Polimerizacija zamreženega odzivnega polimera na osnovi akrilamida : diplomsko delo univerzitetnega študijskega programa I. stopnje

Kupec, Sara

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Title:	Polimerizacija zamreženega odzivnega polimera na osnovi akrilamida : diplomsko delo univerzitetnega študijskega programa I. stopnje
Authors:	ID Kupec, Sara (Author) ID Krajnc, Peter (Mentor) More about this mentor... ID Koler, Amadeja (Comentor)
Files:	UN_Kupec_Sara_2024.pdf (2,80 MB) MD5: 46532DC0633638442064B00D544533C8
Language:	Slovenian
Work type:	Bachelor thesis/paper
Typology:	2.11 - Undergraduate Thesis
Organization:	FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:	V okviru diplomskega dela smo pripravili visoko porozne poli(N-izopropilakrilamid-ko-N,N'-metilenbisakrilamidne) polimere z različnimi stopnjami zamreženja s polimerizacijo kontinuirne (monomerne) faze emulzije z visokim deležem notranje faze. Monomerna faza emulzije je bila sestavljena iz monomerov, topila, surfaktanta in fotoiniciatorja Irgacure-819. Kot monomere smo uporabili N-izopropilakrilamid (NIPAm) in N,N'-metilenbisakrilamid (MBAA) kot zamreževalo. Monomere smo raztopili v mešanici topila etanola in vode. Emulzije smo stabilizirali z mešanico surfaktantov Pluronic L-121 in Triton x-405. Kot notranjo fazo emulzije pa smo uporabili cikloheksan (80 vol.%). Uspešnost polimerizacije smo preverili z gravimetrijo in s FT-IR spektroskopijo, s katero smo potrdili prisotnost karakterističnih funkcionalnih skupin v polimeru. Za preučevanje poliHIPE morfologije smo uporabili vrstično elektronsko mikroskopijo, z absorpcijo/desorpcijo dušika po Brunauer-Emmett-Teller (BET) metodi pa smo določili BET specifično površino poroznih polimerov. Ugotovili smo, da pri višji stopnji zamreženja (30 mol.% MBAA) dobimo polimere s tipično porozno poliHIPE morfologijo, ki se po polimerizaciji minimalno skrčijo. Materiali z nižjim odstotkom zamreženosti pa so imeli zaradi skrčenja materiala po polimerizaciji slabšo oz. bolj porušeno poliHIPE strukturo por. Vsi poliHIPE materiali na osnovi akrilamidov so imeli relativno nizko BET specifično površino (do 30 m2/g) in visok izkoristek polimerizacije (višji od 90%). Nadaljnji razvoj takšnih materialov bi ogromno doprinesel na področju biomedicinskih aplikacij, kontroliranem sproščanju zdravil in filtracijskih sistemih.
Keywords:	fotopolimerizacija, HIPE, poliHIPE materiali, poliNIPAm, FT-IR, SEM
Place of publishing:	Maribor
Place of performance:	Maribor
Publisher:	[S. Kupec]
Year of publishing:	2024
Number of pages:	1 spletni vir (1 datoteka PDF (VIII, 33 f.))
PID:	20.500.12556/DKUM-87951
UDC:	661.717.53.095.26(043.2)
COBISS.SI-ID:	202939907
Publication date in DKUM:	26.04.2024
Views:	344
Downloads:	94
Metadata:
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:	02.04.2024

Secondary language

Language:	English
Title:	Polymerization of crosslinked responsive polymer based on acrylamide
Abstract:	This diploma thesis focuses on preparing highly porous poly(N-isopropylacrylamide-co-N,N’-methylenebisacrylamide) polymers with various degrees of crosslinking by polymerisation of the continuous (monomer) phase of a high internal phase emulsion. The monomer phase of the emulsion consisted of monomers, a solvent, a surfactant and a photoinitiator Irgacure-819. N-isopropylacrylamide (NIPAm) was applied as the monomers; N,N'-methylenebisacrylamide (MBAA) was used as a crosslinker. The monomers were dissolved in a mixture of ethanol and distilled water. The emulsions were stabilized with a mixture of surfactants Pluronic L-121 and Triton x-405. Cyclohexane (80 vol.%) was used as the internal phase of the emulsion. The success of polymerization was verified by gravimetry and FT-IR spectroscopy, which confirmed the presence of characteristic functional groups in the polymer. The scanning electron microscopy was used to study the morphology of polyHIPE; the nitrogen gas adsorption/desorption according to the Brunauer-Emmett-Teller (BET) theory was applied to determine the BET specific surface area of porous polymers. We found out that at a higher degree of crosslinking (30 mol.% MBAA) polymers with a typical porous polyHIPE morphology that minimally shrink upon polymerization were obtained. Materials with a lower percentage of crosslinking had a less promising or more disrupted polyHIPE pore structure due to the shrinkage of the material after polymerization. All acrylamide-based polyHIPE materials had a relatively low BET specific surface area (up to 30 m2/g) and high polymerization efficiency (higher than 90%). Further development of highly porous materials would make a huge contribution in the field of biomedical applications, controlled drug release and filtration systems.
Keywords:	photopolymerization, HIPE, polyHIPE materials, polyNIPAm, FT-IR, SEM

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