Dispersion containing relatively-high

In this experiment the optical and electrical transients were recorded simultaneously for a dispersion containing relatively high particle concentration. The current-time curve reveals that in the initial movement, two species transit the cell at different times. Clearly both cannot be due to the movement of the particles across the cell the simultaneous optical measurement demonstrates that the motion of the charged particles is contributing only to the second maximum. The first peak is due to excess ions in the suspension, presumably the charge control agent which is put in specifically to assure proper charging of the suspended particles. 

Dispersions of pol5Tetrafluoroethylene are colloidal emulsions of small pol mier particles (<0.25 pm) in water which are negatively charged. They contain relatively high concentrations of PTFE, which increases their specific gravity. An estimate of solids content can be obtained from the specific gravity (Table 5.12). 

Authigenic barium sulfate or barite [13462-86-7] is found in relatively high concentrations in sediments covering active diverging oceanic plate boundaries. It occurs as rounded masses containing up to 75% BaSO or as a dispersed constituent of the sediment. Its origins are uncertain, but it is likely that it is associated with hydrothermal actions. 

Lipstick and lip balms are usually concentrated suspensions of solid oils in a liquid oil, or in a mixture of liquid oils. The dispersed phase, about 60 mass%, comprises oils and/or wax that are solid at room temperature. The continuous phase, about 40 mass%, comprises an oil, or mixture of oils, that is liquid at room temperature. These products are formulated at relatively high temperature, where they are liquid, and are then cooled to allow a significant yield stress to develop. Lipsticks and lip balms contain a variety of waxes, oils, pigments, and emollients, including ... 

Exfoliation is also facilitated by mechanical methods such as the application of high-intensity ultrasound. High-intensity ultrasound is known to increase the rate of intercalation reactions. However, in recent studies on the exfoliation of the misfit layer compounds PbNb2S5 and SmNb2S5, some degree of dispersion was obtained by ultrasonic treatment in specific solvents such as ethanol and isopropanol. ° The solvents were not intercalated, but acted to stabilize the dispersions. The dispersions contained a substantial fraction of particles with fewer than 10 layers, but only a small fraction was exfoliated. Along with the ion exchange reaction under relatively severe conditions compared with other layered... 

---