A shear cell is developed for small-angle neutron scattering measurements in the velocity-velocity gradient plane of shear and is used to characterize complex fluids. Spatially resolved measurements in the velocity gradient direction are possible for studying shear-banding materials. Applications include investigations of colloidal dispersions, polymer solutions, and self-assembled structures.
The overall goal of this procedure is to use small angle neutron scattering sands with a sheer cell sample environment to study the microstructure of complex fluids in the velocity velocity gradient plane of shear. This is accomplished by first assembling a well sealed shear cell sample environment. The second step is to attach the shear cell to the cell mounting bracket located on the red board in the sample environment stage of the neutron beam line.
Next, the sample is carefully loaded into the shear cell so as to avoid air bubbles being introduced into the experimental volume, the final step is to run the experiment first by defining the shear rate at which the sample is sheared using motor control software. And second, to set up the desired sands experiments according to the standardized sands procedures. Ultimately, the sands shear cell sample environment is used to measure the spatiotemporal microstructure of a shearing complex fluid.
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