Bicontinuous microemulsions micrographs

Fig, XIV-12. Freeze-fracture transmission electron micrographs of a bicontinuous microemulsion consisting of 37.2% n-octane, 55.8% water, and the surfactant pentaethy-lene glycol dodecyl ether. In both cases 1 cm 2000 A (for purposes of microscopy, a system producing relatively coarse structures has been chosen), [(a) Courtesy of P. K. Vinson, W. G. Miller, L. E. Scriven, and H. T. Davis—see Ref. 110 (b) courtesy of R. Strey—see Ref. 111.]... 

The development of polymerizable microemulsions consisting of only three basic components (except a water component) for producing transparent solid polymers with nanostructure is a recent achievement [87]. For example. Fig. 5 shows the SEM micrograph of the fractured polymer prepared by the UV-initiated polymerization of a bicontinuous microemulsion consisting of 35 wt% water, 35 wt% AUDMAA and 30 wt% MMA. This micrograph reveals randomly distributed bicontinuous nanostructures of water channels and polymer domains. The widths of the bicontinuous nanostructures were about 40-60 nm. The sizes of the nanostructures can be readily reduced by adding 2-hydro-... 

Figure 1.20 Micrographs of a bicontinuous microemulsion of the system H20-n-octane-C 2Es prepared near the X-point at 4> = 0.50, -y = 0.06 and T = 32.4°C. (a) Freeze-fracture direct imaging (FFDI) picture showing particularly in the middle of the image a sponge-like bicontinuous structure consisting of white and black domains. Note that the colours are inverted, (b) The freeze-fracture electron microscopy (FFEM) picture supports the FFDI result. (From Ref. [105], reprinted with permission of the American Chemical Society.)...

Freeze fracture Electron micrograph of bicontinuous microemulsion... 

Figure 1.7 Freeze-fracture electron micrographs showing the structure of the microemulsion phase in the system water/n-octane/Ci2E5. Top microemulsion with a droplet structure that shows the random distribution of the droplets and their small poly-dispersity. Bottom bicontinuous microemulsion that displays the saddle-shaped structures of the film separating oil domains (grained aspect) from water domains (smooth aspect). Reproduced from reference 47 with permission of Springer Verlag.

Figure 7.4 Freeze-fracture SEM micrograph mesoporous polymeric networks obtained by sulphur monochloride cross-linking of polyisoprene in bicontinuous polymeric microemulsions of polyisoprene and polystyrene. (From Ref. [9], reprinted with permission of the American Chemical Society.)...

Figure 12 Micrographs from a series of control experiments to establish the globular-to-bicontinuous transition in microemulsion microstructures. Bar = 250 nm. (From Ref 9.)...

Figure 10.4 Pseudotemary phase diagram showing mono- and biphasic regions of a system comprising surfactant/cosurfactant (s), oil (o), and water (w) and elucidation of w/o-, o/w-, and bicontinuous-type microemulsion zones along with their dispersion level scheme and electron micrographs.

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