The current study is aimed to explore the sustainable dyeing approach of silk fabric with turmeric powder using tannin as mordant extracted from tamarind seed coat. For that, tamarind seed coat tannin was extracted an...The current study is aimed to explore the sustainable dyeing approach of silk fabric with turmeric powder using tannin as mordant extracted from tamarind seed coat. For that, tamarind seed coat tannin was extracted and applied as natural mordant alone and in combination with metal mordant namely copper sulphate for dyeing silk fabric with the extract of turmeric powder. Dyeing parameters such as temperature, time and mordant concentration were varying for optimizing the process. The color strength, color coordinates, color fastness to wash, perspiration, water and rubbing were evaluated for examining dyeing performance. Firstly, tannin was extracted from tamarind seed coat and applying on the silk fabric at 95°C temperature for 45 min by varying concentration. Among them 15 g/l shows better results. Some samples were mordanted with both 15 g/l extracted tannin and 0.5% copper sulphate solution. The mordanted samples were dyed with turmeric dye by varying the time and temperature. By analyzing the test results, the sample mordanted with extracted tannin showed high color strength and good fastness properties dyeing at 80°C for 60 min. The application of 0.5% copper sulphate mordant enhanced sustainable wash fastness properties.展开更多
Metallic salts are often added as extra mordant when dyeing the fabrics with natural dyes. Eichhornia crassipes,namely water hyacinth( WH),is an environmentally problematic aquatic weed with high affinity for metals. ...Metallic salts are often added as extra mordant when dyeing the fabrics with natural dyes. Eichhornia crassipes,namely water hyacinth( WH),is an environmentally problematic aquatic weed with high affinity for metals. In this paper,WH was selected as the source of natural mordant dyes,and extracted by absolute ethyl alcohol using a soxhlet apparatus. The colorants in WH were extracted and separated by column chromatography and thin layer chromatography( TLC). UV-visible spectrophotometer( UV-VIS),mass spectrometry, chemical identification with chromogenic reaction,and Fourier transform infrared spetroscopy( FTIR) were used to identify the main components of each pigment band. The total metal contents before and after extracting of the WH were determined by using an inductively coupled plasma atomic emission detector. The WH extracts were then used to dye wool fabric. The dyeing properties of WH extracts with and without metal mordant were investigated and compared. The results show that the main components of WH extracts are pheophytin and phyllins. The major metallic elements identified in WH are magnesium, manganese,zinc,and iron. Samples dyed with WH extracts without metal mordant exhibits high K / S values and good dyeing properties. This study indicates that the WH extracts can be used as a natural mordant dye on wool fabrics directly.展开更多
With the continuous development of society,the dyeing and finishing field is transitioning towards green sustainability and multifunctionality.The main direction is to dye fabrics using natural dyes with the aid of mo...With the continuous development of society,the dyeing and finishing field is transitioning towards green sustainability and multifunctionality.The main direction is to dye fabrics using natural dyes with the aid of mordants.In recent years,the technology of biological mordant dyeing with natural dyes has become a research hotspot.This paper first discusses in detail the application of biological mordant technology with natural dyes on various types of dyed fabrics,including plant fibers,animal fibers,and synthetic fibers.It then introduces the application of biological mordant dyeing with natural dyes in fields such as antibacterial and ultraviolet protection.By comparing the environmental impact and effectiveness of metal mordants versus biological mordants on dyed fabrics,the most suitable mordant is identified.Finally,the paper provides an outlook on the optimization of the dyeing process,in-depth exploration of mechanisms,rational selection of resources,and functional application trends of biological mordant technology with natural dyes,aiming to provide a reference for research directions in this field.展开更多
Environmental concerns over synthetic dyes,including water pollution and high energy demands,have driven interest in sustainable alternatives.This research investigates the colouration of polyamide 6(nylon 6)textiles ...Environmental concerns over synthetic dyes,including water pollution and high energy demands,have driven interest in sustainable alternatives.This research investigates the colouration of polyamide 6(nylon 6)textiles using a natural dye derived from the mature pods of Cassia fistula,which serve as a source of anthraquinone-based pigments.The study systematically evaluated the influence of dyeing parameters-namely temperature(30-90℃),duration(10-60 min),pH range(4-11),dye concentration(10%-70%owf),and post-mordanting using alum,ferrous sulfate,and stannous chloride-on the resulting colour strength(K/S)and CIE Lab*coordinates.The fastness characteristics of polyamide 6 fabric were assessed,with the corresponding results detailed in the subsequent sections.Maximum dye absorption was achieved at 90℃for 60 minutes under acidic conditions(pH 4),and from the conditions was given K/S 2.242.An increase in dye concentration led to higher K/S values,which were further augmented by mordanting,with aluminum potassium sulfate and stannous chloride yielding the greatest results.Colour fastness assessments indicated good to excellent resistance to washing,water exposure,rubbing,and perspiration,all of the properties were up to 4.Whereas resistance to light was found from 1 to 2.The findings confirm Cassia fistula extract as a renewable,eco-friendly dye for polyamide 6,offering commercially viable colour strength and fastness while supporting sustainable textile processing.展开更多
文摘The current study is aimed to explore the sustainable dyeing approach of silk fabric with turmeric powder using tannin as mordant extracted from tamarind seed coat. For that, tamarind seed coat tannin was extracted and applied as natural mordant alone and in combination with metal mordant namely copper sulphate for dyeing silk fabric with the extract of turmeric powder. Dyeing parameters such as temperature, time and mordant concentration were varying for optimizing the process. The color strength, color coordinates, color fastness to wash, perspiration, water and rubbing were evaluated for examining dyeing performance. Firstly, tannin was extracted from tamarind seed coat and applying on the silk fabric at 95°C temperature for 45 min by varying concentration. Among them 15 g/l shows better results. Some samples were mordanted with both 15 g/l extracted tannin and 0.5% copper sulphate solution. The mordanted samples were dyed with turmeric dye by varying the time and temperature. By analyzing the test results, the sample mordanted with extracted tannin showed high color strength and good fastness properties dyeing at 80°C for 60 min. The application of 0.5% copper sulphate mordant enhanced sustainable wash fastness properties.
基金the Fundamental Research Funds for the Central Universities,China(No.2011D10543)
文摘Metallic salts are often added as extra mordant when dyeing the fabrics with natural dyes. Eichhornia crassipes,namely water hyacinth( WH),is an environmentally problematic aquatic weed with high affinity for metals. In this paper,WH was selected as the source of natural mordant dyes,and extracted by absolute ethyl alcohol using a soxhlet apparatus. The colorants in WH were extracted and separated by column chromatography and thin layer chromatography( TLC). UV-visible spectrophotometer( UV-VIS),mass spectrometry, chemical identification with chromogenic reaction,and Fourier transform infrared spetroscopy( FTIR) were used to identify the main components of each pigment band. The total metal contents before and after extracting of the WH were determined by using an inductively coupled plasma atomic emission detector. The WH extracts were then used to dye wool fabric. The dyeing properties of WH extracts with and without metal mordant were investigated and compared. The results show that the main components of WH extracts are pheophytin and phyllins. The major metallic elements identified in WH are magnesium, manganese,zinc,and iron. Samples dyed with WH extracts without metal mordant exhibits high K / S values and good dyeing properties. This study indicates that the WH extracts can be used as a natural mordant dye on wool fabrics directly.
基金College Student Innovation and Entrepreneurship Training Program Project(X202413561129)。
文摘With the continuous development of society,the dyeing and finishing field is transitioning towards green sustainability and multifunctionality.The main direction is to dye fabrics using natural dyes with the aid of mordants.In recent years,the technology of biological mordant dyeing with natural dyes has become a research hotspot.This paper first discusses in detail the application of biological mordant technology with natural dyes on various types of dyed fabrics,including plant fibers,animal fibers,and synthetic fibers.It then introduces the application of biological mordant dyeing with natural dyes in fields such as antibacterial and ultraviolet protection.By comparing the environmental impact and effectiveness of metal mordants versus biological mordants on dyed fabrics,the most suitable mordant is identified.Finally,the paper provides an outlook on the optimization of the dyeing process,in-depth exploration of mechanisms,rational selection of resources,and functional application trends of biological mordant technology with natural dyes,aiming to provide a reference for research directions in this field.
文摘Environmental concerns over synthetic dyes,including water pollution and high energy demands,have driven interest in sustainable alternatives.This research investigates the colouration of polyamide 6(nylon 6)textiles using a natural dye derived from the mature pods of Cassia fistula,which serve as a source of anthraquinone-based pigments.The study systematically evaluated the influence of dyeing parameters-namely temperature(30-90℃),duration(10-60 min),pH range(4-11),dye concentration(10%-70%owf),and post-mordanting using alum,ferrous sulfate,and stannous chloride-on the resulting colour strength(K/S)and CIE Lab*coordinates.The fastness characteristics of polyamide 6 fabric were assessed,with the corresponding results detailed in the subsequent sections.Maximum dye absorption was achieved at 90℃for 60 minutes under acidic conditions(pH 4),and from the conditions was given K/S 2.242.An increase in dye concentration led to higher K/S values,which were further augmented by mordanting,with aluminum potassium sulfate and stannous chloride yielding the greatest results.Colour fastness assessments indicated good to excellent resistance to washing,water exposure,rubbing,and perspiration,all of the properties were up to 4.Whereas resistance to light was found from 1 to 2.The findings confirm Cassia fistula extract as a renewable,eco-friendly dye for polyamide 6,offering commercially viable colour strength and fastness while supporting sustainable textile processing.
