Vpliv čimžanja z jajčno lupino pri barvanju z ekstraktom lupine avokada

Isaković, Adilajda (avtor), Gorjanc, Marija (mentor)

Namen diplomskega dela je bil proučiti možnost uporabe dveh odpadkov prehrambne industrije za plemenitenje tekstilij, in sicer olupek avokada kot vir naravnega barvila in jajčno lupino kot vir čimže oziroma sredstva za predobdelavo bombažne tkanine za povečanje sorpcije naravnega barvila. Raziskava v sklopu diplomskega dela je zajemala čimžanje bombažne tkanine z mleto jajčno lupino in barvanje nečimžane in čimžane tkanine z barvilom, pridobljenim z vodno ekstrakcijo lupine avokada. Na refleksijskem spektrofotometru sta bili barvanim vzorcem izmerjeni barva (CIE L* a* b* ) in refleksija (R%), medtem ko sta med nečimžanim in čimžanim vzorcem bili določeni barvna razlika (?Eab*) in razlika v globini obarvanja (?K/S). S pomočjo UV/Vis-spektrofotomera je bil vzorcem določen ultravijolični (UV) zaščitni faktor (UZF). Barvalna kopel je bila pripravljena iz 100 g/l avokadove lupine, ekstrahirane v destilirani vodi. Z redčenjem osnovnega ekstrakta (100 g/l) smo pripravili barvalne kopeli različnih koncentracij, kot so: 20 g/l, 40 g/l in 80 g/l. Rezultati so pokazali, da so z višanjem koncentracije naravnega barvila lupine avokada vzorci postajali temnejši, tudi bolj rdeči in bolj rumeni. S čimžanjem so se povečale razlike v barvi, globini obarvanja in zaščiti pred UV sevanjem. Med vsemi vzorci je zadovoljivo UV-zaščito izkazoval čimžan vzorec in barvan v najvišji koncentraciji barvila (100 g/l). Iz rezultatov je razvidno, da lahko jajčno in avokadovo lupino uspešno uporabimo za okolju prijazno plemenitenje tekstilij.

• Jezik: Slovenski jezik
• Ključne besede: čimžanje, jajčna lupina, avokado, spektofotometrične meritve, barvanje z naravnimi barvili
• Vrsta gradiva: Diplomsko delo/naloga
• Organizacija: NTF - Naravoslovnotehniška fakulteta
• Leto izida: 2023
• PID: 20.500.12556/RUL-150470
• Datum objave v RUL: 18.09.2023

Sekundarni jezik

• Jezik: Angleški jezik
• Naslov: The influence of mordanting with eggshell for dyeing cotton with avocado peel extract

Izvleček

The purpose of the diploma thesis was to study the possibility of using two wastes from the food industry for textile finishing, namely avocado peel as a source of natural dye and eggshell as a source of mordant or agent for the pre-treatment of cotton fabric to increase the sorption of the natural dye. The research conducted as part of the diploma thesis covered the mordanting of the cotton fabric with ground eggshell and then the dyeing of non-mordanted and mordanted fabric with a dye obtained through the aqueous extraction of avocado peel. The colour (CIE L* a* b*) and reflectance (R) of samples was measured on a reflectance spectrophotometer, and the colour difference (ΔEab*) and dye uptake (ΔK/S) were determined between the mordant and non-mordant samples. UV-blocking properties were analysed with a UV-Vis spectrophotometer. We extracted 100 g/l of powdered avocado peel in distilled water and used it as a dyeing bath. By diluting the basic extract (100 g/l), we prepared dye baths of different concentrations, e.g., 20 g/l, 40 g/l and 80 g/l. The results showed that the samples dyed in a higher contraction of avocado peel extract became darker, redder and yellower. Mordanting increased the differences in colour, colour strength and UV protection factor (UPF). The highest UPF values were obtained on cotton fabrics dyed with the highest extract concentration (100 g/l), achieving satisfactory protective properties. The results show that eggshell and avocado peel can be successfully used for the environmentally friendly finishing of textiles.

• Ključne besede: mordant, eggshell, avocado, spectrometric measurements, dyeing with natural dyes