Abstract
Biomass pigments have been regarded as promising alternatives to conventional synthetic dyestuffs for the development of sustainable and clean dyeing. This investigation focused on in situ dyeing of fabrics with biopigments derived from tea polyphenols via non-enzymatic browning reaction. The average particle size of dyed residual liquor with natural tea polyphenol was 717.0 nm (ranging from 615.5 to 811.2 nm), and the Integ value of dyed wool fabrics was the greatest compared to those of counterparts. In addition, the Integ values of dyed fabrics with residual liquor were much bigger than those with the first reaction solutions when dyed by identical dyeing liquor. As a result, the dyeing process could be carried out many times because the concentration of the residual liquor was relatively superior. All dyed fabrics acquired admirable rubbing as well as washing fastness, and the relevant dyeing mechanism has been analysed in the paper.
Highlights
As green and sustainable development has become the needed trend, a constantly increasing interest in biomass pigments has been aroused in the textile industry in recent years [1,2]
It was declared that the Integ values of modified cotton fabrics were greater compared to those of counterparts when dyed by identical dye liquor
We could make out that the Integ values of dyeing liquor with natural tea polyphenols were bigger compared to that of colourless Tea polyphenol (TP) as a whole, the possible reason being that the structure of colourless TP was destroyed during the decolourization process
Summary
As green and sustainable development has become the needed trend, a constantly increasing interest in biomass pigments has been aroused in the textile industry in recent years [1,2]. That is regarded as an ecological and sustainable dyeing technology to address environmental contamination issues caused by the application of synthetic dyestuffs [3,4,5]. Biomass pigments are better than synthetic dyestuffs that are applied currently [6], especially with regard to aspects concerning sustainability of the source, environmental conservation during manufacture and the ecology of dyed textiles [7,8]. Biomass pigments have broad application prospects if they are applied to underclothes, and provide new opportunities for the production of high-end ecological textiles [9,10].
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