A method for preparing a reactive quaternary ammonium salt of chitosan modified cellulose fabric based on dispersion system

Abstract

The application discloses a preparation method of active chitosan quaternary ammonium salt modified cellulose fabric based on a dispersion system, and belongs to the field of textile chemistry. The effective grafting of chitosan quaternary ammonium salt and nitrogen-containing heterocyclic monomers is realized by using a dispersion system, the active sites on the chitosan quaternary ammonium salt are increased, the covalent grafting effect of the active chitosan quaternary ammonium salt and the cellulose fabric is improved, the cellulose fabric is endowed with durable antibacterial function, the dyeing performance of the cellulose fabric in natural dyes and active dyes is improved, and when the cellulose fabric prepared by the method is dyed by using active dyes, the amount of neutral salt can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to a method for preparing active chitosan quaternary ammonium salt modified cellulose fabric based on dispersion system, belonging to the field of textile chemistry. BACKGROUND

[0002] Cellulose fiber is a fiber with cellulose polysaccharide as the main component. According to the source and processing method, it can be divided into cotton, hemp, lyocell, bamboo fiber, etc., which accounts for a large share in China's textile raw materials. Cellulose fiber textiles have good moisture absorption and moisture permeability, comfortable to wear, soft hand feeling and other advantages, and are deeply loved by consumers. Chitosan is a natural cationic polysaccharide, which is derived from abundant chitin in nature. Its structure is similar to that of cellulose, and it has good biocompatibility and biodegradability.

[0003] Chitosan is used for functional finishing of textiles, which not only can endow textiles with certain antibacterial properties, but also can improve the dyeing quality of textiles, effectively increase the added value of textiles, and meet people's demand for high-quality textiles. Chitosan is difficult to dissolve in water and organic solvents due to its large molecular weight and strong intramolecular and intermolecular hydrogen bonds, which greatly limits the application of chitosan. Quaternization of chitosan can effectively improve the solubility of chitosan and expand the application range of chitosan. N-(2-hydroxy-3-trimethyl) propyl ammonium chloride chitosan (HTCC) is a commonly used soluble chitosan quaternary ammonium salt. HTCC shows similar biological properties to chitosan, such as biodegradability, biocompatibility and antibacterial properties. In addition to these common properties, HTCC also shows better water solubility, wettability, mucosal adsorption and good positive charge, which can be used as an ideal functional modification material for cellulose textiles. However, there is a lack of effective covalent bonding method for HTCC in the functional finishing of textiles, which limits the application of HTCC in textiles. SUMMARY

[0004] [TECHNICAL PROBLEM]

[0005] In the prior art, there is a lack of effective covalent bonding method for HTCC in the functional finishing of textiles, which limits the application of HTCC in textiles.

[0006] [TECHNICAL SCHEME]

[0007] In order to solve the above problems, the present invention aims to provide a preparation method of chitosan quaternary ammonium salt-modified cellulose fabric based on a dispersion system. The dispersion system is used to achieve effective grafting of chitosan quaternary ammonium salt and nitrogen-containing heterocyclic monomers, thereby increasing the active sites on the chitosan quaternary ammonium salt, thereby improving the effect of covalent grafting of the active chitosan quaternary ammonium salt and the cellulose fabric, and imparting a long-lasting antibacterial function to the cellulose fabric. At the same time, when the cellulose fabric prepared by the method is dyed with a reactive dye, the amount of neutral salt used can be reduced, thereby improving the dyeing depth.

[0008] The first object of the present invention is to provide a method for preparing an active chitosan quaternary ammonium salt modified cellulose fabric based on a dispersion system, comprising the following steps:

[0009] S1. Synthesis of chitosan quaternary ammonium salt: chitosan and glycidyltrimethylammonium chloride are dissolved in an ionic liquid, and chitosan quaternary ammonium salt is prepared by a homogeneous reaction;

[0010] S2, preparation of active chitosan quaternary ammonium salt solution: homogeneously dispersing the nitrogen-containing heterocyclic monomer and the dispersant, mixing the dispersed chitosan quaternary ammonium salt prepared in step S1, adding an acid binding agent, and reacting to obtain an active chitosan quaternary ammonium salt solution;

[0011] S3. Preparation of active chitosan quaternary ammonium salt modified cellulose fabric: the active chitosan quaternary ammonium salt solution prepared in step S2, cellulose fabric and sodium carbonate are mixed in deionized water, shaken, and active chitosan quaternary ammonium salt modified cellulose fabric is prepared by nucleophilic reaction.

[0012] In one embodiment of the present invention, in step S1, the ionic liquid is 1-allyl-3-methylimidazolium chloride [AMIm]Cl ionic liquid.

[0013] In one embodiment of the present invention, in step S1, the molecular weight of the chitosan quaternary ammonium salt is 3000-5000.

[0014] In one embodiment of the present invention, in step S1, the reaction temperature is 70-90°C, more preferably 80°C.

[0015] In one embodiment of the present invention, in step S1, the reaction time is 7-9 hours, more preferably 8 hours.

[0016] In one embodiment of the present invention, in step S1, the mass ratio of chitosan, ionic liquid and glycidyltrimethylammonium chloride is 1:(40-60):(2-3), more preferably 1:50:2.3.

[0017] In one embodiment of the present invention, in step S2, the dispersant is one or a combination of octadecyltrimethylammonium chloride and N-dodecyl-2-pyrrolidone.

[0018] In one embodiment of the present invention, in step S2, the nitrogen-containing heterocyclic monomer is one or more of cyanuric chloride, 2,4-dichloro-1,3,5-triazine, 3,4,6-trichloropyridazine, 2-amino-4,6-dichloro-1,3,5-triazine, and phosphazene.

[0019] In one embodiment of the present invention, in step S2, the temperature for homogeneous dispersion is 0-5°C, more preferably 0°C.

[0020] In one embodiment of the present invention, in step S2, the homogenous dispersion time is 5-10 minutes, more preferably 10 minutes.

[0021] In one embodiment of the present invention, in step S2, the rotation speed of the homogenous dispersion is 1000-5000 rpm, more preferably 3000 rpm.

[0022] In one embodiment of the present invention, in step S2, the mass ratio of chitosan quaternary ammonium salt, nitrogen-containing heterocyclic monomer and dispersant is 4:(7.5-17.35):(2-3), more preferably 4:9:2.7.

[0023] In one embodiment of the present invention, in step S2, the acid binding agent is a 0.1-0.2 g / mL sodium carbonate solution, more preferably a 0.106 g / mL sodium carbonate solution.

[0024] In one embodiment of the present invention, in step S2, the volume mass ratio of the added amount of the acid binding agent to the chitosan quaternary ammonium salt is (20-25):1, mL / g, and more preferably 25:1, mL / g.

[0025] In one embodiment of the present invention, in step S2, the reaction temperature is 0-5°C, more preferably 0°C.

[0026] In one embodiment of the present invention, in step S2, the reaction time is 1-3 hours, more preferably 3 hours.

[0027] In one embodiment of the present invention, in step S3, the cellulose fabric is one of cotton fabric, viscose fabric and lyocell fabric.

[0028] In one embodiment of the present invention, in step S3, the bath ratio of the nucleophilic reaction is 1:(20-30), more preferably 1:25.

[0029] In one embodiment of the present invention, in step S3, the temperature of the nucleophilic reaction is 30-50°C, more preferably 50°C.

[0030] In one embodiment of the present invention, in step S3, the time of the nucleophilic reaction is 2-4 hours, more preferably 4 hours.

[0031] In one embodiment of the present invention, in step S3, the volume mass ratio of the active chitosan quaternary ammonium salt solution to the cellulose fabric is (4-6):1, mL / g, and more preferably 5:1, mL / g.

[0032] In one embodiment of the present invention, in step S3, the mass ratio of sodium carbonate to cellulose fabric is 1:(3-5), more preferably 1:4.

[0033] The second object of the present invention is to provide an active chitosan quaternary ammonium salt modified cellulose fabric prepared based on the above method.

[0034] The third object of the present invention is to provide the application of the above-mentioned active chitosan quaternary ammonium salt modified cellulose fabric in the field of functional textiles and textile dyeing.

[0035] [Beneficial Effects]

[0036] (1) The present invention can achieve effective covalent grafting of chitosan quaternary ammonium salt and cellulose fabric through a dispersed system.

[0037] (2) The chitosan quaternary ammonium salt modified cellulose fabric prepared by the present invention can effectively reduce the amount of neutral salt used in dyeing cellulose fabric with reactive dyes and improve the dyeing depth.

[0038] (3) The active chitosan modified cotton prepared by the present invention has significantly improved antibacterial properties against Escherichia coli and Staphylococcus aureus compared to raw cotton. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 Images of raw cotton and activated chitosan-modified cotton;

[0040] Figure 2 SEM images of raw cotton and active chitosan-modified cotton;

[0041] Figure 3 Examples 1-7 Active chitosan-modified cellulose fabric treated E. coli and S. aureus agar plate images. DETAILED DESCRIPTION

[0042] The present invention will be further described below with reference to specific examples. The examples are only used to explain the present invention and are not used to limit the scope of the present invention.

[0043] The performance tests involved in the present invention are as follows:

[0044] ① Grafting rate test: Based on the mass change of cotton before and after modification after drying, the grafting rate is calculated using the following equation;

[0045]

[0046] Among them: m1 is the mass of the fabric sample before grafting; m2 is the mass of the fabric sample after grafting.

[0047] ② Natural / Reactive Dye Test: Fold the dyed fabric twice to ensure uniform color and opacity at the test site. Measure the K / S value of the cellulose fabric using a Datacolor spectrophotometer (D65 illuminant, 10° field of view) with a large aperture (30mm). Repeated measurements were taken at randomly varying locations on each sample, and the average value was calculated.

[0048] ③ Antibacterial performance test: The antibacterial effect of the modified cotton was evaluated using the improved AATCC-100 method. The inoculated Staphylococcus aureus and Escherichia coli were transferred to a constant temperature shaker at 37°C and 130r for 18-24h, and the bacterial solution was diluted to 3×10 5 -4×10 5 CFU / mL. Take 0.15g of grafted cellulose fabric sample, sterilize it by UV irradiation for 30min, add it to a conical flask, add 100uL of diluted bacterial solution and culture it at 24℃ and 150r with shaking for 18-24h. Dilute the shaken bacterial solution by ten-fold dilution method, take 100uL of bacterial solution for each dilution gradient and spread it on the agar plate, spread two plates in parallel for each dilution gradient, and count the colonies on the plate after culture at 37℃ for 24h. The sample without grafted cellulose fabric is used as the control group. The antibacterial rate calculation formula is calculated by the following equation;

[0049]

[0050] Where: E anti —Antibacterial rate of grafted cellulose fabric; Nc—the number of colonies in the control group; Ne—the number of colonies in the grafted cellulose fabric.

[0051] Washability Test: Referring to GB / T 20944.3-2008, weigh 1g of modified cellulose fabric and wash it five times using the following procedure: water temperature 40°C, bath ratio 1:50, detergent concentration 0.2%, 10 steel balls, and a 45-minute wash cycle. After washing, remove the sample and rinse it twice in 50mL of water at 40°C for 1 minute each. Repeat this procedure for the specified number of washes, then dry the fabric. The antibacterial properties of the antibacterial cellulose fabric after washing were tested.

[0052] Example 1

[0053] A method for effectively grafting chitosan quaternary ammonium salt onto cellulose fabrics based on a dispersed system:

[0054] S1. Synthesis of chitosan quaternary ammonium salt (HTCC)

[0055] 0.2g chitosan (CS) and 10g 1-allyl-3-methylimidazolium chloride [AMIm]Cl ionic liquid were added to a three-necked flask and heated in an 80°C oil bath with stirring until the chitosan was completely dissolved. 0.46g glycidyltrimethylammonium chloride was then added to the flask and stirred at 80°C for 8 hours. An ethanol / acetone mixture was then added to the flask to precipitate HTCC. The mixture was filtered to obtain an HTCC filter cake, which was then washed three times with an ethanol / acetone mixture to remove residual [AMIm]Cl ionic liquid and glycidyltrimethylammonium chloride. Finally, the HTCC was dried in a 70°C oven for 12 hours.

[0056] S2. Preparation of active chitosan quaternary ammonium salt solution

[0057] Place 0.4g of HTCC in a flask, add 20mL of deionized water, and stir at 0°C until completely dissolved. Cool 10mL of deionized water to 0°C in a beaker, then add 0.9g of cyanuric chloride and 0.27g of octadecyltrimethylammonium chloride. Homogenize and disperse the mixture at 3000rpm for 10 minutes. Once dispersed, add the mixture to the flask. Dissolve 1.06g of sodium carbonate in 10mL of deionized water and drip into the flask at a rate of 10mL / h using a syringe pump. Allow to react at 0°C for 3 hours to obtain an active chitosan quaternary ammonium salt solution.

[0058] S3. Preparation of active chitosan quaternary ammonium salt modified cellulose fabric

[0059] Weigh 2g of cotton cloth, add 0.25g of sodium carbonate, 40mL of deionized water, and 10mL of active chitosan quaternary ammonium salt solution to a conical flask at a bath ratio of 1:25. Place the conical flask in a shaking water bath at 50°C for 4 hours, then remove the active chitosan quaternary ammonium salt-modified cellulose fabric, wash it with water, and dry it in an oven.

[0060] Example 2

[0061] The 0.27 g of octadecyltrimethylammonium chloride in step S2 of Example 1 was adjusted to 0.135 g of octadecyltrimethylammonium chloride and 0.135 g of N-dodecyl-2-pyrrolidone. The other conditions were the same as those in Example 1.

[0062] Example 3

[0063] The 0.27 g of octadecyltrimethylammonium chloride in step S2 of Example 1 was adjusted to 0.27 g of N-dodecyl-2-pyrrolidone, and the other conditions were the same as those in Example 1.

[0064] Example 4:

[0065] The 0.9 g of cyanuric chloride in step S2 of Example 1 was adjusted to 0.75 g of 2,4-dichloro-1,3,5-triazine, and the other conditions were the same as those in Example 1.

[0066] Example 5

[0067] The 0.9 g of cyanuric chloride in step S2 of Example 1 was adjusted to 0.9 g of 3,4,6-trichloropyridazine, and the other conditions were the same as those in Example 1.

[0068] Example 6

[0069] The cotton fabric in step S3 of Example 1 was replaced with viscose fabric, and the other conditions were the same as those of Example 1.

[0070] Example 7

[0071] The cotton fabric in step S3 of Example 1 was changed to lyocell fabric, and the other conditions were the same as those of Example 1.

[0072] The grafting rate of the active chitosan quaternary ammonium salt modified cellulose fabrics prepared in Examples 1-7 was tested. The grafting rates are shown in Table 1. The grafting rate of the active chitosan quaternary ammonium salt modified cellulose fabrics can reach up to 3.69%.

[0073] Table 1 Grafting rate of modified cellulose fabric

[0074] Example 1 2 3 4 5 6 7 Grafting rate / % 3.69 3.55 3.28 2.98 2.88 3.04 3.47

[0075] The active chitosan quaternary ammonium salt modified cellulose fabrics prepared in Examples 1-7 were dyed with the natural dye Sophora japonica. The K / S values ​​are shown in Table 2. The K / S of the active chitosan quaternary ammonium salt modified cellulose fabrics dyed with the natural dye Sophora japonica can reach up to 9.47.

[0076] Table 2 K / S values ​​of modified cellulose fabrics dyed with natural dyes

[0077] Example 1 2 3 4 5 6 7 K / S value 9.47 8.91 8.55 8.07 7.89 8.88 9.15

[0078] The reactive chitosan quaternary ammonium salt modified cellulose fabrics prepared in Examples 1-7 were dyed with reactive dyes for low salt, and the K / S values ​​were shown in Table 3. The K / S values ​​of the reactive chitosan quaternary ammonium salt modified cellulose fabrics for low salt dyeing with reactive dyes can reach up to 19.86.

[0079] Table 3 K / S values ​​of reactive dyes with low salt content for modified cellulose fabrics

[0080] Comparative Example 1 2 3 4 5 6 7 K / S value 19.86 18.11 17.72 16.65 16.33 18.69 18.91

[0081] The active chitosan quaternary ammonium salt modified cellulose fabrics prepared in Examples 1-7 were soaped for 5, 10, 15, 20, 25, and 30 washing cycles (5 soaping cycles per cycle), and then the antibacterial performance was tested. The relationship between the antibacterial rate against Escherichia coli and Staphylococcus aureus and the number of washing cycles is shown in Tables 4 and 5. The antibacterial rate of the active chitosan quaternary ammonium salt modified cellulose fabric against Escherichia coli and Staphylococcus aureus remained above 99% after 30 washing cycles.

[0082] Table 4 Relationship between the antibacterial rate of modified cellulose fabrics against Escherichia coli and the number of washing cycles

[0083]

[0084] Table 5 Relationship between the antibacterial rate of modified cellulose fabrics against Staphylococcus aureus and the number of washing cycles

[0085]

[0086]

[0087] Comparative Example 1

[0088] The 1-allyl-3-methylimidazolium chloride [AMIm]Cl ionic liquid in step S1 of Example 2 was adjusted to isopropanol, and the other conditions were the same as those in Example 2.

[0089] Comparative Example 2

[0090] The step of adding a dispersant for homogeneous dispersion in step S2 of Example 2 was removed, and the remaining conditions were the same as those of Example 2.

[0091] Comparative Example 3

[0092] The 0.135 g of octadecyltrimethylammonium chloride and 0.135 g of N-dodecyl-2-pyrrolidone in step S2 of Example 2 were adjusted to 0.37 g of sodium lauryl sulfate, and the other conditions were the same as those in Example 2.

[0093] As shown in Tables 6-10 below, after the dispersant in Example 2 was replaced with the conventional dispersant sodium lauryl sulfate, the grafting rate, K / S value and antibacterial effect of the modified cellulose fabric were significantly reduced.

[0094] Comparative Example 4

[0095] The homogenization dispersion time in step S2 of Example 2 was adjusted from 10 min to 5 min, and the other conditions were the same as those of Example 2.

[0096] Comparative Example 5

[0097] The acid binding agent sodium carbonate in step S2 of Example 2 was adjusted to sodium hydroxide, and the other conditions were consistent with those of Example 2.

[0098] Comparative Example 6

[0099] The reaction time of 3 h in step S2 of Example 2 was adjusted to 1 h, and the other conditions were the same as those of Example 2.

[0100] Comparative Example 7

[0101] The bath ratio of the cellulose fabric to the modified solution in step S3 of Example 2 was adjusted from 1:25 to 1:50, and the other conditions were the same as those in Example 2.

[0102] Comparative Example 8

[0103] The reaction temperature in step S3 of Example 2 was adjusted from 50° C. to 40° C., and the other conditions were the same as those in Example 2.

[0104] Comparative Example 9

[0105] The reaction temperature in step S3 of Example 2 was adjusted from 4 h to 3 h, and the other conditions were the same as those in Example 2.

[0106] The grafting rate of the active chitosan quaternary ammonium salt modified cellulose fabrics prepared in Comparative Examples 1-9 was tested, and the grafting rates are shown in Table 6. Compared with the examples, the grafting rates are only 1% to 2%.

[0107] Table 6 Grafting rate of modified cellulose fabric

[0108] Comparative Example 1 2 3 4 5 6 7 8 9 Grafting rate / % 1.85 1.39 1.45 1.81 1.52 1.49 1.75 1.59 1.68

[0109] The active chitosan quaternary ammonium salt modified cellulose fabrics prepared in Comparative Examples 1-9 were dyed using the natural dye Sophora japonica. The K / S values ​​are shown in Table 7, which are lower than those in Example 7. The highest K / S of the active chitosan quaternary ammonium salt modified cellulose fabric dyed with the natural dye Sophora japonica was only 6.43.

[0110] Table 7 K / S values ​​of modified cellulose fabrics dyed with natural dyes

[0111] Comparative Example 1 2 3 4 5 6 7 8 9 K / S value 6.43 3.54 3.88 5.99 4.12 3.87 5.35 4.98 4.57

[0112] The reactive chitosan quaternary ammonium salt modified cellulose fabrics prepared in Comparative Examples 1-9 were dyed with reactive dyes for low salt. The K / S values ​​are shown in Table 8, which are lower than those in the examples. The highest K / S value of the reactive chitosan quaternary ammonium salt modified cellulose fabrics for low salt dyeing with reactive dyes is only 13.45.

[0113] Table 8 K / S value of modified cellulose fabric with reactive dyes low salt dyeing

[0114] Comparative Example 1 2 3 4 5 6 7 8 9 K / S value 13.45 7.37 7.98 12.68 8.19 8.74 11.92 9.75 10.77

[0115] The modified cellulose fabric with reactive chitosan quaternary ammonium salt prepared in Comparative Examples 1-9 was subjected to 5, 10, 15, 20, 25, 30 washing cycles (5 times of soaping for each cycle), and then subjected to antibacterial performance test. The relationship between the antibacterial rate of the modified cellulose fabric against E. coli and S. aureus and the number of washing cycles is shown in Tables 9 and 10. Compared with the examples, the antibacterial rate of the modified cellulose fabric with reactive chitosan quaternary ammonium salt against E. coli and S. aureus decreased significantly, and the highest was only 94.5% and 90.5%. After 30 washing cycles, the antibacterial rate decreased to 89.5% and 75.8%.

[0116] Table 9 Relationship between the antibacterial rate of the modified cellulose fabric against E. coli and the number of washing cycles

[0117]

[0118] Table 10 Relationship between the antibacterial rate of the modified cellulose fabric against S. aureus and the number of washing cycles

[0119]

[0120]

[0121] The examples provided above are not intended to limit the scope of the present application, and the described steps are not intended to limit the execution order thereof. Those skilled in the art can make obvious improvements to the present application in combination with the existing common knowledge, which also falls within the protection scope defined by the claims of the present application.

Claims

1. A method for preparing active chitosan quaternary ammonium salt modified cellulose fabric based on a dispersion system, characterized in that: The following steps are involved: S1. Synthesis of chitosan quaternary ammonium salt: chitosan and glycidyltrimethylammonium chloride are dissolved in an ionic liquid, and chitosan quaternary ammonium salt is prepared by a homogeneous reaction; S2, preparation of active chitosan quaternary ammonium salt solution: homogeneously dispersing a nitrogen-containing heterocyclic monomer and a dispersant in water, mixing the dispersed monomer with the chitosan quaternary ammonium salt prepared in step S1, and then adding an acid binding agent for reaction to obtain an active chitosan quaternary ammonium salt solution; the dispersant is one or a combination of octadecyltrimethylammonium chloride and N-dodecyl-2-pyrrolidone; the nitrogen-containing heterocyclic monomer is one or more of cyanuric chloride, 2,4-dichloro-1,3,5-triazine, 3,4,6-trichloropyridazine, and 2-amino-4,6-dichloro-1,3,5-triazine; and the acid binding agent is a 0.1-0.2 g / mL sodium carbonate solution; S3. Preparation of active chitosan quaternary ammonium salt modified cellulose fabric: the active chitosan quaternary ammonium salt solution prepared in step S2, cellulose fabric and sodium carbonate are mixed in deionized water, shaken, and active chitosan quaternary ammonium salt modified cellulose fabric is prepared by nucleophilic reaction.

2. The method according to claim 1, wherein In step S1, the ionic liquid is 1-allyl-3-methylimidazolium chloride [AMIm]Cl ionic liquid, and the molecular weight of the chitosan quaternary ammonium salt is 3000-5000.

3. The method according to claim 1, wherein In step S1, the reaction temperature is 70-90° C., the reaction time is 7-9 hours, and the mass ratio of chitosan, ionic liquid and glycidyltrimethylammonium chloride is 1:(40-60):(2-3).

4. The method according to claim 1, wherein In step S2, the homogeneous dispersion temperature is 0-5°C, the homogeneous dispersion time is 5-10 minutes, the homogeneous dispersion speed is 1000-5000 rpm, the mass ratio of chitosan quaternary ammonium salt, nitrogen-containing heterocyclic monomer and dispersant is 4:(7.5-17.35):(2-3); the volume mass ratio of the added amount of acid binding agent to the chitosan quaternary ammonium salt is (20-25):1 mL / g, the reaction temperature is 0-5°C, and the reaction time is 1-3 hours.

5. The method according to claim 1, wherein In step S3, the cellulose fabric is one of cotton fabric, viscose fabric and lyocell fabric.

6. The method according to claim 1, wherein In step S3, the bath ratio of the nucleophilic reaction is 1:(20-30), the reaction temperature is 30-50°C, the reaction time is 2-4 hours, the volume mass ratio of the active chitosan quaternary ammonium salt solution to the cellulose fabric is (4-6):1 mL / g, and the mass ratio of sodium carbonate to the cellulose fabric is 1:(3-5).

7. The active chitosan quaternary ammonium salt modified cellulose fabric prepared according to the method described in any one of claims 1 to 6.

8. Use of the active chitosan quaternary ammonium salt modified cellulose fabric according to claim 7 in the fields of functional textiles and textile dyeing.

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