Fabric photoactivation coupling antibacterial finishing agent material as well as preparation method and application thereof

Abstract

The invention relates to the field of fabric antibacterial materials, in particular to a fabric photoactivation coupling antibacterial finishing agent material as well as a preparation method and application thereof. When the light-activated coupling antibacterial finishing agent for the fabric is used for antibacterial finishing of the fabric, other reagents are not needed in the finishing process, the reaction condition is mild, the energy consumption is low, a branched polyamino acid antibacterial material can be finished on the surface of the fabric through ultraviolet irradiation, the fabric is endowed with excellent and lasting antibacterial performance, only N2 by-products are generated in the reaction process, and the antibacterial finishing agent is environment-friendly. The method is environment-friendly. In addition, the photoactivation coupling reaction is high in speed and efficiency, the process is easy to control, and the requirement for processing equipment is not high. The fabric photo-activation coupling antibacterial finishing agent can be used for construction of fabrics in a dipping or spraying manner, and then is subjected to light treatment, so that the fabric photo-activation coupling antibacterial finishing agent is suitable for efficient, rapid and large-scale antibacterial finishing application of the fabrics, is also easy to be integrated into the existing production process of the fabrics, and is beneficial to actual conversion and application.

Description

Technical Field

[0001] The invention relates to the field of fabric antibacterial materials, in particular to a fabric light-activated coupled antibacterial finishing agent material and a preparation method and application thereof. Background Art

[0002] Fabric products are closely present in people's daily lives in various forms such as clothing and home textiles. They are used as daily necessities and are in daily contact with people day and night. However, the gaps between the warp and weft yarns and between the fibers of the fabric provide convenience for microorganisms such as bacteria and fungi to attach and colonize on their surfaces. Although daily washing can remove these attached microorganisms to a certain extent, the current washing methods (such as water saving, energy saving and active enzyme detergents, etc.) also make it difficult to effectively remove the microorganisms attached to the surface of the fabric, and there are adverse consequences of microbial residues. In particular, when microorganisms colonize on the surface of the fabric to form a biofilm, it is even more difficult to completely remove these microorganisms by conventional washing methods alone. This makes fabrics one of the main media for the spread of pathogens. Microorganisms are transferred and cross-contaminated with fabrics, increasing the risk of infection for people and is not conducive to health and safety.

[0003] Antibacterial finishing of fabrics can give them antibacterial and even bactericidal properties, which can effectively inhibit the attachment and reproduction of microorganisms on fabrics, prevent the spread of microorganisms through fabrics, protect users from or less harmed by microorganisms, and improve the wearing environment of fabrics. At present, the auxiliaries suitable for antibacterial finishing of fabrics on the market include inorganic (such as metal salts or oxides such as silver, zinc, and copper), organic (such as quaternary ammonium salts, biguanides, halamines, and triclosan, etc.) and natural (such as chitosan, flavonoids, and antimicrobial peptides, etc.) antibacterial agents. However, the antibacterial fabrics prepared by finishing with these antibacterial agents are mostly dissolution-type antibacterial fabrics, which mainly rely on the antibacterial components released from the fabric to exert their antibacterial properties, and have the disadvantages of being easy to induce drug resistance, poor washing resistance and antibacterial properties, and polluting the ecological environment. The antibacterial fabrics prepared by bonding the antibacterial agent to the surface of the fabric have no dissolution of the antibacterial agent, better washing resistance and antibacterial properties, and mainly rely on the physical membrane breaking of the charge to exert antibacterial effects. In contrast, this type of non-dissolving antibacterial fabric is also safer for the user and the ecological environment. However, among the commercialized antibacterial finishing agents for fabrics, only one type of organosilicon quaternary ammonium salt compounds can be used to prepare non-dissolving antibacterial fabrics, but this type of antibacterial agent mainly relies on imports, and the surface of the finished fabric tends to become hydrophobic, affecting comfort. Therefore, the development of a new antibacterial finishing agent suitable for the preparation of non-dissolving antibacterial fabrics has extremely important economic value and practical significance.

[0004] The preparation of non-dissolving antibacterial fabrics has high requirements for both fabrics and antibacterial agents. Not only do both fabrics and antibacterial agents need to have active groups that can react and bind specifically, but the antibacterial agent itself also needs to carry a large number of cationic antibacterial groups to ensure the occurrence of efficient bonding reactions and good antibacterial effects. For fabrics, except for pure cotton, silk and wool fabrics, most of the other fabric materials (polyester, nylon, spandex and polypropylene, etc.) themselves lack or lack groups that can be used for coupling reactions, and they need to be subjected to additional activation pretreatment to make them have active sites available for coupling reactions. For example, polyester fabrics are treated with alkaline solutions to promote partial hydrolysis of ester bonds to obtain hydroxyl groups available for coupling, and nylon fabrics are treated with acid solutions to promote hydrolysis of amide bonds to obtain amino groups for grafting. However, acid / base treatment has certain damage to the mechanical strength and properties of fabric materials, so the application scenarios of such methods are also very limited. In addition, 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 for antibacterial finishing of pure cotton fabrics, or using enzyme-catalyzed methods 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 coupled antibacterial finishing agent material and a preparation method and application thereof. The fabric photoactivated coupled antibacterial finishing agent material provided by the present invention can be non-specifically coupled with fabrics of various different materials after light activation, and at the same time, partial intermolecular cross-linking is performed on the fabric surface to generate an insoluble branched polyamino acid coating. The prepared antibacterial fabric has no risk of antibacterial agent dissolution, has a broad-spectrum antibacterial property, and has high washing resistance and antibacterial performance.

[0006] The present invention provides a reactive fabric light-activated coupled antibacterial finishing agent material, which is obtained by reacting a branched polyamino acid with a compound containing a light-activated coupling group;

[0007] The branched polyamino acid of the present invention is obtained by amino acid polymerization, specifically, by homopolymerization of one amino acid, or by copolymerization of two or more amino acids. The polymerization temperature of the present invention is 130°C to 200°C, and the polymerization time is 3h to 24h. In certain embodiments of the present invention, the branched polyamino acid is obtained by homopolymerization of a first amino acid; or, the branched polyamino acid is obtained by copolymerization of a first amino acid and a 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. The number average molecular weight (Mn) of the branched polyamino acid of the present invention is 1000g / mol to 20000g / mol; the PDI of the branched polyamino acid is 1.3 to 2.6.

[0008] The photoactivated coupling group-containing compound of the present invention is also called a phenyl azide compound, which 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 certain embodiments of the present 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 a substituted phenylazido group or an unsubstituted phenylazido group; the substituent on the substituted phenylazido group is a halogen group, a hydroxyl group, a nitro group, a C1-C4 alkoxy group, a sulfo group or a C1-C4 alkyl group; specifically, the substituent on the substituted phenylazido group is F, Cl, Br, I, a hydroxyl group, a nitro group, a methoxy group, a sulfo group or a methyl group. More specifically, the photoactivated coupling group has a structure of Formula 1 to 14;

[0010]

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

[0012] In certain embodiments of the present invention, the compound containing a photoactivated coupling group is selected from one or more of 4-azido-2,3,5,6-tetrafluorobenzoic acid, succinimidyl 4-azidobenzoate, N-hydroxysulfosuccinimidyl-4-azidobenzoate, 5-azido-2-nitrobenzoic acid-N-succinimidyl ester, 4-(P-azidosalicyloylamino)-butylamine, 1-azido-4-bromobenzene, p-azidophenylglyoxal monohydrate, 6-[(4-azido-2-nitrophenyl)amino]hexanoic acid sulfosuccinimidyl ester, 3-(4-azidophenyl)propionic acid, 4-(4-azidophenyl)butyric acid and 2-azido-4,5-dimethoxybenzoic acid methyl ester.

[0013] The fabric photoactivated coupled antibacterial finishing agent material provided by the present invention is obtained by appropriately substituting a branched polyamino acid antibacterial material with a phenyl azide functional group containing a photoactivated coupling function. Specifically, the terminal amino group contained in the structure of the branched polyamino acid forms a bond with the reactive group in the structure of the photoactivated coupling compound, so that the photoactivated coupling group in the compound structure containing the photoactivated coupling group is reacted and bonded with the branched polyamino acid through a covalent bond to obtain the fabric photoactivated coupled antibacterial finishing agent material. The degree of substitution of the photoactivated coupling group on the fabric photoactivated coupled antibacterial finishing agent material of the present invention is 1% to 10%, and the antibacterial properties of the branched polyamino acid are not affected by the substitution of the photoactivated coupling group. The structural schematic diagram of the fabric photoactivated coupled antibacterial finishing agent material provided by the present invention is shown in FIG. Figure 1 As shown, Figure 1 It is a schematic structural diagram of the fabric light-activated coupled antibacterial finishing agent material of the present invention.

[0014] The present invention also provides a method for preparing the fabric light-activated coupled antibacterial finishing agent material described in any of the above technical solutions, comprising the following steps:

[0015] The branched polyamino acid and a compound containing a photoactivated coupling group are reacted to obtain a fabric photoactivated coupling antibacterial finishing agent material.

[0016] Specifically, a branched polyamino acid solution and a compound solution containing a photoactivated coupling group are reacted, wherein the branched polyamino acid solution is obtained by mixing a branched polyamino acid and water; the compound solution containing a photoactivated coupling group is obtained by mixing a compound containing a photoactivated coupling group and an organic solvent, wherein the organic solvent is not particularly limited, and can dissolve the compound containing a photoactivated coupling group and can be miscible with water. The reaction of the present invention is carried out at room temperature in the dark, and the reaction time is 20h to 30h, preferably 24h. In certain embodiments of the present invention, the room temperature is 20 to 30°C. After the reaction, the product obtained by the reaction is dialyzed and purified to obtain a retained solution, and the retained solution is concentrated and freeze-dried to obtain a fabric photoactivated coupled antibacterial finishing agent material. The branched polyamino acid and the photoactivated coupling compound of the present invention are the same as those described above and will not be repeated.

[0017] The present invention also provides a fabric photoactivated coupled antibacterial finishing agent. The fabric photoactivated coupled antibacterial finishing agent provided by the present invention is obtained by using the fabric photoactivated coupled antibacterial finishing agent material described in any of the above technical solutions alone as the fabric photoactivated coupled antibacterial finishing agent, or by using the fabric photoactivated coupled antibacterial finishing agent material described in any of the above technical solutions and additives. The additives are not particularly limited and can be additives commonly used in the art. The fabric photoactivated coupled antibacterial finishing agent described in the present invention is suitable for natural fiber fabrics, artificial fiber fabrics, synthetic fiber fabrics or blended fabrics composited with these fibers; the natural fiber fabrics are pure cotton fabrics, silk fabrics, wool fabrics or linen fabrics; the artificial fiber fabrics are viscose fibers, acetate fibers or cuprammonia fibers; the synthetic fiber fabrics are polyester, nylon, acrylic fiber, vinylon, polypropylene fiber, 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 coupled antibacterial finishing agent of the present invention belongs to a fabric reactive antibacterial finishing agent, which is a branched polyamino acid derivative containing a photoactivated coupling group. The photoactivated coupling group is used for photoactivation and coupling with fabrics. After ultraviolet light irradiation, the azide group on the benzene ring forms a highly active nitrene intermediate, which can non-specifically insert the CH or nucleophilic group XH bond (X=O, N, S) adjacent to the fabric surface to form a coupling, and a small amount of intermolecular cross-linking is also performed on the fabric surface to generate an insoluble branched polyamino acid coating. A large number of OH, NH and other nucleophilic groups on the surface of different fabrics provide sufficient photoactive coupling reaction sites, which are conducive to the coupling reaction, so that the branched polyamino acid antibacterial material can be bonded to the fabric surface, and a non-dissolving antibacterial fabric is prepared to achieve antibacterial finishing of the fabric. The fabric photoactivated coupled antibacterial finishing agent of the present invention can be non-specifically coupled with a variety of fabrics, and the resulting antibacterial fabric has no risk of antibacterial agent dissolution, has a broad-spectrum antibacterial and high washing resistance and antibacterial performance, thereby exerting an efficient and long-lasting antibacterial effect.

[0019] The present invention also provides a non-dissolving antibacterial fabric, which is obtained by fabric and the fabric light-activated coupled antibacterial finishing agent described in any of the above technical solutions. The fabric of the present invention includes natural fiber fabric, artificial fiber fabric, synthetic fiber fabric or blended fabrics composed of these fibers; the natural fiber fabric is pure cotton fabric, silk fabric, wool fabric or linen fabric; the artificial fiber fabric is viscose fiber, acetate fiber or cuprammonium fiber; the synthetic fiber fabric is polyester, nylon, acrylic fiber, vinylon, polypropylene fiber, chlorofiber or spandex; the blended fiber fabric is wool-viscose blended fabric, polyester-viscose blended fabric, nylon-cotton blended fabric or polyester-cotton blended fabric.

[0020] The present invention also provides a method for preparing the above-mentioned non-dissolving antibacterial fabric. The non-dissolving antibacterial fabric of the present invention is obtained by a padding-light treatment process, which specifically includes the following steps: soaking the fabric in the fabric photoactivated coupled antibacterial finishing agent described in any of the above technical solutions, and then subjecting the soaked fabric to light treatment to obtain the non-dissolving antibacterial fabric. In certain embodiments of the present invention, the fabric is soaked in a solution of the fabric photoactivated coupled antibacterial finishing agent with a mass concentration of 1% to 10%, then subjected to light treatment, and then washed and air-dried to obtain the non-dissolving antibacterial fabric. The soaking temperature of the present invention is room temperature to 120°C, preferably 50°C to 70°C, and more preferably 60°C; the soaking time is 0.5h to 6h, preferably 1h to 2h; the soaking bath ratio is (1 to 20):1, preferably (9 to 11):1, and preferably 10:1. The light treatment of the present invention is ultraviolet light treatment, the time of the light treatment is 30s to 30min, preferably 1min to 25min, preferably 3min to 15min, more preferably 10min; the power of the light treatment is 15mW / cm 2 ~25mW / cm 2 , preferably 20 mW / cm 2 .

[0021] The present invention provides a fabric photoactivated coupled antibacterial finishing agent material and a preparation method and application thereof. The fabric photoactivated coupled antibacterial finishing agent of the present invention is used to finish the fabric. No other reagents are required during the finishing process. The reaction conditions are mild and the energy consumption is low. The branched polyamino acid antibacterial material can be finished on the fabric surface by inducing coupling through ultraviolet light, giving the fabric excellent and lasting antibacterial properties. It is not easy to induce the production of drug resistance after long-term use. It has high safety. Only N2 byproducts are produced during the reaction process, which is environmentally friendly. In addition, the photoactivated coupled reaction rate is fast, the efficiency is high, the process is easy to control, and the requirements for processing equipment are not high. The reactive fabric photoactivated coupled antibacterial finishing agent can be applied to the fabric by dipping or spraying, and then treated with light. It is suitable for efficient and rapid large-scale antibacterial finishing applications of fabrics, and is also easy to integrate into the existing production process of fabrics, which is conducive to practical transformation and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the fabric light-activated coupled antibacterial finishing agent of the present invention;

[0023] Figure 2 This is a photo of an agar plate for testing the dissolution of the antibacterial agent in the antibacterial fabrics 1, 2 and 3 prepared by the photoactivated coupled antibacterial finishing agent in Example 7. DETAILED DESCRIPTION

[0024] The present invention discloses a light-activated coupled antibacterial finishing agent material for fabrics, a preparation method thereof, and an application thereof. A person skilled in the art can refer to the contents of this article and appropriately improve the process parameters to achieve the same. It should be particularly noted that all similar substitutions and modifications are obvious to a person skilled in the art, and they are all considered to be included in the present invention. The method and application of the present invention have been described through preferred embodiments, and relevant personnel can obviously modify or appropriately change and combine the method and application of this article without departing from the content, spirit, and scope of the present invention to realize and apply the technology of the present invention.

[0025] The present invention will be further described below in conjunction with embodiments:

[0026] Example 1

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

[0028] The preparation method of homopolymeric branched polyamino acids 2 to 4 is 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 above homopolymeric branched polyamino acid 1 are also recorded therein). If a solvent needs to be added, it is added to a 250 mL single-necked flask together with the raw materials and catalyst at the beginning:

[0029] Table 1

[0030]

[0031] Example 2

[0032] Synthesis of copolymeric branched polyamino acid 5: 20 g of lysine and 5 g of tryptophan were added as raw materials into a 100 mL single-necked flask, connected to a water separation device, replaced with nitrogen three times, and stirred and heated at 180 ° C for 6 h under a nitrogen atmosphere. After cooling to room temperature, the product was dissolved in ethanol and precipitated with ether. After drying, 18.5 g of light yellow solid branched lysine-tryptophan copolymer was obtained. GPC characterization: Mn = 4500 g / mol, PDI = 1.86.

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

[0034] Table 2

[0035]

[0036] Example 3

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

[0038] Embodiment 4:

[0039] Synthesis of branched polyamino acid-phenyl azide 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) were fully dissolved in water, and the former was slowly added dropwise to the latter solution. The reaction was stirred at room temperature in the dark. After 24 hours, the mixture was concentrated and dialyzed for purification. The retained solution was lyophilized to obtain a branched polyornithine-phenyl azide compound with a degree of substitution of 4-azidobenzoic acid of 1%.

[0040] Embodiment 5:

[0041] Synthesis of branched polyamino acid-phenyl azide 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 fully dissolved in water, and reacted with stirring at room temperature in the dark. After 24 hours, the reaction was concentrated and dialyzed for purification, and the retained solution was lyophilized to obtain a branched polylysine / ornithine copolymer-phenyl azide compound with a degree of substitution of 4-azidobenzoic acid of 3%.

[0042] Embodiment 6:

[0043] Synthesis of branched polyamino acid-phenyl azide derivative 4: Dissolve 1 g of succinic anhydride in 20 mL of anhydrous dichloromethane, add 206 mg of N,N'-dicyclohexylcarbodiimide and 122 mg of 4-dimethylaminopyridine (DMAP), slowly drop 4-(P-azido salicylamino)-butylamine dichloromethane solution (0.249 g / 20 mL) into the reaction system under ice-water bath conditions, stir the reaction and allow it to naturally return to room temperature, and react for 48 hours in the dark. Wash with saturated brine, dry over anhydrous magnesium sulfate, and purify by silica gel column chromatography.

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

[0045] Example 7

[0046] Preparation of photoactivated antibacterial finishing fabric: Under room temperature, the pure cotton fabric was immersed in a 5wt% branched polylysine-tetrafluorophenyl azide solution obtained in Example 3 at 60°C for 1h, with a bath ratio of 10:1, and then treated with ultraviolet light for 10min at an ultraviolet power of 20mW / cm 2 , washed with water and air-dried to obtain the antibacterial fabric 1.

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

[0048] Table 3

[0049]

[0050]

[0051] Comparative Example 1

[0052] Under room temperature conditions, pure cotton fabric was immersed in a 5 wt % branched polylysine-tetrafluorophenyl azide solution at 60° C. for 1 h with a bath ratio of 10:1, and then washed and air-dried to obtain the fabric as Comparative Example 1.

[0053] Comparative Example 2

[0054] Under room temperature, the cotton fabric was immersed in water at 60℃ for 1 hour with a bath ratio of 10:1, and then treated with UV light for 10 minutes with a UV power of 20mW / cm 2 The fabric obtained by washing and air-drying is used as comparative example 2.

[0055] Test Example 1

[0056] The antibacterial fabrics 1 to 10 prepared by the photoactivated coupled antibacterial finishing agent in Example 7 above and the fabrics prepared by Comparative Examples 1 and 2 were evaluated for their antibacterial properties in accordance with the requirements of the textile industry standard FZ / T 73023-2006 Antibacterial knitwear, and pure cotton fabrics without any treatment were selected as blank control samples; all fabrics were sterilized by high pressure before testing; and the antibacterial properties of all antibacterial fabrics were tested after washing 10, 20 and 50 times, so as to evaluate the antibacterial properties of the antibacterial fabrics. 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] Test Example 2

[0061] The dissolution behavior of the antibacterial agent in the antibacterial fabrics 1, 2 and 3 prepared by the photoactivated coupled antibacterial finishing agent in Example 7 above after one washing was evaluated according to the halo method listed in the textile industry standard FZ / T 73023-2006 Antibacterial knitwear. The test results corresponding to different strains are shown in Figure 2 As shown, Figure 2 This is a photo of an agar plate for testing the dissolution of the antibacterial agent in the antibacterial fabrics 1, 2 and 3 prepared by the photoactivated coupled antibacterial finishing agent in Example 7.

[0062] Through the antibacterial test of the above case, it can be known that the photoactivated coupled antibacterial finishing agent synthesized by the preparation method of the present invention is suitable for photoactivated coupled antibacterial finishing of fabrics of different materials, and the padding-ultraviolet light activation coupled finishing process is also universal; the antibacterial fabric obtained by finishing has no dissolution of the antibacterial agent, and is a non-dissolution type antibacterial fabric; the antibacterial rate of the coupled grafted antibacterial agent against the tested Escherichia coli, Staphylococcus aureus and Candida albicans can reach more than 99%, and the antibacterial performance of the antibacterial fabric after multiple washing cycles can also reach the AAA level of antibacterial fabric washing resistance and antibacterial performance. The photoactivated coupled antibacterial finishing agent obtained by the present invention is a reactive fabric photoactivated coupled antibacterial finishing agent, and the antibacterial fabric obtained by finishing is a non-dissolution type antibacterial fabric, which can achieve the purpose of high-efficiency and long-lasting antibacterial.

[0063] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Fabric light-activated coupled antibacterial finishing agent material, characterized in that: It is obtained by reacting a branched polyamino acid with a compound containing a photoactivated coupling group; The branched polyamino acid is obtained by polymerizing amino acids; The compound containing a 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 photoactivated coupling group is selected from a substituted phenyl azide group or an unsubstituted phenyl azide group; the substituent group on the substituted phenyl azide group is a halogen group, a hydroxyl group, a nitro group, a C1-C4 alkoxy group, a sulfonyl group or a C1-C4 alkyl group.

2. The fabric light-activated coupled antibacterial finishing agent material according to claim 1, characterized in that: The photoactivated coupling group has a structure of formula 1 to 14; 3. The fabric light-activated coupled antibacterial finishing agent material according to claim 1, characterized in that: The compound containing a photoactivated coupling group is selected from one or more of 4-azido-2,3,5,6-tetrafluorobenzoic acid, succinimidyl 4-azidobenzoate, N-hydroxysulfosuccinimidyl-4-azidobenzoate, 5-azido-2-nitrobenzoic acid-N-succinimidyl ester, 4-(P-azido salicylamido)-butylamine, 1-azido-4-bromobenzene, p-azidophenylglyoxal monohydrate, 6-[(4-azido-2-nitrophenyl)amino]hexanoic acid sulfonyl succinimidyl ester, 3-(4-azidophenyl)propionic acid, 4-(4-azidophenyl)butyric acid and 2-azido-4,5-dimethoxybenzoic acid methyl ester.

4. The fabric light-activated coupled antibacterial finishing agent material according to claim 1, characterized in that: The degree of substitution of the photoactivated coupling group on the branched polyamino acid is 1% to 10%.

5. The fabric light-activated coupled antibacterial finishing agent material according to claim 1, characterized in that: The number average molecular weight of the branched polyamino acid is 1000 g / mol to 20000 g / mol, and the PDI of the branched polyamino acid is 1.3 to 2.

6.

6. The fabric light-activated coupled 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.

7. The method for preparing the light-activated coupled antibacterial finishing agent material for fabrics according to any one of claims 1 to 6, characterized in that: The following steps are involved: The branched polyamino acid and a compound containing a photoactivated coupling group are reacted to obtain a fabric photoactivated coupling antibacterial finishing agent material.

8. A light-activated coupled antibacterial finishing agent for fabrics, characterized in that: The invention is the fabric light-activated coupled antibacterial finishing agent material as claimed in any one of claims 1 to 6; or, it is obtained from an additive and the fabric light-activated coupled antibacterial finishing agent material as claimed in any one of claims 1 to 6.

9. Non-dissolving antibacterial fabric, characterized in that: The invention is obtained from fabric and the fabric light-activated coupled antibacterial finishing agent as claimed in claim 8.

10. A method for preparing a non-dissolving antibacterial fabric, characterized in that: The following steps are involved: The fabric is immersed in the fabric light-activated coupled antibacterial finishing agent as claimed in claim 8, and then the immersed fabric is subjected to ultraviolet light treatment to obtain a non-dissolving antibacterial fabric.

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