TY - JOUR
T1 - Synergistic behavior of sodiumdodecylsulfate and 1,2-diheptanoyl-sn- glycero-3-phosphocholine in an aqueous medium
T2 - Interfacial and bulk behavior
AU - Sehgal, Pankaj
AU - Doe, Hidekazu
AU - Sharma, Manu
AU - Otzen, Daniel E.
PY - 2005/8/1
Y1 - 2005/8/1
N2 - The synergistic behavior of sodiumdodecylsulfate (SDS) and 1,2-diheptanoyl-sn-glycero-3-phosphocholine (DHPC) binary mixtures has been studied with interfacial and pyrene fluorescence(I1/ I3) intensity measurements. From the interfacial data, the interfacial parameters; the maximum surface excess (Γmax), or the minimum area per molecule (Amin), and the surface pressure at the critical micellar concentration (πcmc) have been evaluated. The cmc value has been used for evaluating the free energies of micellization (ΔG°m). The mixed micelle formation was evaluated with the help of the Clint equation. The SDS plus DHPC mixed micelles showed negative departure from ideality indicating synergistic interactions between the unlike components. The quantitative analysis of mixed micelle, mixed monolayer and the composition of the mixed micelle was carried out with the help of regular solution approximation. The interaction parameters, β and βσ, in the mixed micelle as well as in the mixed monolayer, respectively showed negative values indicating synergistic behavior of SDS and DHPC molecules.
AB - The synergistic behavior of sodiumdodecylsulfate (SDS) and 1,2-diheptanoyl-sn-glycero-3-phosphocholine (DHPC) binary mixtures has been studied with interfacial and pyrene fluorescence(I1/ I3) intensity measurements. From the interfacial data, the interfacial parameters; the maximum surface excess (Γmax), or the minimum area per molecule (Amin), and the surface pressure at the critical micellar concentration (πcmc) have been evaluated. The cmc value has been used for evaluating the free energies of micellization (ΔG°m). The mixed micelle formation was evaluated with the help of the Clint equation. The SDS plus DHPC mixed micelles showed negative departure from ideality indicating synergistic interactions between the unlike components. The quantitative analysis of mixed micelle, mixed monolayer and the composition of the mixed micelle was carried out with the help of regular solution approximation. The interaction parameters, β and βσ, in the mixed micelle as well as in the mixed monolayer, respectively showed negative values indicating synergistic behavior of SDS and DHPC molecules.
KW - DHPC
KW - Fluorescence behaviors
KW - Interfacial
KW - Mixed micelles
KW - SDS
UR - http://www.scopus.com/inward/record.url?scp=27644545897&partnerID=8YFLogxK
U2 - 10.1007/s00396-005-1315-4
DO - 10.1007/s00396-005-1315-4
M3 - Journal article
AN - SCOPUS:27644545897
SN - 0303-402X
VL - 283
SP - 1219
EP - 1225
JO - Colloid and Polymer Science
JF - Colloid and Polymer Science
IS - 11
ER -