Pretvorba polietilen tereftalata v turbostratični grafen z bliskovitim Joulovim segrevanjem

diplomsko delo

Oskar Baumgartner (Author), Boštjan Genorio (Mentor)

Abstract

V diplomskem delu obravnavam pretvorbo polietilen tereftalata (PET) v turbostratični grafen z uporabo metode bliskovitega Joulovega segrevanja. Pripravil sem mešanico piroliziranega polietilen tereftalata in saj, jo vstavil v kvarčne cevke med elektrode, najprej obdelal s kratkimi električnimi pulzi ter nato bliskovito segrel pri različnih napetostih. Tako pridobljene vzorce sem nato karakteriziral z vrstično elektronsko mikroskopijo (SEM), rentgensko fotoelektronsko spektroskopijo (XPS) in Ramansko spektroskopijo. Pri napetostih 100-120 V je nastal predvsem porozen amorfni ogljik, medtem ko so se pri 150-200 V začele oblikovati plastovite strukture. Ramanski spektri za 150 V in 200 V kažejo izrazit (simetričen) 2D-pas, kar potrjuje prisotnost turbostratičnega grafena. XPS analiza je potrdila zmanjšanje vsebnosti kisika in kisikovih funkcionalnih skupin glede na izhodiščni pirolizirani PET. Tudi posnetki z vrstičnim elektronskim mikroskopom razkrivajo nastanek plastovitih struktur.

Keywords

grafen;turbostratični;bliskovito Julovo segrevanje;termični razpad;diplomska dela;

Data

Language:	Slovenian
Year of publishing:	2025
Typology:	2.11 - Undergraduate Thesis
Organization:	UL FKKT - Faculty of Chemistry and Chemical Technology
Publisher:	[O. Baumgartner]
UDC:	620.3(043.2)
COBISS:	255165955
Views:	106
Downloads:	19
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Conversion of polyethylene terephthalate to turbo stratified graphene by flash Joule heating
Secondary abstract:	In this thesis, I investigate the conversion of polyethylene terephthalate (PET) into turbostratic graphene using the Flash Joule Heating (FJH) method. A mixture of pyrolyzed PET and carbon black was prepared, loaded into quartz tubes between electrodes, first treated with short electrical pulses, and then flash-heated at different voltages. The resulting samples were characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. At voltages of 100–120 V, the product was predominantly porous amorphous carbon, whereas at 150–200 V layered structures began to emerge. Raman spectra at 150 V and 200 V revealed a pronounced 2D band, confirming the presence of turbostratic graphene. XPS analysis further confirmed a reduction in oxygen content and oxygen-containing functional groups compared to the starting pyrolyzed PET. SEM images additionally revealed the formation of layered structures.
Secondary keywords:	graphene;flash Joul heating;turbostratic;Polietilentereftalat;Materiali;Ogljik;Univerzitetna in visokošolska dela;
Type (COBISS):	Bachelor thesis/paper
Study programme:	1000372
Embargo end date (OpenAIRE):	1970-01-01
Thesis comment:	Univ. v Ljubljani, Fak. za kemijo in kemijsko tehnologijo, UNI Kemijsko inženirstvo
Pages:	1 spletni vir (1 datoteka PDF (39 str.))
ID:	27266693