Improvement of dyeing and antimicrobial properties of nylon fabrics modified using chitosan-poly(propylene imine) dendreimer hybrid

• The effect of CS-PPI on the dyeability of nylon fabrics was studied.
• Two reactive dyes were applied to investigate the dyeability of nylon fabrics.
• The dyeing property of CS-PPI grafted nylon fabrics was increased.
• Fastness properties of the dyed nylon fabrics have also been discussed.
• The antimicrobial property of CS-PPI grafted nylon fabrics was improved.

Nylon fabric surface modification using chitosan-poly(propylene imine) dendreimer hybrid (CS-PPI) as a novel eco-friendly finishing agent has been reported. Effects of some operational parameters such as pH, temperature, time and CS-PPI concentration on grafting yield were examined through dye up-take using two commercial reactive dyes in terms of color strength (K/S). FTIR, SEM, and DSC data confirmed the grafting of CS-PPI onto nylon substrate. Optimal grafting values obtained were pH 4, temperature 60 °C, time 6 h and 2.5 g/L CS-PPI concentration. The performance of CS-PPI grafted nylon was investigated in terms of its dyeability, color fastness, and antimicrobial properties.

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