20.500.12556/DKUM-80775 Kemijsko recikliranje tekstilnega kompozitnega materiala s prevladujočim deležem poliamida 6 magistrsko delo Chemical recycling of textile composite material with predominant polyamide 6 content Problema velike količine odpadnih polimernih materialov s katerim se srečuje današnja družba, se bo potrebno lotiti celostno in pri tem nekoliko pogledati izven okvirjev. To magistrsko delo smo zato namenili raziskovanju učinkovitosti metod kemijskega recikliranja tekstilnega kompozitnega materiala s prevladujočim deležem poliamida 6. Osredotočili smo se na alkalno in nevtralno hidrolizo ter metodo segrevanja v mravljični kislini, pri temperaturi vrelišča. Preučevali smo vpliv reakcijskih pogojev na produkt nevtralne hidrolize ter iskali učinkovite načine izolacije končnih produktov. Glede na lastnosti reakcijskih zmesi, smo se pri izolaciji produktov odločali med odparevanjem pod znižanim tlakom, raztapljanjem v destilirani vodi ter med kombinacijo raztapljanja v mravljični kislini in obarjanja. Kljub temu, da nismo dosegli popolne depolimerizacije, izolirani razgradni produkti vseeno obetajo. Alkalna hidroliza se je izkazala za najmanj primerno metodo. Boljše rezultate smo dobili z nevtralno hidrolizo. Pri slednji smo ugotovili, da s povišanjem masnega razmerja med reaktanti, iz 1:10 na 1:50, dosežemo višjo stopnjo depolimerizacije poliamida 6. Pomembna je tudi izbira ustreznega reakcijskega časa. Pri masnem razmerju 1:10 in temperaturi 250 °C, je to 30 oziroma 60 minut. Kot najučinkovitejša metoda depolimerizacije in izolacije produktov se je izkazalo segrevanje/raztapljanje v mravljični kislini. The problem of the large amount of polymer waste faced by today´s society needs to be addressed as a whole, and with some out-of-the-box thinking. Therefore, this master thesis aims to investigate the efficiency of chemical recycling of textile composite material with a predominant content of polyamide 6. We focused on alkaline and neutral hydrolysis and the method of dissolving polyamide 6 in formic acid at a boiling temperature. The influence of the reaction conditions on the neutral hydrolysis product was studied. In addition, an effective way to insulate end products was looked for. Depending on the reaction mixture properties, we used the following methods: rotary vacuum evaporation, dissolution in distilled water, or a combination of dissolution in formic acid and precipitation. Despite the fact, that we didn´t achieve complete depolymerization of polyamide 6, we still got very promising results in a form of our final products. Alkaline hydrolysis has proven to be the least suitable method. Better results were obtained with neutral hydrolysis. The results showed, that by increasing the mass ratio of reaction in neutral hydrolysis reaction, from 1:10 to 1:50, a higher degree of PA6 depolymerization can be achieved. At the same time, it is also important to choose the appropriate reaction time. In our case, with a mass ratio of 1:10 and the reaction temperature of 250°C, this turned out to be 30 or 60 minutes. However, dissolution in a formic acid has proven to be the most effective method of depolymerization, as well as the isolation method of end products. poliamid 6 kompozit kemijsko recikliranje nevtralna hidroliza alkalna hidroliza depolimerizacija v mravljični kislini polyamide 6 composite chemical recycling neutral hydrolysis alkaline hydrolysis depolymerization in formic acid true true false [P. Bizjak] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2021-10-11 18:00:04 2021-12-07 10:56:19 2022-08-09 23:55:57 0000-00-00 00:00:00 2021 0 Maribor 0 Maribor IX, 55 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 678.675.028.6(043.2) 105097987 MAG_Bizjak_Patricija_2021.pdf MAG_Bizjak_Patricija_2021.pdf 1 98BB94F9E6D212B82327737FA2725A8D 45d37457922e7ca3ca91c4c18ddf486d4a4f7dbf5ba44e2fb786d65e48a35400 fa2e685b-52df-11ec-909b-00155d000105 20.500.12556/dkum/aeb8b03d-efd3-4c36-ba3f-40b335572d37 https://dk.um.si/Dokument.php?lang=slv&id=155641 Fakulteta za strojništvo 0 0 0