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doctoral thesis
Interakcije suprotno nabijenih polielektrolita u otopini i na površini
Zagreb: University of Zagreb, Faculty of Science, 2017. urn:nbn:hr:217:583215
Salopek, Jasmina
University of Zagreb
Faculty of Science
Department of Chemistry

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Salopek, J. (2017). Interakcije suprotno nabijenih polielektrolita u otopini i na površini (Doctoral thesis). Zagreb: University of Zagreb, Faculty of Science. Retrieved from https://urn.nsk.hr/urn:nbn:hr:217:583215

Salopek, Jasmina. "Interakcije suprotno nabijenih polielektrolita u otopini i na površini." Doctoral thesis, University of Zagreb, Faculty of Science, 2017. https://urn.nsk.hr/urn:nbn:hr:217:583215

Salopek, Jasmina. "Interakcije suprotno nabijenih polielektrolita u otopini i na površini." Doctoral thesis, University of Zagreb, Faculty of Science, 2017. https://urn.nsk.hr/urn:nbn:hr:217:583215

Salopek, J. (2017). 'Interakcije suprotno nabijenih polielektrolita u otopini i na površini', Doctoral thesis, University of Zagreb, Faculty of Science, accessed 19 April 2024, https://urn.nsk.hr/urn:nbn:hr:217:583215

Salopek J. Interakcije suprotno nabijenih polielektrolita u otopini i na površini [Doctoral thesis]. Zagreb: University of Zagreb, Faculty of Science; 2017 [cited 2024 April 19] Available at: https://urn.nsk.hr/urn:nbn:hr:217:583215

J. Salopek, "Interakcije suprotno nabijenih polielektrolita u otopini i na površini", Doctoral thesis, University of Zagreb, Faculty of Science, Zagreb, 2017. Available at: https://urn.nsk.hr/urn:nbn:hr:217:583215

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Metadata
TitleInterakcije suprotno nabijenih polielektrolita u otopini i na površini
Title (english)Interactions of oppositely charged polyelectrolytes in solution and on the surface
AuthorJasmina Salopek
MentorDavor Kovačević (mentor)
MentorJosip Požar (komentor)
Committee memberVesna Petrović-Peroković (predsjednik povjerenstva)
Committee memberDavor Kovačević (član povjerenstva)
Committee memberSuzana Šegota (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Science
(Department of Chemistry)
Zagreb
Defense date and country2017-12-19, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Universal decimal classification
(UDC)		54 - Chemistry. Crystallography. Mineralogy
Abstract
U svrhu istraživanja korelacije procesa nastanka polielektrolitnih kompleksa i višeslojeva ispitana je interpolielektrolitna neutralizacija triju parova sintetskih linearnih polimera visoke gustoće naboja u vodenim otopinama binarnih monovalentnih natrijevih soli (NaX; X = F, Cl, Br, I, NO3, ClO4). Pri nižim koncentracijama elektrolita, reakcije u otopini rezultirale su nastankom metastabilnih netopljivih kompleksa približno jednakih udjela suprotno nabijenih monomera. Porastom koncentracije elektrolita zbila se anion-specifična agregacija pozitivno nabijenih koloidnih kompleksa, a produkti reakcija dobiveni uz suvišak monomera pozitivnog naboja sadržavali su veći udio monomera polikationa s ekstrinzički kompenziranim nabojem. Analogna asimetrična interpolielektrolitna neutralizacija zamijećena je u slučaju odgovarajućih višeslojeva, priređenih pri jednakim ionskim uvjetima. Svi su polikationi pokazivali najveći afinitet prema perkloratnom ionu, vezanje je nitrata i jodida bilo podjednako, dok se afinitet prema ostalim halogenidima smanjivao u nizu Br– > Cl– > F–. Energetika kompleksiranja slabo je ovisila o vrsti i koncentraciji protuiona. Inverzija naboja primarnih kompleksa karakteristična za procese nastanka višeslojeva, prvi put je opažena kod polielektrolitnih parova istraženih tijekom izrade ovog doktorskog rada. Preraspodjela sparenih monomera u metastabilnim produktima reakcije zbivala se sporo i ovisila je o vrsti poliiona, te vrsti i koncentraciji prisutnog elektrolita. Provedena istraživanja ukazuju na potpunu korelaciju procesa interpolielektrolitne neutralizacije koji se zbivaju u otopinama i na električki nabijenim površinama.
Abstract (english)
The interpolyelectrolyte neutralization involving three pairs of linear high charge density polylelectrolytes was examined in aqueous solution of binary salts (NaX; X = F, Cl, Br, I, NO3, ClO4) with the aim of exploring the correlation between the processes of polyelectrolyte complex and multilayer formation. At lower electrolyte concentrations, metastable precipitates containing similar amounts of oppositely charged monomers were formed in solution. At higher salt content, and in the case when the polycation was present in excess, the obtained metastable products contained more positively charged monomers (asymmetric neutralization). The amount of extrinsically compensated positive charge was strongly anion dependant. The analogous behaviour was noticed in the case of the corresponding multilayers. The polycations exhibited the highest affinity towards perchlorates, the amount of bound nitrates and iodides was found to be similar, whereas the affinity for other halides decreased in the order Br– > Cl– > F–. The complexation energetics was weakly influenced by ionic conditions. The primary complex overcharging, characteristic for multilayer built-up, was observed in solution. The conversion of metastable to equilibrium products proceeded extremely slowly, exclusively at higher salt concentrations. The redestribution of monomers within precipitates was polylelectrolyte and counteranion specific. The performed investigations indicate that no fundamental differences related to outcome and the course of interpolylectrolyte neutralization in solutions and at electricaly charged surfaces exist.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:217:583215
Study programmeTitle: Doctoral study in chemistry
Study programme type: university
Study level: postgraduate
Academic / professional title: doktor/doktorica znanosti, područje prirodnih znanosti, polje kemija (doktor/doktorica znanosti, područje prirodnih znanosti, polje kemija)
Type of resourceText
Extent126 str. ; 30 cm
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
RepositoryRepository of the Faculty of Science
Created on2018-01-08 14:38:06

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