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Title:Sinteza poroznih kopolimernih polielektrolitov na osnovi 2-akrilamido-2-metilpropansulfonske kisline
Authors:ID Marinček, Eva (Author)
ID Kovačič, Sebastijan (Mentor) More about this mentor... New window
Files:.pdf UN_Marincek_Eva_2018.pdf (2,26 MB)
MD5: 7A16FF19F410B3CBD296267C9939F476
PID: 20.500.12556/dkum/c6db57f5-12c9-4239-94d0-7a7f6818a866
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:PoliHIPE polimeri so visoko porozne polimerne pene, sintetizirane iz emulzij z visokim deležem notranje faze (HIPE, ang. High internal phase emulsions). To so emulzije, v katerih notranja faza predstavlja več kot 74% volumna celotne emulzije. V kolikor pri polimerizaciji HIPE uporabimo monomere s funkcionalnimi skupinami z nabojem, dobimo visoko porozne polielektrolite katerih stene por so ionsko nabite. Visoko porozni poliHIPE polielektroliti imajo zaradi porozne strukture in polielektrolitske narave polimera sposobnost visoke absorpcije vode, poleg tega pa so sposobni nase adsorbirati ionsko nasprotno nabite vodne polutante in jih v svoji strukturi tudi zadržati. Porozni polielektroliti tako predstavljajo velik potencial pri razvoju novih materialov, še posebej za čiščenje odpadnih voda. V diplomskem delu smo preko O/V HIP emulzij sintetizirali visoko porozne, zamrežene polielektrolite na osnovi 2-akrilamido-2-metilpropansulfonske kisline (AMPS) in (3-akrilamidopropil) trimetilamonijevega klorida (AMPTMA), pri čemer smo osnovnima monomeroma dodali akrilno kislino (AAc) oziroma akril amid (AAm). S polimerizacijo v raztopini smo sintetizirali neporozne polielektrolite z enakimi razmerji monomerov, njihove lastnosti pa smo kasneje primerjali s poroznimi. Po končani sintezi smo porozne polielektrolite okarakterizirali ter analizirali z infrardečo spektroskopijo (FTIR) in vrstično elektronsko mikroskopijo (SEM), s čimer smo potrdili kemijsko sestavo vzorcev in tipično morfologijo poliHIPE polimerov. Izvedli smo test absorpcije pri različnih pH vrednostih, kjer smo ugotovili, da poliHIPE polielektroliti absorbirajo večjo količino tekočine kot neporozni. Potrdili smo, da s spremembo pH vrednosti raztopine ter s kombinacijo različnih monomerov lahko vplivamo na absorpcijsko kapaciteto poliHIPE polielektrolita. Najvišje absorpcije smo dosegli v deionizirani vodi, kot najboljši absorbent pa se je izkazal poliHIPE polielektrolit na osnovi AMPS, ki je absorbiral več kot 40g/g vode glede na suho maso.
Keywords:polielektroliti, templatiranje iz emulzij z visokim deležem noranje faze, absorpcija, kopolimeri, hidrogeli
Place of publishing:Maribor
Publisher:[E. Marinček]
Year of publishing:2018
PID:20.500.12556/DKUM-71718 New window
UDC:544.6.018.47-036.5(043.2)
COBISS.SI-ID:21942550 New window
NUK URN:URN:SI:UM:DK:HU7U6NTU
Publication date in DKUM:06.09.2018
Views:1698
Downloads:136
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
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Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:28.08.2018

Secondary language

Language:English
Title:Synthesis of porous polyelectrolyte copolymers based on 2-acrylamido-2-methyl-1-propanesulfonic acid
Abstract:PolyHIPEs are highly porous emulsion-templated polymers synthesized within the high internal phase emulsions (HIPEs). HIPE is an emulsion in which the internal (droplet) phase constitute more than 74% of the emulsion volume and is dispersed within the continuous (minor) phase that contains monomers. If monomers with ionically charged functional groups are used, we can easily prepare highly porous polyelectrolytes the so-called polyelectrolyte polyHIPEs, in which the voids' walls become electrically charged. Due to highly porous morphology and polyelectrolyte nature of polymers constituting the voids' walls, polyelectrolytes polyHIPE exhibit high water absorption and water contaminat adsorption. Because of their properties, polyelectrolyte polyHIPE represent great research potential in the development of new materials for wastewater treatment. In the thesis, highly porous, cross-linked polyelectrolytes polyHIPEs based on 2-acrylamido-2-methylpropanesulfonic acid (AMPS) and (3-acrylamidopropyl) trimethylammonium chloride (AMPTMA) were synthesised through templating within the high internal phase emulsions, wherein acrylic acid (AAc) or acrylamide (AAm) were added in order to introduce the so-called zwitter-ionic character of the final material. Non-porous counterparts were synthesised via the solution polymerisation using the same ratio of monomers and their properties were compared with polyelectrolytes polyHIPEs. Characterization of as-obtained polyelectrolyte polyHIPEs cover infrared spectroscopy (FTIR) and scanning electrone microscopy (SEM) wherein the chemical composition and typical polyHIPE morphology were confirmed. The absorption test was perfromed at different pH values. Absorption studies confirmed higher uptakes for polyelectrolyte polyHIPEs versus nonporous ones. We further confirmed, that changing the pH of the solution in combination with different monomers affect absorption propereties of polyelectrolytes. The highest absorption was achieved in deionized water and polyelectrolyte polyHIPE based on AMPS proved to be the best absorbent with absorption capacity of more than 40g/g of its dry weigt.
Keywords:polyelectrolytes, high internal phase emulsion templating, absorption, copolymers, hydrogels


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