Journal of Textile Science & Engineering

For dyeing the cotton fabric with vat dyes, first it is required to reduce the dye using reducing agents. The reduction potential of reducing agent has to be matched with the dye for proper dyeing. Otherwise the problem of over reduction and under reduction may arise and leads to the change in shade. In conventional vat dyeing process, the vat dye is dissolved using hydrose, which is a powerful reducing agent followed by solubilizing with sodium hydroxide. This process creates very high pollution problem. In this study, an attempt has been made to replace hydrose by ferrous sulphate and hydrose combination as reducing agent on cotton fabric dyeing with vat dye and the results are compared with those of the treatment with conventional hydrose in terms of depth of shade, color fastness, color difference, tensile strength and effluent parameters. Among the ferrous sulphate + Hydrose combinations, 0.5g/L (10%) ferrous sulphate + 4.5g/L (90%) hydrose and 2g/L (40%) ferrous sulphate + 3g/L (60%) hydrose combinations as reducing agents give very good dyeing effect on the dyed cotton fabric with Bezathren Blue RS and Red LGG vat dyes respectively. These ferrous sulphate + hydrose combinations as reducing agents results higher color strength, lower BOD and COD values and higher fabric strength than hydrose. Therefore, hydrose can be replaced by ferrous sulphate + hydrose combinations depending on the reduction potential of a dye and by controlling the NaOH amount during dyeing.

In this study three starches viz, potato, corn and cassava have been comparatively studied for their performance on sized 34 Nm Ring spun yarn. The properties of the constructed fabric in terms of tensile strength and elongation, abrasion resistance, stiffness character, fabric thickness, size removal percentage after desizing and End breakage rate on the loom was observed to check the weaving efficiency. From the test analysis, it was clear that the cassava starch was showing overall better performance followed by potato and corn starches.

In the present investigation environment-friendly effective technique was used for silk sericin extraction from waste silk cocoon. Silk sericin powder was extracted from an only boiled water solution of silk cocoons without using any chemicals. Extracted sericin powder was characterized by UV spectrophotometer, Fourier transform infrared (FTIR) and Thermogrametric Analysis (TGA). The crystalline index and crystallite diameter of silk sericin were investigated by X-ray diffraction (XRD). The crystalline index and crystallite diameters were found 39.66% and 2.179 nm respectively for silk sericin. The functional properties in terms of antimicrobial activity and antioxidant property were also evaluated. The antioxidant activity was evaluated by 2, 2-diphenyl-1-picrylhydrazyl (DPPH) radicals. The results showed that silk sericin had a strong scavenging capacity for DPPH radicals.

This paper presents the impact of modified glyoxalic (DMDHEU) and co-polymer acrylic crosslinkers effect on the Crystallinity, Crystallite Size and mechanical properties of finished cotton. Using a modern technical analysis is very significant to describe the outside modification of cellulose fiber and the inside of crystalline region. The obtained results make clear the morphology cross-linking aspect after the treatment of resin with the previously cited Crosslinkers. Benchmarking the effect of used Crosslinkers at various finishing conditions (curing temperature, curing time, drying temperature, drying time and crosslinkers concentration) on crystallinity, crystallite size and surface morphology of finished cotton, is the answer of durable press application problems. It inspects the modified glyoxalic crosslinkers upshot more than acrylic crosslinkers on mechanical properties of cotton yarns. It proves that crystallinity index and crystallite size distinction of treated cotton have a way to link with cellulose physical properties, such as the ability to cross-link in amorphous region. The results also describe the effect of two crosslinkers on the fall mechanical properties of treated cotton. They show an important change on retention of breaking strength and elongation, creep and relaxation rate of treated cotton.