Printing and dyeing process of multicolor cloth

Abstract

The invention relates to the technical field of textile dyeing, and discloses a multi-color cloth printing and dyeing process which comprises the following steps: soaking cotton cloth in a hydrogen peroxide solution for 30-40 minutes, taking out, washing and drying to obtain pretreated cotton cloth; placing the pretreated cotton cloth in the modification liquid, soaking at 45-55 DEG C for 10-15 minutes, taking out, washing and drying to obtain modified cotton cloth; mixing sodium chloride, a leveling agent, a dispersing agent, a reactive dye, a disperse dye and deionized water to obtain dye liquor, putting the modified cotton cloth into the dye liquor, dyeing, taking out, washing and drying to obtain the multicolor cloth. According to the present invention, the inner cavity of the beta-cyclodextrin in the composite amphoteric cellulose porous microspheres is occupied by the disperse dye, and after the cotton cloth is treated by the modification liquid, the dyes with different colors are dyed so as to adhere the dyes with different colors to the surface of the cloth, such that the multi-color dyeing is achieved, the high dye uptake and the high color fastness are provided, and the dyeing is uniform.

Description

Technical Field

[0001] The present invention relates to the technical field of textile dyeing, and specifically to a printing and dyeing process for multi-color fabrics. Background Art

[0002] Colorful or vividly layered fabrics have a worn texture, bringing a strong visual impact and aesthetic feeling. Colorful or vividly layered clothing can achieve an ideal effect through the water washing and dyeing process. The fabrics obtained by the water washing and dyeing process are more natural, comfortable, layered, and have better fabric stability. Among them, the existing water washing and dyeing process uses a process of dyeing first and then water washing to complete the dyeing of different dyes. However, water washing requires a large amount of water resources, and the binding force between the dye and the fiber fabric is poor, resulting in poor dyeing effect of the fabric and poor color layering, which cannot meet people's needs.

[0003] Dyeing fiber fabrics using the two-bath method or multi-bath method can adhere different dyes to the fiber fabrics to complete multi-color dyeing. However, during the dyeing process, it is necessary to discharge the used waste dye liquor twice or multiple times, and multiple water washes are also required, increasing the water consumption cost and wastewater treatment cost. In addition, reactive dyes are anionic dyes. During the dyeing process, the negatively charged reactive dyes will have a repulsive force with the negative charges on the surface of the fiber fabric, reducing the binding rate of the dye to the fiber and resulting in low dye uptake rate and color fastness of the reactive dyes. Summary of the Invention

[0004] The present invention provides a printing and dyeing process for multi-color fabrics, which solves the problems of poor binding force between the dye and the fiber fabric, resulting in poor dyeing effect and uneven dyeing.

[0005] The technical solution of the present invention:

[0006] A printing and dyeing process for multi-color fabrics, comprising the following steps:

[0007] S1. Immerse the cotton fabric in a hydrogen peroxide solution for 30 - 40 min, take it out, wash, and dry to obtain a pretreated cotton fabric;

[0008] S2. Immerse the pretreated cotton fabric in a modification solution at 45 - 55 °C for 10 - 15 min, take it out, wash, and dry to obtain a modified cotton fabric;

[0009] S3. Mix sodium chloride, leveling agent, dispersant, reactive dye, disperse dye, and deionized water to obtain a dyeing solution. Immerse the modified cotton fabric in the dyeing solution, take it out after dyeing, wash, and dry to obtain a multi-color fabric;

[0010] The modification solution is obtained by mixing composite amphoteric cellulose porous microspheres, ethanol, coupling agent, and deionized water;

[0011] The composite amphoteric cellulose porous microspheres are obtained by reacting amphoteric cellulose porous microspheres, β-cyclodextrin, epichlorohydrin and quaternary ammonium salt of chitosan;

[0012] The amphoteric cellulose porous microspheres are obtained by reacting cellulose microspheres with citric acid, glutaraldehyde and triethylenetetramine.

[0013] Furthermore, in step S1, the mass ratio of the cotton fabric to the hydrogen peroxide solution is (5 - 10):(80 - 120).

[0014] Furthermore, in step S1, the mass fraction of the hydrogen peroxide solution is 4 - 5%.

[0015] Furthermore, in step S2, the mass ratio of the pretreated cotton fabric to the modification liquid is (5 - 10):(60 - 80).

[0016] Furthermore, in step S3, the mass ratio of sodium chloride, leveling agent, dispersant, reactive dye, disperse dye and deionized water is (1.5 - 2.5):(0.1 - 0.2):(0.1 - 0.2):(2 - 3):(2 - 3):(100 - 110).

[0017] Furthermore, in step S3, the dyeing bath ratio is 1:(90 - 100), the dyeing temperature is 40 - 50 °C, and the dyeing time is 30 - 50 min.

[0018] Furthermore, the leveling agent is fatty alcohol polyoxyethylene ether.

[0019] Furthermore, the dispersant is selected from sodium dodecyl sulfate or sodium dodecylbenzenesulfonate.

[0020] Furthermore, the reactive dye is selected from reactive red X-3B.

[0021] Furthermore, the disperse dye is selected from any one of disperse brilliant blue E-4R, disperse red E-4B and disperse blue 2BLN.

[0022] Furthermore, the modification liquid is specifically prepared by the following steps:

[0023] A1. Add the amphoteric cellulose porous microspheres into the sodium hydroxide solution, stir evenly, add β-cyclodextrin, continue stirring, then add epichlorohydrin, and stir and react at 40 - 50 °C for 4 - 5 h. After filtration, washing and drying, a solid is obtained;

[0024] A2. Add the quaternary ammonium salt of chitosan into deionized water, stir evenly, add the solid, and stir at 60 - 70 °C for 30 - 40 min. After filtration, washing and drying, the composite amphoteric cellulose porous microspheres are obtained;

[0025] A3. Mix ethanol, coupling agent and deionized water, stir evenly, add composite amphoteric cellulose porous microspheres, and stir at 600 - 700 r / min for 20 - 30 min to obtain a modified solution.

[0026] Further, during the above A1 reaction process, the chlorine atoms contained in epichlorohydrin can react with the carboxyl groups of the amphoteric cellulose porous microspheres, and the epoxy groups of epichlorohydrin can undergo a ring-opening reaction with the hydroxyl groups of β-cyclodextrin, enabling β-cyclodextrin to be grafted onto the amphoteric cellulose porous microspheres to obtain a solid.

[0027] Further, during the above A2 reaction process, the amino groups and the hydroxyl groups generated by ring-opening contained in the solid microspheres can be chemically bonded with chitosan quaternary ammonium salt, enabling chitosan quaternary ammonium salt to be grafted onto the modified amphoteric cellulose porous microspheres to form composite amphoteric cellulose porous microspheres.

[0028] Further, during the above A3 reaction process, the hydroxyl groups generated by the hydrolysis of the coupling agent can be chemically bonded with the composite amphoteric cellulose porous microspheres, enabling the composite amphoteric cellulose porous microspheres to be evenly dispersed in the modified solution.

[0029] Further, in step A1, the dosage ratio of the amphoteric cellulose porous microspheres, sodium hydroxide solution, β-cyclodextrin and epichlorohydrin is (3 - 5) g : (90 - 110) mL : (1.1 - 1.3) g : (1 - 3) mL.

[0030] Further, in step A2, the dosage ratio of the chitosan quaternary ammonium salt, deionized water and the solid is (2 - 3) g : (45 - 55) mL : (5 - 6) g.

[0031] Further, in step A3, the dosage ratio of the ethanol, coupling agent, deionized water and the composite amphoteric cellulose porous microspheres is (65 - 75) mL : (2.2 - 2.6) g : (8 - 12) mL : (8 - 12) g.

[0032] Further, the coupling agent is KH550.

[0033] Further, the amphoteric cellulose porous microspheres are specifically prepared by the following steps:

[0034] B1. Add cellulose microspheres to deionized water, stir evenly, add citric acid and trisodium citrate, ultrasonicate at 40 - 60 KHz for 20 - 30 min, stir at 75 - 85 °C for 6 - 8 h, stir and react at 115 - 125 °C for 4 - 5 h, cool to room temperature, filter, wash, and dry to obtain carboxylated cellulose microspheres;

[0035] B2. Add carboxylated cellulose microspheres to a mixed solution of glutaraldehyde and triethylenetetramine, ultrasonicate at 40 - 60 KHz for 20 - 30 min, react at 55 - 65 °C for 0.5 - 1.5 h, cool to room temperature, filter, wash, and dry to obtain amphoteric cellulose porous microspheres.

[0036] Furthermore, during the above B1 reaction process, the hydroxyl groups on the cellulose microspheres can undergo an esterification reaction with the carboxyl groups of citric acid to form a dense pore structure. After stirring at 75 - 85 °C, the water molecules inside the cellulose microspheres are removed, and a pore structure is formed inside the cellulose microspheres to complete the carboxylated modified cellulose porous microspheres.

[0037] Furthermore, during the above B2 reaction process, glutaraldehyde acts as a linker and can react with the hydroxyl groups contained in the carboxylated modified cellulose porous microspheres and the amino groups of triethylenetetramine, enabling triethylenetetramine to graft onto the carboxylated modified cellulose porous microspheres to obtain amphoteric cellulose porous microspheres.

[0038] Furthermore, in step B1, the dosage ratio of the cellulose microspheres, deionized water, citric acid, and trisodium citrate is (8 - 12) g : (18 - 22) mL : (3 - 5) g : (1 - 2) g.

[0039] Furthermore, in step B2, the mass ratio of the carboxylated cellulose microspheres, glutaraldehyde, and triethylenetetramine is (8 - 12) : (6 - 8) : (1 - 3).

[0040] The present invention has the following beneficial effects:

[0041] (1) In the technical solution of the present invention, the cellulose microspheres react with citric acid, glutaraldehyde, and triethylenetetramine to form amphoteric cellulose porous microspheres. On the one hand, the carboxyl groups contained in the amphoteric cellulose porous microspheres are beneficial for β - cyclodextrin to graft onto the amphoteric cellulose porous microspheres, improving the adsorption of disperse dyes. And the amine groups contained in the amphoteric cellulose porous microspheres serve as chitosan reaction sites, improving the adsorption of reactive dyes. On the other hand, the formed amphoteric cellulose porous microspheres have a high porosity and specific surface area, improving the adsorption of dyes. And the amphoteric cellulose porous microspheres have a high cross - link density, showing excellent mechanical properties and thermal stability. When coated on the fabric surface, it improves the rubbing fastness and soaping fastness of the fabric to dyes.

[0042] (2) In the technical solution of the present invention, β-cyclodextrin is grafted onto the amphoteric cellulose porous microspheres through epichlorohydrin. On the one hand, the inner cavity of β-cyclodextrin is hydrophobic and the outside is hydrophilic, which can form an inclusion complex with disperse dyes through hydrophobic interaction, enabling the disperse dyes to be adsorbed on the fabric, thereby achieving the adhesion of the disperse dyes to the fabric. On the other hand, the inclusion of the disperse dyes in the inner cavity structure of β-cyclodextrin replaces the dispersant with β-cyclodextrin to complete the adsorption of the disperse dyes, avoiding the damage to the reactive dyes caused by adding the dispersant and increasing the dyeing rate of the disperse dyes on the fabric.

[0043] (3) In the technical solution of the present invention, chitosan quaternary ammonium salt is grafted onto the amphoteric cellulose porous microspheres to form composite amphoteric cellulose porous microspheres. On the one hand, chitosan quaternary ammonium salt itself has strong adsorption for reactive dyes, adhering the reactive dyes to the surface of the fabric. Chitosan quaternary ammonium salt can introduce more cationic groups and coat on the surface of the fabric, reducing the negative electrical properties of the fiber fabric surface, and then adhering the reactive dyes to the surface of the fiber fabric through electrostatic attraction, thereby realizing the dyeing of the fiber fabric with reactive dyes. On the other hand, the inner cavity of β-cyclodextrin in the composite amphoteric cellulose porous microspheres is occupied by disperse dyes, and chitosan adsorbs the reactive dyes, enabling dyes of different colors to adhere to the surface of the fabric, achieving multi-color dyeing, having a high dyeing rate and color fastness, and the dyeing is uniform.

[0044] (4) In the technical solution of the present invention, the composite amphoteric cellulose porous microspheres, ethanol, coupling agent and deionized water are mixed to form a modified liquid. Among them, a large number of silanol groups are presented on the surface of the fiber fabric by the coupling agent, and the composite amphoteric cellulose porous microspheres combine with the silanol groups, enabling the composite amphoteric cellulose porous microspheres to be evenly distributed on the surface of the fiber fabric, improving the dyeing rate and uniformity of the dyes; through one-bath one-step dyeing, the fabric can be dyed with different dyes. The dyeing process of this method is simple, the dyeing time is short, the efficiency is high, the energy consumption is less, and the amount of wastewater discharged is small. Specific embodiments

[0045] Next, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the 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 belong to the scope of protection of the present invention.

[0046] The raw materials used in the embodiments of the present invention are as follows, and all the reagents used are of analytical grade.

[0047] Among them, the leveling agent is fatty alcohol polyoxyethylene ether.

[0048] The dispersant is sodium dodecyl sulfate.

[0049] The disperse dye is Disperse Brilliant Blue E-4R, and the reactive dye is selected from Reactive Red X-3B.

[0050] The cotton fabric has a specification of C 32X32 and is purchased from Qingdao Coast Textile Co., Ltd.

[0051] The quaternary ammonium salt of chitosan is hydroxypropyltrimethylammonium chloride chitosan and is purchased from Guangdong Mingcheng Biotechnology Co., Ltd.

[0052] The coupling agent is KH550.

[0053] The cotton is purchased from Zhejiang Specialties Group Tiandi Cotton Co., Ltd.

[0054] The cellulose microspheres are specifically prepared by the following steps:

[0055] Mix 7 g of sodium hydroxide, 12 g of urea and 80 mL of deionized water, stir evenly, add 3 g of cotton, stir at 330 r / min for 18 min to obtain a cellulose solution, add the cellulose solution to 20 mL of sulfuric acid solution with a concentration of 1 mol / L and 20 mL of sodium sulfate solution with a concentration of 80 g / L, stir at 25 °C for 8 h for solidification and molding, then take out and wash 3 times with deionized water to obtain cellulose microspheres.

[0056] Example 1

[0057] A printing and dyeing process for multi-color fabrics includes the following steps:

[0058] S1. Immerse the cotton fabric in a hydrogen peroxide solution with a mass fraction of 4% for 30 min, take out, wash 3 times with deionized water, and dry in an oven at 70 °C for 15 min to obtain a pretreated cotton fabric;

[0059] S2. Immerse the pretreated cotton fabric in the modification liquid at 45 °C for 10 min, take out, wash 3 times with deionized water, and dry in an oven at 70 °C for 15 min to obtain a modified cotton fabric;

[0060] S3. Mix sodium chloride, fatty alcohol polyoxyethylene ether, sodium dodecyl sulfate, Reactive Red X-3B, Disperse Brilliant Blue E-4R and deionized water to obtain a dyeing solution, immerse the modified cotton fabric in the dyeing solution, after dyeing, take out, wash 3 times with deionized water, and dry in an oven at 70 °C for 15 min to obtain a multi-color fabric;

[0061] Among them, in step S1, the mass ratio of the cotton fabric to the hydrogen peroxide solution is 5:80;

[0062] In step S2, the mass ratio of the pretreated cotton fabric to the modification liquid is 5:60;

[0063] In step S3, the mass ratio of sodium chloride, fatty alcohol polyoxyethylene ether, sodium dodecyl sulfate, reactive red X-3B, disperse brilliant blue E-4R and deionized water is 1.5:0.1:0.1:2:2:100;

[0064] In step S3, the dyeing bath ratio is 1:90, the dyeing temperature is 40 °C, and the dyeing time is 30 min.

[0065] The modified liquid is specifically prepared by the following steps:

[0066] A1. Add 3 g of amphoteric cellulose porous microspheres to 90 mL of a 5% sodium hydroxide solution by mass, stir evenly, add 1.1 g of β-cyclodextrin, continue to stir for 30 min, then add 1 mL of epichlorohydrin, stir and react at 40 °C for 4 h, filter, wash with deionized water 3 times, and dry in an oven at 70 °C for 10 min to obtain a solid;

[0067] A2. Add 2 g of hydroxypropyltrimethylammonium chloride chitosan to 45 mL of deionized water, stir evenly, add 5 g of the solid, stir at 60 °C for 30 min, filter, wash with deionized water 3 times, and dry in an oven at 70 °C for 10 min to obtain composite amphoteric cellulose porous microspheres;

[0068] A3. Mix 65 mL of ethanol, 2.2 g of KH550 and 8 mL of deionized water, stir evenly, add 8 g of composite amphoteric cellulose porous microspheres, and stir at 600 r / min for 20 min to obtain the modified liquid.

[0069] The amphoteric cellulose porous microspheres are specifically prepared by the following steps:

[0070] B1. Add 8 g of cellulose microspheres to 18 mL of deionized water, stir evenly, add 3 g of citric acid and 1 g of trisodium citrate, ultrasonically treat at 40 kHz for 20 min, stir at 75 °C for 6 h until the water evaporates, stir and react at 115 °C for 4 h, cool to room temperature, filter, wash with deionized water 3 times, and dry in an oven at 70 °C for 10 min to obtain carboxylated cellulose microspheres;

[0071] B2. Add 8 g of carboxylated cellulose microspheres to a mixed solution of 6 g of glutaraldehyde and 1 g of triethylenetetramine, ultrasonically treat at 40 kHz for 20 min, react at 55 °C for 0.5 h, cool to room temperature, filter, wash with deionized water 3 times, and dry in an oven at 70 °C for 10 min to obtain amphoteric cellulose porous microspheres.

[0072] Example 2

[0073] A printing and dyeing process for multi-color fabrics includes the following steps:

[0074] S1. Immerse the cotton fabric in a hydrogen peroxide solution with a mass fraction of 4.5% for 35 min, take it out, wash it 3 times with deionized water, and dry it in an oven at 70 °C for 15 min to obtain the pretreated cotton fabric;

[0075] S2. Place the pretreated cotton fabric in the modification solution, soak it at 50 °C for 13 min, take it out, wash it 3 times with deionized water, and dry it in an oven at 70 °C for 15 min to obtain the modified cotton fabric;

[0076] S3. Mix sodium chloride, fatty alcohol polyoxyethylene ether, sodium dodecyl sulfate, reactive red X-3B, disperse brilliant blue E-4R and deionized water to obtain a dyeing solution. Place the modified cotton fabric in the dyeing solution, after dyeing, take it out, wash it 3 times with deionized water, and dry it in an oven at 70 °C for 15 min to obtain a multi-color fabric;

[0077] Among them, in step S1, the mass ratio of the cotton fabric to the hydrogen peroxide solution is 8:100;

[0078] In step S2, the mass ratio of the pretreated cotton fabric to the modification solution is 8:70;

[0079] In step S3, the mass ratio of sodium chloride, fatty alcohol polyoxyethylene ether, sodium dodecyl sulfate, reactive red X-3B, disperse brilliant blue E-4R and deionized water is 2:0.15:0.15:2.5:2.5:105;

[0080] In step S3, the dyeing bath ratio is 1:95, the dyeing temperature is 45 °C, and the dyeing time is 40 min.

[0081] The modification solution is specifically prepared by the following steps:

[0082] A1. Add 4 g of amphoteric cellulose porous microspheres to 100 mL of a sodium hydroxide solution with a mass fraction of 5%, stir evenly, add 1.2 g of β-cyclodextrin, continue to stir for 30 min, then add 2 mL of epichlorohydrin, stir and react at 45 °C for 4.5 h, filter, wash 3 times with deionized water, and dry in an oven at 70 °C for 10 min to obtain a solid;

[0083] A2. Add 2.6 g of hydroxypropyltrimethylammonium chloride chitosan to 50 mL of deionized water, stir evenly, add 5.5 g of the solid, stir at 65 °C for 30 - 40 min, filter, wash 3 times with deionized water, and dry in an oven at 70 °C for 10 min to obtain composite amphoteric cellulose porous microspheres;

[0084] A3. Mix 70 mL of ethanol, 2.4 g of KH550 and 10 mL of deionized water, stir evenly, add 10 g of composite amphoteric cellulose porous microspheres, and stir at 650 r / min for 25 min to obtain the modification solution.

[0085] The amphoteric cellulose porous microspheres are specifically prepared by the following steps:

[0086] B1. Add 10 g of cellulose microspheres to 20 mL of deionized water, stir evenly, add 4 g of citric acid and 1.5 g of trisodium citrate, ultrasonicate at 50 KHz for 25 min, stir at 80 °C for 7 h until the water evaporates, stir and react at 120 °C for 4.5 h, cool to room temperature, filter, wash with deionized water 3 times, and dry in an oven at 70 °C for 10 min to obtain carboxylated cellulose microspheres;

[0087] B2. Add 10 g of carboxylated cellulose microspheres to a mixed solution of 7 g of glutaraldehyde and 2 g of triethylenetetramine, ultrasonicate at 50 KHz for 25 min, react at 60 °C for 1 h, cool to room temperature, filter, wash with deionized water 3 times, and dry in an oven at 70 °C for 10 min to obtain amphoteric cellulose porous microspheres.

[0088] Example 3

[0089] A printing and dyeing process for multi-color fabrics includes the following steps:

[0090] S1. Immerse the cotton fabric in a 5% hydrogen peroxide solution for 40 min, take it out, wash it 3 times with deionized water, and dry it in an oven at 70 °C for 15 min to obtain a pretreated cotton fabric;

[0091] S2. Immerse the pretreated cotton fabric in the modification solution, soak it at 55 °C for 15 min, take it out, wash it 3 times with deionized water, and dry it in an oven at 70 °C for 15 min to obtain a modified cotton fabric;

[0092] S3. Mix sodium chloride, fatty alcohol polyoxyethylene ether, sodium dodecyl sulfate, reactive red X-3B, disperse brilliant blue E-4R and deionized water to obtain a dyeing solution. Immerse the modified cotton fabric in the dyeing solution, after dyeing, take it out, wash it 3 times with deionized water, and dry it in an oven at 70 °C for 15 min to obtain a multi-color fabric;

[0093] Among them, in step S1, the mass ratio of the cotton fabric to the hydrogen peroxide solution is 10:120;

[0094] In step S2, the mass ratio of the pretreated cotton fabric to the modification solution is 10:80;

[0095] In step S3, the mass ratio of sodium chloride, fatty alcohol polyoxyethylene ether, sodium dodecyl sulfate, reactive red X-3B, disperse brilliant blue E-4R and deionized water is 2.5:0.2:0.2:3:3:110;

[0096] In step S3, the dyeing bath ratio is 1:100, the dyeing temperature is 50 °C, and the dyeing time is 50 min.

[0097] The modified liquid is specifically prepared by the following steps:

[0098] A1. Add 5 g of amphoteric cellulose porous microspheres to 110 mL of a sodium hydroxide solution with a mass fraction of 5%, stir evenly, add 1.3 g of β-cyclodextrin, continue to stir for 30 min, then add 3 mL of epichlorohydrin, stir and react at 50 °C for 5 h, filter, wash with deionized water 3 times, and dry in an oven at 70 °C for 10 min to obtain a solid;

[0099] A2. Add 3 g of hydroxypropyltrimethylammonium chloride chitosan to 55 mL of deionized water, stir evenly, add 6 g of the solid, stir at 70 °C for 40 min, filter, wash with deionized water 3 times, and dry in an oven at 70 °C for 10 min to obtain composite amphoteric cellulose porous microspheres;

[0100] A3. Mix 75 mL of ethanol, 2.6 g of KH550, and 12 mL of deionized water, stir evenly, add 12 g of composite amphoteric cellulose porous microspheres, and stir at 700 r / min for 30 min to obtain the modified liquid.

[0101] The amphoteric cellulose porous microspheres are specifically prepared by the following steps:

[0102] B1. Add 12 g of cellulose microspheres to 22 mL of deionized water, stir evenly, add 5 g of citric acid and 2 g of trisodium citrate, ultrasonicate at 60 KHz for 30 min, stir at 85 °C for 8 h until the water evaporates, stir and react at 125 °C for 5 h, cool to room temperature, filter, wash with deionized water 3 times, and dry in an oven at 70 °C for 10 min to obtain carboxylated cellulose microspheres;

[0103] B2. Add 12 g of carboxylated cellulose microspheres to a mixed solution of 8 g of glutaraldehyde and 3 g of triethylenetetramine, ultrasonicate at 60 KHz for 30 min, react at 65 °C for 1.5 h, cool to room temperature, filter, wash with deionized water 3 times, and dry in an oven at 70 °C for 10 min to obtain amphoteric cellulose porous microspheres.

[0104] Comparative Example 1

[0105] A printing and dyeing process for multi-color fabrics includes the following steps:

[0106] S1. Immerse the cotton fabric in a hydrogen peroxide solution with a mass fraction of 5% for 40 min, take it out, wash it 3 times with deionized water, and dry it in an oven at 70 °C for 15 min to obtain a pretreated cotton fabric;

[0107] S2. Place the pretreated cotton fabric in the modification solution, soak it at 55 °C for 15 min, take it out, wash it 3 times with deionized water, and dry it in an oven at 70 °C for 15 min to obtain the modified cotton fabric;

[0108] S3. Mix sodium chloride, fatty alcohol polyoxyethylene ether, sodium dodecyl sulfate, reactive red X-3B, disperse brilliant blue E-4R and deionized water to obtain a dyeing solution. Place the modified cotton fabric in the dyeing solution, after dyeing, take it out, wash it 3 times with deionized water, and dry it in an oven at 70 °C for 15 min to obtain the multi-color fabric;

[0109] Among them, in step S1, the mass ratio of the cotton fabric to the hydrogen peroxide solution is 10:120;

[0110] In step S2, the mass ratio of the pretreated cotton fabric to the modification solution is 10:80;

[0111] In step S3, the mass ratio of sodium chloride, fatty alcohol polyoxyethylene ether, sodium dodecyl sulfate, reactive red X-3B, disperse brilliant blue E-4R and deionized water is 2.5:0.2:0.2:3:3:110;

[0112] In step S3, the dyeing bath ratio is 1:100, the dyeing temperature is 50 °C, and the dyeing time is 50 min.

[0113] The modification solution is specifically prepared by the following steps:

[0114] A1. Add 3 g of hydroxypropyltrimethylammonium chloride chitosan to 55 mL of deionized water, stir evenly, add 6 g of amphoteric cellulose porous microspheres, stir at 70 °C for 40 min, filter, wash 3 times with deionized water, and dry in an oven at 70 °C for 10 min to obtain composite amphoteric cellulose porous microspheres;

[0115] A2. Mix 75 mL of ethanol, 2.6 g of KH550 and 12 mL of deionized water, stir evenly, add 12 g of composite amphoteric cellulose porous microspheres, and stir at 700 r / min for 30 min to obtain the modification solution.

[0116] The amphoteric cellulose porous microspheres are specifically prepared by the following steps:

[0117] B1. Add 12 g of cellulose microspheres to 22 mL of deionized water, stir evenly, add 5 g of citric acid and 2 g of trisodium citrate, ultrasonicate at 60 KHz for 30 min, stir at 85 °C for 8 h until the water evaporates, stir and react at 125 °C for 5 h, cool to room temperature, filter, wash 3 times with deionized water, and dry in an oven at 70 °C for 10 min to obtain carboxylated cellulose microspheres;

[0118] B2. Add 12 g of carboxylated cellulose microspheres to a mixed solution of 8 g of glutaraldehyde and 3 g of triethylenetetramine, ultrasonicate for 30 min at 60 KHz, react at 65 °C for 1.5 h, cool to room temperature, filter, wash 3 times with deionized water, and dry in an oven at 70 °C for 10 min to obtain amphoteric cellulose porous microspheres.

[0119] Comparative Example 2

[0120] A printing and dyeing process for multi-color fabrics includes the following steps:

[0121] S1. Immerse the cotton fabric in a hydrogen peroxide solution with a mass fraction of 5% for 40 min, take it out, wash 3 times with deionized water, and dry in an oven at 70 °C for 15 min to obtain a pretreated cotton fabric;

[0122] S2. Place the pretreated cotton fabric in the modification solution, soak at 55 °C for 15 min, take it out, wash 3 times with deionized water, and dry in an oven at 70 °C for 15 min to obtain a modified cotton fabric;

[0123] S3. Mix sodium chloride, fatty alcohol polyoxyethylene ether, sodium dodecyl sulfate, reactive red X-3B, disperse brilliant blue E-4R, and deionized water to obtain a dyeing solution. Place the modified cotton fabric in the dyeing solution, after dyeing, take it out, wash 3 times with deionized water, and dry in an oven at 70 °C for 15 min to obtain a multi-color fabric;

[0124] Among them, in step S1, the mass ratio of the cotton fabric to the hydrogen peroxide solution is 10:120;

[0125] In step S2, the mass ratio of the pretreated cotton fabric to the modification solution is 10:80;

[0126] In step S3, the mass ratio of sodium chloride, fatty alcohol polyoxyethylene ether, sodium dodecyl sulfate, reactive red X-3B, disperse brilliant blue E-4R, and deionized water is 2.5:0.2:0.2:3:3:110;

[0127] In step S3, the dyeing bath ratio is 1:100, the dyeing temperature is 50 °C, and the dyeing time is 50 min.

[0128] The modification solution is specifically prepared by the following steps:

[0129] A1. Add 5 g of amphoteric cellulose porous microspheres to 110 mL of a sodium hydroxide solution with a mass fraction of 5%, stir evenly, add 1.3 g of β-cyclodextrin, continue stirring for 30 min, then add 3 mL of epichlorohydrin, stir and react at 50 °C for 5 h, filter, wash 3 times with deionized water, and dry in an oven at 70 °C for 10 min to obtain a solid;

[0130] A2. Mix 75 mL of ethanol, 2.6 g of KH550, and 12 mL of deionized water, stir evenly, add 12 g of solid, and stir at 700 r / min for 30 min to obtain a modified solution.

[0131] The amphoteric cellulose porous microspheres are specifically prepared by the following steps:

[0132] B1. Add 12 g of cellulose microspheres to 22 mL of deionized water, stir evenly, add 5 g of citric acid and 2 g of trisodium citrate, ultrasonicate at 60 KHz for 30 min, stir at 85 °C for 8 h until the water evaporates, stir and react at 125 °C for 5 h, cool to room temperature, filter, wash with deionized water 3 times, and dry in an oven at 70 °C for 10 min to obtain carboxylated cellulose microspheres;

[0133] B2. Add 12 g of carboxylated cellulose microspheres to a mixed solution of 8 g of glutaraldehyde and 3 g of triethylenetetramine, ultrasonicate at 60 KHz for 30 min, react at 65 °C for 1.5 h, cool to room temperature, filter, wash with deionized water 3 times, and dry in an oven at 70 °C for 10 min to obtain amphoteric cellulose porous microspheres.

[0134] Comparative Example 3

[0135] A printing and dyeing process for a multi-color fabric includes the following steps:

[0136] S1. Immerse the cotton fabric in a 5% hydrogen peroxide solution for 40 min, take it out, wash it 3 times with deionized water, and dry it in an oven at 70 °C for 15 min to obtain a pretreated cotton fabric;

[0137] S2. Immerse the pretreated cotton fabric in the modified solution at 55 °C for 15 min, take it out, wash it 3 times with deionized water, and dry it in an oven at 70 °C for 15 min to obtain a modified cotton fabric;

[0138] S3. Mix sodium chloride, fatty alcohol polyoxyethylene ether, sodium dodecyl sulfate, reactive red X-3B, disperse brilliant blue E-4R, and deionized water to obtain a dyeing solution. Immerse the modified cotton fabric in the dyeing solution, after dyeing, take it out, wash it 3 times with deionized water, and dry it in an oven at 70 °C for 15 min to obtain a multi-color fabric;

[0139] Among them, in step S1, the mass ratio of the cotton fabric to the hydrogen peroxide solution is 10:120;

[0140] In step S2, the mass ratio of the pretreated cotton fabric to the modified solution is 10:80;

[0141] In step S3, the mass ratio of sodium chloride, fatty alcohol polyoxyethylene ether, sodium dodecyl sulfate, reactive red X-3B, disperse brilliant blue E-4R and deionized water is 2.5:0.2:0.2:3:3:110;

[0142] In step S3, the dyeing bath ratio is 1:100, the dyeing temperature is 50 °C, and the dyeing time is 50 min.

[0143] The modified liquid is specifically prepared by the following steps:

[0144] A1. Add 5 g of amphoteric cellulose porous microspheres to 110 mL of a sodium hydroxide solution with a mass fraction of 5%, stir evenly, add 1.3 g of β-cyclodextrin, continue to stir for 30 min, then add 3 mL of epichlorohydrin, stir and react at 50 °C for 5 h, filter, wash with deionized water 3 times, and dry in an oven at 70 °C for 10 min to obtain a solid;

[0145] A2. Add 3 g of hydroxypropyltrimethylammonium chloride chitosan to 55 mL of deionized water, stir evenly, add 6 g of the solid, stir at 70 °C for 40 min, filter, wash with deionized water 3 times, and dry in an oven at 70 °C for 10 min to obtain composite amphoteric cellulose porous microspheres;

[0146] A3. Mix 75 mL of ethanol and 12 mL of deionized water, stir evenly, add 12 g of composite amphoteric cellulose porous microspheres, and stir at 700 r / min for 30 min to obtain the modified liquid.

[0147] The amphoteric cellulose porous microspheres are specifically prepared by the following steps:

[0148] B1. Add 12 g of cellulose microspheres to 22 mL of deionized water, stir evenly, add 5 g of citric acid and 2 g of trisodium citrate, ultrasonicate at 60 KHz for 30 min, stir at 85 °C until the water evaporates for 8 h, stir and react at 125 °C for 5 h, cool to room temperature, filter, wash with deionized water 3 times, and dry in an oven at 70 °C for 10 min to obtain carboxylated cellulose microspheres;

[0149] B2. Add 12 g of carboxylated cellulose microspheres to a mixed solution of 8 g of glutaraldehyde and 3 g of triethylenetetramine, ultrasonicate at 60 KHz for 30 min, react at 65 °C for 1.5 h, cool to room temperature, filter, wash with deionized water 3 times, and dry in an oven at 70 °C for 10 min to obtain amphoteric cellulose porous microspheres.

[0150] Comparative Example 4

[0151] A printing and dyeing process for multi-color fabrics includes the following steps:

[0152] S1. Immerse the cotton fabric in a 5% hydrogen peroxide solution for 40 min, take it out, wash it 3 times with deionized water, and dry it in an oven at 70 °C for 15 min to obtain the pretreated cotton fabric;

[0153] S2. Place the pretreated cotton fabric in the modification solution, immerse it at 55 °C for 15 min, take it out, wash it 3 times with deionized water, and dry it in an oven at 70 °C for 15 min to obtain the modified cotton fabric;

[0154] S3. Mix sodium chloride, fatty alcohol polyoxyethylene ether, sodium dodecyl sulfate, reactive red X-3B, disperse brilliant blue E-4R and deionized water to obtain a dyeing solution. Place the modified cotton fabric in the dyeing solution, after dyeing, take it out, wash it 3 times with deionized water, and dry it in an oven at 70 °C for 15 min to obtain the multi-color fabric;

[0155] Among them, in step S1, the mass ratio of the cotton fabric to the hydrogen peroxide solution is 10:120;

[0156] In step S2, the mass ratio of the pretreated cotton fabric to the modification solution is 10:80;

[0157] In step S3, the mass ratio of sodium chloride, fatty alcohol polyoxyethylene ether, sodium dodecyl sulfate, reactive red X-3B, disperse brilliant blue E-4R and deionized water is 2.5:0.2:0.2:3:3:110;

[0158] In step S3, the dyeing bath ratio is 1:100, the dyeing temperature is 50 °C, and the dyeing time is 50 min.

[0159] The modification solution is specifically prepared by the following steps:

[0160] A1. Add 5 g of cellulose porous microspheres to 110 mL of a 5% sodium hydroxide solution, stir evenly, add 1.3 g of β-cyclodextrin, continue to stir for 30 min, then add 3 mL of epichlorohydrin, stir and react at 50 °C for 5 h, filter, wash 3 times with deionized water, and dry in an oven at 70 °C for 10 min to obtain a solid;

[0161] A2. Add 3 g of hydroxypropyltrimethylammonium chloride chitosan to 55 mL of deionized water, stir evenly, add 6 g of the solid, stir at 70 °C for 40 min, filter, wash 3 times with deionized water, and dry in an oven at 70 °C for 10 min to obtain the composite cellulose porous microspheres;

[0162] A3. Mix 75 mL of ethanol, 2.6 g of KH550 and 12 mL of deionized water, stir evenly, add 12 g of cellulose porous microspheres, and stir at 700 r / min for 30 min to obtain the modification solution.

[0163] The cellulose porous microspheres are specifically prepared by the following steps:

[0164] Add 12 g of cellulose microspheres to a mixed solution of 8 g of glutaraldehyde and 3 g of triethylenetetramine, ultrasonicate at 60 KHz for 30 min, react at 65 °C for 1.5 h, cool to room temperature, filter, wash with deionized water 3 times, and dry in an oven at 70 °C for 10 min to obtain cellulose porous microspheres.

[0165] Comparative Example 5

[0166] A printing and dyeing process for multi-color fabrics includes the following steps:

[0167] S1. Immerse the cotton fabric in a hydrogen peroxide solution with a mass fraction of 5% for 40 min, take it out, wash it 3 times with deionized water, and dry it in an oven at 70 °C for 15 min to obtain a pretreated cotton fabric;

[0168] S2. Place the pretreated cotton fabric in the modification solution, soak it at 55 °C for 15 min, take it out, wash it 3 times with deionized water, and dry it in an oven at 70 °C for 15 min to obtain a modified cotton fabric;

[0169] S3. Mix sodium chloride, fatty alcohol polyoxyethylene ether, sodium dodecyl sulfate, reactive red X-3B, disperse brilliant blue E-4R, and deionized water to obtain a dyeing solution. Place the modified cotton fabric in the dyeing solution, after dyeing, take it out, wash it 3 times with deionized water, and dry it in an oven at 70 °C for 15 min to obtain a multi-color fabric;

[0170] Among them, in step S1, the mass ratio of the cotton fabric to the hydrogen peroxide solution is 10:120;

[0171] In step S2, the mass ratio of the pretreated cotton fabric to the modification solution is 10:80;

[0172] In step S3, the mass ratio of sodium chloride, fatty alcohol polyoxyethylene ether, sodium dodecyl sulfate, reactive red X-3B, disperse brilliant blue E-4R, and deionized water is 2.5:0.2:0.2:3:3:110;

[0173] In step S3, the dyeing bath ratio is 1:100, the dyeing temperature is 50 °C, and the dyeing time is 50 min.

[0174] The modification solution is specifically prepared by the following steps:

[0175] A1. Add 5 g of carboxylated cellulose microspheres to 110 mL of a sodium hydroxide solution with a mass fraction of 5%, stir evenly, add 1.3 g of β-cyclodextrin, continue to stir for 30 min, then add 3 mL of epichlorohydrin, stir and react at 50 °C for 5 h, filter, wash with deionized water 3 times, and dry in an oven at 70 °C for 10 min to obtain a solid;

[0176] A2. Add 3 g of hydroxypropyltrimethylammonium chloride chitosan to 55 mL of deionized water, stir evenly, add 6 g of solid, stir at 70 °C for 40 min, filter, wash with deionized water 3 times, and dry in an oven at 70 °C for 10 min to obtain composite carboxylated cellulose microspheres;

[0177] A3. Mix 75 mL of ethanol, 2.6 g of KH550 and 12 mL of deionized water, stir evenly, add 12 g of composite carboxylated cellulose microspheres, and stir at 700 r / min for 30 min to obtain a modified solution.

[0178] The carboxylated cellulose microspheres are specifically prepared by the following steps:

[0179] Add 12 g of cellulose microspheres to 22 mL of deionized water, stir evenly, add 5 g of citric acid and 2 g of trisodium citrate, ultrasonicate at 60 KHz for 30 min, stir at 85 °C for 8 h until the water evaporates, stir and react at 125 °C for 5 h, cool to room temperature, filter, wash with deionized water 3 times, and dry in an oven at 70 °C for 10 min to obtain carboxylated cellulose microspheres.

[0180] Now, perform performance tests on the multi-color fabrics prepared in Examples 1-3 and Comparative Examples 1-5.

[0181] Testing of the dye uptake rate of disperse dyes and reactive dyes: After dyeing, measure the absorbance of the dye solution at the maximum absorption wavelength using a UV spectrophotometer, and calculate the dye uptake rate according to the formula: Dye uptake rate = (1 - A1 / A0) × 100%, where A v is the absorbance of the dye solution at the start of dyeing, and A1 is the absorbance of the dye solution 10 min after the end of dyeing and fixation.

[0182] Testing of the apparent color depth K / S value: Use a color measurement and matching system to measure the K / S value of the multi-color fabrics prepared above, and test each sample 3 times and take the average value;

[0183] Testing of rubbing fastness and soaping fastness: According to GB / T 3920-2018 "Textiles - Testing of color fastness - Rubbing fastness", use a manual rubbing fastness tester to determine the rubbing fastness of the multi-color fabrics; according to GB / T 3921-2008 "Textiles - Tests for color fastness to soaping", use a soaping fastness tester to determine the soaping fastness of the multi-color fabrics.

[0184] The test results are shown in Table 1 below.

[0185] Table 1 Performance testing of multi-color fabrics prepared in Examples 1-3 and Comparative Examples 1-5

[0186]

[0187]

[0188] As can be seen from the data in Table 1, the multi-color fabrics prepared in Examples 1-3 can adhere dyes of different colors to the fabric surface, achieving multi-color dyeing, having a high dye uptake rate and color fastness, and the dyeing is uniform.

[0189] After treating the cotton fabric with the modified solution prepared by replacing the solid prepared in Step A1 with amphoteric cellulose porous microspheres in Comparative Example 1 and then dyeing, the dyeing effect, uniformity and soaping fastness of the prepared multi-color fabric decreased, proving that β-cyclodextrin grafted on amphoteric cellulose porous microspheres through epichlorohydrin can form an inclusion complex with disperse dyes through hydrophobic interaction, enabling the disperse dyes to be adsorbed on the fabric, and further achieving the adhesion of disperse dyes to the fabric. Moreover, the inclusion of disperse dyes in the internal cavity structure of β-cyclodextrin replaces the dispersant with β-cyclodextrin to complete the adsorption of disperse dyes.

[0190] After treating the cotton fabric with the modified solution prepared by replacing the composite amphoteric cellulose porous microspheres with the solid in Step A1 in Comparative Example 2 and then dyeing, the dyeing effect, uniformity and soaping fastness of the prepared multi-color fabric decreased, proving that grafting chitosan quaternary ammonium salt on amphoteric cellulose porous microspheres can introduce more cationic groups, which are coated on the fabric surface, reducing the negative electrical properties of the fiber fabric surface, and then adhering the reactive dyes to the fiber fabric surface through electrostatic attraction to achieve the dyeing of the fiber fabric with reactive dyes. Moreover, the internal cavity of β-cyclodextrin in the composite amphoteric cellulose porous microspheres is occupied by disperse dyes, and chitosan adsorbs the reactive dyes, enabling dyes of different colors to adhere to the fabric surface, achieving multi-color dyeing, having a high dye uptake rate and color fastness, and the dyeing is uniform.

[0191] After treating the cotton fabric with the modified solution prepared without adding KH550 in Comparative Example 3 and then dyeing, the dyeing effect, uniformity and soaping fastness of the prepared multi-color fabric decreased, proving that a large number of silanol groups are presented on the surface of the fiber fabric by KH550, and the composite amphoteric cellulose porous microspheres are combined with the silanol groups, enabling the composite amphoteric cellulose porous microspheres to be evenly distributed on the fiber fabric surface, improving the dye uptake rate and uniformity of the dyes.

[0192] After treating the cotton fabric with the modified solution prepared by replacing the carboxylated cellulose microspheres with cellulose microspheres in Comparative Example 4 and then dyeing, the dyeing effect, uniformity and soaping fastness of the prepared multi-color fabric decreased, proving that the reaction of cellulose microspheres with citric acid endows the cellulose microspheres with carboxyl groups, which is beneficial to the grafting of β-cyclodextrin on amphoteric cellulose porous microspheres and improves the adsorption effect on disperse dyes.

[0193] In Comparative Example 5, the modified liquid prepared by replacing the amphoteric cellulose porous microspheres with carboxylated cellulose microspheres was used to treat cotton fabric, and then the fabric was dyed. The prepared multi-color fabric had a decrease in dyeing effect, uniformity, and soaping fastness, which proved that the carboxylated cellulose microspheres reacted with triethylenetetramine through glutaraldehyde to endow the cellulose microspheres with amino groups, which was beneficial to the grafting of chitosan quaternary ammonium salt onto the cellulose microspheres and improved the adsorption of reactive dyes.

[0194] In the description of the specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0195] The above content is only an example and illustration of the present invention. Those skilled in the art of the present technology can make various modifications or supplements to the specific embodiments described or use similar methods to replace them. As long as they do not deviate from the invention or exceed the scope defined by the claims of the present invention, they should fall within the protection scope of the present invention.

Claims

1. A printing and dyeing process for multi-color fabrics, characterized in that, The steps include the following: S1. Immerse the cotton fabric in a hydrogen peroxide solution for 30 - 40 min, take it out, wash it, and dry it to obtain a pretreated cotton fabric; S2. Place the pretreated cotton fabric in a modification solution, soak it at 45 - 55 °C for 10 - 15 min, take it out, wash it, and dry it to obtain a modified cotton fabric; S3. Mix sodium chloride, leveling agent, dispersant, reactive dye, disperse dye, and deionized water to obtain a dyeing solution. Place the modified cotton fabric in the dyeing solution, after dyeing, take it out, wash it, and dry it to obtain a multi - colored fabric; The modification solution is obtained by mixing composite amphoteric cellulose porous microspheres, ethanol, coupling agent, and deionized water; The composite amphoteric cellulose porous microspheres are obtained by reacting amphoteric cellulose porous microspheres, β - cyclodextrin, epichlorohydrin, and chitosan quaternary ammonium salt; The amphoteric cellulose porous microspheres are obtained by reacting cellulose microspheres with citric acid, glutaraldehyde, and triethylenetetramine.

2. The printing and dyeing process of a multi-color fabric according to claim 1, characterized in that, The modification solution is specifically prepared by the following steps: A1. Add amphoteric cellulose porous microspheres to a sodium hydroxide solution, stir evenly, add β - cyclodextrin, continue stirring, then add epichlorohydrin, stir and react at 40 - 50 °C for 4 - 5 h, filter, wash, and dry to obtain a solid; A2. Add chitosan quaternary ammonium salt to deionized water, stir evenly, add the solid, stir at 60 - 70 °C for 30 - 40 min, filter, wash, and dry to obtain composite amphoteric cellulose porous microspheres; A3. Mix ethanol, coupling agent, and deionized water, stir evenly, add composite amphoteric cellulose porous microspheres, stir at 600 - 700 r / min for 20 - 30 min to obtain a modification solution.

3. The printing and dyeing process of a multi-color fabric according to claim 2, characterized in that, In step A1, the dosage ratio of the amphoteric cellulose porous microspheres, sodium hydroxide solution, β - cyclodextrin, and epichlorohydrin is (3 - 5) g:(90 - 110) mL:(1.1 - 1.3) g:(1 - 3) mL.

4. The printing and dyeing process of a multi-color fabric according to claim 2, characterized in that, In step A2, the dosage ratio of the chitosan quaternary ammonium salt, deionized water, and solid is (2 - 3) g:(45 - 55) mL:(5 - 6) g.

5. A printing and dyeing process for a multi-color fabric according to claim 2, characterized in that, In step A3, the dosage ratio of the ethanol, coupling agent, deionized water, and composite amphoteric cellulose porous microspheres is (65 - 75) mL:(2.2 - 2.6) g:(8 - 12) mL:(8 - 12) g.

6. The printing and dyeing process of a multi-color fabric according to claim 1, characterized in that, The amphoteric cellulose porous microspheres are specifically prepared by the following steps: B1. Add cellulose microspheres to deionized water, stir evenly, add citric acid and trisodium citrate, ultrasonicate at 40 - 60 KHz for 20 - 30 min, stir at 75 - 85 °C for 6 - 8 h, stir and react at 115 - 125 °C for 4 - 5 h, cool to room temperature, filter, wash, and dry to obtain carboxylated cellulose microspheres; B2. Add the carboxylated cellulose microspheres to a mixed solution of glutaraldehyde and triethylenetetramine, ultrasonicate at 40 - 60 KHz for 20 - 30 min, react at 55 - 65 °C for 0.5 - 1.5 h, cool to room temperature, filter, wash, and dry to obtain amphoteric cellulose porous microspheres.

7. A printing and dyeing process for a multi-color fabric according to claim 6, characterized in that, In step B1, the dosage ratio of the cellulose microspheres, deionized water, citric acid and trisodium citrate is (8-12) g : (18-22) mL : (3-5) g : (1-2) g.

8. A printing and dyeing process for a multi-color fabric according to claim 6, characterized in that, In step B2, the mass ratio of the carboxylated cellulose microspheres, glutaraldehyde and triethylenetetramine is (8-12) : (6-8) : (1-3).

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