Adsorption of polyelectrolytes and polyelectrolytes-surfactant mixtures at surfaces: a physico-chemical approach to a cosmetic challenge

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

“…Mixtures of water-soluble polymers and surfactants are widespread in industry and can be found in cosmetic products, paints, coatings, detergents, and oil recovery. [1][2][3] Nevertheless, to gain knowledge on the basic properties of such complex mixtures, it is required to investigate systematically the different types of involved interactions, although a few review articles compare bulk to surface properties. [4][5][6] Systematic studies on correlations of the simultaneously occurring effects were rarely performed.…”

Physicochemical Aspects of the Performance of Hair-Conditioning Formulations

“…Thus, when hair fibers undergo certain physical or chemical processes, the lipid barrier, i.e., F-layer, can be damaged. This results in the removal of the first protection of the hair fibers, yielding into a worsening of the mechanical properties of the hair fibers [9]. The medulla is a loosely packed and disordered region representing the central core of the hair fibers and is composed of a nucleus of central cells, which appears different depending on the type of hair.…”

“…The optimization of shampoo and conditioner formulations necessitates a careful examination of the different physicochemical parameters related to the conditioning mechanism, e.g., the thickness of the deposits, its water content, topography or frictional properties. This review discusses different physicochemical aspects which impact the understanding of the most fundamental bases of the conditioning process.Cosmetics 2020, 7, 26 2 of 21 cationic polyelectrolytes and silicones, onto a surface with a relatively large area (typically~6 m 2 for a head with 20 cm long hairs) [9] which necessitates a careful examination of the physicochemical bases underlying such deposition processes [10][11][12][13][14].Most of the currently used formulations are composed by supramolecular complexes formed by the interaction of cationic polyelectrolytes (namely polycations) and surfactants (mainly negatively charged and zwitterionic). Such supramolecular complexes may appear as soluble complexes or phase-separated systems [15][16][17][18], with the state in which the complexes are found depending on the concentration of compounds involved in the formulation, the temperature and/or the ionic strength.…”

“…Cosmetics 2020, 7, 26 2 of 21 cationic polyelectrolytes and silicones, onto a surface with a relatively large area (typically~6 m 2 for a head with 20 cm long hairs) [9] which necessitates a careful examination of the physicochemical bases underlying such deposition processes [10][11][12][13][14].…”

Synergetic effect of sodium polystyrene sulfonate and guanidine hydrochloride on the surface properties of lysozyme solutions

“…[1][2][3][4] The interest in these systems stems from their applications in biocatalysis, biosensoring, protein separation and purication, and drug delivery. [1][2][3][4][5] Information on the mechanisms of formation of primary complexes in dilute solutions and especially on their surface properties is quite scarce. At the same time, the main focus of studies of complex formation between proteins and polyelectrolytes is the bulk properties of concentrated solutions and the formation of coacervates.…”