Cotton fiber indigo-sodium alginate microsphere dyeing method

A technology of sodium alginate and dyeing method, which is applied in the field of textile printing and dyeing, can solve the problems that the fabric cannot be in good contact with the air, the leuco body cannot enter well, and the dyeing rate is reduced, so as to avoid ineffective decomposition, improve mechanical properties, The effect of high dye uptake

Pending Publication Date: 2020-12-15
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the conventionally used dyes are in the form of solid powders. During the dyeing process, if the reducing agent used cannot reduce all the dyes, the dye powder will adhere to the surface of the fabric, resulting in the inability of the leuco to enter the fiber. During the oxidation process, the fabric cannot be in good contact with the air, resulting in uneven dyeing and a decrease in dye uptake.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024]A method for dyeing cotton fiber with indigo-sodium alginate microspheres, comprising the following steps:

[0025](1) Preparation of indigo-sodium alginate composite microspheres: Dissolve 1 part of sodium alginate in 100 parts of deionized water at 80°C for later use; add 1.7 parts of indigo dye to the sodium alginate aqueous solution and stir and mix thoroughly; Dissolve 1 part of anhydrous calcium chloride in 100 parts of deionized water, slowly and evenly drop the indigo-sodium alginate mixed solution into the calcium chloride fixing solution, react for 60 minutes, and wash 4 times with deionized water after the reaction is completed; The prepared product is dried for use;

[0026](2) Pretreatment of cotton fiber: Weigh 1g refined cotton fiber, use a brush to smooth the looseness, put it into deionized water to soak and swell, control the liquid-carrying rate of cotton fiber to 120%, and prepare for dyeing;

[0027](3) Preparation of reducing solution: using the full bath reductio...

Embodiment 2

[0032]The difference from Example 1 lies in the following: the preparation of indigo-sodium alginate composite microspheres in step (1) is different, as follows: 2 parts of sodium alginate are dissolved in 100 parts of deionized water at 80°C for use; Add 2 parts of indigo dye to the sodium alginate aqueous solution and mix thoroughly; dissolve 3 parts of anhydrous calcium chloride in 100 parts of deionized water, slowly and uniformly drop the indigo-sodium alginate mixed solution into the calcium chloride fixing solution , React for 60 minutes, wash 4 times with deionized water after the reaction is completed; the prepared product is obtained after freeze-drying treatment. Other conditions are the same as in Example 1.

Embodiment 3

[0034]The difference from Example 1 is that the process recipe for preparing indigo-sodium alginate composite microspheres in step (1) is different, as follows: 3 parts of sodium alginate are dissolved in 100 parts of deionized water at 80°C for use; Add 2.5 parts of indigo dye to the sodium alginate aqueous solution and stir and mix thoroughly; dissolve 3 parts of anhydrous calcium chloride in 100 parts of deionized water, slowly and uniformly drop the indigo-sodium alginate mixed solution into the calcium chloride fixing solution , React for 60 minutes, wash 4 times with deionized water after the reaction is completed; the prepared product is obtained after freeze-drying treatment. Other conditions are the same as in Example 1.

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PUM

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Abstract

The invention discloses a cotton fiber indigo-sodium alginate microsphere dyeing method. According to the method, sodium alginate is used as a dye carrier to construct indigo-sodium alginate compositemicrospheres using the sodium alginate as the carrier. The indigo-sodium alginate composite microspheres are prepared through the following steps: dissolving the sodium alginate in deionized water; adding an indigo dye into a sodium alginate aqueous solution to be uniformly mixed; dissolving anhydrous calcium chloride in deionized water, slowly and uniformly dripping an indigo-sodium alginate mixed solution into a calcium chloride stationary liquid to react for 40-60 min, and washing with deionized water after the reaction is finished; and treating a prepared product for 11-13 h under a freeze-drying condition to obtain the product. The preparation process is simple, controllable in particle size of the microspheres, environmentally friendly, non-toxic and low in cost, and the prepared indigo-sodium alginate composite microspheres are high in leveling property and utilization rate in the process of reductive dyeing by using a full-bath method, still have good mechanical properties after reductive dyeing, can be recycled, and meet the development requirements of ecological dyeing and finishing.

Description

Technical field[0001]The invention relates to a method for dyeing cotton fibers with indigo-sodium alginate microspheres, and belongs to the technical field of textile printing and dyeing.Background technique[0002]Vat dyes have the advantages of bright color and high color fastness to washing. They are an important type of dye for dyeing cotton fibers and their products. Indigo is a representative dye among the vat dyes. The dyeing process of indigo dye generally includes four steps: reduction and dissolution of dye, dyeing of leuco body, oxidation, and post-soaping treatment. Indigo leuco body is soluble in water and diffuses into the fiber. Through the oxidation process, the leuco body is transformed into insoluble dye molecules inside the fiber and fixed.[0003]At present, the conventionally used dyes are in the form of solid powder. During the dyeing process, if the reducing agent used cannot reduce all the dyes, the dye powder will adhere to the surface of the fabric, causing th...

Claims

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Application Information

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IPC IPC(8): D06P1/22D06P1/48D06P3/60D06P1/673D06P5/02D06P5/10
CPCD06P1/22D06P1/48D06P3/6025D06P1/6735D06P5/02D06P5/10
Inventor 巩继贤成美林张健飞
Owner TIANJIN POLYTECHNIC UNIV
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