| | SLO | ENG | Cookies and privacy

Bigger font | Smaller font

Show document Help

Title:Sinteza in katalitske lastnosti poroznih TiO2/polimer kompozitov
Authors:ID Kunej, Jan (Author)
ID Koler, Amadeja (Mentor) More about this mentor... New window
ID Krajnc, Peter (Comentor)
Files:.pdf UN_Kunej_Jan_2024.pdf (3,88 MB)
MD5: E8089200E230792B09342ED8CFF019FE
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:V diplomski nalogi smo uspešno sintetizirali odprto celične visoko porozne kompozitne materiale, sestavljene iz sistema monomer/TiO2 delci. Kot monomer smo uporabili propoksiliran trimetitol propan triakrilat (Sartomer 492) ali trimetilpropan triakrilat (TMPTA). Kompozitne materiale smo pridobili s fotopolimerizacijo monomerne faze emulzije z visokim deležem notranje faze, pri čemer smo TiO2 delce vmešali v monomerno fazo. Pridobljen kompozitni material smo sintrali in morfologijo okarakterizirali z vrstično elektronsko mikroskopijo (SEM) in jim z adsopcijo/desorpcijo dušika določili specifično površino. Ugotovili smo, da je stabilizacija prekurzurske emulzije ključna za sintezo odprto celičnega poroznega kompozitnega materiala in da predvsem dodatek surfaktanta poli(etilen glikol)-blok-poli(propilen glikol)-blok-poli(etilen glikol) (PEL 121) v monomerno fazo emulzije ugodno vpliva na stabilnost le te in na povezovalno strukturo por. Obenem smo ugotovili, da je za nastanek odprto celične strukture por materialov pomembna disperznost delcev, ki je v zadostni meri ne dosežemo le z dodatkom disperzijskega sredstava (BYK 118), pač pa s predhodno sonifikacijo TiO2 delcev. Porozne kompozitne materiale smo sintrali pri temperaturi 1150 °C, s temperaturnim korakom 0,5 °C/min. Morfologija končnega keramičnega TiO2 monolita je bila zelo podobna predhodnemu polimernemu kompozitu, ki vsebuje tridimenzionalno odprto celično strukturo s primarnimi porami s povprečnim premerom okoli 3,5 μm in sekundarnimi porami velikosti 0,5 μm.
Keywords:poliHIPE, TiO2 delci, sintranje, kompozitni materiali, porozna keramika
Place of publishing:Maribor
Publisher:[J. Kunej]
Year of publishing:2024
PID:20.500.12556/DKUM-90378 New window
UDC:544.6.018.47-036.5(043.2)
COBISS.SI-ID:214497539 New window
Publication date in DKUM:10.09.2024
Views:189
Downloads:83
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
:
Copy citation
  
Average score:(0 votes)
Your score:Voting is allowed only for logged in users.
Share:Bookmark and Share



Hover the mouse pointer over a document title to show the abstract or click on the title to get all document metadata.

Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:02.09.2024

Secondary language

Language:English
Title:Synthesis and catalytic performance of porous TiO2/polymer composites
Abstract:In the thesis, open-cell, highly porous composite materials composed of a monomer/TiO2 particle system were successfully synthesized. Propoxylated trimethylolpropane triacrylate (Sartomer 492) or trimethylolpropane triacrylate (TMPTA) was used as the monomer. The composite materials were obtained by polymerizing the monomer phase of a high internal phase emulsion, with TiO₂ particles mixed into the monomer phase. The resulting composites material were then sintered, and their morphology were characterized using scanning electron microscopy (SEM) and their specific surface area was determined by nitrogen adsorption/desorption experiment. It was found that the stabilization of the precursor emulsion is crucial for the synthesis of open cellular porous composite material, and that the addition of the surfactant poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) (PEL 121) to the monomer phase of the emulsion positively affects its stability and the pore-connecting structure. Additionally, it was determined that the dispersion of particles is important for the formation of the open porous structure of the materials, which cannot be sufficiently achieved by the addition of a dispersing agent (BYK 118) alone, but requires the prior sonication of the TiO₂ particles. Finally, the porous composite materials were sintered at a temperature of 1150 °C with a heating rate of 0,5 °C per minute. The morphology of the final ceramic TiO2 monolith closely resembled that of the preceding polymer composite, which features a three-dimensionally interconnected cellular structure with primary pores averaging 3,5 μm in diameter and secondary pores measuring 0,5 μm.
Keywords:polyHIPE, TiO2 particles, composite materials, porous ceramics


Comments

Leave comment

You must log in to leave a comment.

Comments (0)
0 - 0 / 0
 
There are no comments!

Back
Logos of partners University of Maribor University of Ljubljana University of Primorska University of Nova Gorica