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Stripping treatment method for dyed textiles

A treatment method and technology for textiles, applied in dyeing, textiles and papermaking, etc., to achieve the effects of convenient operation, wide range of adaptability to pH value, and broad application prospects

Inactive Publication Date: 2010-02-03
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, for the dyes that have been dyed fibers and diffused into the inner phase of the fibers and fixed (such as reactive dyes and fibers are covalently bonded, etc.), the dyes should be treated under the conditions that do not affect the properties of the fibers or have less influence. Carry out decolorization treatment, which is significantly different from the decolorization of dyes dissolved or dispersed in wastewater (liquid phase) in terms of catalytic mechanism and method

Method used

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  • Stripping treatment method for dyed textiles
  • Stripping treatment method for dyed textiles
  • Stripping treatment method for dyed textiles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Nano material Al 2 o 3 The powder is a photocatalyst, and it is prepared to a mass concentration of 0.02g L -1 disperse aqueous solution, and adjust the pH of the solution to 6; then add it to the reaction device at a bath ratio of 1:50, as a stripping bath for nanomaterials. Similarly, the nanomaterials TiO 2 , SiO 2 and CaCO 3 The powder is a photocatalyst, and the stripping bath is prepared according to the above method.

[0028] In this embodiment, a batch reaction device is used to perform nanomaterial photocatalytic stripping treatment on dyed textiles. See attached figure 1 , in the batch reactor 2, an oxygen increasing device 6 is installed, and an oxygen increasing pump is used to continuously feed air into the stripping bath; a quartz glass tube 3 and a low-pressure mercury lamp 4 are installed, and the present embodiment uses an 8W low-pressure mercury lamp It is an ultraviolet light source, and the power supply connection 1 (power supply is not shown)...

Embodiment 2

[0045] Select commercially available rare earth doped nano-semiconductor TiO 2 (Shandong Laiyangzi Xilai Environmental Protection Technology Co., Ltd.) is a photocatalyst and is prepared into a dispersed aqueous solution. Accelerator Al was added to a solution 3+ , the dosage is 2.0×10 -4 mol L -1 , adjust the pH of the solution to 4.5; add accelerator H to another solution 2 o 2 , the dosage is 6.0×10 -2 mol L -1 , adjust the pH of the solution to 10. The above two solutions were doped with nano-TiO 2 The final concentration is 0.04g L -1 , and then they are respectively added to two reaction devices at a bath ratio of 1:80, and according to the intermittent device and process provided in Example 1, the dyed cotton fabric in Example 1 is subjected to photocatalytic stripping under room temperature conditions. treatment, and with no accelerator (but containing equal amount of doped TiO 2 ) of the blank test is compared, and its specific steps and other conditions are...

Embodiment 3

[0053] Nano TiO 2 with SiO 2 After compounding at a mass ratio of 1:1, it becomes a photocatalyst, and the dosage is 0.04g L -1 Prepared as a water dispersion solution, and the accelerator Al 3+ The concentration is 2.0×10 -4 mol L -1 , the solution pH is 4.5. Then join in the batch reaction device by the bath ratio of: 40, press the method for embodiment 1, carry out photocatalytic decolorization treatment 52min at room temperature to the cotton fabric dyed with anthraquinone reactive dye, its specific steps and other conditions As described in Example 1.

[0054] In the present embodiment, the anthraquinone reactive dye dyed textile is a semi-finished pure cotton woven fabric (140g m -2 ) was dyed by the conventional dyeing process of Everzol Blue R (ECI) reactive dyes, and the technological conditions were: 3% (o.m.f.) Everzol Blue R (ECI) reactive dyes, dyeing at 30°C, adding salt to promote dyeing after 10 minutes, and then dyeing at 1°C min -1 After heating up to...

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Abstract

The invention discloses a stripping treatment method for dyed textiles. The method comprises the following steps: using nanometer material as a catalyst, treating the dyed textiles, in particular to defective dyed products, under ultraviolet light in oxygen at 10-100 DEG C so as to reach different required dye effects and repair or redye the textiles; and meanwhile, adding an accelerant to a stripping bath to accelerate or enhance the dye effect. The method adopts strong oxidative free radicals, and the like generated by nanometer material photocatalysis as stripping agents, can obtain satisfactory stripping effect under normal temperature and normal pressure, avoids using a great amount of reducing agents, oxidants, and the like as in a traditional stripping method and can repeatedly usethe nanometer material stripping bath. The stripping technology has clean process, no pollutant generation, good environmental-protection ecological property, simple equipment and process, short flows, high efficiency, energy reduction and consumption and emission reduction.

Description

a technical field [0001] The invention relates to a method for stripping dyed textiles, in particular to a method for photocatalytic ecological stripping of defective dyed textiles with nanometer materials, which belongs to the technical field of textile dyeing and finishing. Background technique [0002] In recent years, domestic and foreign markets have higher and higher requirements for the quality of dyed textiles, especially for the appearance quality of dyed products. Compared with the customer's samples, the dyeing defect, depth, shade, level dyeing, etc. of dyed textiles are usually required to reach level 4 or above before they can be accepted. [J]. Dyeing and Finishing Technology, 2005, 27(12): P30-34]. Therefore, "repair" and even "re-dyeing" of textiles occur from time to time after dyeing. As far as the current situation is concerned, the "repair" rate of general textile printing and dyeing enterprises is around 3%, and some are even higher. For example, when...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P5/15D06P3/60D06P3/70D06P3/24D06P3/82
Inventor 龙家杰管新海程万里
Owner SUZHOU UNIV
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