Abstract

AbstractSummary: Shear‐induced orientation of nanoparticles in poly(ethylene oxide)/Laponite RD hydrogels has been investigated by small angle neutron scattering (SANS). As temperature is reduced, anisotropy develops at lower shear rates. The two‐correlation length Debye–Anderson–Brumberger (DAB) model provides a good fit to the experimental data. The deduced short‐range correlation length (≈5 nm) is observed to increase with shear. The long‐range correlation length (≈50 nm) shows a strong directional dependence, and decreases when shear is applied. The relative contribution of long‐range order to the SANS intensity is observed to increase with shear and decrease with temperature.SANS anisotropy |(Iy − Ix)/(Iy + Ix)| as a function of shear rate and q at 2 °C.magnified imageSANS anisotropy |(Iy − Ix)/(Iy + Ix)| as a function of shear rate and q at 2 °C.

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