Patent attributes
An amphoteric two-dimensional nanosheet and a preparation method thereof are provided. The amphoteric two-dimensional nanosheet is prepared by the following steps: uniformly dispersing few-layered graphene oxide into toluene and then adding alkylamine coupling agent to a mixture of the few-layered graphite oxide and the toluene for reaction; amine terminated graphite oxide dispersion that has been prepared is fully dispersed in toluene-dimethylformamide mixed solvent, and then, alkyl glycidyl ether is added into the above solution for reaction, so as to obtain the amphoteric two-dimensional nanosheet. The amphoteric two-dimensional nanosheet of the present disclosure can be prepared by modifying two-dimensional graphite oxide, to spontaneously form water-in-oil Pickering emulsion at an oil-water interface, compared with emulsion of conventional surfactants, the present disclosure can effectively stabilize the waterflooding front, improve the sweep volume of waterflooding, have a simple synthesis process for convenient large-scale production, and be widely used in waterflooding development reservoirs.
