Blue lyocell fabric for dyeing hyacinth as vegetable dye and preparation method of blue lyocell fabric

A technology of vegetable dyes and hyacinths is applied in the field of blue lyocell fabrics and their preparation to achieve the effects of simplifying the dyeing process, reducing environmental pollution and saving costs

Active Publication Date: 2021-02-05
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Literature research and market research found that lyocell fabrics dyed with natural dyes have not been reported yet and need to be further developed

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Blue lyocell fabric for dyeing hyacinth as vegetable dye and preparation method of blue lyocell fabric
  • Blue lyocell fabric for dyeing hyacinth as vegetable dye and preparation method of blue lyocell fabric
  • Blue lyocell fabric for dyeing hyacinth as vegetable dye and preparation method of blue lyocell fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The preparation method of the blue lyocell fabric that dyeing of vegetable dye hyacinth is made, described method comprises the steps:

[0038] (1) Extraction of blue toner: pick the hyacinth petals, wash them first and mash them, and use supercritical CO 2 Extraction, the pressure is 30MPa, the extraction temperature is between 45°C, the extraction time is 3h, CO 2 The flow rate is: 14L / h, ethanol is used as an entrainer, the extract is distilled under reduced pressure at 70°C for 4 hours, the pressure is -40kPa, the ethanol solvent is removed, and the blue toner is prepared for use.

[0039] (2) Preparation of modified blue vegetable dye: In 40mL of aqueous solution, add 1g of blue toner prepared in step (1), 4mL of 5wt% formaldehyde aqueous solution and 0.2g of 1-amino-2-sulfate ethyl sulfone ethane , use 30wt% NaOH lye to adjust the pH of the reaction solution to 10.5, keep stirring, the reaction time is 70 minutes, the reaction temperature is 60 ° C, after the rea...

Embodiment 2

[0047] The preparation method of the blue lyocell fabric that dyeing of vegetable dye hyacinth is made, described method comprises the steps:

[0048] (1) Extraction of blue toner: pick the hyacinth petals, wash them first and mash them, and use supercritical CO 2 Extraction, the pressure is 25MPa, the extraction temperature is between 40°C, the extraction time is 1 h, CO 2 The flow rate is: 10L / h, ethanol is used as an entrainer, the extract is distilled under reduced pressure at 60°C for 3 hours, the pressure is -30kPa, the ethanol solvent is removed, and the blue toner is prepared for use.

[0049] (2) Preparation of modified blue vegetable dye: In 30mL of aqueous solution, add 1g of blue toner prepared in step (1), 3mL of 5wt% formaldehyde aqueous solution and 0.1g of 1-amino-2-sulfate ethyl sulfone ethyl alkane, adjust the pH of the reaction solution with 30wt% NaOH lye to be 10.2, stir constantly, the reaction time is 60 minutes, and the reaction temperature is 55 ° C. ...

Embodiment 3

[0057] The preparation method of the blue lyocell fabric that dyeing of vegetable dye hyacinth is made, described method comprises the steps:

[0058] (1) Extraction of blue toner: pick the hyacinth petals, wash them first and mash them, and use supercritical CO 2 Extraction, the pressure is 40 MPa, the extraction temperature is between 50°C, the extraction time is 5 h, CO 2 The flow rate is: 18L / h, ethanol is used as an entrainer, the extract is distilled under reduced pressure at 80°C for 5 hours, the pressure is -50kPa, the ethanol solvent is removed, and the blue toner is prepared for use.

[0059] (2) Preparation of modified blue vegetable dye: In 50mL of aqueous solution, add 1g of blue toner prepared in step (1), 5mL of 5wt% formaldehyde aqueous solution and 0.3g of 1-amino-2-sulfate ethyl sulfone ethyl alkane, adjust the pH of the reaction solution with 30wt% NaOH lye to be 10.9, stir constantly, the reaction time is 80 minutes, and the reaction temperature is 65 ° C....

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention relates to a blue lyocell fabric for dyeing hyacinth as a vegetable dye and a preparation method of the blue lyocell fabric. The preparation method of the blue lyocell fabric comprises the following steps that blue toner is extracted from hyacinth petals, and then the blue toner and prepared 1-amino-2-sulfate ethyl sulfone ethane are chemically modified to prepare a modified blue vegetable dye; secondly, the lyocell fabric and the modified blue vegetable dye are dyed in a dyeing machine; and finally, the dyed lyocell fabric is subjected to cold water washing, soap boiling, waterwashing and drying to obtain the blue lyocell fabric. According to the blue lyocell fabric for dyeing the hyacinth as the vegetable dye and the preparation method of the blue lyocell fabric, the bluepigment of the hyacinth petals with low reaction activity is changed into the vegetable dye with high reaction activity; in addition, other dye assistants such as mordants, dyeing promoters and the like are not required to be added in the dyeing process, so that the dyeing process is simplified, and the cost is saved; meanwhile, the environmental pollution caused by dyeing is reduced; and the dyedblue lyocell fabric has a high K/S value, and the color fastness to soaping and the color fastness to dry rubbing are high in grade.

Description

technical field [0001] The invention belongs to the technical field of fabric preparation, and in particular relates to blue lyocell fabric dyed with plant dye hyacinth and a preparation method thereof. Background technique [0002] Natural dyes usually refer to dyes that have not been artificially synthesized, have little or no chemical processing, and are generally dyes obtained from animal, plant or mineral resources. Since the synthesis of aniline violet in 1856, synthetic dyes have quickly occupied the market and replaced natural dyes because of their rich colors, high dyeing efficiency, complete color spectrum, and low price. However, there are more and more problems in the production and use of synthetic dyes, such as water pollution, soil pollution, poor air quality, and the production of disease-causing and carcinogenic substances, which have caused people to worry. Natural dyes produced from nature are not only environmentally friendly, non-toxic, and biodegradabl...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/34D06P5/02
CPCD06P1/34D06P5/02Y02P20/54
Inventor 周凡雨彭雄义邓健董雄伟李强蔡亚军刘仰硕蔡映杰
Owner WUHAN TEXTILE UNIV
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