Osmotically driven shape-dependent colloidal separations

2019-12-20 17:03:07

dependent colloidal attractive separations microdisks

责任者: Mason, T.G. 单位: Corporate Strategic Res., ExxonMobil Res. & Eng. Co, Annandale, NJ, USA 来源出处: Physical Review E (Statistical, Nonlinear, and Soft Matter Physics)(Phys. Rev. E, Stat. Nonlinear Soft Matter Phys. (USA)),2002/12/,66(6):60402-1 摘要: The thermally induced motion of nanometer-sized surfactant micelles in water is used to create strong attractive forces between micron-sized disks of wax in a mixed aqueous dispersion of microdisks and microspheres. The short-ranged attractive force due to the depletion of micelles from between the microdisks is much stronger than that between two microspheres of similar size, and is largest when the disks approach face to face, so columns of microdisks form. These columns cream, whereas the spheres remain dispersed, providing a means for shape-dependent colloidal separations driven by an applied micellar osmotic pressure 关键词: colloids;osmosis;phase separation;separation;surfactants;osmotically driven shape-dependent colloidal separations;thermally induced motion;nanometer-sized surfactant micelles;water;attractive forces;micron-sized disks;microsphere size;wax discs;mixed aqueous dispersion;microdisks;microspheres;short-ranged attractive force;micelle depletion;microdisk columns;cream;dispersed spheres;applied micellar osmotic pressure;shape-dependent colloidal separations