The Syntheses of New Type Janus Intelligence Nanometer Microsphere Oil Displacement Agent

The shells of polystyrene hollow microspheres were impregnated with three-(methacryloyloxy) propyltrimethoxysilane (MPS), aminopropyltriethoxysilane (APTES) and ethyl orthosilicate (AEOS). The lipophilic and hydrophilic groups were introduced into the polystyrene matrix and the Janus structure is formed through aqueous phase by self-assembly on the surface of the shell by sol-gel process. In order to obtain the silica-based composite Janus nanomaterials, wedissolve and remove polystyrene, we can regulate the microstructure of Janus nanomaterials through changing the pH value of the reaction system and the amount of monomer, and then the Janus hollow spheres and nanosheets can be obtained.