Loading patent…
AssigneeBoard of Regents, The University of Texas System
InventorsMelissa A. Wunch, Samsuddin F Mahmood, Duck J Yang
Estimating the term…
Graphene is a single layer carbon-based material known for high strength, high flexibility, high electrical conductivity, high surface area, hydrophobicity and barrier property. Introduction of surface functional groups on graphene enhances most of these properties. A facile and economical process to prepare amine and fluoride functionalized graphenes is disclosed. The disclosed processes utilize direct functionalization of pristine graphene without pre-functionalization (GO). Successful functionalization of both aminated and fluorinated graphenes were confirmed by the analyses of FT-IR, thermal gravimetric analysis (TGA), Raman, UV-Vis, and dispersion study. Amine functional groups can react with epoxy resin and urethane resin to form a covalent bond, and fluorinated graphene can give high hydrophobicity and durability, therefore both can be applied as a material or a component in polymer and composite coatings for corrosion protection, moisture or gas barriers.
A method for preparing an aminated graphene comprising reacting graphene with urea in a solvent or a solvent-deionized water mixture, and wherein the ratio of the graphene and the urea is in the range of 0.1-4.0 by weight.
A method for preparing an aminated graphene comprising a reaction by reacting graphene with an aminating reagent in a solvent-deionized water mixture, wherein the solvent-deionized water mixture includes at least one solvent selected from the group consisting of:
An aminated graphene, obtained in a reaction by reacting graphene with an aminating reagent in a solvent or a solvent-deionized water mixture, wherein the mass percentage of amine functional groups (—NH2) is in the range of 1%<—NH2<50%, mass percentage of carbon is in the range of 30%<C %<99%, and mass percentage of oxygen is in the range 0%<O %<0.1%.
Dependencies are inferred from the claim text.