Analysis of surface and bulk properties of amphiphilic drug ibuprofen and surfactant mixture in the absence and presence of electrolyte

被引:65
作者
Azum, Naved [1 ,2 ]
Rub, Malik Abdul [1 ,2 ]
Asiri, Abdullah M. [1 ,2 ]
机构
[1] King Abdulaziz Univ, Fac Sci, Dept Chem, Jeddah 21589, Saudi Arabia
[2] King Abdulaziz Univ, Ctr Excellence Adv Mat Res, Jeddah 21589, Saudi Arabia
关键词
Mixed micelle; Ibuprofen; Interaction parameters; Aggregation number; Micropolarity; DIMERIC GEMINI SURFACTANTS; AMITRIPTYLINE HYDROCHLORIDE; NONIONIC SURFACTANT; MIXED MICELLIZATION; CONVENTIONAL SURFACTANTS; AQUEOUS-SOLUTION; AGGREGATION BEHAVIOR; PHASE-SEPARATION; MICELLAR; BINARY;
D O I
10.1016/j.colsurfb.2014.06.009
中图分类号
Q6 [生物物理学];
学科分类号
071011 ;
摘要
In the present work, the micellization, adsorption and aggregation behavior of mixed drug-surfactant. systems, in the absence and presence of electrolyte (100 mM NaCl) were investigated by surface tension and fluorescence measurements. The critical micelle concentrations (cmc) of the mixtures fall between the values of the individual components, which indicate nonideal behavior of mixing of the components. On the basis of regular solution theory (RST), the micellar mole fractions of surfactant (X-1) and interaction parameter in solution (beta) were evaluated, while their interfacial mole fractions (X-1(sigma)) and interaction parameters at the interface (beta(sigma)) were calculated using Rosen's model. The results indicate that the surfactant's contribution is greater than that of the drug both at the interface and in micelles. The short and rigid hydrophobic structure of the drug resists its participation in micelle formation more than in the monolayer, leading to X-1 < X-1(sigma). Values of the surface excess (Gamma(max)) and minimum area per head group (A(min)) indicate attractive interactions. Gamma(max) increases and A(min) decreases as the surfactant mole fraction increases. The results have applicability in model drug delivery. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:158 / 164
页数:7
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