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Subject: Textile and Apparel Designing × Author: Divya × Start date: 2018 ×
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    ThesisItemOpen Access
    Effect of eco-friendly mordant on dyeability of cotton fabric with anionic dye
    (CCSHAU, Hisar, 2023-02) Divya; Verma, Mona
    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.