| | SLO | ENG | Cookies and privacy

Bigger font | Smaller font

Show document Help

Title:Mikroemulzijska polimerizacija za pripravo nanoporoznih materialov : diplomsko delo univerzitetnega študijskega programa I. stopnje
Authors:ID Polak, Jan (Author)
ID Krajnc, Peter (Mentor) More about this mentor... New window
ID Kristl, Matjaž (Comentor)
Files:.pdf UN_Polak_Jan_2019.pdf (4,84 MB)
MD5: 79582BFF3B4659C6118E616A21AC9807
PID: 20.500.12556/dkum/3b5118ab-ae26-4735-8fff-28d1322a22d6
 
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 z mikroemulzijsko polimerizacijo poskusili dobiti monolitni material s sferičnimi porami, ki bi bile manjše od 500 nm. V okviru tega smo najprej pripravili emulzijo z visokim deležem notranje faze, ki smo jo nato obdelali z ultrazvočno sondo in tako dobili mikroemulzijo, ki smo jo polimerizirali. Sintetizirali smo monolite na osnovi stirena in divinilbenzena ter glicidil metakrilata in etilen glikol dimetakrilata. Sinteza stirenskih monolitov, zamreženih z divinilbenzenom, je bila uspešna. Najprej smo optimirali pogoje za doseg stabilne emulzije. Ugotovili smo, da je za stirenski sistem najprimernejša amplituda ultrasonifikacije 21 % in čas sonificiranja 6 minut. Uspešno sintetizirane monolite smo nato ustrezno okarakterizirali. S FTIR spektroskopijo smo potrdili kemijsko sestavo monolitov, z vrstičnim elektronskim mikroskopom pa smo preverili njihovo morfologijo. Izmerili smo gostoto monolitov s helijevim piknometrom ter z geopycom. Z BET adsorpcijo ter desorpcijo dušika smo dobili specifično površino materiala. S pomočjo SEM posnetkov smo ugotovili, da smo uspeli sintetizirati materiale s povprečno velikostjo por 1,35 μm. Poskusili smo tudi z redoks iniciacijo, saj polimerizacija poteče pri nižji temperaturi in je hitrejša, a kljub temu pore niso bile manjše od 500 nm. V primeru glicidil metakrilatnih monolitov smo bili neuspešni, saj je uporaba ultrazvoka povzročila razpad emulzije.
Keywords:nanoporoznost, monolit, poliHIPE, mikroemulzija, ultrasonifikacija
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[J. Polak]
Year of publishing:2019
Number of pages:IX, 42 str.
PID:20.500.12556/DKUM-74505 New window
UDC:66.095.26:544.773.3(043.2)
COBISS.SI-ID:22676502 New window
NUK URN:URN:SI:UM:DK:IDY6VDK4
Publication date in DKUM:10.10.2019
Views:1217
Downloads:104
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-SA 4.0, Creative Commons Attribution-ShareAlike 4.0 International
Link:http://creativecommons.org/licenses/by-sa/4.0/
Description:This Creative Commons license is very similar to the regular Attribution license, but requires the release of all derivative works under this same license.
Licensing start date:29.08.2019

Secondary language

Language:English
Title:Microemulsion polymerization for nanoporous materials
Abstract:The goal of this diploma work was to use microemulsion polymerization to synthesise a monolith with spherical pores, smaller than 500 nm. We prepared stable polyHIPE emulsions. For mixing an ultrasonic probe was used to treat the HIP emulsions and make a stable microemulsion. We then polimerised such microemulsions. Our work focused on synthesising styrene-divinylbenzene and glycidyl methacrylate-ethylene glycol dimethacrylate copolymers. We succesfully synthesised STY-ko-DVB monoliths. The most optimal ultrasonification amplitude for producing small pores was 21 % with ultrasonification time of 6 minutes. Succesfuly synthesised monoliths were characterised with FTIR. BET adsorption and desorption was used to determine specfic surface area. For density mesurments we used Geopyc and Helium pycnometers, from which we could calculate the porosity. SEM was used to check the morphology of STI-co-DVB monoliths. We synthesised STY-co-DVB polimers with average primary pore size 1,35 μm. We also tryed redox initiaton, but the pores were not smaller than 500 nm. The smallest average pore size we obtained with redox initiation was 3,2 μm. We found that the use of ultrasound was not suitable for making GMA-ko-EGDMA monoliths, as none of the samples polymerised.
Keywords:nanoporosity, monolith, polyHIPE, microemulsion, ultrasonification


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