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Nanoparticles based on complexes of hydrophilic block polyelectrolytes and new gemini ionic surfactants
Šomšáková, Katarína ; Uchman, Mariusz Marcin (advisor) ; Trhlíková, Olga (referee)
This bachelor thesis deals with preparation and study of the aqueous solutions of block polyelectrolyte poly(2-vinylpyridine)-b-poly(ethylen oxide), P2VP-PEO with gemini surfactants 6,6'-(ethan-1,2-diylbis(oxy)) bis(3-dodecylbenzenesulfonate acid), 6,6'- (buthan-1,4-diylbis(oxy)) bis(3- dodecylbenzenesulfonate acid) and 6,6'-(hexane-1,6- diylbis(oxy)) bis(3- dodecylbenzenesulfonate acid) complexes and with P2VP-PEO and sodium dodecylsulfate, SDS, complexes, and compares their physico-chemical properties. Formed particles were characterized by static and dynamic light scattering, zeta potential, isothermal titration calorimetry and transmission cryo-electron microscopy. Even small amount of surfactant leads to coassembly of P2VP-PEO with surfactants, formed by PEO shell and P2VP/surfactant core. The nanoparticles of block polyelectrolyte and gemini surfactants in 0.1M HCl are stable and their size depends on the spacer lenght and the surfactant/polymer ratio.
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Self-assembly of polymers with amphiphilic compounds (surfactants) in aqueous solutions
Delisavva, Foteini ; Procházka, Karel (advisor) ; Štěpánek, Petr (referee) ; Pánek, Jiří (referee)
Title: Self-assembly of polymers with amphiphilic compounds (surfactants) in aqueous solutions Abstract: This PhD Thesis is devoted to the co-assembly in systems containing electrically charged polymers (polyelectrolytes and block copolymers containing polyelectrolyte sequences). I studied the interactions between block copolymers and oppositely charged surfactants in aqueous solutions, and the structure and properties of co-assembled nanoparticles by a combination of several experimental methods. I found that the spontaneous formation, solubility and stability of complex nanoparticles depend not only on the electrostatic attractive forces but also on the hydrophobic effects. In a major part of my Thesis, I studied the interaction of polyelectrolytes with oppositely charged gemini surfactants (containing two charged head-groups interconnected by a short linker and two hydrophobic tails) which is a relatively new topic - much less studied than the co-assembly with conventional single tail surfactants. Better understanding of the formation and properties of complexes containing gemini surfactants and polymers provides knowledge that should lead to novel tailor-made nanoparticles with desired properties for applications in medicine and new technologies (including nano-technologies). We have shown that the...
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Nanoparticles based on complexes of hydrophilic block polyelectrolytes and new gemini ionic surfactants
Šomšáková, Katarína ; Uchman, Mariusz Marcin (advisor) ; Trhlíková, Olga (referee)
This bachelor thesis deals with preparation and study of the aqueous solutions of block polyelectrolyte poly(2-vinylpyridine)-b-poly(ethylen oxide), P2VP-PEO with gemini surfactants 6,6'-(ethan-1,2-diylbis(oxy)) bis(3-dodecylbenzenesulfonate acid), 6,6'- (buthan-1,4-diylbis(oxy)) bis(3- dodecylbenzenesulfonate acid) and 6,6'-(hexane-1,6- diylbis(oxy)) bis(3- dodecylbenzenesulfonate acid) complexes and with P2VP-PEO and sodium dodecylsulfate, SDS, complexes, and compares their physico-chemical properties. Formed particles were characterized by static and dynamic light scattering, zeta potential, isothermal titration calorimetry and transmission cryo-electron microscopy. Even small amount of surfactant leads to coassembly of P2VP-PEO with surfactants, formed by PEO shell and P2VP/surfactant core. The nanoparticles of block polyelectrolyte and gemini surfactants in 0.1M HCl are stable and their size depends on the spacer lenght and the surfactant/polymer ratio.
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