diplomsko delo
Matija Marinič (Author), Aleš Ručigaj (Mentor)

Abstract

Hidrogeli so tridimenzionalna polimerna omrežja, ki lahko absorbirajo in zadržijo velike količine vode. So funkcionalni materiali, primerni za uporabo na številnih področjih zaradi svojih dobrih lastnosti in biokompatibilnosti, zlasti za biomedicinske namene. Pri diplomskem delu sem se ukvarjal s pripravo in karakterizacijo hidrogelov pripravljenih iz TEMPO oksidirane nanoceluloze. V okviru eksperimentalnega dela so bile pripravljene različne mešanice hidrogelov iz nanoceluloznih vlaken in skleroglukana. Na podlagi meritev smo hidrogelom določili viskoelastične lastnosti ter spremljali spremembe v strukturi soniciranih in nesoniciranih enokomponentnih raztopin hidrogelov ter mešanic. Sonicirani vzorci tako TEMPO nanoceluze kot vzorci mešanic so se izkazali kot bolj zamreženi z višjimi vrednostmi viskoelastičnih modulov. Sonicirani vzorci so se izkazali za bolj toge v primerjavi z nesonicirani vzorci.

Keywords

hidrogeli;TEMPO nanoceluloza;zamreževanje;sonokemija;ultrazvok;reologija;diplomska dela;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL FKKT - Faculty of Chemistry and Chemical Technology
Publisher: [M. Marinič]
UDC: 678(043.2)
COBISS: 149156867 Link will open in a new window
Views: 34
Downloads: 5
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Other data

Secondary language: English
Secondary title: Effect of ultrasonic sonication on the crosslinking of TEMPO modified nanocellulose and its blends
Secondary abstract: Hydrogels are three-dimensional polymer networks that can absorb and retain large amounts of water. They are functional materials suitable for use in several fields due to their good properties and biocompatibility, especially in the biomedical field. In my thesis, I was involved in the preparation and characterization of hydrogels prepared from TEMPO oxidized nanocellulose. As part of the experimental work, various mixtures of hydrogels were prepared from TEMPO nanocellulose fibers and scleroglucan. Based on the measurements, we determined the viscoelastic properties of hydrogels and monitored changes in the structure of sonicated and non-sonicated one-component solutions of hydrogels and their mixtures. Sonicated samples of both TEMPO nanocellulose and mixtures were found to be better cross-linked with higher viscoelastic moduli values. Sonicated samples have proven to be more rigid than non-sonicated samples.
Secondary keywords: TEMPO nanocellulose;crosslinking;hydrogel;rheology;ultrasound;Polimeri;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: 40 str.
ID: 18572671