CN113047062B - Cotton fabric dyeing method based on polyacid catalysis - Google Patents
Cotton fabric dyeing method based on polyacid catalysis Download PDFInfo
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- CN113047062B CN113047062B CN202110325265.9A CN202110325265A CN113047062B CN 113047062 B CN113047062 B CN 113047062B CN 202110325265 A CN202110325265 A CN 202110325265A CN 113047062 B CN113047062 B CN 113047062B
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- cotton fabric
- acetic acid
- sodium acetate
- buffer solution
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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
- D06P1/008—Preparing dyes in situ
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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
- D06P1/0052—Dyeing with polymeric 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
- 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
- D06P3/605—Natural or regenerated cellulose dyeing with polymeric dyes; building polymeric dyes on fibre
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Abstract
The invention belongs to the technical field of textile dyeing, and relates to a cotton fabric dyeing method based on polyacid catalysis. The dyeing method comprises the following steps: s1, soaking the cotton fabric into an ethanol solution to obtain a cotton fabricRemoving surface attachments, taking out, washing with water and drying; s2, preparing an acetic acid-sodium acetate buffer solution, wherein the pH value of the acetic acid-sodium acetate buffer solution is 3-6; s3, dissolving catechol into a buffer solution of acetic acid-sodium acetate, and then adding polyvanadate to obtain a reaction solution, wherein the polyvanadate is K7[MnV13O38]·18H2O; s4, immersing the cotton fabric obtained in the step S1 in the reaction liquid, heating for 3-8 hours at the temperature of 50-80 ℃, taking out, washing, and airing at room temperature. According to the dyeing method, polyvanadate is used for catalyzing catechol polymerization, so that in-situ dyeing of cotton fabrics is realized, the process is simple, the cost is low, and the obtained cotton fabrics are dyed uniformly and have good color fastness.
Description
Technical Field
The invention belongs to the technical field of textile dyeing, and relates to a cotton fabric dyeing method based on polyacid catalysis.
Background
The cotton fabric is a natural fiber material which is widely applied in the field of textile materials, cotton garments show rich and colorful colors and play an important role in daily life, and the dyeing process is an important link for presenting colorful textiles. Dyeing is usually achieved by physically or chemically bonding dyes to the fibers or by chemically forming dyes on the fibers to achieve the appearance of different colors. The dyeing process is simpler by utilizing a chemical method for in-situ dyeing, and the research is mainly focused on laccase. However, laccase is expensive, another mediator system is needed to exert the catalytic performance, and the storage temperature and the application conditions of laccase are narrow, which greatly limits the industrial production. The polyacid anion, as a polyanion with multiple functions and adjustable structure, has potential application prospects in the aspects of catalysis, medicines, magnetism and the like, particularly in the field of catalysis. The polyacid anion has the advantages of simple synthesis, various varieties, cheap raw materials and wide stable range. The poly-vanadium-oxygen cluster is taken as an important branch of the poly-metal-oxygen cluster, not only has various properties of the poly-metal-oxygen cluster, but also presents more diversified and unique catalytic performances because vanadium has more valence changes.
Disclosure of Invention
In view of the above, the invention aims to provide a dyeing method for cotton fabrics based on polyacid catalysis, which can be implemented in a wider pH range, and the dyed cotton fabrics are uniform in dyeing and good in color fastness.
The invention provides a cotton fabric dyeing method based on polyacid catalysis, which comprises the following steps:
s1, soaking a cotton fabric into an ethanol solution to remove surface attachments, taking out, washing with water and drying;
s2, preparing an acetic acid-sodium acetate buffer solution, wherein the pH value of the acetic acid-sodium acetate buffer solution is 3-6;
s3, dissolving catechol into a buffer solution of acetic acid-sodium acetate, and then adding polyvanadate to obtain a reaction solution, wherein the polyvanadate is K7[MnV13O38]·18H2O；
S4, immersing the cotton fabric obtained in the step S1 in the reaction liquid, heating for 3-8 hours at the temperature of 50-80 ℃, taking out, washing, and airing at room temperature.
Further, in step S2 of the dyeing method, the concentration of the acetic acid-sodium acetate buffer solution is 0.1 mol/L.
Furthermore, in step S3 of the dyeing method, the dosage ratio of the catechol to the acetic acid-sodium acetate buffer solution to the polyvanadate is (0.01-0.05) g to 30mL (0.05-0.3) g.
Further, in step S4 of the dyeing method, the cotton fabric treated in step S1 is immersed in the reaction solution at a bath ratio of 1: 20.
The invention also provides a cotton fabric dyed by the dyeing method.
Compared with the prior art, the poly-vanadate is used for catalyzing catechol polymerization so as to realize cotton fabric in-situ dyeing, and compared with the laccase reported at present, the poly-vanadate is low in price, wide in pH range, easy to store, free of other mediators and wide in application range. The obtained cotton fabric has the advantages of uniform dyeing and good color fastness.
Detailed Description
The present invention is further illustrated by the following examples, which are provided only for the purpose of illustration and are not intended to limit the scope of the invention.
Example 1
Step 1, soaking 1.3g of cotton fabric into an ethanol solution, removing surface attachments, washing with water, and drying for later use.
And 2, preparing 1000mL of 0.1mol/L acetic acid-sodium acetate buffer solution with different pH values of 3.0 for later use.
And 3, dissolving 0.033g of catechol in 30mL of the acetic acid-sodium acetate buffer solution. After the solids had dissolved, 0.12 g K was added7[MnV13O38]·18H2And O, obtaining a reaction solution.
And 4, placing the cotton fabric obtained in the step 1 into the reaction liquid obtained in the step 3, immersing the fabric into the reaction liquid at a bath ratio of 1:20, preserving the heat of the fabric in a shaking water bath kettle at 50 ℃ for 3 hours, taking out the fabric, washing the fabric with distilled water, and airing the fabric at room temperature.
Example 2
Step 1, soaking 1.3g of cotton fabric into an ethanol solution, removing surface attachments, washing with water, and drying for later use.
And 2, preparing 1000mL of 0.1mol/L acetic acid-sodium acetate buffer solution with different pH values of 5.0 for later use.
And 3, dissolving 0.033g of catechol in 30mL of the acetic acid-sodium acetate buffer solution. After the solids had dissolved, 0.12 g K was added7[MnV13O38]·18H2O。
And 4, putting the cotton fabric obtained in the step 1 into the solution obtained in the step 3, immersing the fabric into the reaction solution at a bath ratio of 1:20, preserving the heat of the fabric in a shaking water bath kettle at 50 ℃ for 8 hours, taking out the fabric, washing the fabric with distilled water, and airing the fabric at room temperature.
Example 3
Step 1, soaking 1.3g of cotton fabric into an ethanol solution, removing surface attachments, washing with water, and drying for later use.
And 2, preparing 1000mL of 0.1mol/L acetic acid-sodium acetate buffer solution with different pH values of 6.0 for later use.
And 3, dissolving 0.033g of catechol in 30mL of the acetic acid-sodium acetate buffer solution. After the solid had dissolved, 0.12 g was added K7[MnV13O38]·18H2O。
And 4, putting the cotton fabric obtained in the step 1 into the solution obtained in the step 3, immersing the fabric into the reaction solution at a bath ratio of 1:20, preserving the heat of the fabric in a shaking water bath kettle at 80 ℃ for 3 hours, taking out the fabric, washing the fabric with distilled water, and airing the fabric at room temperature.
Test example
The color parameters of the raw cotton cloth and the dyed fabrics obtained in examples 1 to 3 were measured by a Datacolor-650 type color measuring and matching instrument, and the samples were folded into 2 layers and averaged four times for each sample. The maximum K/S value, L value (representing the brightness), a value (bias of reddish green light) and b value (bias of yellowish blue light) were recorded for the raw cotton and for each group of swatches.
And (3) carrying out soaping-resistant color fastness test on the dyed sample cloth by referring to the method in the national standard GB/T3921-2008. The sample size was 4 x 10cm and was stitched with a cotton wool cloth of the same size. The dosage of the liquid soap detergent is 2 g/L. The soaping temperature is 80-90 deg.C, and the soaping time is 3 min. After washing and natural drying, grading by using a gray sample card for evaluating staining.
The dyed swatches were tested for crocking fastness by reference to the method in GB/T3920-2008 and rated using a grey swatch card for assessment of staining. The square original cotton cloth with the sample size of 5cm multiplied by 5cm is used as lining fabric to be wrapped on the friction head and rubbed for 10 times. For the test of wet rubbing fastness, a square cotton lining cloth was wetted with distilled water, wrung out slightly and wrapped on a rubbing head, and rubbed 10 times.
The properties of the raw cotton cloth and the dyed cotton fabrics obtained in examples 1 to 3 were measured as shown in tables 1 and 2.
TABLE 1 CIE Lab values of dyed cotton fabrics of the respective experimental groups
TABLE 2 color fastness of the catalytic catechol polymerization products to dyeing of cotton fabrics
Lower values of L indicate darker color and higher staining intensity. As can be seen from Table 1, at three pH conditions ranging from pH 3 to 6, polyvanadate catalyzes catechol polymerization and is used for dyeing cotton fabrics, and the L value of the fabrics is lower than that of the original cotton fabrics, indicating high dyeing depth. As can be seen from Table 2, the polymerization products obtained under the three pH conditions have good color fastness to cotton fabrics. Therefore, compared with laccase, the polyvanadate can exert the catalytic effect in a wider pH value range, and is beneficial to reducing equipment loss and reducing production cost.
Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. A cotton fabric dyeing method based on polyacid catalysis is characterized by comprising the following steps:
s1, soaking a cotton fabric into an ethanol solution to remove surface attachments, taking out, washing with water and drying;
s2, preparing an acetic acid-sodium acetate buffer solution, wherein the pH value of the acetic acid-sodium acetate buffer solution is 3-6;
s3, dissolving catechol into the acetic acid-sodium acetate buffer solution, and then adding polyvanadate to obtain a reaction solution, wherein the polyvanadate is K7[MnV13O38]·18H2O；
S4, immersing the cotton fabric obtained in the step S1 in the reaction liquid, heating for 3-8 hours at the temperature of 50-80 ℃, taking out, washing, and airing at room temperature.
2. Dyeing process according to claim 1, characterized in that the concentration of the acetic acid-sodium acetate buffer solution is 0.1 mol/L.
3. The dyeing method according to claim 1, wherein in step S3, the ratio of the amounts of catechol, acetic acid-sodium acetate buffer solution and polyvanadate is (0.01-0.05) g to 30mL (0.05-0.3) g.
4. The dyeing method according to claim 1, characterized in that in step S4, the cotton fabric treated in step S1 is immersed in the reaction liquid at a bath ratio of 1: 20.
5. Cotton fabric dyed according to the dyeing method of claim 1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110325265.9A CN113047062B (en) | 2021-03-26 | 2021-03-26 | Cotton fabric dyeing method based on polyacid catalysis |
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