Effect of eco-friendly mordant on dyeability of cotton fabric with anionic dye
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Date
2023-02
Authors
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Publisher
CCSHAU, Hisar
Abstract
Textile industry is considered as one of the most ecologically harmful industry in the world.
There is need to approach new strategies, methods, material for dyeing treatment for environmentally
friendly modification of cotton fibres for improvement of dyeability of cotton fabric with anionic dyes.
To achieve the objectives of the study, different types of mordants with different direct dyes, were tried
and one mordant and one direct dye was selected on the basis of colour properties of dyed fabrics. MMW
chitosan and direct red dye was selected for further standardization work. Standardization of mordant
treatment and dyeing process was done on the basis of percent dye absorption, colour strength (K/S) value
and wash fastness grades (CC) for different variables. Application of standardized MMW chitosan and
direct red dye was given on cotton fabric using exhaust method. It was found that the chitosan treated
dyed cotton fabric showed higher dye absorption (71.20%), colour strength (14.01), wash fastness rating
very good (4/5) than SSSC treated dyed cotton fabric having dye absorption (68.56%), colour strength
(10.46 K/S) and good (4) wash fastness. The MMW chitosan treated dyed fabric showed higher crease
recovery (100 degree) than SSSC treated dyed (94.1 degree) cotton fabric. The MMW chitosan treated
dyed fabric showed increased percent reduction in bacterial growth against E. coli (85.51%) and S. aureus
(86.20%) bacteria than SSSC treated dyed cotton fabric, 17.75% and 18.22% respectively. The MMW
chitosan treated dyed cotton fabric reflected the higher UPF value (213.94) than with SSSC treated dyed
cotton fabric (110.35). MMW chitosan treated dyed fabrics demonstrated better antibacterial and ultraviolet
protection property than SSSC treated dyed fabrics. Thus, it was concluded that MMW chitosan
treatment can enhance the colour properties of cotton fabric without using any harsh chemicals and is
capable enough to replace the use of metallic salts/electrolytes in the dyeing of cotton fabric with anionic
dyes. The chitosan treatment along with direct red dye played an important role in imparting the multifunctionality
to cotton fabric by imparting UV protection, bacterial resistance and crease resistance in
efficient way with eco-friendly and safe mordant method which will curtail the pollution load on
environment.