Cationization of Periodate Oxidized Cotton Cellulose of Muslin Fabric Using Natural Amino Acid Extract from Soya Bean Seed Waste and Its Eco-Friendly Dyeing

摘要

Bleached cotton fabric pre-oxidized with NaIO4 (oxy-cotton) was chemically modified with natural amino acids extracted from soyabean seed waste by pad-dry-calendaring process to investigate the changes in textile properties and its dyeability with reactive dye. This soya protein modified cotton (soya-cotton) incorporates new functional groups producing-NH3+or-NH+-ion (cationic groups) in acid bath to obtain cationized cotton rendering it to salt free reactive dyeing with acceptable shade depth and mechanical properties. Bi-functional High exhaustion reactive dye shows better dye uptake than mono-functional cold brand as well as hot brand reactive dye. Moreover, application of dye fixing agent further improves surface color depth (K/S) of the soya modified cotton fabric. Study of surface morphology of said chemically modified cotton substrate indicate surface anchorage of treated amino acids on the oxy-cotton fabric surface than control cotton fabric. Corresponding reaction mechanism for such modifications were analyzed with FTIR spectroscopy .Finally it is revealed that oxidized cotton treated with soyabean seed waste extract provide a new route of acid bath salt free reactive dyeing showing higher dye uptake.