Plant Extracts Are Used In Cotton Fabric Dyeing And Performance Research

In this paper,the extracts of Rhizoma Coptidis and safflower were used to dye cotton knit fabrics,and the dyeing properties and dyeing mechanism of cotton knit fabric dyeing were studied.The mordant mechanism was explored by selecting plant mordant Yaojin Niang root extract and crude root geranium leaf extract instead of metal mordant.On the basis of traditional dyeing,the effect of ultrasonication on dyeing and the effect of dyeing after pretreatment of cotton knit fabrics were explored.Firstly,the three-factor and three-level orthogonal test of direct dyeing was carried out.By comparing the absorbance of the dyeing stock solution and the residual liquid,the color index,color characteristic value and color fastness of the stained cloth sample were analyzed to explore the extract of Rhizoma Coptidis and safflor.In the direct dyeing process parameters and direct dyeing properties of cotton knit fabrics,the preliminary selection of direct dyeing of Coptidis Rhizoma extract is: bath ratio 1:20,Coptis extract concentration 8g/L,temperature 60°C,time 45 min,p H value It is 9;the preferred process for direct dyeing of safflower is: bath ratio 1:20,safflor concentration is 6g/L,temperature is 80 ° C,time is 60 min,p H is 8.By infrared spectroscopy,the directly dyed fabric had berberine extract or safflor;the antibacterial property was tested by halo method,and the dyed fabric had obvious inhibition zone after dyeing,which proved that the fabric was antibacterial after direct dyeing.Secondly,the mordant was dyed with plant mordant,and the three-factor and three-level orthogonal test of mordant dyeing was carried out.The colorimetric index,color eigenvalue and color fastness of the stained swatches were compared and analyzed,and the extracts of berberine and safflor were found in Yao Jinniang.Under the mordant effect of root extract or radix sylvestris leaf extract,it is used for cotton knit mord dyeing process parameters and mord dyeing performance.The yellow color is superior to the process: after the direct dyeing of the extract of Coptidis Rhizome,the extract of the radix sylvestris leaves is mordant,the bath ratio is 1:20,the concentration of the extract of the radix sylvestris leaves is 4g/L,the temperature is 70 ° C,the time is 45 min.Compared with direct dyeing,the wet rubbing fastness is improved by half grade,the soap fastness is improved to half grade,the color fastness of wool is increased by half grade,the acid perspiration cotton and the color fastness of wool are improved by one grade,and the alkali resistance is improved.The color fastness of perspiration is improved by half,the color fastness of cotton stain is increased by one level,the color fastness of wool is increased by one and a half;the red color is superior;the erythromycin is directly dyed after Yaojin Niang root extract and mordant,bath ratio 1 :20,Yao Jin Niang extract concentration of 6g / L,temperature 80 ° C,time 60 min,compared to direct dyeing,its dry rubbing fastness increased by half,wet rubbing fastness increased by one and a half,soap fastness and color change increased half The color fastness of cotton stain is increased by one level,the color fastness of acid perspiration is improved by one level,the color fastness of cotton stain is increased by one and a half,the color fastness of wool is increased by one level,and the color fastness of alkali sweat is improved by one and a half.Grade,the cotton color fastness is improved by one and a half,and the color fastness of the hair is increased by two and a half.The antibacterial property was measured by halo method.The mordant fabric had obvious inhibition zone,which proved that the fabric had antibacterial property after mord dyeing.Then,it was pretreated with raw soybean milk and grass ash to directly stain and mordant dye,and the colorimetric index,color characteristic value and color fastness result of the dyeing swatch were compared and analyzed.For the yellow dyeing results,the ash was soaked and then dyed with a bath ratio of 1:20,the extract of Coptidis Rhizoma was 8g/L,the temperature was 60°C,the time was 45 min,and the p H value was 9 directly dyed cotton knitwear.After the mordant dyeing process,the mordant dyeing process: the concentration of Yaojinniang extract is 4g/L,the temperature is 70°C,and the time is 45 min,the rubbing fastness can be improved,and the dry friction and wet friction can reach 5 grades.After pretreatment,the soap fastness was improved.After soaking in raw soy milk,the medium was dyed.The bath ratio was 1:20,the extract concentration of Coptidis Rhizoma was 8g/L,the temperature was 60 °C,the time was 45 min,and the p H value was For 9 direct dyed cotton knits,the post-morning process is a concentration of 4g/L of the root extract of geranium sylvestris,a temperature of 70 ° C,and a time of 45 min,the color fastness can reach 3-4.For the red dyeing results,after the ash soaking,the medium dyed,the bath ratio was 1:20,the saffron concentration was 6g/L,the temperature was 80°C,the time was 60 min,the p H value was 8 after direct dyeing,and the post mordant process was coarse.The geranium leaf extract concentration is 4g / L,the temperature is 80 ° C,the time is 60 min,the post-mord dyeing can improve the rubbing fastness,the dry friction wet friction can reach 5,and the soap fastness It has also improved,and its color fastness can reach 4 levels.Next,the best techniques of direct dyeing,mordant dyeing and pre-treatment dyeing were selected,and ultrasonic treatment was used respectively.The results showed that the ultrasonic dyeing results did not improve the dyeing color fastness,but the dyeing time could be shortened and the dyeing efficiency could be improved.Through the comparative analysis of the dyeing results under direct,mordant,pretreatment,ultrasonic and other conditions,the best process of the full text is: yellow,after the soaking in soy milk,the medium is dyed,the bath ratio is 1:20,and the concentration of the extract of Coptis is 8g./L,the temperature is 60 ° C,the time is 45 min,the p H value is 9 directly dyed cotton knitted fabric,the post mordant process is the concentration of the extract of the radix sylvestris leaves is 4g / L,the temperature is 70 ° C,the time is 45 min.Red,after the soaking of the ash,the medium is dyed,the bath ratio is 1:20,the saffron concentration is 6g/L,the temperature is 80°C,the time is 60 min,the p H value is 8 after direct dyeing,and the post mordant process is the radix geranium leaves.The extract concentration was 4 g/L,the temperature was 80 ° C,and the time was 60 min.The cotton knit fabric dyed under the optimal process conditions was tested by anti-vibration method.The antibacterial rate of the yellow cotton knit fabric against Staphylococcus aureus was 75.6%,which was greater than the national antibacterial standard of 70%.Its red line has a bacteriostasis rate of 57.7% against Staphylococcus aureus,which has certain antibacterial properties,but the antibacterial effect is not as good as that of the dyed fabric of Coptidis Rhizoma extract.Finally,the cotton fabric with the best process dyeing was selected to make the baby garments.