Structure and dynamics of microemulsion-based gels
The structure and dynamic properties of microemulsion based gels formed by water/AOT/heptane in the presence of gelatin have been invesigated. The gels are optically transparent, single phase systems. Measurements of electrical conductivity and tracer diffusion (T2O and 22NaCl) have been made. Transmission electron micrographs of the freeze-fractured gels are also presented. The results indicate that the dynamic properties of the system are a sensitive function of both temperature and composition. With suitable formulations the conductivity can change over several orders of magnitude for a narrow temperature range. Results from the tracer diffusion studies parallel those from the conductivity data. In a stiff gel (high gelatin content), electron microscope studies indicate a very different structure from that in weakly-gelled systems.
Key wordsDynamics structure microemulsion-based gels tracer diffusion conductivity
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