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A rapid chromatographic identification method for plant-dyed cotton fabrics and chemically-dyed cotton fabrics

A cotton fabric and plant dyeing technology, applied in the textile field, can solve the problems of not being able to identify all colors or types, the identification results are not obvious, and have no versatility, etc., and achieve the effects of simple operation, simple identification, and short time-consuming.

Active Publication Date: 2022-04-05
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the above methods lack strict scientific proof. More importantly, the identification results of the above methods are not obvious, and cannot identify all colors or types, and are not universal.

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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The raw material is chemically dyed red cotton fabric, and the rapid identification method includes the following steps:

[0034] In the first step, 1 g of chemically dyed red cotton fabric is weighed and placed in an ultrasonic cleaner for cleaning for 5 minutes.

[0035] In the second step, put the red cotton fabric after ultrasonic cleaning into a 50mL beaker, and add 20mL of sodium hydroxide solution with a mass fraction of 10%, heat the solution to boiling, stop heating and place the beaker in a 1000mL beaker Ultrasonic treatment in an ultrasonic cleaner with 700 mL of distilled water for 2 minutes, and then the cotton fabric was taken out, red dye was eluted from the residual solution, and the solution was red, and the residual solution was retained for further identification.

[0036] The third step is to make the white silica gel plate used for chromatographic development into a 2*10cm long strip, transfer 100 μL of residual liquid to the lower part of the silic...

Embodiment 2

[0039] The raw material is chemically dyed yellow cotton fabric, and the rapid identification method includes the following steps:

[0040] In the first step, 1 g of chemically dyed yellow cotton fabric is weighed, and first placed in an ultrasonic cleaner for cleaning for 5 minutes.

[0041] In the second step, put the yellow cotton fabric after ultrasonic cleaning into a 50mL beaker, and add 20mL of sodium hydroxide solution with a mass fraction of 6%, heat the solution to boiling, stop heating and place the beaker in a 1000mL beaker Ultrasonic treatment in 700mL distilled water ultrasonic cleaner for 3min, then take out the cotton fabric, the yellow dye is eluted in the residual liquid, the solution is yellow, and the residual liquid is reserved for the next step of identification.

[0042]The third step is to make the white silica gel plate used for chromatographic development into a 2*10cm long strip, and use a pipette gun to transfer 100 μL of residual liquid to the lowe...

Embodiment 3

[0045] The raw material is plant-dyed red cotton fabric, and the rapid identification method includes the following steps:

[0046] In the first step, 1 g of plant-dyed red cotton fabric is weighed, and placed in an ultrasonic cleaner for cleaning for 5 minutes.

[0047] In the second step, put the red cotton fabric after ultrasonic cleaning into a 50mL beaker, and add 20mL of sodium hydroxide solution with a mass fraction of 3%, heat the solution to boiling, stop heating and place the beaker in a 1000mL beaker Ultrasonic treatment in 700mL distilled water ultrasonic cleaner for 1min, then take out the cotton fabric, the red dye eluted in the residual solution, the solution was purple, and the residual solution was reserved for the next step of identification.

[0048] The third step is to make the white silica gel plate used for chromatographic development into a 2*10cm long strip, transfer 100 μL of residual liquid to the lower part of the silica gel plate (about 0.5 cm from...

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 discloses a chromatographic rapid identification method for vegetable dyed cotton fabrics and chemically dyed cotton fabrics, comprising the following steps: placing the dyed cotton fabrics in an ultrasonic cleaner, and ultrasonically cleaning them at normal temperature; placing the ultrasonically cleaned cotton fabrics in a Put it into a beaker, add sodium hydroxide solution, heat it to boiling, stop heating, and then carry out ultrasonic treatment; then take out the cotton fabric, and keep the residual liquid for the next step of identification; make a long strip of white silica gel plate for chromatographic development , use a pipette to transfer 100 μL of residual liquid to the lower part of the silica gel plate; immerse the bottom of the silica gel plate in the developing agent, then quickly extract the solution, and place the silica gel plate in a dry and ventilated place to stand; observe the silica gel plate, if the silica gel plate is white , the above-mentioned cotton fabrics are chemically dyed cotton fabrics; if there are still color spots on the silica gel plate, the above-mentioned cotton fabrics are plant-dyed cotton fabrics. The invention has the advantages of quick analysis, simple operation and simple interpretation, and solves the problem of difficult identification of existing plant dyeing products on the market.

Description

technical field [0001] The invention relates to the field of textiles, in particular to a rapid chromatographic identification method for plant-dyed cotton fabrics and chemically-dyed cotton fabrics. Background technique [0002] Vegetable dyes are extracted from natural plants, and are generally used to dye loose cotton fabrics and then processed into textiles. In recent years, due to the advantages of greenness and safety brought by the natural properties of plant dyes, they have been praised by manufacturers and consumers, so the output of plant dyes has increased year by year. [0003] Existing a large amount of vegetable dyeing products circulates on the market now, and it satisfies the needs of different consumers simultaneously with chemical dyeing products. However, so far, there is no standard identification method for plant dyes and chemical dyes. This has resulted in the occurrence of counterfeit plant dyed products in some chemical dyed products on the market. ...

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 Patents(China)
IPC IPC(8): G01N21/29G01N19/04
Inventor 韩光亭姜伟周成凤辛玉军姜展
Owner QINGDAO UNIV