Loading...
Theses
Browse
1 results
Search Results
ThesisItem Open Access Effect of biomordants on dyeability of cotton fabric with natural dye(CCS HAU, Hisar, 2020-07) Neeta; Arya, NishaIncreasing concern about environmental pollution in all sphere of life has raised grave concern and heated debates around the world about the concept of ecology and environment. In the present time, commercially viable alternative methods for preparing and finishing cotton substrates based on the use of biomordants have emerged. Keeping in view the current scenario of environmental consciousness, the present study has been planned to assess the effect of biomordant on dyeing efficacy of cotton with natural dye substituting metal based mordant and salts. Standardization of biomordanting process for two biomordants i.e. harad and heena was done on the basis of dye absorption, colour strength and wash fastness rating for different concentrations and treatment conditions. The desized and scoured fabric were pre-treated with selected two biomordants and dyed with selected natural dye. Scanning Electron Microscopic (SEM) analysis of biomordanted fabric samples. SEM analysis demonstrated plain surface of biomordant treated sample. The colour coordinates, colour strength and colour fastness of the biomordant treated dyed samples were assessed. Various mechanical, performance and functional properties of the biomordant treated dyed fabric were also tested. Comparative analysis was also done between scoured fabric treated with biomordants and dyed with natural dye. The parameter optimized for biomordanting process of scoured fabric were pre mordanting stage with 5 and 10 per cent concentration, 1:30 M: L Ratio, 6 and 4 pH, 60° and 80°C treatment temperature and 60 and 45 minutes treatment time for heena and harad, respectively. Both the biomordant treated dyed samples exhibited good (4) to very good (4/5) colour fastness properties. The results revealed that among both the biomordants treated dyed fabrics, heena treated dyed fabric showed maximum increase in bending length (2.39 cm) and heena treated dyed sample showed highest increase in elongation (29.68%), crease recovery angle (113 degree), moisture regain (10 %) and wickability (3.86cm). The heena treated and Babool bark dyed fabric showed the highest UPF value (56.89) indicating excellent protection category while in harad treated dyed fabric UPF value was (48.76). The biomordants treated dyed fabrics showed bacterial resistance against E. coli (93.35%) and S. aureus (88.07%). Thus, it is concluded that biomordants treatment enhanced the dyeing efficacy of the cotton fabric with better colour fastness properties. The biomordant treatment and Babool bark dye improved the mechanical and performance properties of cotton fabric with very good to excellent protection from UV radiation and bacterial attack. Hence, the biomordants are suitable replacement materials for cotton fabric in textile wet processing due to their positive response towards environment and no harmful effect on fabric properties.