Polymer-Surfactant Interactions and the Effect of Tail Size Variation on Micellization Process of Cationic ATAB Surfactants in Aqueous Medium

Kaur

et al. 2014

J Surfact & Detergents

The micellization behaviour of sodium dodecyl sulphate, sodium dodecylbenzenesulfonate, hexadecyltrimethylammonium bromide, tetradecyltrimethylammonium bromide, and cetylpyridinium chloride in water and in aqueous solutions of polyethylene oxide (PEO, molecular weight = 100,000) having concentrations (0.005-0.04 %, w/v) has been studied at different temperatures (288.15-318.15 K) using conductivity, surface tension, and viscosity methods. From conductivity measurements various micellar parameters, like critical micellar concentration (CMC), critical aggregation concentration (CAC), polymer saturation point (PSP), degree of ionization (b), and standard free energy of transfer (DG 0 t ), have been calculated. CAC values have been found to decrease with polymer concentration and increase with temperature. However, the PSP values increase with both polymer concentration and temperature for all surfactants. Similar parameters have also been calculated from surface tension data (CMC r , CAC r , PSP r ) along with other parameters such as maximum surface excess concentration at the air/water interface (C max ), minimum area per molecule (A min ), and packing parameter (p). The CMC r , CAC r , and PSP r values are smaller than the corresponding CMC, CAC, and PSP values, but both show similar behaviour with temperature and concentration of polymer. Various parameters indicate that the presence of the aromatic ring in the head group of surfactant decreases its interaction with PEO, whereas the increased hydrophobicity in the tail leads to stronger interactions with PEO. Viscosity studies further supplement the conclusions drawn from the above results.

Section: Comparison Of Micellar Behaviour In Aqueous Peo Solutionssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Effect of Head Groups, Temperature, and Polymer Concentration on Surfactant—Polymer Interactions

Kaur

et al. 2014

J Surfact & Detergents

Surface & Interface Analysis

“…For example, Goddard and Hannan reviewed various aspects of bulk properties in polymer/surfactant solutions . Here, the surfactant binds cooperatively to the polymer, and different critical concentrations can be distinguished . The first concentration, known as critical aggregation concentration (cac), represents the onset of the formation of premicellar aggregates in the vicinity of the polymer.…”

Section: Introductionmentioning

confidence: 99%

“…The interfacial properties of such solutions have been studied frequently mainly by interfacial tension measurement . For surfactant solutions and surfactant mixtures, the surface tension is influenced by processes taking place in the bulk phase as, for instance, the formation of micellar aggregates.…”

Section: Introductionmentioning

confidence: 99%

Surfactant‐mediated formation of alginate layers at the water‐air interface

Degen

Paulus

Zwar

et al. 2019

The self‐organization process of polysaccharide alginate with different cationic surfactants at the water‐air interface was investigated over a wide concentration regime. The changes of surface properties determined by surface tension measurements, surface rheology, and X‐ray reflectivity are correlated with changes of bulk properties measured by turbidity, light scattering, and zeta potential measurements. We demonstrate that the interactions between the alginate and cationic surfactants result in significant changes of bulk and interfacial properties. The results of surface shear experiments point to the existence of highly viscoelastic interfacial films. In combination with X‐ray reflectivity, we demonstrate that these rheological features are related to polymer‐surfactant associations at the interface. In the regime of high surfactant concentrations, we observed the existence of multilayer structures.

Eurasian Chem. Tech. J.

“…These drugs may interact with polymers in surfactant-like manner, i.e., there may exist cac, cmc or psp (polymer saturation point) [48]. The cac, the start of aggregation, is either near or well below the cmc of pure amphiphile [49] while the cmc is assigned to saturation of polymer domains by the monomers and/or micelle-like aggregates [24,[50][51][52][53]. Above cmc, formation of normal micelles takes place.…”

Section: Polymer-amphiphile Interactionsmentioning

confidence: 99%

Polymer-Amphiphile Interactions: An Overview

Panda

Kamil

2017

Interactions between the polymers and amphiphiles in aqueous solutions have generated considerable interest among researchers because of the widespread applications, relatively complex behavior and improved physicochemical properties of the mixtures. Numerous studies on the surfactant-polymer systems have been carried out in recent years and the number of scientific reports has considerably increased. Various applications of polymers in different areas and many works concerning the amphiphiles are being published every year. Usually, the mixed systems containing polymers and amphiphiles show solution properties different from those of individual solutions due to interaction between the components. The present review article mainly focuses on the behaviour of polymers in aqueous solutions, in the absence or presence of amphiphiles, such as surfactants, drugs, etc. It also summarizes effect of the nature of amphiphiles on aggregation properties of polymers in aqueous solution, and interaction of conventional as well as gemini surfactants with polymers.