▎ 摘　　要

NOVELTY - Preparing stabilized graphene oxide platelets, comprises at least the step of promoting, in a biphasic solvent system, the formation of an electrostatic assembly between graphene oxide platelets, and an efficient content of at least one hydrophobic and ionizable block copolymer. USE - The process is useful for: preparing stabilized graphene oxide platelets that is used as electronic material, preferably as electronic ink; preparing graphene oxide-based nanocomposites and/or reduced graphene oxide-based nanocomposites that are used as material in microelectromechanical systems generator, or as actuators, supercapacitors, high permittivity materials, dielectric sensors, conductive nanocomposites, antistatic composites, electromagnetic shielding films, electronic inks, conductive inks, conductive fibers, composites with barrier properties (water and oxygen), solar cells, material in catalysis, transparent and emissive displays, micromechanical resonators, transistors, as cathode in lithium-air batteries, ultrasensitive chemical sensors, conductive coatings, or as selective membranes (all claimed). ADVANTAGE - The process: utilizes graphene oxide platelets having high electrical, thermal, and mechanical properties and extremely high surface area, thus providing polymer nanocomposites having high performance (homogenous and flexible); utilizes graphene oxide as starting filler for composites that alters the Van der Waals interactions, thus facilitating good solubility in aqueous media and polar solvents, without the need of surfactant; is simple as the electrostatic attraction can be performed under ambient conditions via just promoting the surface contact between the platelets and the block copolymer and is cost effective as less block copolymer are required; allows the dispersion of graphene oxide platelets in non polar solvents; and provides robust and highly efficient electrostrictive materials for harvesting vibrational mechanical energy. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) a biphasic solvent system comprising a first aqueous solvent phase containing negatively charged graphene oxide platelets, and a second non polar solvent phase containing at least one hydrophobic and positively charged block copolymer, where the second non polar solvent phase containing a dispersion of stabilized graphene oxide platelets, and the platelets are under a form electrostatically assembled to at least one hydrophobic and charged block copolymer; (2) making graphene oxide-based nanocomposites comprising having electrostatically stabilized graphene oxide platelets obtained by the process, bringing together the platelets with at least one polymer or with polymerizable or condensable monomeric units in solution in an organic non-polar solvent phase, and promoting the formation of the expected nanocomposites containing the platelets; and (3) a reduced graphene oxide-based nanocomposite obtained by the process.