Naslov
Međudjelovanja u smjesama alkilamonijevog klorida i natrijevog kolata
(Interactions in Mixtures of Alkylammonium chlorides and sodium cholate)

Autori
Jurašin, Darija ; Vinceković, Marko ; Tomašić, Vlasta ; Filipović-Vinceković, Nada

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Knjiga sažetaka: XIX. Hrvatski skup kemičara i kemijskih inženjera / Rapić, Vladimir ; Rogošić, Marko - Zagreb : Sveučilišna tiskara, 2005, 186-186

Skup
XIX. Hrvatski skup kemičara i kemijskih inženjera

Mjesto i datum
Opatija, Hrvatska, 24.04.2005. - 27.04.2005

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
alkylammonium chloride; sodium cholate; catanionic mixtures

Sažetak
Interactions in aqueous mixtures of the cationic surfactant (n-alkylammonium chlorides) and anionic surfactant (sodium cholate) have been investigated by surface tension, conductivity, microelectrophoretic and light scattering measurements as well as by optical microscopy. Investigated mixtures display interesting interfacial and phase behavior properties ; i.e. strong synergistic effects were observed for both their interfacial and bulk properties. Competition between various molecular interactions (hydrophobic, electrostatic, van der Waals, hydration forces, etc.) may result in mixed monolayer at the air/solution interface and variety of microstructures, catanionic surfactant salts, catanionic mixed micelles, catanionic vesicles, etc. in bulk phase. Adsorption at the air/solution interface and phase behavior strongly depend on the surfactant mixing molar ratio, the total concentration and molecular structure. The formation and stability of different phases are discussed in terms of surfactant molecular packing constraints and electrostatic interactions. Oppositely charged surfactants mixed non-ideally in both mixed monolayer and in the mixed micelles. The regular solution theory was used for evaluating the non-ideal interactions between surfactant molecules in adsorbed and micellar state.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Prehrambena tehnologija

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