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Emuglents - Assignment Example

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When a second emulgent is added to a system, the formation of the emulsion is favored due to formation of a more stable interfacial film (surface tension theory), viscosity modification and/or creation of more profound repulsive films over the dispersed phase molecules…
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Download file to see previous pages This means that the initial droplet size will drop from the value of 8 (though also highly dependent on applied energy). Furthermore, the creaming percentages will also reduce. This is due to the fact that an increase in emulgent concentration leads to a higher viscosity emulsion. This affects the speed of migration of the dispersed phase, and thus slows creaming and subsequent coalescence. After re-dispersion, the particulate size will be reduced. This is because, if the repulsion theory holds, some micelles may remain formed, and these will have a smaller size than the initial coalesced molecule size.
The C4 has a large droplet size with a reducing creaming percentage. This is interesting, as it implies increasing stability of the emulsion. According to Stokes-Einstein equation (Chern 2008), it is clearly deducible. A droplet will float upwards at ever increasing speeds in response to the buoyancy force until the velocity is sufficient to allow the frictional force to exactly match it. When
With the addition of a second emulgent, the viscosity may cause an increased coefficient of friction to a point whereby the emulsion C4 will be stable (unlike the other emulsions). This will drastically reduce the creaming and coalescence. The resultant particle size after eventual coalescence may be smaller due to the same factor of micelle ...Download file to see next pagesRead More
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