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. 2018 Jan 24;5(1):171134.
doi: 10.1098/rsos.171134. eCollection 2018 Jan.

Eco-dyeing with biocolourant based on natural compounds

Fubang Wang  1   2 , Jixian Gong  1   2 , Yanfei Ren  1   2 , Jianfei Zhang  1   2
Affiliations

Eco-dyeing with biocolourant based on natural compounds

Fubang Wang et al. R Soc Open Sci. .

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.

Keywords: Integ values; biomass pigments; dyeing; residual liquor; tea polyphenols.

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Conflict of interest statement

The authors have no competing interests.

Figures

Figure 1.
Figure 1.
Chemical structural formula of tea polyphenols.
Figure 2.
Figure 2.
Effect of dye liquor on Integ values of dyed cotton fabric.
Figure 3.
Figure 3.
Effect of residual liquor on Integ values of dyed cotton fabric.
Figure 4.
Figure 4.
Effect of dye liquor on Integ values of dyed protein fabric.
Figure 5.
Figure 5.
Effect of residual liquor on Integ values of dyed protein fabric.
Figure 6.
Figure 6.
FTIR spectrums of undyed wool fabric, dyed wool fabric and reaction product between natural TP and glycine.
Figure 7.
Figure 7.
(a) Suspension of natural TP reaction solution; (b) size distribution of natural TP reaction solution.
Figure 8.
Figure 8.
Major conversion pathways of non-enzymatic oxidation reaction between catechin and tea pigments.
See this image and copyright information in PMC

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