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Micellization versus Cyclodextrin–Surfactant Complexation by Ana B. Dorrego; Luis García-Río; Pablo Hervés; José R. Leis; Juan C. Mejuto; Jorge Pérez-Juste is a Chemistry article available to read on EtoBox.

What is Micellization versus Cyclodextrin–Surfactant Complexation about?

Upon addition of cyclodextrin (CD) to a surfactant solution, a considerable change in the physicochemical properties can be observed, that is, the surface tension of the surfactant solution usually increases. When a concentration of cyclodextrin well in excess of the surfactant concentration is reached, the surface tension approaches that of pure water, indicating that neither surfactant ± cyclodextrin complexes nor cyclodextrins themselves are surface active. Other properties such as cloud point, molar conductance, sodium ion activity, ultrasonic properties, spectral behavior, and hydrophobicity are modified by the addition of CDs. It has traditionally been assumed that the cyclodextrin molecules complex the monomers of the surfactant in such a way that the process of micellization will only begin once the surfactant monomers have saturated the cyclodextrin capacity for complexation. The strength of CD ± hydrocarbon chain interactions increases for the common water-soluble ionic surfactants as the length of the alkyl chains increases. The large diameter of b-cyclodextrin allows the hydrocarbon chain to coil inside the cavity. [3] 26.4 (d, 2 J(P,C) 2.4 Hz; trans(syn)-PC(CH 3 ) 2

Who reads Micellization versus Cyclodextrin–Surfactant Complexation?

Author

Ana B. Dorrego; Luis García-Río; Pablo Hervés; José R. Leis; Juan C. Mejuto; Jorge Pérez-Juste

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Ltd.; Wiley; Research Square (ISSN 0044-8249)

Published

2000

Language

EN

Field

Chemistry (Physical Sciences)