Determination of Critical Micel Concentration of PEG-10 Tallow Propane Amine: Effects of Salt and pH

Abstract

Most applications of surfactants depend on formation and characteristics of micelle. In this study we measured critical micelle concentration (CMC) of cationic surfactant N, N', N'-polyethylene (10)-N tallow-1, 3-di amine propane (PEG-10 tallow) in aqua solution by using electrical conductivity and surface tension methods. The CMC value of PEG-10 tallow with two different methods was found very close to 1.40 × 10 −3 M with electrical conductivity, and 1.41 × 10 −3 M with surface tension. It also investigated the effect of inorganic salt (NaCl) and pH on micellization of cationic surfactant PEG-10 tallow. With increasing addition of NaCl, formation of micelle structure resulted in a higher CMC. However, at low salt concentrations smaller CMC value was observed comparing the critical micelle concentration of individual PEG-10 tallow. When it comes to the effect of changing pH in CMC of the PEG-10 tallow , it was clearly found that micelle formation or CMC of surfactant was independent on alkaline pH (between 6 and 10), but it was dependent on acidic pH (below 5).

From Surfactants to Viscoelastic Capsules

“…[ 38 ] Emulsion drops stabilized with polyethylene glycol (PEG) containing surfactants tend to coalesce if they are loaded with high concentrations of ions because salt partially collapses the PEG. [ 9 ] Indeed, drops that are stabilized with monocatechol functionalized surfactants, which are crosslinked with Fe 3+ , coalesce if loaded with 50 m m sodium chloride. By contrast, drops stabilized with the dicatechol functionalized counterpart that is crosslinked with Fe 3+ remain intact for at least 3 h even if loaded with 50 m m sodium chloride, as shown in the second row of Figure .…”

“…Unfortunately, cell culture media buffers that are preferentially used in most of these studies, often cause coalescence of emulsions, due to their salt contents. [ 9 ] This shortcoming can be addressed if double emulsions are used as they are less prone to coalescence if loaded with media containing high salt concentrations. [ 10 ] These double emulsions can be converted into capsules with well‐defined dimensions and compositions through the solidification of their shells.…”

Experimental Study of the Influence of Inorganic Salts on Foam Stability

“…Compared to the absolute values of the slopes of the various types of inorganic salt curves in Figure , the order of the strengths affecting the CMC of the solutions is Ca 2+ > Mg 2+ > NH 4 + . This is because different cations have various off-nuclear electron configurations and hydration capacities, − which are explored further below. Inorganic salt cations have a shielding effect on the electrostatic repulsion between surfactant ion head groups. − Salt ions can diminish the repulsion between surfactant ion head groups by compressing the thickness of the double electric layer, making it simpler to form gel clusters between surfactants, and therefore, the CMC value drops with increasing inorganic salt ion concentration. The effect on the electrostatic interaction of the ionized groups of SDS solutions differs due to the differences in the properties of the different ions themselves, i.e., different hydration capacities. It was shown that, for elements of the same main group, the smaller the atomic number, the larger the hydration radius, and the weaker the shielding effect on the SDS ion headgroup or the smaller the binding of counterions on the SDS ion headgroup .…”

Micellization Behaviour of Conventional (Sds and Dtab) and Synthesized Gemini Surfactant (12-2-12) in Aqueous Solutions of Metformin Hydrochloride at Varying Temperatures: A Comparative Study

“…They are essential components in biological and pharmaceutical processes, and so account for a significant amount of consumption in industrial and commercial applications. [1][2][3][4]. Due to peculiar property of binding at interfaces, they are utilized to number of purposes ranging from household utility to various industrial as well as biological processes.…”