“…TritonX-100 even though a non-ionic one, shows a negative potential possibly due to the large number of oxygen atoms of the oxyethylene groups. Literature survey also reveals the similarities of the microenvironment of anionic surfactants and polyoxyethylated non-ionic surfactants [29,[64][65][66]. While probing the micelles of a series of polyoxyethylated non-ionic surfactants [64] and anionic surfactant SDS through the measurements of pK of a number of aldimines we have observed the similarities in the environment provided by these two categories of surfactants.…”
Section: Zeta Potential Measurementmentioning
confidence: 69%
“…Literature survey also reveals the similarities of the microenvironment of anionic surfactants and polyoxyethylated non-ionic surfactants [29,[64][65][66]. While probing the micelles of a series of polyoxyethylated non-ionic surfactants [64] and anionic surfactant SDS through the measurements of pK of a number of aldimines we have observed the similarities in the environment provided by these two categories of surfactants. Using lipoid pH indicators as probes Fernadez and Fromherz [65] have made similar observations during the measurement of the electrical potential and polarity of SDS and TX-100 micelles.…”
“…TritonX-100 even though a non-ionic one, shows a negative potential possibly due to the large number of oxygen atoms of the oxyethylene groups. Literature survey also reveals the similarities of the microenvironment of anionic surfactants and polyoxyethylated non-ionic surfactants [29,[64][65][66]. While probing the micelles of a series of polyoxyethylated non-ionic surfactants [64] and anionic surfactant SDS through the measurements of pK of a number of aldimines we have observed the similarities in the environment provided by these two categories of surfactants.…”
Section: Zeta Potential Measurementmentioning
confidence: 69%
“…Literature survey also reveals the similarities of the microenvironment of anionic surfactants and polyoxyethylated non-ionic surfactants [29,[64][65][66]. While probing the micelles of a series of polyoxyethylated non-ionic surfactants [64] and anionic surfactant SDS through the measurements of pK of a number of aldimines we have observed the similarities in the environment provided by these two categories of surfactants. Using lipoid pH indicators as probes Fernadez and Fromherz [65] have made similar observations during the measurement of the electrical potential and polarity of SDS and TX-100 micelles.…”
“…From earlier studies [19,20] we have seen that CTAB forms a micelle with some fatty patches exposed to water [62]. Studies on the hydroxylation of Rosaline hydrochloride in the presence of CTAB [19] suggest that about 9% of hydrophobic patches are exposed to water.…”
Section: Micropolarity and Aggregation Number Of Mixed Systemsmentioning
confidence: 96%
“…OP-30 with 30 oxyethylene units as its hydrophilic moiety and a phenyl ring in its nonpolar part is judiciously selected because of its applications in industrial and household processes [17,18]. In our earlier studies [19,20] we have also seen that this type of polyoxyethylated alkyl surfactants aggregates with substantial exposure of their hydrophobic groups to the bulk water and hence they can be readily accessible to the incoming substrates for hydrophobic interaction. In order to investigate the role of the molecular state of the surfactants on the interactions, the process of micelle formation of CTAB has been studied in the presence of OP-30, both below and above its critical micelle concentration (CMC).…”
“…The central cis double bond in the oleyl group of Tween-80 may also introduce a kink during the packing at the interface. [10,46,47] As the emulsifier is added to an immiscible solution of oil two conjugate solutions [21] are formed due to the partitioning of emulsifier to both oil and water phase: a saturated solution of oil in water (rich in water) and other saturated solution of water in oil (with rich in oil). The location of plait point P; the point at which the two conjugate solutions have the same composition, closer to EO line (Figure 2) also conforms to the relatively more solubility of emulsifier in water than in oil.…”
Section: Measurement Of Electrical Conductivitymentioning
In Tween-80:alkanol-oil-water pseudoternary system the area of the subregions are found to depend upon the molecular volume and structural hierarchy of oil and cosurfactants used. The threshold weight fraction of 0.35 for cosurfactant in emulsifier, required to get maximum area of bicontinuous region is attributed to difference in solubility of the emulsifier in oil and water. The measurement of different physicochemical parameters conforms to the phase transition from w/o to o/w through bicontinuous region.The phase behavior of Tween-80:alkanol-oil-water systems have been studied at 30 C by varying the composition of the emulsifier. The areas of both isotropic and anisotropic regions are found to depend on the type of alcohols and oil used. The results have been attributed to the constraints in packing at the interface due to difference in molar volume as well as structural hierarchy in threedimensional space. The percolation transition is evident from conductivity studies. The determination of area of the sub-regions as a function of surfactant:cosurfactant ratio reveals the existence of a maximum value for bicontinuous region at 0.35 weight fraction of cosurfactant in the emulsifier. This threshold weight fraction has been attributed to the difference in limiting solubility of emulsifier in water and oil. The phase inversion leading to drastic structural changes has been suggested from physicochemical properties measurements.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.