Pregled bibliografske jedinice broj: 299673
Characterization of micellar systems by the conductivity method; Sodium salt of perfluoropolyether carboxylic acid
Characterization of micellar systems by the conductivity method; Sodium salt of perfluoropolyether carboxylic acid // Colloid and polymer science, 272 (1994), 12; 1576-1581 doi:10.1007/BF00664725 (međunarodna recenzija, članak, znanstveni)
CROSBI ID: 299673 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Characterization of micellar systems by the conductivity method; Sodium salt of perfluoropolyether carboxylic acid
Autori
Kallay, Nikola ; Tomašić, Vlasta ; Žalac, Suzana ; Chittofrati, Alba
Izvornik
Colloid and polymer science (0303-402X) 272
(1994), 12;
1576-1581
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
conductivity ; micelles ; counterion binding ; perfluorinated surfactants
Sažetak
A new method for the interpretation of the conductivity of ionic surfactants is proposed. The model considers the contribution of ions and of charged micelles, and is based on the approximation of constant concentration of surfactant chains above the critical micellization concentration (CMC), and on the equilibrium constant of counterion binding to the micelles (K). These two parameters evaluated for aqueous solutions of sodium salt of perfluoropolyether carboxylic aqcid are as follows: K = 35 800 dm^3mol^-1 ; CMC = 1.19 x 10^-3 mol dm^-3. The third quantity obtained by this procedure is rthe product of the aggregation number (N) and the size parameter (f = e2 L/ 6π η r): Nf = 76.5 cm^2 mol^-1.
Izvorni jezik
Engleski
Znanstvena područja
Kemija
POVEZANOST RADA
Ustanove:
Institut "Ruđer Bošković", Zagreb,
Prirodoslovno-matematički fakultet, Zagreb
Citiraj ovu publikaciju:
Časopis indeksira:
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
