Uklanjanje hidrolizovane reaktivne boje važna je faza rada u bojenju pamuka jer utiče na eksploataciona i higijenska svojstva tekstilnih proizvoda. Kao veliki potrošač vode i hemikalija ovaj radni proces proučava se sa aspekta uštede prirodnih resursa i zaštite životne sredine. U ovom radu pruočavan je učinak sredstava za pranje na bazi tenzida različitog jonogeniteta kao i čiste vode na uklanjanje hidrolizovanih reaktivnih boja različitih funkcionalnih grupa. Dobijeni rezultati upućuju na zaključak da čista voda pri većem odnosu kupatila (1:30) i vremenu pranja 30 min može biti efi kasno sredstvo za uklanjanje hidrolizovane monoreaktivne boje. Kod uklanjanja hidrolizovane bifunkcionalne boje pored odnosa kupatila i vremena pranja i koncentracija tenzida može da ima značajan uticaj na učinak procesa.
Reactive dyes are the most popular dyes for dyeing cellulose fibers. The low affinity of dyes on cotton determines the presence of large amounts of electrolytes and additional substances in the dyeing bath. In recent years, methods for increased use of dyes with minimal consumption of chemicals and natural resources have been popular. The number of ions formed by the dissociation of electrolytes determines the ionic strength of the solution and has a promotional effect on exhaustion and fixation of reactive dyes. In this work, the influence of neutral salts (NaCl and Na2SO4) and alkali salt (Na2CO3) on the color intensity of cotton fabric by reactive dyes has been investigated. A bath with a higher ionic strength of neutral salt has a greater exhaustion of reactive dyes. The addition of an alkaline electrolyte to activate the chemical dye/fiber reaction has an additional promotional effect on the exhaustion of reactive dyes.
Cotton dyeing is usually performed by reactive dyes by exhaustion method. Great quantities of salts and alkalis used in the formulation of dyeing bath eventually get into the watercourses and negatively affect the environment. In this work, studied are the possibilities of reducing salt and alkali concentrations in the dyeing bath in order to reduce water pollution after the dyeing process and soap washing. The obtained results show that the alternative procedures are environmentally more favorable, which is demonstrated by reduced values chemical oxygen demand. High level of dye fixation and fastness was achieved, while the colour intensity was slightly lower in comparison with standard samples.
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