finishing agent as described in claim 5, and then the immersed fabric is treated with ultraviolet light to obtain a non-leaching antibacterial fabric.

Images