THESIS
2022
1 online resource (xvi, 71 pages) : illustrations (some color)
Abstract
This thesis presents the theory and experimental results on two topics: the
electroosmotic (EO) pump and the electrorheological effect in microemulsions. In the
first section, I gave the theoretical background, the sample fabrication and
experimental measurements of the fluid flow for the electroosmotic pump. The
electroosmotic pump is basically a simple microchannel in which the channel wall
exhibits the charge separation effect. The result of the experiment shows that when an
electric field was applied across the microchannel, there can be fluid flow with no
moving parts, i.e., the electroosmotic pump operates as a pump with no moving components. My results also show that the efficiency of the electroosmotic pump
increases with decreasing channel diameter, thereby verifying the EO to...[
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This thesis presents the theory and experimental results on two topics: the
electroosmotic (EO) pump and the electrorheological effect in microemulsions. In the
first section, I gave the theoretical background, the sample fabrication and
experimental measurements of the fluid flow for the electroosmotic pump. The
electroosmotic pump is basically a simple microchannel in which the channel wall
exhibits the charge separation effect. The result of the experiment shows that when an
electric field was applied across the microchannel, there can be fluid flow with no
moving parts, i.e., the electroosmotic pump operates as a pump with no moving components. My results also show that the efficiency of the electroosmotic pump
increases with decreasing channel diameter, thereby verifying the EO to be an
interfacial effect.
In the second section, the electrorheological effect in water-in-oil
microemulsions is presented in both its theoretical and experimental aspects. Based
on the theory of the dielectric electrorheological effect and the giant
electrorheological effect, a device for observing and recording data of the
microemulsions was made. The experimental results show that by applying an electric
field to the water-in-oil microemulsions under the constant flow rate condition, one
can observe a measurable pressure difference that correlates with the applied field,
i.e., the electrorheological effect. This effect is apparently caused by the
rearrangement of microemulsion particles into aligned columns along the applied
field direction. Also, the experimental results show that the pressure difference
increases with decreasing size of the microemulsion particles.
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