Combined SAXS−Rheological Studies of Liquid-Crystalline Colloidal Dispersions of Mineral Particles

摘要: This article describes simultaneous rheological and small-angle X-ray scattering (SAXS) studies of complex fluids, using a modified rheometer that allows in situ synchrotron SAXS measurements. We investigated the behavior under shear stress lamellar liquid-crystalline suspensions, recently reported, comprised covalent mineral sheets H3Sb3P2O14 water, form sols gels. Two original nematic suspensions HSbP2O8 disklike H4Nb6O17 rodlike nanoparticles were also examined. correlate both existence yield strong decrease viscosity (shear-thinning behavior) with textural changes easily detected by SAXS. The exact nature phase (nematic or lamellar) does not seem to affect such phenomena as long there is orientational order. Moreover, strongly flow-birefringent shear-thinning isotropic anisotropic displayed very patterns shear.