pH odzivnost tekstilij, barvanih z barvilom metiloranž

Savnik, Nika (avtor), Kert, Mateja (mentor)

V diplomskem delu je preučevana pH odzivnost bombažne (CO) in poliamidne 6 tkanine (PA 6), obarvane z indikatorskim barvilom metiloranž (MO). Barvna odzivnost pobarvanih tkanin na spremembo vrednosti pH je določena spektrofotometrično s potopitvijo preizkušancev v pufrske raztopine različnih vrednosti pH. Stopnja izčrpanja barvila, globina obarvanja in enakomernost obarvanja so prav tako določene spektrofotometrično. Barvne obstojnosti pobarvanih tkanin pri suhem in mokrem drgnjenju, vročem likanju, gospodinjskem in poklicnem pranju ter na umetni svetlobi so testirane v skladu s standardi SIST EN ISO. Indikatorsko barvilo MO je bilo uspešno naneseno na kationizirano bombažno tkanino in tkanino PA 6 po izčrpalnem postopku barvanja. Oblikovani sta bili pH odzivni tkanini. Kationizacija bombažne tkanine pred barvanjem je povečala adsorpcijo barvila MO na tkanino. Pobarvana tkanina PA 6 je zelo dobro barvno obstojna pri pranju, suhem in mokrem drgnjenju, vročem likanju in na umetni svetlobi v primerjavi z bombažno tkanino. Barvna odzivnost barvila MO na spremembo vrednosti pH, vezanega na kationizirano bombažno tkanino, je boljša od barvne odzivnosti barvila MO, vezanega na tkanino PA 6. Rezultati raziskave so pokazali, da je protonacija in deprotonacija barvila, vezanega na vlakna, in s tem povezana barvna odzivnost tkanin na spremembo vrednosti pH pogojena z jakostjo interakcij barvilo – vlakno in sposobnostjo omakanja pobarvane tekstilije s pufrsko raztopino.

• Jezik: Slovenski jezik
• Ključne besede: kationska predobdelava, izčrpalno barvanje, metiloranž, pH odzivnost, bombaž, poliamid 6
• Vrsta gradiva: Diplomsko delo/naloga
• Organizacija: NTF - Naravoslovnotehniška fakulteta
• Leto izida: 2022
• PID: 20.500.12556/RUL-136801
• Datum objave v RUL: 21.05.2022

Sekundarni jezik

• Jezik: Angleški jezik
• Naslov: pH responsiveness of textiles, dyed with methyl orange dye

Izvleček

In the diploma thesis, the pH responsiveness of cotton and polyamide 6 fabrics dyed with the indicator dye methyl orange (MO) was investigated. The colour response of the dyed fabrics to the change in pH was determined spectrophotometrically by immersing the dyed samples in buffer solutions with different pH values. The exhaustion of the dye, the colour depth and the dyeing levelness were also determined spectrophotometrically. The colour fastness of the dyed fabrics to dry and wet rubbing, hot pressing, domestic and commercial laundering, and artificial light was tested according to the SIST EN ISO standards. The indicator dye MO was successfully applied to the cationised cotton fabric and the polyamide 6 fabric using the exhaust dyeing process. pH responsive fabrics were developed. Cationisation of the cotton fabric before dyeing increased the adsorption of the dye MO on the fabric. Compared to the dyed cotton fabric, the dyed polyamide 6 fabric exhibits very good colour fastness to dry and wet rubbing, hot pressing, domestic and commercial laundering and artificial light. The colour response of the dye MO bound on the cationised cotton fabric to the change in pH is better than the colour response of the dye MO bound on the polyamide 6 fabric. The results of the study show that the protonation and deprotonation of the dye bound to the fibres and the associated colour response of the investigated fabrics to changes in pH depend on the strength of the dye-fibre interactions and the wettability of the dyed fabric with the buffer solution.

• Ključne besede: cationic pretreatment, exhaust dyeing, methyl orange, pH responsiveness, cotton, polyamide 6