Summary
The shear orientation of a micellar hexagonal liquid crystalline phase was investigated by small-angle neutron scattering. The hexagonal phase in the quiescent state showed a symmetrical scattering pattern typical of a polydomain structure. Enhanced scattering along the flow direction was observed during shear and the anisotropy of scattering intensity became stronger with increasing shear rate. The anisotropic scattering pattern corresponds to an orientation perpendicular to the flow direction and can be interpreted as a log-rolling state. The oriented sample did not relax after cessation of shear. The results from small-angle neutron scattering confirm data obtained previously from rheo-small angle light scattering measurements and are discussed in comparison to shear alignment of lyotropic liquid crystalline polymer solutions.
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Richtering, W., Schmidt, G. & Lindner, P. Small-angle neutron scattering from a hexagonal phase under shear. Colloid Polym Sci 274, 85–88 (1996). https://doi.org/10.1007/BF00658914
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DOI: https://doi.org/10.1007/BF00658914