Učinkovitost lovilca barvil za večkratno uporabo pri gospodinjskem pranju perila

Poženel, Nika (author), Tomšič, Brigita (mentor)

V diplomskem delu je bila proučevana učinkovitost lovilca barvil za večkratno uporabo pri zaporednih gospodinjskih pranjih pri nizki temperaturi pranja T = 40 °C ob uporabi pralnega sredstva za pranje barvnega perila in primerjana z lovilcem barvil v obliki lističa za enkratno uporabo. Učinkovitost adsorpcije lovilca barvil za večkratno in enkratno uporabo je bila določena za modelno reaktivno rdeče barvilo Avitera red SE. Zaporedna pranja so bila izvedena v gospodinjskem pralnem stroju, ob prisotnosti raztopine modelnega barvila v predhodno določenih koncentracijah izluženega barvila na podlagi simulacije 100-, 25- in 10-% polnjenju bobna z novo pobarvano bombažno tkanino s 3-% koncentracijo modelnega barvila. Z vrstično elektronsko mikroskopijo (SEM) in infrardečo spektroskopijo s Fourierjevo transformacijo (FT-IR) so bile določene morfološke in kemijske lastnosti lovilca barvil za večkratno uporabo. Posedanje barvila in s tem učinkovitost lovilca barvil je bila določena na beli 100-odstotni bombažni (CO) in poliestrski (PES) tkanini ter pletivu mešanice poliamida in elastana (PA+El) s spektrofotometričnim merjenjem CIE L*a*b* koordinat, na podlagi katerih je bila določena barvna razlika ??E?_ab^*, in primerjana z vzorci pranimi brez lovilca barvil in vzorci pranimi z lovilcem barvil za enkratno uporabo. Rezultati morfoloških in kemijskih lastnosti krpice lovilca barvil so potrdile surovinsko sestavo krpice lovilca barvil, ki je skladno z deklaracijo proizvajalca 100 % bombaž, najverjetneje oplemeniten s sredstvi za povečanje adsorpcije barvil na podlagi kationskih polimerov. Učinkovitost lovilca barvil za večkratno uporabo je naraščala z nižanjem koncentracije izluženega barvila v pralni kopeli. Najbolje je preprečila obarvanje CO vzorca, najmanj pa PA+EL vzorca, kar je posledica ohlapnejše konstrukcije pletiva. Na vzorec PES krpica ni imela bistvenega vpliva. Ugotovljeno je bilo tudi, da učinkovitost lovilca barvil za večkratno uporabo s številom ponovne uporabe pada, a je njegova učinkovitost kljub temu boljša od lovilca barvil kot listič za enkratno uporabo.

• Language: Slovenian
• Keywords: tekstil, gospodinjsko pranje, lovilec barvil, izluženje barvila, barvna sprememba
• Work type: Bachelor thesis/paper
• Organization: NTF - Faculty of Natural Sciences and Engineering
• Year: 2024
• PID: 20.500.12556/RUL-161347
• Publication date in RUL: 10.09.2024

Secondary language

• Language: English
• Title: Efficiency of reusable dye catcher for household laundry

Abstract

In the diploma thesis, the effectiveness of a reusable dye catcher was determined in successive household washes at a low washing temperature of T = 40°C using detergent for coloured laundry and compared with a disposable dye catcher sheet. The adsorption efficiency of the reusable and disposable dye catchers was determined using the model reactive dye Avitera Red SE. Successive washes were carried out in a domestic washing machine with a solution of the model dye at predetermined concentrations, based on simulations of 100 %, 25 % and 10 % drum loads with a dyed cotton fabric at 3 % dye concentration. Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT-IR) were used to determine the morphological and chemical properties of the reusable dye catcher. The dye deposition and the corresponding efficiency of the dye catcher were measured on white fabrics samples made of 100 % cotton (CO), polyester (PES) and a polyamide-elastane (PA+El) knit blend by spectrophotometric measurement of CIE L*a*b* coordinates, from which the colour difference, 〖⠆E〗_ab^* , was determined, and compared to samples washed without a dye catcher and samples washed with a single-use dye catcher. The results of the morphological and chemical analysis of the reusable dye catcher confirmed the 100 % cotton raw material composition stated by the manufacturer, which was probably modified with agents that increase dye adsorption based on cationic polymers. The effectiveness of the reusable dye catcher increased as the concentration of leached dye in the wash bath decreased. It was most effective on the CO sample and least effective on the PA+EL sample, probably due to the looser knit structure. The dye catcher had no significant effect on the PES sample. It was also found that the effectiveness of the reusable dye catcher decreased with repeated use, but was still better than the disposable dye catcher sheet.

• Keywords: textile, household washing, dye catcher, dye leaching, colour change