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Ion-Specific and Solvent Effects on PDADMA–PSS Complexation and Multilayer Formation

Jukić, Jasmina; Korade, Karla; Milisav, Ana-Marija; Delač Marion, Ida; Kovačević, Davor (2021) Ion-Specific and Solvent Effects on PDADMA–PSS Complexation and Multilayer Formation. Colloids and Interface, 5 (3). ISSN 2504-5377

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Among various parameters that influence the formation of polyelectrolyte complexes and multilayers, special emphasis should be placed on ion-specific and solvent effects. In our study, we systematically examined the above-mentioned effects on poly(diallyldimethylammonium chloride) (PDADMACl)-sodium poly(4-styrenesulfonate) (NaPSS) complexation in solution and at the surface by means of dynamic light scattering, ellipsometry and atomic force microscopy measurements. As solvents, we used water and water/ethanol mixture. The obtained results confirm the importance of ion-specific and solvent effects on complexes prepared in solution, as well as on multilayers built up on a silica surface. The experiments in mixed solvent solution showed that at a higher ethanol mole fraction, the decrease in monomer titrant to titrand ratio, at which the increase in the size of complexes is observed, takes place. The difference between chloride and bromide ions was more pronounced at a higher mole fraction of ethanol and in the case of positive complex formation, suggesting that the larger amount of bromide ions could be condensed to the polycation chain. These findings are in accordance with the results we obtained for polyelectrolyte multilayers and could be helpful for designing polyelectrolyte multilayers with tuned properties needed for various applications, primarily in the field of biomedicine.

Item Type: Article
Uncontrolled Keywords: polyelectrolytes ; polyelectrolyte complexes ; polyelectrolyte multilayers ; ion-specific effects ; solvent effects
Subjects: NATURAL SCIENCES > Chemistry
Divisions: Division of Physical Chemistry
Project titleProject leaderProject codeProject type
Modulacija polifenolnog profila voća uslijed fizikalnih tretmana nakon branjaKovačević, DavorIPS-2020-01-6126HRZZ
Depositing User: Sofija Konjević
Date Deposited: 06 Aug 2021 10:11
DOI: 10.3390/colloids5030038

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