CO2/N2 responsive gel emulsion and preparation method thereof

The invention discloses a CO2/N2 responsive gel emulsion and a preparation method thereof, and the preparation method comprises the following steps: dispersing maleopimaric acid glycidyl methacrylate 3-dimethylaminopropylamine imide (MPAGN) in water to obtain a dispersion liquid, and introducing CO2 into the dispersion liquid to obtain an MPAGNH < + > aqueous solution; and dispersing the Tempo oxidized nanocellulose in an MPAGNH < + > aqueous solution to obtain a water phase, and shearing the water phase and the oil phase to obtain the target product gel emulsion. The gel emulsion has high viscosity and good mechanical properties, can stably exist for a long period of time, and can exist inversely. Nitrogen is introduced into the obtained emulsion for 30-60 min, complete demulsification can be achieved, CO2 is introduced again, an emulsion with the particle size consistent with that of the emulsion in the first time can be formed after shearing, and the process can be repeated for multiple times. After demuls