CN112144301A - Printing and dyeing process for cotton knitted fabric - Google Patents
Printing and dyeing process for cotton knitted fabric Download PDFInfo
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- CN112144301A CN112144301A CN202010942957.3A CN202010942957A CN112144301A CN 112144301 A CN112144301 A CN 112144301A CN 202010942957 A CN202010942957 A CN 202010942957A CN 112144301 A CN112144301 A CN 112144301A
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/38—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using reactive dyes
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/52—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing synthetic macromolecular substances
- D06P1/5207—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- D06P1/5214—Polymers of unsaturated compounds containing no COOH groups or functional derivatives thereof
- D06P1/5242—Polymers of unsaturated N-containing compounds
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/655—Compounds containing ammonium groups
- D06P1/66—Compounds containing ammonium groups containing quaternary ammonium groups
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/673—Inorganic compounds
- D06P1/67333—Salts or hydroxides
- D06P1/6735—Salts or hydroxides of alkaline or alkaline-earth metals with anions different from those provided for in D06P1/67341
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
- D06P3/58—Material containing hydroxyl groups
- D06P3/60—Natural or regenerated cellulose
- D06P3/66—Natural or regenerated cellulose using reactive dyes
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
- D06P5/02—After-treatment
- D06P5/10—After-treatment with compounds containing metal
Abstract
The invention relates to the technical field of textile printing and dyeing, and particularly discloses a printing and dyeing process for a cotton fiber fabric, which comprises the following steps: s1: the pretreatment stage comprises activation treatment and cationic reagent modification; s11: activating, namely preparing an activating solution by adopting strong alkali, and immersing the fabric into the activating solution for activating; s12: modifying with a cationic reagent, namely immersing the activated fabric into a cationic modifying solution for cationic modification; s2: in the dyeing stage, an anionic reactive dye solution is adopted to dye the fabric obtained in the step S12; s3: and in the color fixing stage, the fabric is immersed into color fixing liquid containing coupling agent modified nano zinc oxide for color fixing. The printing and dyeing process has the advantage of improving the dye uptake and the fixation rate of the reactive dye.
Description
Technical Field
The invention relates to the technical field of textile printing and dyeing, in particular to a printing and dyeing process for cotton knitted fabric.
Background
The cotton fabric has good moisture absorption, ventilation, heat preservation and other properties, is one of the most widely applied fibers in natural fibers, is mainly used in the clothing field, and is also used for preparing sofa fabrics, curtain fabrics, other decorative fabrics, bedding and the like.
The traditional cotton fabric dyeing mainly uses direct dye for dyeing, and the soaping fastness of the dyed cotton fabric is lower. Therefore, in recent years, reactive dyes have been generally used for dyeing cotton fabrics in order to improve the soaping fastness of the cotton fabrics. The reactive dye can chemically react with the cotton fabric and is grafted on the fabric through a covalent bond, so that the soaping fastness is relatively high. However, cotton fibers are electronegative in aqueous solution, and the molecules of the reactive dye contain anionic water-soluble groups, so that the dye uptake and the fixation rate are low due to the repulsion of the same poles.
The traditional Chinese patent with publication number CN107815896A discloses a printing and dyeing process of pure cotton fabric, which comprises the following steps: pretreating fabric, bottoming the fabric, printing, drying the antique color, steaming, washing with water for the first time, soaping, washing with water for the second time and drying to obtain the finished product. According to the printing and dyeing process of the pure cotton fabric, the pure cotton fabric is pretreated by changing dye molecules, so that the dye uptake of the pure cotton fabric is effectively increased; however, the invention still has the problem that the dye uptake and the fixation rate are not high enough.
Disclosure of Invention
Aiming at the problems of low dye uptake and color fixing rate in the prior art, the invention aims to provide a cotton knitted fabric printing and dyeing process which has the advantage of improving the dye uptake and the color fixing rate of reactive dyes.
In order to achieve the first object, the invention provides the following technical scheme:
a printing and dyeing process for cotton knitted fabric comprises the following steps:
s1: the pretreatment stage comprises activation treatment and cationic reagent modification;
s11: activating, namely preparing an activating solution by adopting strong alkali, and immersing the fabric into the activating solution for activating;
s12: modifying with a cationic reagent, namely immersing the activated fabric into a cationic modifying solution for cationic modification;
s2: in the dyeing stage, an anionic reactive dye solution is adopted to dye the fabric obtained in the step S12;
s3: and in the color fixing stage, the fabric is immersed into color fixing liquid containing coupling agent modified nano zinc oxide for color fixing.
By adopting the technical scheme, the activation solution prepared from strong alkali is used for activating the cotton fiber fabric, so that the hydroxyl of the cotton fiber can be exposed, the modification activity of the cotton fiber is improved, and the modification of the cotton fiber by the cationic agent is facilitated. And (3) reacting a cationic reagent in the cationic modification solution with hydroxyl on the cotton fiber, grafting the cationic reagent on the cotton fiber, and modifying the cotton fiber to enable the modified cotton fiber to have positive charges. Because the anionic reactive dye is adopted in the application and has negative charges, the modified cotton fiber and the anionic reactive dye are attracted in a different way, and the anionic reactive dye is adsorbed onto the cotton fiber and reacts with hydroxyl on the cotton fiber to be combined with the cotton fiber, so that the purpose of dyeing is achieved. The cotton fiber is modified by the cationic reagent, so that the repulsion between the cotton fiber and the reactive dye is reduced, the substantivity between the cotton fiber and the reactive dye is enhanced, the adsorption on the reactive dye cotton fiber is promoted, and the dye uptake of the reactive dye is improved.
The nano zinc oxide modified by the coupling agent is used for fixing the color of the fabric, a layer of protective film can be formed on the surface of the reactive dye, and the abrasion to the reactive dye is reduced, so that the color fastness and the color fixing rate of the reactive dye are improved. In addition, the zinc oxide has certain antibacterial property, and is beneficial to increasing the antibacterial property of the fabric.
Further, in the step S11, after the fabric is immersed in the activating solution for 1 to 2 hours, the pH of the activating solution is adjusted to 0.65 to 0.75 by using an acid solution, and then the fabric is taken out and dried to obtain the activated cotton fiber fabric.
Further, the activating solution in step S11 is sodium hydroxide solution with a concentration of 0.2-0.3 g/mL.
Further, the step S12 cationic reagent modification includes the following steps;
firstly, modifying for one time, preparing 2-8wt% betaine solution, and adding a catalyst to prepare a cation modified solution 1, wherein the weight ratio of the catalyst to the betaine is (4-5) to 100; then, soaking the fabric subjected to the activation treatment in the step S11 in a cation modification solution 1 at 50-60 ℃ for 10-15min, taking out, and drying;
secondly, performing secondary modification, preparing a cationic monomer with the mass concentration of 3-5% to obtain a cationic modified solution 2, soaking the fabric subjected to primary modification in the cationic modified solution 2 at 80-90 ℃ for 10-15min, taking out, and drying.
By adopting the technical scheme, the betaine and hydroxyl in the cotton fiber are subjected to esterification reaction under the action of the catalyst, so that the cotton fiber is quaternized, the quaternary ammonium cation and the anionic reactive dye are subjected to electrostatic attraction, the affinity between the cotton fiber and the anionic reactive dye is improved, and the dye uptake and the color fixing rate of the anionic reactive dye are improved. Meanwhile, the betaine has better permeability and is grafted to cotton fibers to facilitate level dyeing, but the betaine has the problems of poor substantivity, long treatment time, large dosage and the like. Therefore, the cationic monomer is adopted to carry out secondary modification on the cotton fiber, and the cationic polymer is formed after the cationic monomer is polymerized, so that the cationic polymer has good directness and less dosage. Therefore, the cotton fiber is modified by adopting the betaine and the cationic monomer respectively, so that the micromolecular cationic reagent and the macromolecular cationic reagent are matched with each other in a synergistic manner, the modified cotton fiber is beneficial to level dyeing and has better substantivity, and the dye uptake and the fixation rate of the reactive dye are improved.
In addition, by utilizing the porous structure of the cotton fiber, the cationic monomer is introduced into the porous structure of the cotton fiber, and polymerization reaction occurs among pores of the cotton fiber, so that the macromolecular chain penetrates through the cotton fiber and is firmly fixed on the cotton fiber, and meanwhile, the cationic monomer is not easy to fall off from the cotton fiber in the dyeing process. In addition, the cationic monomer is embedded into pores of the cotton fibers and mutually permeates with the cotton fibers, so that the level dyeing and the penetrating dyeing of the cotton fibers are increased.
Further, the cationic monomer includes one or more of acryloyloxyethyltrimethyl ammonium chloride, dimethyldiallylammonium chloride/methacryloyloxyethyltrimethylammonium chloride.
Further, the catalyst adopts one or two of sodium hypophosphite monohydrate and dicyandiamide.
Further, the preparation method of the color fixing solution comprises the following steps:
(1) adding a coupling agent into absolute ethyl alcohol, and mixing at 60-65 ℃ to obtain a modifier, wherein the weight ratio of the coupling agent to the absolute ethyl alcohol is 1 (2.5-3.5);
(2) adding nano zinc oxide into the modifier in the step (1), and carrying out ultrasonic vibration for 2-2.5h to obtain a color fixing solution, wherein the weight ratio of the nano zinc oxide to the coupling agent is (50-60): 1.
By adopting the technical scheme, the nano zinc oxide is modified by the coupling agent, the surface property of the nano zinc oxide is obviously improved, a net structure can be formed on the surface of the reactive dye through crosslinking, a compact protective film is formed on the surface of the reactive dye, and the abrasion to the reactive dye is reduced, so that the improvement of the rubbing fastness and the washing fastness of the reactive dye is facilitated. In addition, the addition of the nano zinc oxide is beneficial to increasing the antibacterial performance of the fabric.
Further, the coupling agent adopts one or two of glycidyl ether propyl trimethoxy silane, aminopropyl triethoxy silane, bis (r- (triethoxy silicon) propyl) tetrasulfide, bis (trimethoxy silicon propyl) amine, glycidyl ether oxygen propyl trimethoxy silane and vinyl triethoxy silane.
Further, the dyeing phase comprises the following steps: and (3) soaking the modified fabric into an anion reactive dye solution, and dyeing for 10-20min at 50-60 ℃ with a bath ratio of 1 (8-10).
In conclusion, the invention has the following beneficial effects:
1. according to the invention, the micromolecular cationic reagent and the macromolecular cationic reagent are adopted to modify the cotton fiber in a synergistic manner, so that the modified cotton fiber has the permeability of the micromolecular cationic reagent and the substantivity of the macromolecular cationic reagent, the dye-uptake rate and the color fixing rate of the reactive dye can be improved, and the printing and dyeing effect on the cotton fiber is greatly improved.
2. According to the invention, the nano zinc oxide modified by the coupling agent is adopted to fix the color of the printed fabric, a layer of compact protective film can be formed on the surface of the reactive dye, and the wear resistance of the reactive dye is increased, so that the color fastness of the reactive dye is improved.
3. According to the invention, the wear resistance of the reactive dye is improved by adopting the nano zinc oxide, and the antibacterial property of the fabric can be improved.
4. The betaine grafted on the cotton fiber can improve the antibacterial performance of the cotton fiber, and the betaine and the cotton fiber are bonded through chemical bonds, so that the cotton fiber has a lasting antibacterial property.
Detailed Description
The present invention will be described in further detail with reference to examples and comparative examples.
Example 1
A printing and dyeing process for cotton knitted fabric comprises the following steps:
s1: the pretreatment stage comprises activation treatment and cationic reagent modification;
s11: the activation treatment is carried out on the raw materials,
1) preparing an activating solution with the concentration of 0.2/mL by adopting sodium hydroxide;
2) soaking the fabric into the activating solution for 1h under the stirring state; then, adjusting the pH value of the activating solution to 0.65 by adopting a hydrochloric acid solution; and then taking out the fabric, rolling the fabric to dry, and drying the fabric at 80 ℃ for 5min to obtain the activated cotton fiber fabric.
S12: cationic reagent modification, including primary modification and secondary modification;
firstly, modifying for the first time, preparing 2 wt% betaine solution, and adding sodium hypophosphite monohydrate to prepare cation modified solution 1, wherein the weight ratio of the sodium hypophosphite monohydrate to the betaine is 4: 100; then, immersing the activated cotton fiber fabric obtained in the step S11 into the cation modification solution 1, soaking for 10min at 50 ℃ under a stirring state, taking out, and rolling to dry;
secondly, performing secondary modification, preparing an acryloyloxyethyl trimethyl ammonium chloride monomer with the mass concentration of 3% to obtain a cationic modification solution 2, then soaking the fabric subjected to primary modification into the cationic modification solution 2 under a stirring state at 80 ℃ for 10min, taking out the fabric, rolling the fabric to dry, and drying the fabric at 80 ℃ for 5min to obtain the modified cotton fiber fabric.
S2: a dyeing stage, soaking the modified cotton fiber fabric into an anion reactive dye solution, dyeing for 20min at 50 ℃ under a stirring state, taking out, rolling to dry, and drying for 2min at 85 ℃; wherein the concentration of the reactive dye is 80g/L, and the bath ratio is 1: 8.
S3: in the color fixing stage, the color of the raw materials is fixed,
s31: adding glycidyl ether propyl trimethoxy silane into absolute ethyl alcohol, and performing ultrasonic vibration at 60 ℃ for 10min to obtain a modifier, wherein the weight ratio of the glycidyl ether propyl trimethoxy silane to the absolute ethyl alcohol is 1: 2.5;
s32: adding nano zinc oxide into the modifier in the step (1), and carrying out ultrasonic vibration for 2 hours to obtain a color fixing solution, wherein the weight ratio of the nano zinc oxide to the coupling agent is 50: 1;
s33: and (5) soaking the fabric obtained in the step (S2) in the color fixing solution for 3min under a continuous stirring state, and rolling to dry.
S4: washing with water;
and (5) washing, soaping and washing the fabric processed in the step S3 to obtain a finished product.
Example 2
A printing and dyeing process for cotton knitted fabric comprises the following steps:
s1: the pretreatment stage comprises activation treatment and cationic reagent modification;
s11: the activation treatment is carried out on the raw materials,
1) preparing an activating solution with the concentration of 0.25/mL by adopting sodium hydroxide;
2) soaking the fabric into the activating solution for 1.5h under the stirring state; then, adjusting the pH value of the activating solution to 0.7 by adopting a hydrochloric acid solution; and then taking out the fabric, rolling the fabric to dry, and drying the fabric at 80 ℃ for 5min to obtain the activated cotton fiber fabric.
S12: cationic reagent modification, including primary modification and secondary modification;
firstly, modifying for one time, preparing betaine solution with the concentration of 5 wt%, and adding dicyandiamide to prepare cation modified solution 1, wherein the weight ratio of dicyandiamide to betaine is 4.5: 100; then, immersing the activated cotton fiber fabric obtained in the step S11 into the cation modification solution 1, soaking for 12min at 55 ℃ under a stirring state, taking out, and rolling to dry;
secondly, performing secondary modification, preparing a dimethyl diallyl ammonium chloride monomer with the mass concentration of 4% to obtain a cationic modification solution 2, then soaking the fabric subjected to primary modification into the cationic modification solution 2, soaking the fabric at 85 ℃ for 12min under a stirring state, taking out the fabric, rolling the fabric to dry, and drying the fabric at 80 ℃ for 5min to obtain the modified cotton fiber fabric.
S2: a dyeing stage, soaking the modified cotton fiber fabric obtained in the step S21 into an anion reactive dye solution, dyeing for 15min at 55 ℃ under a stirring state, taking out, rolling to dry, and drying for 2min at 85 ℃; wherein the concentration of the reactive dye is 80g/L, and the bath ratio is 1: 9.
S3: in the color fixing stage, the color of the raw materials is fixed,
s31: adding aminopropyltriethoxysilane into anhydrous ethanol, and performing ultrasonic vibration at 60 deg.C for 10min to obtain modifier, wherein the weight ratio of aminopropyltriethoxysilane to anhydrous ethanol is 1: 3;
s32: adding nano zinc oxide into the modifier in the step (1), and carrying out ultrasonic vibration for 2.2 hours to obtain a color fixing solution, wherein the weight ratio of the nano zinc oxide to the coupling agent is 55: 1;
s33: and (5) soaking the fabric obtained in the step (S2) in the color fixing solution for 3min under a continuous stirring state, and rolling to dry.
S4: washing with water;
and (5) washing, soaping and washing the fabric processed in the step S3 to obtain a finished product.
Example 3
A printing and dyeing process for cotton knitted fabric comprises the following steps:
s1: the pretreatment stage comprises activation treatment and cationic reagent modification;
s11: the activation treatment is carried out on the raw materials,
1) preparing an activating solution with the concentration of 0.3/mL by adopting sodium hydroxide;
2) soaking the fabric into the activating solution for 2 hours under the stirring state; then, adjusting the pH value of the activating solution to 0.75 by adopting a hydrochloric acid solution; and then taking out the fabric, rolling the fabric to dry, and drying the fabric at 80 ℃ for 5min to obtain the activated cotton fiber fabric.
S12: cationic reagent modification, including primary modification and secondary modification;
firstly, modifying for the first time, preparing 8wt% betaine solution, and adding sodium hypophosphite monohydrate to prepare cation modified solution 1, wherein the weight ratio of the sodium hypophosphite monohydrate to the betaine is 5: 100; then, immersing the activated cotton fiber fabric obtained in the step S11 into the cation modification solution 1, soaking for 15min at 60 ℃ under a stirring state, taking out, and rolling to dry;
secondly, performing secondary modification, preparing a methacryloyloxyethyl trimethyl ammonium chloride monomer with the mass concentration of 5% to obtain a cation modification solution 2, then soaking the fabric subjected to primary modification into the cation modification solution 2 at 90 ℃ for 15min under a stirring state, taking out the fabric, rolling the fabric to dry, and drying the fabric at 80 ℃ for 5min to obtain the modified cotton fiber fabric.
S2: a dyeing stage, soaking the modified cotton fiber fabric into an anion reactive dye solution, dyeing for 10min at 60 ℃ under a stirring state, taking out, rolling to dry, and drying for 2min at 85 ℃; wherein the concentration of the reactive dye is 80g/L, and the bath ratio is 1: 10.
S3: in the color fixing stage, the color of the raw materials is fixed,
s31: adding bis (r- (triethoxysilyl) propyl) tetrasulfide into absolute ethyl alcohol, and performing ultrasonic vibration for 10min at 60 ℃ to obtain a modifier, wherein the weight ratio of the bis (r- (triethoxysilyl) propyl) tetrasulfide to the absolute ethyl alcohol is 1: 3.5;
s32: adding nano zinc oxide into the modifier in the step (1), and carrying out ultrasonic vibration for 2.5 hours to obtain a color fixing solution, wherein the weight ratio of the nano zinc oxide to the coupling agent is 60: 1;
s33: and (5) soaking the fabric obtained in the step (S2) in the color fixing solution for 3min under a continuous stirring state, and rolling to dry.
S4: washing with water;
and (5) washing, soaping and washing the fabric processed in the step S3 to obtain a finished product.
Example 4
A cotton knitted fabric printing and dyeing process, which is different from the process of the embodiment 2 in that the coupling agent adopts the same amount of bis (trimethoxysilylpropyl) amine to replace aminopropyltriethoxysilane.
Example 5
The difference between the cotton knitted fabric printing and dyeing process and the embodiment 2 is that the same amount of glycidoxypropyltrimethoxysilane is used as the coupling agent to replace aminopropyltriethoxysilane.
Example 6
The difference between the cotton knitted fabric printing and dyeing process and the example 2 is that the same amount of vinyl triethoxysilane is used as the coupling agent instead of aminopropyl triethoxysilane.
Comparative example 1
A cotton knitted fabric printing process, which is different from example 2 in that no activation treatment is included in step S1.
Comparative example 2
A cotton knitted fabric dyeing process, which is different from the example 2 in that the cationic reagent modification of the step S12 comprises primary modification of the fabric by betaine.
Comparative example 3
A cotton knitted fabric printing and dyeing process, which is different from the process of the embodiment 2 in that the cationic reagent modification of the step S12 comprises secondary modification of the fabric by a cationic monomer.
Comparative example 4
A cotton knitted fabric printing and dyeing process, which is different from the process of the embodiment 2 in that in the color fixing stage of the step S3, the modified nano zinc oxide is replaced by the same amount of unmodified nano zinc oxide.
Performance detection
The cotton fiber fabrics were printed using the printing processes of examples 1-6 and comparative examples 1-4, and the results of the printing were analyzed as shown in table 1:
(1) dye uptake: e ═ A0-A1)/A0×100％；A0Is the initial dye liquor absorbance value; a. the1The absorbance value of the residual liquid after dyeing is obtained; can be measured by an ultraviolet-visible spectrophotometer (absorbance at 510 mm).
(2) Rubbing fastness: the assay was performed according to GB/T3920-1997.
(3) And (3) fixation rate: the measurement was carried out according to the method defined in GB/T2396-2013.
TABLE 1 analysis of staining results
As can be seen from Table 1, the dye-uptake, rubbing fastness and fixation of examples 1-6 are all better than those of comparative examples 1-4, which shows that the dye-printing process adopted by the invention can effectively improve the dye-uptake, rubbing fastness and fixation of the reactive dye.
Comparing example 2 with comparative example 1, the dye uptake, rubbing fastness and fixation rate in example 2 are all superior to those in comparative example 1, which shows that the activation of the cotton fiber by the activating solution can improve the modification activity of the cotton fiber, facilitate the modification of the cotton fiber by the cationic agent, and improve the modification effect of the cotton fiber by the cation, thereby increasing the dye uptake, rubbing fastness and fixation rate of the reactive dye.
Compared with the comparative examples 2 and 2-3, the dye uptake, the rubbing fastness and the color fixing rate of the example 2 are superior to those of the comparative examples 2-3, and the micromolecular cationic reagent and the macromolecular cationic reagent cooperate to modify the cotton fiber, so that the modified cotton fiber has the permeability of the micromolecular cationic reagent and the substantivity of the macromolecular cationic reagent, the dye uptake and the color fixing rate of the reactive dye can be improved, and the printing and dyeing effect on the cotton fiber is greatly improved. Compared with the method of singly adopting a small molecular cation reagent or singly using a high molecular cation reagent, the modification effect is greatly improved.
Comparing example 2 with comparative example 4, the dye uptake, rubbing fastness and fixation rate in example 2 are all better than those in comparative example 4, which shows that the nano zinc oxide modified by the coupling agent can form a layer of compact protective film on the surface of the reactive dye, so that the wear resistance of the reactive dye is increased, and the wear resistance fastness of the reactive dye is improved.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (9)
1. A printing and dyeing process for cotton knitted fabric is characterized by comprising the following steps:
s1: a pretreatment stage comprising activation treatment and cationic agent modification;
s11: activating, namely preparing an activating solution by adopting strong alkali, and immersing the fabric into the activating solution for activating;
s12: modifying with a cationic reagent, namely immersing the activated fabric into a cationic modifying solution for cationic modification;
s2: in the dyeing stage, an anionic reactive dye solution is adopted to dye the fabric obtained in the step S12;
s3: and in the color fixing stage, the fabric is immersed into color fixing liquid containing coupling agent modified nano zinc oxide for color fixing.
2. The printing and dyeing process of the cotton knitted fabric according to claim 1, characterized in that in the step S11, after the fabric is immersed in the activating solution for 1-2 hours, the pH of the activating solution is adjusted to 0.65-0.75 by using acid liquor, and then the fabric is taken out and dried to obtain the activated cotton fiber fabric.
3. The printing and dyeing process of the cotton knitted fabric according to claim 1, wherein the activating solution in the step S11 is sodium hydroxide solution with a concentration of 0.2-0.3 g/mL.
4. The cotton knitted fabric printing and dyeing process according to claim 2, wherein the step S12 cationic agent modification comprises the steps of;
5. The printing and dyeing process of claim 4, wherein the cationic monomer comprises one or more of acryloyloxyethyltrimethyl ammonium chloride, dimethyldiallylammonium chloride and methacryloyloxyethyl trimethylammonium chloride.
6. The printing and dyeing process of the cotton knitted fabric according to claim 4, wherein the catalyst is one or two of sodium hypophosphite monohydrate and dicyandiamide.
7. The printing and dyeing process of the cotton knitted fabric according to claim 1, wherein the preparation method of the color fixing solution comprises the following steps:
(1) adding a coupling agent into absolute ethyl alcohol, and mixing at 60-65 ℃ to obtain a modifier, wherein the weight ratio of the coupling agent to the absolute ethyl alcohol is 1 (2.5-3.5);
(2) adding nano zinc oxide into the modifier in the step (1), and carrying out ultrasonic vibration for 2-2.5h to obtain a color fixing solution, wherein the weight ratio of the nano zinc oxide to the coupling agent is (50-60): 1.
8. The cotton knitted fabric printing and dyeing process according to claim 7, wherein the coupling agent is one or two of glycidyl ether propyl trimethoxy silane, aminopropyl triethoxy silane, bis (r- (triethoxy silicon) propyl) tetrasulfide, bis (trimethoxysilylpropyl) amine, glycidyl ether oxypropyl trimethoxy silane and vinyl triethoxy silane.
9. The cotton knitted fabric printing and dyeing process according to claim 1, characterized in that the dyeing stage comprises the following steps: and (3) soaking the modified fabric into an anion reactive dye solution, and dyeing for 10-20min at 50-60 ℃ with a bath ratio of 1 (8-10).
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| CN (1) | CN112144301A (en) |
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| CN115323811A (en) * | 2022-08-22 | 2022-11-11 | 郑州渡森服饰有限公司 | Anti-discoloration fabric and preparation method thereof |
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| CN109629255A (en) * | 2018-11-27 | 2019-04-16 | 杭州卓达染整有限公司 | A kind of high color fastness dyeing of terylen cotton knitting fabric |
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| CN103088675A (en) * | 2011-10-29 | 2013-05-08 | 张秀华 | Reactive dye low-salt dyeing assistant |
| CN103215805A (en) * | 2013-04-16 | 2013-07-24 | 大连理工大学 | Salt-free dyeing method for active dye |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115323811A (en) * | 2022-08-22 | 2022-11-11 | 郑州渡森服饰有限公司 | Anti-discoloration fabric and preparation method thereof |
| CN115323811B (en) * | 2022-08-22 | 2023-12-01 | 郑州渡森服饰有限公司 | Anti-decoloring fabric and preparation method thereof |
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