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2022, vol. 11, br. 2, str. 62-66
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Prednosti bojenja vunenih vlakana na 60 °C nakon predhodne modifikacije alkoholom
Advantages of dyeing wool fibers at 60 °C after previous modification with alcohol
Sažetak
Ovaj istraživački rad opisuje prednosti bojenja vunenih vlakana na 60 °C nakon predobrade alkoholom. Vuna je prirodno vlakno. Ovo vlakno se može bojiti kiselim, metalkompleksnim i drugim bojama. Kisele boje su rastvorljive u vodi i najčešće se koriste za bojenje vune, svile i najlona. U radu su korišćena vunena vlakna 100% hemijskog sastava. Vuneno vlakno je prethodno obrađeno alkoholom (n-pentanol) na temperaturi od 60 °C tokom 30 minuta. Prethodno obrađena vunena vlakna su obojena bojom Supramin Blau - kisela boja. Vreme bojenja uzoraka vunenih vlakana iznosilo je 5, 10, 20, 30, 40, 50 i 60 minuta. Proces bojenja vunenih vlakana kiselom bojom na 60 °C pokazao je veći stepen iscrpljenosti i kapaciteta adsorpcije kada je vuna prethodno obrađena n-pentanolom u poređenju sa vunom koja nije prethodno obrađena n-pentanolom. Uočeno je konstantno povećanje stepena iscrpljenosti boje na prethodno obrađenom vunenom vlaknu tokom povećanja početne koncentracije boje. Duže vreme bojenja za prethodno obrađenu vunu dovodi do većeg iscrpljivanja boje. Modeli Weber-Morris i Elovich su primenljivi za opisivanje toka adsorpcije jer postoji vrlo malo rasejanja oko idealne krive, tako da funkcionalne prave linije veoma dobro pokrivaju većinu tačaka.
Abstract
This research work describes the advantages of dyeing wool fibers at 60 °C after pre-treatment with alcohol. Wool is a natural fiber. This fiber can be dyed with acid, metal-complex and other dyes. Acid dyes should be soluble in water and most commonly used for dyeing wool, silk and nylon. Wool fibers with 100 % chemical composition were used in this study. The wool fiber was pre-treated in alcohol (npentanol) at a temperature of 60 °C for 30 minutes. Pre-treated wool fibers were dyed with Supramin Blau acid dye. The time for dyeing samples of wool fibers was 5, 10, 20, 30, 40, 50 and 60 minutes. The process of dyeing wool fibers with acid dye at 60 °C showed a higher degree of exhaustion and adsorption capacity when wool was pre-treated with n-pentanol compared to wool that was not pre-treated with n-pentanol. A constant increase in the degree of dye exhaustion on the pretreated wool fiber was observed during the increase in initial dye concentration. A longer dyeing time for pre-treated wool results in a higher degree of dye exhaustion. Models Weber-Morris and Elovich are applicable for describing the adsorption flow because there is very little scatter around the ideal curve, so functional straight lines cover most points very well.
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