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Finishing method for deepening and stabilizing colors of natural green cottons

A green cotton, natural technology, applied in the direction of solvent dyeing, etc., can solve the problems of large color difference change, color instability, etc., to achieve the effect of color deepening, critical conditions are easy to achieve, and the environment is pollution-free

Inactive Publication Date: 2011-09-21
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the existing research literature, the metal salt treatment method published by Gu Yan et al. can obviously deepen the color of colored cotton fibers, but the color after metal salt treatment is less stable under conditions such as dry heat and sunlight, and the color difference is greater than that of untreated samples.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1, a kind of finishing method that the color of natural green cotton deepens and stabilizes, carries out following steps successively:

[0029] 1) Soak 10g of natural green cotton fiber in acetone at a room temperature of 20°C for 10 hours, and then dry it naturally for 48 hours to obtain pretreated cotton fiber; after routine inspection, the pretreated cotton fiber does not contain acetone ( i.e. the acetone content is negligible).

[0030] 2) Put the above pretreated cotton fiber into the dye kettle in the HA supercritical fluid dyeing apparatus, add 30ml of ethanol with a volume fraction of 95% as an entrainer, and fill 10g of absorbent cotton in the dyeing kettle, and then pass it into For carbon dioxide gas, adjust the pressure and temperature of the equipment, and treat it for 2 hours under the conditions of a pressure of 40MPa and a temperature of 40°C. CO as a supercritical fluid 2 Cycles between Dye Kettle and Dye Kettle.

[0031]After treatment, ...

Embodiment 2

[0034] Embodiment 2, a kind of finishing method that the color of natural green cotton deepens and stabilizes, carries out following steps successively:

[0035] 1) Soak 10g of natural green cotton fiber in petroleum ether at room temperature 25°C for 5 hours, and then dry it naturally for 48 hours to obtain the pretreated cotton fiber; after routine inspection, the pretreated cotton fiber does not contain petroleum ether (i.e. the content of petroleum ether is negligible).

[0036] 2) Put the above-mentioned pretreated cotton fibers into the dye kettle in the HA supercritical fluid dyeing apparatus, add 30ml of ethanol with a volume fraction of 95% as an entrainer, and fill 6g of absorbent cotton in the dyeing kettle, and then pass in carbon dioxide Gas, adjust the pressure and temperature of the equipment, and treat it for 3 hours under the conditions of a pressure of 35MPa and a temperature of 60°C.

[0037] After the cotton fiber is treated, the color index changes as △L=...

Embodiment 3

[0039] Embodiment 3, a kind of finishing method that the color of natural green cotton deepens and stabilizes, carries out following steps successively:

[0040] 1) Soak 10g of natural green cotton fiber in n-hexane at a room temperature of 20°C for 8 hours, and then dry it naturally for 48 hours to obtain pretreated cotton fiber; after routine inspection, the pretreated cotton fiber does not contain n-hexane (i.e. the content of n-hexane is negligible).

[0041] 2) Put the above pretreated cotton fibers into the dye tank of the HA supercritical fluid dyeing machine, add 25ml of ethanol with a volume fraction of 95% as an entrainer, and fill the dyeing tank with 5g of absorbent cotton, and then pass in carbon dioxide Gas, adjust the pressure and temperature of the equipment, and treat it for 3 hours under the conditions of a pressure of 30MPa and a temperature of 65°C.

[0042] The color index changes of cotton fiber after treatment are △L=-15.08, △a=-0.03, △b=-6.73, △E=16.52...

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PUM

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Abstract

The invention discloses a finishing method for deepening and stabilizing colors of natural green cottons. The method comprises the following steps: 1) putting natural green cotton fibers in a solvent to carry out soaking pretreatment and naturally airing the natural green cotton fibers after treatment to obtain the pretreated cotton fibers; and 2) selecting a supercritical fluid dyeing machine with a dye kettle and a dyeing kettle; and filling the dyeing kettle with a bulky material liable to color staining, putting the pretreated cotton fibers in the dye kettle of the supercritical fluid dyeing machine and taking the ethanol with the volume fraction of 94-96% as an entrainer and CO2 as a supercritical fluid to treat the pretreated cotton fibers for 2-4 hours under the pressure of 20-40MPa and temperature of 40-70 DEG C. The natural green cotton fibers treated by the method have the characteristics of deepened, uniform and stabilized colors and the like.

Description

technical field [0001] The invention belongs to the field of textile science and engineering, and relates to a finishing method for deepening and stabilizing the color of natural green cotton fibers. Background technique [0002] Natural colored cotton is a natural colored cotton variety. Domestic and foreign literature reports have developed colored cotton varieties in various colors such as green, brown, yellow, pink, blue, and black. Mainly green and brown. Because the fiber is naturally colored, it does not need to be dyed in textile processing, which can reduce processing costs, reduce sewage discharge, and is beneficial to environmental protection. It is an ecological fiber and has broad development prospects. According to the prediction of the International Organic Agriculture Committee in 2000: in the next 50 years, the output of natural colored cotton will account for about 30% of the total cotton output, and 60%-70% of the world's population will use colored cotto...

Claims

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Application Information

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IPC IPC(8): D06B9/02
Inventor 周文龙唐志荣李海祥马明波
Owner ZHEJIANG SCI-TECH UNIV
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