magistrsko delo
Dea Marko (Author), Julija Volmajer Valh (Mentor), Bojana Vončina (Co-mentor)

Abstract

V zadnjih letih je zaradi vse višjega življenjskega standarda ter rasti prebivalstva, močno narasla količina proizvedenih in uporabljenih tekstilnih materialov. Povečala se je tudi količina odpadnega tekstila, lahko pa sklepamo, da se bo ta v prihodnje še povečala. Polietilen tereftalat je danes tretji najbolj razširjen polimer, za polietilenom in polipropilenom. V tekstilni industriji je najbolj uporabljen sintetični material za izdelavo vlaken. V raziskavi smo se ukvarjali s problematiko recikliranja PET vlaken. Predpostavljali smo, da bomo kot glavni produkt izolirali monomer tereftalne kisline. Metoda, ki smo jo uporabili je nevtralna hidroliza PET vlaken v visokotlačnem reaktorju, ki nam omogoča višjo čistost izhodnih snovi – tereftalne kisline in etilen glikola. Izvedli smo izolacijo in čiščenje nastalih produktov s pomočjo kislinsko bazne ekstrakcije in destilacije. Nastale produkte smo analizirali z infrardečo spektroskopijo. Cilj magistrskega dela je bil raziskati razgradne produkte po kemijskem recikliranju PET vlaken v visokotlačnem reaktorju pod različnimi pogoji. Spreminjali smo temperaturo, čas in razmerje med uporabljenim tekstilnim materialom in topilom in nato analizirali nastale razgradne produkte. Ugotovili smo, da so pride do popolne depolimerizacije PET vlaken do tereftalne kisline pri naslednjih pogojih: T = 250 °C in t = 10 min (vzorec D2).

Keywords

kemijsko recikliranje;razgradnja PET;tereftalna kislina;IR spektorskopija;magistrska dela;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UM FS - Faculty of Mechanical Engineering
Publisher: [D. Marko]
UDC: 678.028.6:678.742.2(043.2)
COBISS: 21241622 Link will open in a new window
Views: 1888
Downloads: 278
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Other data

Secondary language: English
Secondary title: Chemical recycling of polyethylene terephthalate and characterization of degradation products
Secondary abstract: Increasing standard of living and population growth in recent years are the reason the volume of manufactured and used textile materials has increased considerably. The amount of waste textile has increased and we can conclude it will also increase in the future. Polyethylene terephthalate is the third most common polymer, after polyethylene and polypropylene. It is the most used synthetic fiber in the textile industry. In the research we dealt with the problem of recycling PET fibers. We assumed that as the main product we would isolate the monomer of terephthalic acid. The methods we used are the neutral hydrolysis of PET fibers in the high-pressure reactor, which enables us to achieve higher purity of the starting materials – terephtalic acid and ethylene glycol. We isolated and purified the resulting products by acid base extraction and distillation. The resulting products were analyzed by infrared spectroscopy. The aim of this master's thesis was to investigate the degradation of the products after chemical recycling of PET fibers in a high-pressure reactor under different conditions. We changed the temperature, time and ratio between the used textile material and the solvent, and then we analyzed the resulting products. We found out that complete depolymerisation was achieved at following conditions: T = 250 ° C and t = 10 min (sample D2).
Secondary keywords: chemical recycling;PET degradation;terephthalic acid;IR spectroscopy;
URN: URN:SI:UM:
Type (COBISS): Master's thesis/paper
Thesis comment: Univ. v Mariboru, Fak. za strojništvo, Tehniško varstvo okolja
Pages: X, 59 f.
ID: 10862391