CN108442149B - Cyclic dyeing method of fabric by using reactive dye colored microspheres - Google Patents
Cyclic dyeing method of fabric by using reactive dye colored microspheres Download PDFInfo
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- CN108442149B CN108442149B CN201810399256.2A CN201810399256A CN108442149B CN 108442149 B CN108442149 B CN 108442149B CN 201810399256 A CN201810399256 A CN 201810399256A CN 108442149 B CN108442149 B CN 108442149B
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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
- D06P1/0004—General aspects of dyeing
- D06P1/0016—Dye baths containing a dyeing agent in a special form such as for instance in melted or solid form, as a floating film or gel, spray or aerosol, or atomised 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
- D06P1/0032—Determining dye recipes and dyeing parameters; Colour matching or monitoring
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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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Abstract
The invention provides a method for circularly dyeing a fabric by using reactive dye colored microspheres, which comprises the following steps: s1, adsorbing the reactive dye by using polystyrene-acrylate cation nano microspheres to obtain reactive dye colorful microspheres, wherein the use amount of the reactive dye relative to the nano microspheres is 60-75%; s2, taking the dispersion liquid of the reactive dye color microspheres as a dye solution, and carrying out primary dip dyeing on the cationic modified cellulose fabric, wherein the reactive dye color microspheres have the weight c on the fabric01-10%, dyeing temperature of 25-50 ℃, pH value of 3-5, and dyeing time of 10-90 min to obtain primary dyed fabric and dyeing residual liquid; s3, adjusting the concentration c of the dyeing residual liquidn＝cn‑1+ 0.5%, circularly dyeing the initially dyed fabric by adopting the primary dip dyeing process to obtain the dyed fabric. The fabric dyeing method provided by the invention has the advantages of higher dye utilization rate, cost saving and contribution to environmental protection.
Description
Technical Field
The invention relates to the technical field of fabric dyeing, in particular to a cyclic dyeing method of a fabric by using reactive dye colored microspheres.
Background
As one of the main dyes for dyeing cellulose fiber and fabric, the reactive dye has the advantages of bright color, complete color spectrum and the like. The reactive dyes are mainly classified into azo type, phthalocyanine type and anthraquinone type according to the parent dye coloring system, and classified into triazine type and vinyl sulfone type according to the type of the reactive group. Dyeing of reactive dyes with fibers is a chemical reaction that is a covalent bond between the fiber and the dye. The common dyeing method of the reactive dye comprises a dip dyeing method, and the common process flow of dip dyeing cotton fabric comprises the following steps: the fabric is first soaked in dye liquor, heated to 90 deg.c, added with electrolyte sodium sulfate and alkali agent, such as sodium carbonate, fixed and finally washed with water. The reactive dye is easy to hydrolyze during dyeing, so that the dye-uptake and fixation rate of the dye are low, and a large amount of inorganic salt is usually added for dyeing promotion in actual production, so that the production wastewater in the textile printing and dyeing industry contains a large amount of electrolytes and the like. Therefore, the treatment of printing and dyeing wastewater is still a problem at present.
The color polymer composite microsphere is a novel functional composite material combined with a colorant in a specific mode, and has wide application prospects in various fields of textile printing and dyeing, leather manufacturing, electronic display, ink-jet printing, medicine and the like. The colored polymer composite microspheres combine the advantages of the polymer microspheres and the coloring agent, not only have the characteristics of large specific surface area, uniform particle size, various microsphere surface structures and shapes and the like of the polymer microspheres, but also have the advantages of excellent dye chroma, super-strong durability of organic pigments and the like.
The reactive dye salt-free dyeing method is characterized in that the reactive dye salt-free dyeing method is used for dyeing cotton fabrics by taking the colored microspheres obtained by compounding the reactive dye and the polymer microspheres as pigment materials, so that the reactive dye salt-free dyeing of the cotton fabrics can be realized, and the aim of reducing the wastewater discharge in the printing and dyeing industry is fulfilled. However, the dye utilization in this method still remains to be further improved.
Disclosure of Invention
In view of the above, the application provides a method for circularly dyeing a fabric by using the reactive dye colored microspheres, and the method for dyeing the fabric provided by the invention has the advantages of higher dye utilization rate, cost saving and contribution to environmental protection.
The invention provides a method for circularly dyeing a fabric by using reactive dye colored microspheres, which comprises the following steps:
s1, adsorbing the reactive dye by using polystyrene-acrylate cation nano microspheres to obtain reactive dye colorful microspheres, wherein the use amount of the reactive dye relative to the nano microspheres is 60-75 wt%;
s2, taking the dispersion liquid of the reactive dye color microspheres as a dye solution, and carrying out primary dip dyeing on the cationic modified cellulose fabric, wherein the reactive dye color microspheres have the weight c on the fabric01-10%, dyeing temperature is 25-50 ℃, dyeing pH value is 3-5, and dyeing time is 10-90 min, so as to obtain primary dyed fabric and dyeing residual liquid;
s3, adjusting the concentration of the dyeing residual liquid according to the formula 1, and circularly dyeing the primarily dyed fabric by adopting the primary dip dyeing process to obtain a dyed fabric;
cn＝cn-1+ 0.5% of formula 1;
n is the number of dyeing cycles, cnThe dye liquor concentration of the nth dyeing is shown.
Preferably, the reactive dye is a sulfonic acid group-containing reactive dye.
Preferably, the polystyrene-acrylate cation nano-microspheres have an average particle size of 50nm to 150 nm.
Preferably, the polystyrene-acrylate cationic nano-microspheres are styrene-butyl acrylate copolymer cationic nano-microspheres.
Preferably, in step S1, the adsorption reactive dye is performed in the presence of sodium chloride.
Preferably, in step S1, the adsorption of the reactive dye is performed under stirring conditions, and the stirring speed is preferably above 300N/min.
Preferably, the cation modified cellulose fabric is obtained by modifying the cellulose fabric by a modifier, and the modifier is selected from one or more of polyepichlorohydrin amide, epoxypropyltrimethylammonium chloride and 3-chloro-2-hydroxypropyl trimethylammonium chloride.
Preferably, the cellulosic fabric is selected from cotton, hemp, tencel or modal.
Preferably, in step S2, the bath ratio of the primary dip dyeing is 1:20 to 1:100, and the stirring speed is preferably 200 to 300N/min.
Preferably, the step S2 further includes, after the end of the primary padding: and washing the fabric, and drying at 40-110 ℃ to obtain the dry primarily dyed fabric.
The preparation method selects the reactive dye/polystyrene-acrylate cationic microspheres with the dye dosage of 60-75 wt%, and uses the dispersion liquid thereofDyeing the cationic modified cellulose fabric with a dye solution at room temperature in a dip-dyeing mode, and after the primary dip-dyeing is finished, adjusting the concentration c of dyeing residual liquidn＝cn-1+ 0.5% (n is the number of cycles, c)01% -10%), and repeatedly dyeing by adopting the dip dyeing process to obtain the dyed fabric. Compared with the prior art, this application the colored microballon has certain stability and better dyeability, through dyeing to modified fabric circulation, adopts few dyestuff can obtain darker and more bright-colored dyed fabric, practices thrift the dyestuff, is showing the utilization ratio that has improved the dyestuff, environmental protection and with low costs.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a method for circularly dyeing a fabric by using reactive dye colored microspheres, which comprises the following steps:
s1, adsorbing the reactive dye by using polystyrene-acrylate cation nano microspheres to obtain reactive dye colorful microspheres, wherein the use amount of the reactive dye relative to the nano microspheres is 60-75 wt%;
s2, taking the dispersion liquid of the reactive dye color microspheres as a dye solution, and carrying out primary dip dyeing on the cationic modified cellulose fabric, wherein the reactive dye color microspheres have the weight c on the fabric01-10%, dyeing temperature is 25-50 ℃, dyeing pH value is 3-5, and dyeing time is 10-90 min, so as to obtain primary dyed fabric and dyeing residual liquid;
s3, adjusting the concentration of the dyeing residual liquid according to the formula 1, and circularly dyeing the primarily dyed fabric by adopting the primary dip dyeing process to obtain a dyed fabric;
cn＝cn-1+ 0.5% of formula 1;
n is the number of dyeing cycles, cnThe dye liquor concentration of the nth dyeing is shown.
The fabric circular dyeing method provided by the invention has the advantages of higher dye utilization rate, cost saving and contribution to environmental protection.
The embodiment of the invention provides the reactive dye colored microspheres firstly, and the polystyrene-acrylate cationic nano microspheres are adopted to adsorb the reactive dye to obtain the reactive dye colored microspheres. Wherein, the reactive dye is a reactive dye containing sulfonic acid groups, and includes but is not limited to one of reactive red 4, 6, 195, reactive orange 19, 107, 202, reactive yellow 1, 95, 193, reactive blue 15, 19, 49, reactive black 5, 45. In the preferred embodiment of the present invention, the reactive dye used is a monochlorotriazine type reactive dye such as reactive red 24 or reactive yellow 95.
The polystyrene-acrylate cationic nano-microsphere is not particularly limited in source, can be prepared and obtained, and can also be a commercially available product. In the embodiment of the invention, the average particle size of the polystyrene-acrylate cationic nano-microspheres is 50 nm-150 nm. The polystyrene-acrylate cationic nanospheres are preferably styrene-butyl acrylate copolymer cationic nanospheres, and more preferably poly (styrene-butyl acrylate-P-vinylbenzyltrimethylammonium chloride) microspheres, namely P (St-BA-VBT) microspheres. Specifically, undyed P (St-BA-VBT) microspheres have an average particle size of 67nm, a polydispersity index PDI of 0.076, a narrow particle size distribution, and good monodispersity.
According to the embodiment of the invention, the aqueous dispersion of the polymer nano-microspheres and a reactive dye solution are mixed for adsorption, the amount of the reactive dye used relative to the nano-microspheres is 60-75 wt%, and the reactive dye polymer composite microspheres, namely the reactive dye colorful microspheres, are obtained through dialysis and purification. The invention utilizes the electrostatic interaction and the hydrophobic interaction between the reactive dye and the cationic copolymer microsphere to obtain the colored copolymer microsphere with higher content of the reactive dye, and the microsphere has the excellent color performance of the dye and also has the special effects of large specific surface area of the copolymer microsphere, and absorption and scattering of light.
Wherein the dye is used in an amount of 60-75 wt%, and the average particle size of the colorful microsphere copolymer can be 83-93 nm; the dye is preferably used in 75%, the particle size distribution is narrow, the monodispersity is better, while the dye is used in less than 60%, for example, the dye is used in 30%, the average particle size of the reactive yellow 95/copolymer microspheres is 117nm, the PDI is 0.195, and the particle size distribution is widest, which is not beneficial to the application.
Preferably, the adsorption of the reactive dye is carried out in the presence of sodium chloride, which is more favorable for the adsorption of the dye. The adsorption of the reactive dye is preferably carried out under stirring conditions, the stirring speed is preferably over 300N/min (namely the rotating speed of an engine per minute), such as 300-500N/min, and the adsorption amount of the dye is high. According to the embodiment of the invention, the dye can be adsorbed at the pH value of 4-6 and the room temperature of 25-40 ℃, and the active dye color microspheres with high dye adsorption amount and stable performance can be obtained by conventional purification after 120 min. In the embodiment of the invention, the adsorption capacity of the obtained active dye colored microspheres is generally over 300mg/g, such as 350-600 mg/g, specifically 530mg/g, 580mg/g, and the like.
The invention adopts the polymer composite microspheres as pigment materials, and dyes the fabric after modification, thereby not only solving the problems of poor deep dyeing property, low color and the like of dyes and pigments on the fabric, but also realizing salt-free dyeing, reducing sewage discharge and saving cost.
In an embodiment of the invention, the cellulose fabric may be modified by placing it in a solution of a modifying agent, preferably selected from one or more of the group consisting of polyepichlorohydrin amides, epoxypropyltrimethylammonium chloride and 3-chloro-2-hydroxypropyltrimethylammonium chloride (EPTAC), resulting in a cationically modified cellulose fabric. The cellulose fabric can be selected from cotton fabric, hemp fabric, tencel fabric or modal fabric, and is preferably cotton fabric; the fabric may be woven or knitted, and the present invention is not particularly limited in technical indexes such as structure and basic performance of the fabric. In the embodiment of the invention, the cellulose fabric is a cotton knitted fabric, and the gram weight is 100-120 g/m2。
Specifically, the cellulose fabric is placed in a modifier solution with the concentration of 1-50 g/L, and the bath ratio can be 1: 20-1: 100; the preferred modification temperature is 20-70 ℃, the stirring speed can be 200N/min, and the time is 10-120 min. After the modification is finished, the cationic modified cellulose fabric can be obtained by treating with a sodium hydroxide solution and finally washing, neutralizing and the like. Here, the bath ratio is the ratio of the fabric in the exhaust mode to the liquor, for example 1:20 is 1g of cellulosic fabric for 19g of water.
Taking cotton fabric as an example, the cotton fiber is a cellulose fiber which is ionized into Cell-O in solution-The cation modifier is ionized into cations in the solution, the cations and the solution are combined with each other through electrostatic attraction, a large amount of the cation modifier is adsorbed on the surface of the cotton fiber, and finally the surface of the cotton fiber is positively charged; as the surface of the active dye/copolymer microsphere is negatively charged, and strong electrostatic attraction exists between the active dye/copolymer microsphere and the cationized modified cotton fabric, the color of the fabric is changed. The cotton fiber is cellulose fiber, the surface of which is provided with obvious grooves, and the cationic modifier does not change the surface morphology of the cotton fiber.
After the reactive dye color microspheres and the cation modified cellulose fabric are obtained, the embodiment of the invention takes the water dispersion of the reactive dye color microspheres as a dyeing solution, and dyes the modified cellulose fabric on an infrared dyeing machine in a dip-dyeing manner at room temperature to obtain an initial dyed fabric and a dyeing residual liquid.
In the embodiment of the invention, water is used for preparing the color microsphere dispersion liquid with different mass concentrations, and the reactive dye color microsphere is used for the fabric weight c01% to 10%, preferably 2% to 9%, more preferably 3% to 5%; the concentration of the prepared reactive dye colorful microsphere dispersion liquid is one of 2%, 4%, 6%, 8%, 10% of the weight of the composite microspheres to the fabric. And the bath ratio of the fabric to the dye liquor prepared from the color microspheres can be 1: 20-1: 100, and preferably 1: 30-1: 80. The embodiment of the invention sets the parameters of the infrared dyeing machine: the stirring speed is 200-300N/min, the dyeing temperature is 25-50 ℃, the dyeing time is 10-90 min, preferably 20-80 min, and the primary dip dyeing is carried out under the condition that the pH value is 3-5.
After dyeing is finished, the embodiment of the invention further comprises the following steps: and washing the fabric, and drying at 40-110 ℃ to obtain the dry primarily dyed fabric. Wherein, the drying time can be 30 min-60 min, and can be adjusted according to the specific conditions of different fabrics and the like.
The invention adopts the colored microspheres to dye the cation modified fabric, and has the following advantages: (1) the polymer composite microspheres have large specific surface area and uniform particle size, so that the fabric is brighter; (2) compared with the traditional dip dyeing process, the polymer composite microsphere dyeing method has the advantages that under the condition of the same dye amount, the K/S of the dyed fabric is obviously improved, and the color is dark; (3) the method is simple and easy to operate, the fabric can be dyed by the colored microspheres at room temperature without adding electrolyte, salt-free dyeing reduces sewage discharge, energy is saved, the environment is protected, the cost is saved, the dyed fabric has good color fastness, and various fastness indexes meet the application standard of the dyed fabric.
After the primary dyed fabric and the dyeing residual liquid are obtained, the pH value of the residual liquid is adjusted to be consistent with that of the original dyeing liquid, and the concentration of the residual liquid microspheres is adjusted to be cn＝cn-1+ 0.5%, wherein n is the number of dyeing cycles, cnAnd (4) repeatedly dyeing by adopting the same dip dyeing process according to the concentration of the dyeing solution for nth dyeing to obtain the dyed fabric subjected to circular dyeing. In the embodiment of the invention, n is more than or equal to 1 and less than or equal to 4, c01% -10%, preferably 3% -5%, finally dyeing to obtain the nth fabric.
The result shows that the color copolymer microsphere dyed fabric has darker color, higher color saturation and vividness, darker and vividness can be obtained by using less dye (the prepared color microsphere), and the color copolymer microsphere can be recycled. The cyclic dyeing method provided by the invention has important significance for innovation of the basic theory of fiber dyeing at present, improvement of the utilization rate of reactive dye, reduction of printing and dyeing wastewater discharge and the like.
In order to further understand the present application, the following describes the method of cyclic dyeing of fabric with reactive dye colored microspheres provided in the present application with reference to the examples.
In the following examples, the cotton fabric involved was a cotton weft plain knit fabric (40s, 110 g/m)2From Zibo Tianro textile printing and dyeing Co., Ltd.); the average particle diameter of the P (St-BA-VBT) microspheres is 67nm, and the polydispersity index PDI is 0.076.
Example 1
Placing the cotton fabric in a modifier 3-chloro-2-hydroxypropyl trimethyl ammonium chloride solution with the concentration of 20g/L (bath ratio is 1: 50), and modifying in an infrared dyeing machine; setting parameters of an infrared dyeing machine: the rotating speed is 200N/min, the temperature is 70 ℃, the heating rate is 3 ℃/min, and the time is 30 min. After the modification, 5g/L NaOH solution was added to the modifier solution, and the treatment was continued for 30 min. And then washing the treated fabric for 5 times by using clean water, neutralizing alkali liquor on the fabric by using a glacial acetic acid solution of 2g/L, and finally washing the fabric to be neutral by using the clean water to obtain the cation modified cotton fabric.
Example 2
Dropwise adding the P (St-BA-VBT) microsphere dispersion liquid into an active red 24 solution, wherein the using amount of the dye relative to the nano microspheres is 75 wt%, adding 2.9mM/L (millimole per liter) NaCl, stirring at the rotating speed of 500N/min, adsorbing the dye at the room temperature of 25 ℃ and the pH value of 5, and dialyzing and purifying after 120min to obtain active red 24 color microspheres (the dye adsorption amount is 363mg/g, and the average particle size is 85 nm).
The modified fabric in example 1 was dyed on an infrared dyeing machine in a dip-dyeing manner using the reactive red 24 colored microsphere dispersion as the dye solution. The specific operation is as follows: preparing active red 24 color microsphere dispersion with concentration of 5% by using distilled water, wherein the bath ratio of the color microsphere dye solution to the modified fabric is 50: 1; setting parameters of an infrared dyeing machine: the rotation speed is 200N/min, the temperature is 25 ℃, and the dyeing is carried out for 30min under the pH value of 4.70. And after dyeing is finished, washing the fabric by using distilled water, flatly placing the fabric in a blast drying oven for drying, and then placing the fabric in a drying oven at 40 ℃ for 30min to obtain the dried primarily dyed fabric.
Adjusting the pH value of the residual liquid after the primary dip dyeing to be consistent with the original dye liquor, and adjusting the concentration of the residual liquid to be cn＝cn-1+ 0.5%, the same padding process is used to dye the as-dyed fabric repeatedly to obtain a dyed fabric after circular dyeing, the color index of which is shown in table 1. In table 1, fabric 0 is a modified cotton fabric dyed with the original solution, and fabrics 1 to 4 are cotton fabrics dyed with the microsphere dispersion liquid circulated 1 to 4 times, respectively.
TABLE 1 color index of cycle dyed modified Cotton Fabric of example 2 of the present invention
As shown in Table 1, the K/S value of fabric 0 was 14.8 at the maximum and that of fabric 3 was 14.2 at the minimum, which differed only by 0.6, i.e., the K/S values of fabrics 0 to 4 were very small, indicating that the recycling of the reactive dye/copolymer microsphere dispersion had no effect on the apparent color depth of the fabric. In addition, the other color values of fabrics 0 to 4 were similar, with little color difference between the fabrics, indicating that the reactive dye/copolymer microsphere cycle dyeing process is feasible. Because the color index of the fabric is closely related to the stability of the reactive dye/copolymer microspheres, no color difference also indicates that the reactive dye/copolymer microspheres still maintain the same stability and dyeing performance after being recovered.
The color index testing method comprises the following steps: folding 4 layers of colored fabric, flatly placing the colored fabric at a test hole of a Datacolor SF-600plus color measuring instrument, and setting test parameters: d65 light source, 6mm measuring aperture, 10 ° viewing angle; the colored fabrics were tested for color indices L, a, b, C and h. The test was performed twice on each layer of the fabric and then averaged.
Moreover, the color fastness of the dyed fabric is tested by the method of GB/T3920-. The results are as follows:
TABLE 2 color fastness index of cycle dyed modified cotton fabric of example 2 of the present invention
As can be seen from Table 2, the dry crockfastness of fabrics 0-1 is grade 5, and the wet crockfastness is grade 4-5; the dry rubbing fastness of the fabrics 2-4 is 4-5 grade, and the wet rubbing fastness is 4 grade; the color fastness of the fabric 0 dyed by the original solution is 3-4 grades, and the color fastness of the fabric 1-4 is 3 grades; the staining fastness of all fabrics was grade 5. Despite the increased number of cycles of dyeing of the microsphere dispersion, excellent color fastness can still meet the application standards for dyed fabrics. The fabric color fastness is dependent on the electrostatic attraction and hydrophobic interaction between the copolymer microspheres and the cationically modified cotton fabric, so the excellent color fastness indicates that the interaction between the two is not affected by the recycling process. These results indicate that recovery and recycle dyeing of reactive dye/copolymer microspheres is feasible, and that the process can potentially achieve zero emissions.
Example 3
Dropwise adding the P (St-BA-VBT) microsphere dispersion liquid into the active yellow 95 solution, wherein the using amount of the dye is 75 wt% relative to the nano microspheres, adding 2.9mM/L NaCl, stirring at the rotating speed of 500N/min, adsorbing the dye at the room temperature of 25 ℃ and the pH value of 5, dialyzing and purifying after 120min to obtain the active yellow 95 color microspheres (the dye adsorption amount is 580mg/g, and the average particle size is 83 nm).
The modified fabric in example 1 was dyed on an infrared dyeing machine in a dip-dyeing manner using the reactive yellow 95 color microsphere dispersion as a dye solution. The specific operation is as follows: preparing 5% active yellow 95 color microsphere dispersion with distilled water, wherein the bath ratio of the color microsphere dye solution to the modified fabric is 50: 1; setting parameters of an infrared dyeing machine: the rotation speed is 500N/min, the temperature is 25 ℃, and dyeing is carried out for 30min under the pH value of 5.0. And after dyeing is finished, washing the fabric by using distilled water, flatly placing the fabric in a blast drying oven for drying, and then placing the fabric in a drying oven at 40 ℃ for 30min to obtain the dried primarily dyed fabric.
Adjusting the pH value of the residual liquid after the primary dip dyeing to be consistent with the original dye liquor, and adjusting the concentration of the residual liquid to be cn＝cn-1+ 0.5%, the same padding process is used to dye the as-dyed fabric repeatedly to obtain a dyed fabric after circular dyeing, the color index of which is shown in table 3, and the color fastness index of which is shown in table 4. In tables 3 and 4, fabric 0 is a modified cotton fabric dyed with the original solution, and fabrics 1 to 4 are cotton fabrics dyed with the microsphere dispersion liquid circulated 1 to 4 times, respectively.
Table 3 color index of cycle dyed modified cotton fabric of example 3 of the present invention
TABLE 4 color fastness index of modified cotton fabric dyed in cycle according to example 3 of the present invention
Example 4
Dropwise adding the P (St-BA-VBT) microsphere dispersion liquid into the active yellow 95 solution, wherein the using amount of the dye is 60 wt% relative to the nano microspheres, adding 2.9mM/L NaCl, stirring at the rotating speed of 500N/min, adsorbing the dye at the room temperature of 25 ℃ and the pH value of 5, dialyzing and purifying after 120min to obtain the active yellow 95 color microspheres (the dye adsorption amount is 530mg/g, and the average particle size is 93 nm).
The modified fabric in example 1 was dyed on an infrared dyeing machine in a dip-dyeing manner using the reactive yellow 95 color microsphere dispersion as a dye solution. The specific operation is as follows: preparing active yellow 95 color microsphere dispersion with the concentration of 3% by using distilled water, wherein the bath ratio of the color microsphere dye solution to the modified fabric is 30: 1; setting parameters of an infrared dyeing machine: the rotation speed is 500N/min, the temperature is 25 ℃, and dyeing is carried out for 30min under the pH value of 5.0. And after dyeing is finished, washing the fabric by using distilled water, flatly placing the fabric in a blast drying oven for drying, and then placing the fabric in a drying oven at 40 ℃ for 50min to obtain the dried primarily dyed fabric.
Adjusting the pH value of the residual liquid after the primary dip dyeing to be consistent with the original dye liquor, and adjusting the concentration of the residual liquid to be cn＝cn-1+ 0.5%, adopting the same dip dyeing process to repeatedly dye the initially dyed fabric to obtain the dyed fabric after circular dyeing, wherein the results of color indexes and color fastness are as follows:
TABLE 5 color index of cycle dyed modified Cotton Fabric of example 4 of the present invention
TABLE 6 color fastness index of cycle dyed modified cotton fabric of example 4 of the present invention
According to the embodiment, the color microspheres have certain stability, and the modified fabric is circularly dyed, so that the deep and bright dyed fabric can be obtained by using a small amount of dye, the dye is saved, the utilization rate of the dye is obviously improved, and the color microspheres are environment-friendly and low in cost. Compared with the traditional dip dyeing process, the K/S of the microsphere circularly dyed fabric is obviously improved, and the color is dark; and the dyed fabric has better color fastness, and various fastness indexes meet the application standard of the dyed fabric.
The above description is only a preferred embodiment of the present invention, and it should be noted that various modifications to these embodiments can be implemented by those skilled in the art without departing from the technical principle of the present invention, and these modifications should be construed as the scope of the present invention.
Claims (7)
1. A method for circularly dyeing fabric by using reactive dye colored microspheres comprises the following steps:
s1, adsorbing the reactive dye by using polystyrene-acrylate cation nano microspheres to obtain reactive dye colorful microspheres, wherein the use amount of the reactive dye relative to the nano microspheres is 60-75 wt%; the reactive dye is reactive red 24 or reactive yellow 95; the adsorption of the reactive dye is carried out in the presence of sodium chloride under the stirring condition;
s2, taking the dispersion liquid of the reactive dye color microspheres as a dye solution, and carrying out primary dip dyeing on the cationic modified cellulose fabric, wherein the reactive dye color microspheres have the weight c on the fabric01 to 10 percent, the dyeing temperature is 25 to 50 ℃, and the dyeing pH value is 3 to 5Dyeing for 10-90 min to obtain a primary dyed fabric and dyeing residual liquid;
s3, adjusting the concentration of the dyeing residual liquid according to the formula 1, and circularly dyeing the primarily dyed fabric by adopting the primary dip dyeing process to obtain a dyed fabric;
cn＝cn-1+ 0.5% of formula 1;
n is the number of dyeing cycles, cnThe dye liquor concentration of the nth dyeing is shown.
2. The cyclic dyeing method according to claim 1, wherein the polystyrene-acrylate cationic nanospheres have an average particle size of 50nm to 150 nm.
3. The cyclic dyeing method according to claim 1, wherein the polystyrene-acrylate cationic nanospheres are styrene-butyl acrylate copolymer cationic nanospheres.
4. The cyclic dyeing process according to claim 1, characterized in that the cationic modified cellulose fabric is obtained by modifying a cellulose fabric with a modifier selected from one or more of polyepichlorohydrin amide, epoxypropyltrimethylammonium chloride and 3-chloro-2-hydroxypropyltrimethylammonium chloride.
5. The cyclic dyeing process according to claim 4, characterized in that the cellulose fabric is selected from cotton, hemp, tencel or modal.
6. The cyclic dyeing method according to claim 1, wherein in step S2, the bath ratio of the primary dip dyeing is 1:20 to 1: 100.
7. The cyclic dyeing method according to claim 1, wherein the step S2 further comprises, after the completion of the primary exhaust dyeing: and washing the fabric, and drying at 40-110 ℃ to obtain the dry primarily dyed fabric.
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| CN111424439A (en) * | 2019-01-10 | 2020-07-17 | 上海安诺其数码科技有限公司 | Preparation method of reactive dye/copolymer microsphere dispersion liquid for digital ink-jet printing |
| CN114657799A (en) * | 2022-04-12 | 2022-06-24 | 绍兴舜锦纺织品有限公司 | Environment-friendly ink-jet printing dye ink for artificial cotton and preparation method thereof |
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