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Title:Izboljšanje lastnosti škrobnih aerogelov z dodatkom hitozana : diplomsko delo visokošolskega strokovnega študijskega programa I. stopnje
Authors:ID Petrovič, Rok (Author)
ID Novak, Zoran (Mentor) More about this mentor... New window
ID Pantić, Milica (Comentor)
Files:.pdf VS_Petrovic_Rok_2024.pdf (5,38 MB)
MD5: 1C746B83BD3769534F4BDB709A9E859F
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Namen diplomskega dela je bil sintetizirati polisaharidne aerogele na osnovi škroba z dodatkom hitozana ter preučiti vpliv dodatka hitozana na njihove termične in strukturne lastnosti. Polisaharidni aerogeli so izjemno lahki in porozni materiali, ki so se zaradi svoje biokompatibilnosti in biorazgradljivosti v zadnjem desetletju izkazali kot obetavni kandidati za razvoj novih metod v biomedicinskih aplikacijah. V eksperimentalnem delu smo s sol-gel sintezo pripravili škrobno-hitozanske aerogele pri različnih koncentracijah obeh polimerov, ki smo jih nato posušili s superkritičnim ogljikovim dioksidom. Sušenje smo izvedli pri 40 °C in 120 bar na polindustrijski napravi za superkritično sušenje UHDE. Lastnosti škrobno-hitozanskih aerogelov smo karakterizirali z metodami plinske adsorpcije, vrstične elektronske mikroskopije (SEM), Fourierjeve transformacijske infrardeče spektroskopije (FTIR), termogravimetrične analize (TGA) in diferencialne vrstične kalorimetrije (DSC). Nazadnje smo z izvedbo testov nabrekanja in stabilnosti preučili njihovo obnašanje v vodnem mediju. Rezultati so pokazali, da se je hitozan uspešno vgradil v strukturo škrobnih aerogelov ter izboljšal njihove strukturne in termične lastnosti.
Keywords:Aerogeli, polisaharidi, škrob, hitozan, superkritični fluidi, sol-gel sinteza
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[R. Petrovič]
Year of publishing:2024
Number of pages:1 spletni vir (1 datoteka PDF (VIII, 31 f.))
PID:20.500.12556/DKUM-90078 New window
UDC:66.091.3:544.774.2(043.2)
COBISS.SI-ID:221572611 New window
Publication date in DKUM:24.09.2024
Views:0
Downloads:25
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
:
PETROVIČ, Rok, 2024, Izboljšanje lastnosti škrobnih aerogelov z dodatkom hitozana : diplomsko delo visokošolskega strokovnega študijskega programa I. stopnje [online]. Bachelor’s thesis. Maribor : R. Petrovič. [Accessed 13 April 2025]. Retrieved from: https://dk.um.si/IzpisGradiva.php?lang=eng&id=90078
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Licences

License:CC BY-NC 4.0, Creative Commons Attribution-NonCommercial 4.0 International
Link:http://creativecommons.org/licenses/by-nc/4.0/
Description:A creative commons license that bans commercial use, but the users don’t have to license their derivative works on the same terms.
Licensing start date:22.08.2024

Secondary language

Language:English
Title:Enhancing starch aerogels through chitosan modification
Abstract:The aim of the thesis was to synthesize polysaccharide-based starch-chitosan aerogels and investigate the effects of chitosan addition on their thermal and structural properties. Polysaccharide aerogels are highly lightweight and porous materials, which, due to their biocompatible and biodegradable nature, have emerged as promising candidates for novel biomedical applications over the past decade. In the experimental section, starch-chitosan aerogels with varying concentrations of both polymers using sol-gel synthesis were prepared. The supercritical carbon dioxide drying followed. The drying process was conducted at 40 °C and 120 bar using a pilot-scale supercritical drying apparatus, UHDE. The structural and thermal properties of the starch-chitosan aerogels were characterized through gas adsorption, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). Additionally, their behavior in aqueous media was assessed through swelling and stability tests. The results demonstrated that chitosan was successfully incorporated into the starch aerogel matrix, leading to enhanced structural and thermal properties.
Keywords:Aerogels, polysaccharides, starch, chitosan, supercritical fluids, sol-gel synthesis


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