Micellar Solutions and Microemulsions: Structure, Dynamics, and Statistical ThermodynamicsDuring the last decade there has been a renewed interest in research on supramolecular assemblies in solutions, such as micelles and microemulsions, not only because of their extensive applications in industries dealing with catalysts, detergency, biotechnology, and enhanced oil recovery, but also due to the development of new and more powerful experimental and theoretical tools for probing the microscopic behavior of these systems. Prominent among the array of the newly available experimental techniques are photon correlation spectroscopy, small-angle neutron and X-ray scattering, and neutron spin-echo and nuclear magnetic resonance spectroscopies. On the theoretical side, the traditionally emphasized thermodynamic approach to the study of the phase behavior of self-assembled systems in solutions is gradually being replaced by statistical mechanical studies of semi-micro scopic and microscopic models of the assemblies. Since the statistical mechanical approach demands as its starting point the microscopic struc tural information of the self-assembled system, the experimental determina tion of the structures of micelles and microemulsions becomes of paramount interest. In this regard the scattering techniques mentioned above have played an important role in recent years and will continue to do so in the future. In applying the scattering techniques to the supramolecular species in solution, one cannot often regard the solution to be ideal. This is because the inter-aggregate interaction is often long-ranged since it is coulombic in nature and the interparticle correlations are thus appreciable. |
Contents
Interparticle Correlations in Concentrated Charged Colloidal | 3 |
Statistical Mechanics of Interacting Double Layers 29 | 29 |
Computer Simulation Studies of the Electrical Double Layer | 51 |
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Micellar Solutions and Microemulsions: Structure, Dynamics, and Statistical ... Sow-Hsin Chen,Raj Rajagopalan No preview available - 1990 |
Common terms and phrases
amphiphile approximation attractive interactions bicontinuous Brownian Brownian dynamics calculated charge density Chem chemical potential Chen coexistence curve colloidal computer experiments concentration constant correlation function correlation length counterions critical point curvature cylindrical diameter dilute dispersions DLVO DLVO theory double layers droplets dynamics effects electrolyte electrostatic equation equilibrium experimental exponents FIGURE film fluctuations fluid force free energy globules hard-sphere head group HNCA hydrodynamic interfacial tensions interparticle ionic ions J.S. Huang lamellar Lett light scattering liquid macroion measured micellar solutions micelles microemulsion mixture molecular molecules Monte Carlo neutron scattering number density obtained oil and water parameters percolation percolation threshold phase diagram phase separation Phys polydispersity predicted radial distribution function radius ratio region repulsion S.A. Safran samples scattering intensity simulation solvent spheres spherical statistical mechanical structure factor surface charge surfactant temperature theoretical thermodynamic tion volume fraction Waals water in oil