Antibacterial finishing method of real silk fabric

Abstract

The invention discloses an antibacterial finishing method of a real silk fabric, which comprises the following steps: mixing an AgNO3 aqueous solution with an alkaline persimmon leaf extract aqueous solution for reaction, reducing AgNO3 into AgNPs by using the persimmon leaf extract as a reducing agent, and wrapping the surface of the AgNPs with the persimmon leaf extract as an end-capping reagent to form AgNPs-coated persimmon leaf extract nanoparticles; the real silk fabric is soaked in an AgNPs persimmon leaf extract nanoparticle aqueous solution for finishing, and the antibacterial real silk fabric is obtained. An AgNO3 silver source and the persimmon leaf extract are mixed and react to synthesize AgNPs persimmon leaf extract nanoparticles, the persimmon leaf extract reduces AgNO3 into AgNPs and wraps the surface of the AgNPs to maintain the stability of the AgNPs, the real silk fabric is finished through the dipping finishing process, the nanoparticles are adsorbed on the surface of the real silk fabric, the antibacterial performance is excellent, and the antibacterial effect is good. The raw materials are wide in source, low in cost and stable in performance.

Description

Technical Field

[0001] The present invention relates to the technical field of functional fabrics, and particularly relates to an antibacterial finishing method for silk fabrics. Background Art

[0002] Silk products are widely favored by people because of their soft texture, good affinity for human skin, good moisture absorption and air permeability, and renewable properties. However, due to the natural protein structure and good moisture absorption performance of silk fibers, bacteria are extremely easy to breed during daily use and storage, resulting in product discoloration, mildew and degradation, and endangering people's health.

[0003] Nano-silver (AgNPs) has the characteristics of broad-spectrum antibacterial activity and not easily causing bacteria to develop drug resistance, and has dominated the application of inorganic antibacterial finishing agents. Due to its large specific surface area and high surface energy, nano-silver is easily attached to the surface of bacteria, combines with substances such as peptidoglycan and membrane proteins on the surface of bacteria, destroys the cell wall and cell membrane of bacteria, and causes bacteria to die. However, the traditional physical and chemical methods for synthesizing nano-silver have disadvantages such as high cost and heavy pollution. At the same time, due to the high surface energy of nano-silver particles, agglomeration is likely to occur. Once agglomerated, it will affect the subsequent finishing process. Therefore, it is of great significance to research and develop a green, environmentally friendly, sustainable method with wide sources of raw materials, low cost and environmental friendliness. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides an antibacterial finishing method for silk fabrics. Using AgNO3 as the silver source, it is mixed and reacted with the persimmon leaf extract to synthesize AgNPs@persimmon leaf extract nanoparticles. Among them, the persimmon leaf extract acts as a reducing agent to reduce AgNO3 to AgNPs, and at the same time acts as a capping agent to wrap on the surface of AgNPs to maintain the stability of AgNPs, improve the stability of AgNPs, avoid agglomeration of nanoparticles, and enhance the stability of the finishing solution. The silk fabric is finished through the impregnation finishing process, which is green, environmentally friendly, has wide sources of raw materials, low cost and stable performance.

[0005] In order to solve the above technical problems, the present invention provides an antibacterial finishing method for silk fabrics, including the following steps:

[0006] S1. Mix and react an aqueous solution of AgNO3 with an aqueous solution of persimmon leaf extract under alkaline conditions. Among them, the persimmon leaf extract acts as a reducing agent to reduce AgNO3 to AgNPs, and at the same time acts as a capping agent to wrap on the surface of AgNPs to form AgNPs@persimmon leaf extract nanoparticles;

[0007] S2. Dissolve the AgNPs@persimmon leaf extract nanoparticles in water to obtain a finishing solution, and immerse the silk fabric in the finishing solution for finishing treatment to obtain an antibacterial silk fabric.

[0008] In the present invention, AgNO3 is used as the silver source, which is mixed and reacted with the persimmon leaf extract to synthesize AgNPs@persimmon leaf extract nanoparticles. The persimmon leaf extract serves as a reducing agent to reduce AgNO3 to AgNPs. At the same time, the persimmon leaf extract also acts as a capping agent to coat the surface of AgNPs, which can maintain the stability of AgNPs, improve the stability of AgNPs, avoid the problem of aggregation of AgNPs nanoparticles, enhance the stability of the finishing solution, and thus improve the performance of the finished silk fabric.

[0009] The chemical components of persimmon leaves include polyphenols, triterpenoids, alkaloids, fatty acids, volatile oils and other main components and other components. Its extract has antioxidant, antibacterial and anti-inflammatory properties. Among them, polyphenolic compounds are used as reducing agents to prepare AgNPs, and a phenolic aldehyde bilayer film is formed to coat the surface of AgNPs. Without the need to additionally add protective agents and capping agents, the stability of AgNPs can be maintained. During the preparation of AgNPs@persimmon leaf extract nanoparticles through redox reaction, polyphenolic compounds are ionized under alkaline conditions, and then transfer an electron to Ag + , causing Ag + to be reduced to Ag 0 , forming the AgNPs core. At the same time, the phenol in the polyphenolic compounds is oxidized to quinone, which coats the surface of the AgNPs core as a protective agent to prevent the AgNPs cores from colliding with each other and aggregating, and finally forms stable AgNPs@persimmon leaf extract nanoparticles.

[0010] In the present invention, the AgNPs@persimmon leaf extract nanoparticles are dissolved in water to form a finishing solution, and the silk fabric is finished through the impregnation finishing process, which is green and environmentally friendly, has a wide range of raw material sources, low cost, and stable performance.

[0011] Furthermore, the preparation method of the persimmon leaf extract is as follows: Persimmon leaf powder is added to a mixed solvent of ethanol and water, and refluxed and extracted at 75 - 85 °C for 1 - 3 h. After filtration, concentration, and drying, the persimmon leaf extract is obtained. Preferably, the reflux extraction temperature is 80 °C and the time is 2 h.

[0012] Furthermore, the filter residue after filtration is repeatedly refluxed and extracted 2 - 3 times, and the supernatant liquids are combined and then concentrated.

[0013] Furthermore, the concentration of the persimmon leaf powder in the mixed solvent is 0.045 - 0.06 g / mL, preferably 0.5 g / mL.

[0014] Furthermore, in the mixed solvent, the volume ratio of ethanol to water is (0.9 - 1.1):(0.9 - 1.1), preferably 1:1.

[0015] Further, in S1, the temperature of the mixing reaction is 80 - 90 °C, and the time is 2.5 - 3.5 h.

[0016] Further, in S1, the pH value of the alkaline condition is 9.5 - 10.5, the pH value regulator is sodium hydroxide, and the pH value is preferably 10.0.

[0017] Further, in S2, the concentration of AgNPs@persimmon leaf extract nanoparticles in the finishing solution is 10 - 20 μg / mL.

[0018] Further, in S2, the bath ratio of the silk fabric to the finishing solution is 1:(40 - 50).

[0019] Further, in S2, the finishing treatment is specifically: heating to 50 - 80 °C at a rate of 1.8 - 2.2 °C / min and holding for 50 - 80 min.

[0020] During the finishing treatment, the silk fabric is immersed in the finishing solution. The AgNPs@persimmon leaf extract nanoparticles in the finishing solution are adsorbed onto the surface of the silk fibers of the silk fabric through the action of van der Waals forces and hydrogen bonds, realizing the finishing of the silk fabric and obtaining an antibacterial silk fabric. Among them, the antibacterial mechanism of nano - silver is as follows: (1) When nano - silver adsorbs on the surface of bacteria, it will cause obvious changes in the cell morphology of bacteria. Since silver is considered a Lewis acid, it usually reacts with Lewis bases (such as phosphorus - and sulfur - containing biomolecules, which are the main components of cell membranes, proteins, and DNA bases). Therefore, nano - silver will adsorb on the cell wall and cell membrane, thus destroying the cell membrane. At the same time, the neutralization of the surface charge of the cell membrane will change the permeability of the cell membrane, leading to cell death. The adhesion of nano - silver also increases the stiffness of the membrane, changing the membrane from an ordered state to a disordered state and decomposing the composition of the membrane (such as phosphorus - and sulfur - containing biomolecules, which are the main components of cell membranes, proteins, and DNA bases) during the killing process. (2) Nano - silver can bind to membrane proteins (such as respiratory chain proteins and transport proteins), greatly interfering with membrane permeability, the respiratory chain, cell division, and ion transport. During the nano - silver bactericidal process, leakage of cell inclusions and uncontrolled cytoplasmic membrane transport caused by increased membrane permeability are often observed. In addition, nano - silver attached to membrane proteins may also interfere with the uptake and release of phosphate ions, weaken the respiratory chain, and hinder energy production. (3) After attaching to the cell membrane, nano - silver can also penetrate bacteria and interact with cell structures and biomolecules (such as lipids, proteins, and DNA), thereby inhibiting the processes of transcription, translation, and protein synthesis and destroying cell functions. At the same time, the shearing or denaturation of DNA and the blocking of sugar metabolism are also related to the antibacterial effect of nano - silver.

[0021] Further, in S1, after the mixing reaction, the steps of centrifugation, removing the supernatant, and washing with deionized water are also included.

[0022] The second aspect of the present invention discloses an antibacterial silk fabric prepared by the antibacterial finishing method of the silk fabric described in the first aspect.

[0023] Advantages of the present invention:

[0024] In the present invention, using AgNO3 as the silver source, it is mixed and reacted with persimmon leaf extract to synthesize AgNPs@persimmon leaf extract nanoparticles. The persimmon leaf extract reduces AgNO3 to AgNPs as a reducing agent, and at the same time, the persimmon leaf extract also acts as a capping agent to wrap on the surface of AgNPs, which can maintain the stability of AgNPs, improve the stability of AgNPs, avoid the problem of aggregation of AgNPs nanoparticles, enhance the stability of the finishing solution, and thus improve the performance of the silk fabric after finishing.

[0025] The present invention dissolves AgNPs@persimmon leaf extract nanoparticles in water to form a finishing solution, and the silk fabric is finished through an impregnation finishing process. The AgNPs nanoparticles are adsorbed on the surface of the silk fabric, and can bind to substances such as peptidoglycan and membrane proteins on the surface of bacteria, destroying the cell wall and cell membrane of bacteria, resulting in the death of bacteria, and having excellent bactericidal performance.

[0026] The antibacterial finishing method of the silk fabric of the present invention is green and environmentally friendly, has a wide range of raw material sources, low cost, and stable performance. Specific embodiments

[0027] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0028] This embodiment provides an antibacterial finishing method for silk fabric, including the following steps:

[0029] S1. Mix and react an AgNO3 aqueous solution with an aqueous solution of persimmon leaf extract under alkaline conditions. Among them, the persimmon leaf extract reduces AgNO3 to AgNPs as a reducing agent, and at the same time acts as a capping agent to wrap on the surface of AgNPs, forming AgNPs@persimmon leaf extract nanoparticles;

[0030] S2. Dissolve the AgNPs@persimmon leaf extract nanoparticles in water to obtain a finishing solution, immerse the silk fabric in the finishing solution for finishing treatment to obtain an antibacterial silk fabric. In this example, AgNO3 was used as the silver source, which was mixed and reacted with the persimmon leaf extract to synthesize AgNPs@persimmon leaf extract nanoparticles. The persimmon leaf extract reduced AgNO3 to AgNPs as a reducing agent. At the same time, the persimmon leaf extract also acted as a capping agent to wrap on the surface of AgNPs, which could maintain the stability of AgNPs, improve the stability of AgNPs, avoid the problem of aggregation of AgNPs nanoparticles, enhance the stability of the finishing solution, and thus improve the performance of the silk fabric after finishing; dissolve the AgNPs@persimmon leaf extract nanoparticles in water to form a finishing solution, and finish the silk fabric through the impregnation finishing process, which is green and environmentally friendly, has a wide range of raw material sources, low cost, and stable performance.

[0031] As a preferred embodiment, the preparation method of the persimmon leaf extract is as follows: add persimmon leaf powder into a mixed solvent of ethanol and water, reflux and extract at 75 - 85 °C for 1 - 3 h, filter, concentrate, and dry to obtain the persimmon leaf extract. Preferably, the reflux extraction temperature is 80 °C and the time is 2 h. The filter residue after filtration is repeatedly refluxed and extracted 2 - 3 times, and the supernatant is combined and concentrated. The concentration of the persimmon leaf powder in the mixed solvent is 0.045 - 0.06 g / mL, preferably 0.5 g / mL. In the mixed solvent, the volume ratio of ethanol to water is (0.9 - 1.1):(0.9 - 1.1), preferably 1:1.

[0032] As a preferred embodiment, in S1, the temperature of the mixed reaction is 80 - 90 °C, and the time is 2.5 - 3.5 h; the pH value of the alkaline condition is 9.5 - 10.5, where the pH value regulator is sodium hydroxide, and the pH value is preferably 10.0. After the mixed reaction, it also includes the steps of centrifugation, removing the supernatant, and washing with deionized water.

[0033] As a preferred embodiment, in S2, the concentration of AgNPs@persimmon leaf extract nanoparticles in the finishing solution is 10 - 20 μg / mL; the bath ratio of the silk fabric to the finishing solution is 1:(40 - 50); the finishing treatment is specifically as follows: heat up to 50 - 80 °C at a rate of 1.8 - 2.2 °C / min and keep warm for 50 - 80 min. During the finishing treatment, the silk fabric is immersed in the finishing solution, and the AgNPs@persimmon leaf extract nanoparticles in the finishing solution are adsorbed onto the surface of the silk fibers of the silk fabric through the action of van der Waals forces and hydrogen bonds to achieve the finishing of the silk fabric and obtain an antibacterial silk fabric.

[0034] Another example provides an antibacterial silk fabric prepared by the antibacterial finishing method of the silk fabric described in the above example.

[0035] Example 1

[0036] An antibacterial finishing method for silk fabrics, comprising the following steps:

[0037] (1) Weigh 5 g of persimmon leaf powder and put it into a 250 mL conical flask. Add 50% ethanol aqueous solution (V / V) at a solid-liquid ratio of 1 g:20 mL, reflux and extract in a constant temperature water bath at 80 °C for 2 h, filter, repeat the extraction of the filter residue twice, combine the supernatant, concentrate and recover under reduced pressure with a rotary evaporator, and dry to obtain persimmon leaf extract.

[0038] (2) Add 50 mL of deionized water to a round-bottom flask, place it in a water bath, turn on the magnetic stirrer and stir at 800 r / min, adjust the temperature to 85 °C, and add 4 mL of AgNO3 aqueous solution with a concentration of 10 mg / mL under the condition of condensation reflux. Measure 10 mL of persimmon leaf extract aqueous solution with a concentration of 2 mg / mL, adjust its pH value to 10 with 1 mol / L NaOH aqueous solution and then add it to the round-bottom flask. After stirring and heating at 85 °C for 3 h, cool to room temperature to obtain AgNPs@persimmon leaf extract nanoparticle solution. Put the AgNPs@persimmon leaf extract nanoparticle solution into a centrifuge tube, centrifuge at 10000 r / min for 20 minutes, remove the supernatant, wash twice with deionized water, remove the unreacted AgNO3, and store it in a refrigerator at 4 °C in the dark.

[0039] (3) Disperse AgNPs@persimmon leaf extract nanoparticles in water to obtain an AgNPs@persimmon leaf extract nanoparticle finishing solution with a silver concentration of 20 μg / mL; immerse the silk fabric in the AgNPs@persimmon leaf extract nanoparticle finishing solution for finishing, with a bath ratio of 1:50, heat from 30 °C to 60 °C at a rate of 2 °C / min and keep warm for 80 min, rinse with deionized water and dry naturally to obtain antibacterial silk fabric.

[0040] Example 2

[0041] An antibacterial finishing method for silk fabrics, comprising the following steps:

[0042] (1) Weigh 5 g of persimmon leaf powder and put it into a 250 mL conical flask. Add 50% ethanol aqueous solution (V / V) at a solid-liquid ratio of 1 g:20 mL, reflux and extract in a constant temperature water bath at 80 °C for 2 h, filter, repeat the extraction of the filter residue twice, combine the supernatant, concentrate and recover under reduced pressure with a rotary evaporator, and dry to obtain persimmon leaf extract.

[0043] (2) Add 50 mL of deionized water to a round-bottom flask, place it in a water bath, turn on the magnetic stirrer and stir at 800 r / min, adjust the temperature to 80 °C, and under the condition of condensation reflux, add 4 mL of an aqueous AgNO3 solution with a concentration of 10 mg / mL. Measure 10 mL of an aqueous persimmon leaf extract solution with a concentration of 2 mg / mL, adjust its pH value to 10 with 1 mol / L NaOH aqueous solution, and then add it to the round-bottom flask. After stirring and heating at 80 °C for 3.5 h, cool to room temperature to obtain an AgNPs@persimmon leaf extract nanoparticle solution. Transfer the AgNPs@persimmon leaf extract nanoparticle solution into a centrifuge tube, centrifuge at 10000 r / min for 20 minutes, remove the supernatant, wash twice with deionized water, remove the unreacted AgNO3, and then store it in a refrigerator at 4 °C in the dark.

[0044] (3) Disperse the AgNPs@persimmon leaf extract nanoparticles in water to obtain an AgNPs@persimmon leaf extract nanoparticle finishing solution with a silver concentration of 10 μg / mL; immerse the silk fabric in the AgNPs@persimmon leaf extract nanoparticle finishing solution for finishing, with a bath ratio of 1:50, heat from 30 °C to 50 °C at a rate of 1.8 °C / min and keep warm for 80 min, rinse with deionized water and air dry naturally to obtain an antibacterial silk fabric.

[0045] Example 3

[0046] An antibacterial finishing method for silk fabric, comprising the following steps:

[0047] (1) Weigh 5 g of persimmon leaf powder and put it into a 250 mL conical flask, add 50% ethanol aqueous solution (V / V) at a solid-liquid ratio of 1 g:20 mL, reflux and extract in a constant temperature water bath at 80 °C for 2 h, filter, repeat the extraction of the filter residue twice, combine the supernatant, recover by rotary evaporator under reduced pressure, dry to obtain persimmon leaf extract.

[0048] (2) Add 50 mL of deionized water to a round-bottom flask, place it in a water bath, turn on the magnetic stirrer and stir at 800 r / min, adjust the temperature to 90 °C, and under the condition of condensation reflux, add 4 mL of an aqueous AgNO3 solution with a concentration of 10 mg / mL. Measure 10 mL of an aqueous persimmon leaf extract solution with a concentration of 2 mg / mL, adjust its pH value to 10 with 1 mol / L NaOH aqueous solution, and then add it to the round-bottom flask. After stirring and heating at 90 °C for 2.5 h, cool to room temperature to obtain an AgNPs@persimmon leaf extract nanoparticle solution. Transfer the AgNPs@persimmon leaf extract nanoparticle solution into a centrifuge tube, centrifuge at 10000 r / min for 20 minutes, remove the supernatant, wash twice with deionized water, remove the unreacted AgNO3, and then store it in a refrigerator at 4 °C in the dark.

[0049] (3) Disperse the AgNPs@persimmon leaf extract nanoparticles in water to obtain an AgNPs@persimmon leaf extract nanoparticle finishing solution with a silver concentration of 15 μg / mL; immerse the silk fabric in the AgNPs@persimmon leaf extract nanoparticle finishing solution for finishing, with a bath ratio of 1:50, heat from 30 °C to 80 °C at a rate of 2.2 °C / min and keep warm for 50 min, rinse with deionized water and air dry naturally to obtain the antibacterial silk fabric.

[0050] Example 4

[0051] An antibacterial finishing method for silk fabric, comprising the following steps:

[0052] (1) Weigh 5 g of persimmon leaf powder and put it into a 250 mL conical flask, add 50% ethanol aqueous solution (V / V) at a material-liquid ratio of 1 g:20 mL, reflux and extract in a constant temperature water bath at 80 °C for 2 h, filter, repeat the extraction of the filter residue twice, combine the supernatant, recover by rotary evaporation under reduced pressure, and dry to obtain the persimmon leaf extract.

[0053] (2) Add 50 mL of deionized water to a round-bottomed flask, place it in a water bath, turn on the magnetic stirrer and stir at 800 r / min, adjust the temperature to 85 °C, and add 4 mL of 10 mg / mL AgNO3 aqueous solution under the condition of condensation reflux. Measure 10 mL of 2 mg / mL persimmon leaf extract aqueous solution, adjust its pH value to 10 with 1 mol / L NaOH aqueous solution and then add it to the round-bottomed flask. After stirring and heating at 85 °C for 3 h, cool to room temperature to obtain the AgNPs@persimmon leaf extract nanoparticle solution. Pour the AgNPs@persimmon leaf extract nanoparticle solution into a centrifuge tube, centrifuge at 10000 r / min for 20 minutes, remove the supernatant, wash twice with deionized water, remove the unreacted AgNO3, and store it in a refrigerator at 4 °C in the dark.

[0054] (3) Disperse the AgNPs@persimmon leaf extract nanoparticles in water to obtain an AgNPs@persimmon leaf extract nanoparticle finishing solution with a silver concentration of 12 μg / mL; immerse the silk fabric in the AgNPs@persimmon leaf extract nanoparticle finishing solution for finishing, with a bath ratio of 1:50, heat from 30 °C to 60 °C at a rate of 2 °C / min and keep warm for 70 min, rinse with deionized water and air dry naturally to obtain the antibacterial silk fabric.

[0055] Test Example 1

[0056] Perform performance tests on the antibacterial silk fabrics prepared in Examples 1-4:

[0057] (1) Antibacterial performance: The antibacterial rate of the antibacterial silk fabric was tested according to the standard of GB / T 20944.3-2008 "Evaluation of antibacterial properties of textiles - Part 3: Oscillation method".

[0058] (2) Wash resistance: The wash resistance of the antibacterial silk fabric was tested according to the standard of AATCC 124-2006 "Determination of the appearance flatness of fabrics after multiple home launderings".

[0059] The antibacterial performance and wash resistance of the antibacterial silk fabrics prepared in Examples 1-4 are shown in Table 1. As can be seen from Table 1, the antibacterial silk fabrics obtained in Examples 1-4 of the present invention have good antibacterial performance and wash resistance.

[0060] Table 1

[0061]

[0062] The present invention has been described in detail above in combination with specific embodiments and exemplary examples, but these descriptions should not be construed as limiting the present invention. Those skilled in the art understand that without departing from the spirit and scope of the present invention, various equivalent substitutions, modifications or improvements can be made to the technical solutions and their implementation manners of the present invention, and these all fall within the scope of the present invention. The protection scope of the present invention shall be subject to the appended claims.

Claims

1. An antibacterial finishing method for silk fabrics, characterized in that, It includes the following steps: S1. Mix an aqueous solution of AgNO3 with an aqueous solution of persimmon leaf extract under alkaline conditions. Herein, the persimmon leaf extract acts as a reducing agent to reduce AgNO3 to AgNPs, and at the same time acts as a capping agent to wrap on the surface of AgNPs, forming AgNPs@persimmon leaf extract nanoparticles; S2. Dissolve the AgNPs@persimmon leaf extract nanoparticles in water to obtain a finishing solution, and immerse the silk fabric in the finishing solution for finishing treatment to obtain an antibacterial silk fabric.

2. The antibacterial finishing method of the silk fabric according to claim 1, characterized in that, The preparation method of the persimmon leaf extract is as follows: Add persimmon leaf powder into a mixed solvent of ethanol and water, reflux and extract at 75 - 85 °C for 1 - 3 h, filter, concentrate, and dry to obtain the persimmon leaf extract.

3. The antibacterial finishing method for silk fabric according to claim 2, characterized in that, In the mixed solvent, the volume ratio of ethanol to water is (0.9 - 1.1):(0.9 - 1.1).

4. The antibacterial finishing method of the silk fabric as described in claim 1, characterized in that, In S1, the temperature of the mixing reaction is 80 - 90 °C, and the time is 2.5 - 3.5 h.

5. The antibacterial finishing method for silk fabrics as described in claim 1, characterized in that, In S1, the pH value of the alkaline condition is 9.5 - 10.5, and the pH value regulator is sodium hydroxide.

6. The antibacterial finishing method of the silk fabric according to claim 1, characterized in that, In S2, the concentration of AgNPs@persimmon leaf extract nanoparticles in the finishing solution is 10 - 20 μg / mL.

7. The antibacterial finishing method of the silk fabric according to claim 1, characterized in that In S2, the bath ratio of the silk fabric to the finishing solution is 1:(40 - 50).

8. The antibacterial finishing method of the silk fabric according to claim 1, characterized in that, In S2, the finishing treatment is specifically: heat up to 50 - 80 °C at a rate of 1.8 - 2.2 °C / min and keep warm for 50 - 80 min.

9. The antibacterial finishing method of the silk fabric according to claim 1, characterized in that, In S1, after the mixing reaction, it further includes the steps of centrifugation, removing the supernatant, and washing with deionized water.

10. An antibacterial silk fabric prepared by the antibacterial finishing method of the silk fabric according to any one of claims 1 - 9.

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