NEW METHOD OF UNION DYEING OF COTTON/NYLON BLENDED FABRIC USING CHITOSAN NANOPARTICLES

Dyeing of fabric blends such as Cotton/Nylon (C/N) is presently dyed by two-bath or one-bath two-step dyeing. Cellulose fibers when immersed in water produce a negative electrokinetic potential. The negative charge on the fiber repels the anionic dye ions and consequently the exhaustion of the dye bath is limited. When the fabric is treated with chitosan (polyacrylamide), the primary hydroxyl groups of cellulose is partially modified into amide groups, which intern leads the cellulose to act like as polyamide fiber. As a naturally deriving substance, chitosan has several beneficial properties such as being nontoxic and biodegradable. Absorption of acid dyes by chitosan is mostly by electrostatic interactions, the larger surface area of chitosan nanoparticles is advantageous for enhancement of dyeability of textile material. Experimental work was carried out on finding the possibility of one bath dyeing of chitosan pretreated cotton/nylon fabric with acid dyes. The effect of chitosan pretreatment on dyeability, fastness, and few physicochemical properties has been investigated, and results are presented. The cotton/nylon sample treated with 0.3% of chitosan nanoparticles had higher K/S values, washing, and crocking fastness. Also observed, dyed fabric had antibacterial potential due to the antibacterial property of chitosan. New method of union dyeing showed level dyeing having good fastness properties and offers the option of cost effective and eco-friendly