منابع مشابه
A molecular framework for modelling the surface tensions and surface excesses of dilute surfactant solutions
The straightforward molecular modelling of an aqueous surfactant system at concentrations below the critical micelle concentration (pre-cmc) conditions is unviable in terms of the presently available computational power. Considering a typical nonionic surfactant, a fully atomistic simulation that includes several micelles will require in excess of O(10) atom sites and several nanoseconds of rea...
متن کاملSingle Bubble Sonoluminescence and Bubble Surface Stability in Surfactant Solutions
The radial dynamics of a single sonoluminescing bubble has been investigated in surfactant solutions. Experimental results show that an increase in the surfactant concentration leads to a decline in the oscillation amplitude and hence light emission intensity. Numerical simulations support this result, showing that under the driving pressures required to achieve single bubble sonoluminescence (...
متن کاملSurface Composition of Surfactant - stabi I ised Polypyrrole Colloids
We have examined a colloidal dispersion of surfactant-stabilised polypyrrole particles by surface-enhanced Raman spectroscopy (SERS), time-of-flight secondary ion mass spectroscopy (TOF-SIMS) and X-ray photoelectron spectroscopy (XPS). These surface-specific techniques have enabled us to probe the surface composition of the conducting polymer particles. Al l three techniques indicate that the p...
متن کاملRheology of Surfactant Solutions
Several surfactant molecules self-assemble in solution to form long, flexible wormlike micelles which get entangled with each other, leading to viscoelastic gel phases. We discuss our recent work on the rheology of such a gel formed in the dilute aqueous solutions of a surfactant CTAT. In the linear rheology regime, the storage modulus G(ω) and loss modulus G(ω) have been measured over a wide f...
متن کاملA device for the automatic determination of the surface tension of surfactant solutions
An experimental device and procedure are described for the fully automatic determination of the surface tension of liquids and (particularly) surfactant solutions. The computercontrolled system is capable of yielding precise and reproducible values of that quantity. The possibilities of equilibration times selected by the user. cleaning the surface by suction. and adding fresh solution prior to...
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ژورنال
عنوان ژورنال: Nippon kagaku zassi
سال: 1958
ISSN: 0369-5387,2185-0917
DOI: 10.1246/nikkashi1948.79.1088