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Title:Vpliv iniciatorja in zamreženja na odzivnost hidrogel/stiren dvodomenskih poroznih polimerov
Authors:ID Slemenšek, Domen (Author)
ID Krajnc, Peter (Mentor) More about this mentor... New window
Files:.pdf MAG_Slemensek_Domen_2024.pdf (8,72 MB)
MD5: 4B9913E6648B03888183207AE3372191
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Magistrsko delo predstavlja rezultate sinteze in proučevanja vplivov iniciatorja, zamreženja in drugih dejavnikov na dvodomenski porozni polimer. Ena domena je hidrogel, ki vsebuje akrilno kislino zamreženo z N,N'-metilenbis(akrilamid)-om, medtem ko druga domena, v kateri se ta hidrogel nahaja, vsebuje stiren zamrežen z divinilbenzenom. Tako se hidrogelu omeji prostor za nabrekanje in s tem poveča uporabnost. Polimer smo sintetizirali z verižno radikalsko polimerizacijo emulzije z visokim deležem notranje faze. Pomembno je bilo zagotoviti stabilnost emulzije, da ni prišlo do ločevanja faz. Monoliti so bili bele barve, togi, krhki in porozni, s sposobnostjo absorbiranja velike količine vode, kar je glavna lastnost hidrogelov. Najpomembnejši dejavnik, ki vpliva na absorpcijo vode, je bil delež zamreženja z divinilbenzenom. Uspešnejša kot je bila polimerizacija, višja je bila absorpcija vode. Karakterizacijo smo izvedli z vrstičnim elektronskim mikroskopom, gravimetrijo in testiranjem absorpcije vode. Material lahko okarakteriziramo kot mikrogel v polimerni matriki, vendar bi to bilo potrebno potrditi s presevnim elektronskim mikroskopom zaradi omejitev vrstičnega elektronskega mikroskopa.
Keywords:poliHIPE, hidrogel, dvodomenski porozni polimer, stiren, divinil benzen, akrilna kislina, N, N′-metilenbis(akrilamid), verižna radikalska polimerizacija, absorpcija vode
Place of publishing:Maribor
Year of publishing:2024
PID:20.500.12556/DKUM-89836 New window
Publication date in DKUM:03.09.2024
Views:56
Downloads:11
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
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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:13.08.2024

Secondary language

Language:English
Title:Effect of initiator and crosslinking on the responsiveness of hydrogel/styrene bidomain porous polymers
Abstract:The master's thesis presents the results of the synthesis and study of the effects of the initiator, crosslinking, and other factors on a dual-domain porous polymer. One domain is a hydrogel containing acrylic acid crosslinked with N,N'-methylenebis(acrylamide), while the other domain, which encapsulates this hydrogel, contains styrene crosslinked with divinylbenzene. This restricts the swelling space of the hydrogel, thereby enhancing its applicability. The polymer was synthesized via high internal phase emulsion free-radical polymerization. It was crucial to ensure the stability of the emulsion to prevent phase separation. The resulting monoliths were white, rigid, brittle, and porous, with a high water absorption capacity, a key characteristic of hydrogels. The most significant factor affecting water absorption was the degree of crosslinking with divinylbenzene. The more successful the polymerization, the higher the water absorption. Characterization was carried out using scanning electron microscopy, gravimetry, and water absorption testing. The material can be characterized as a microgel within a polymer matrix, but this needs to be confirmed with transmission electron microscopy due to the limitations of scanning electron microscopy.
Keywords:polyHIPE, hydrogel, dual-domain porous polymer, styrene, divinylbenzene, acrylic acid, N, N'-methylenebis(acrylamide), free-radical polymerization, water absorption


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