The good aqueous suspensions of amphiphilic aminated carbon black nanoparticles (CB-EDA)are prepared via situ grafted methodby industrial carbon black for treating 10.0wt% crude oil in water emulsions (pH = 8.9). The structure and morphology characterization of CB-EDA were explored by Fourier transform infrared spectroscopy (IR),X-ray photoelectron spectroscopy (XPS),Atomic force microscopy (AFM),and high-resolution transmission electron microscopy (TEM). Encouragingly,the demulsification tests indicated that the residual oil in separated water samples was as low as 53.45 mg / L,corresponding to a demulsification effect of over 99.90% at optimum dosage. Besides,the CB-EDA,graphene oxide (GO),reduced graphene oxide (rGO),and hydroxylated carbon black (CB-PVA)for detachment oil from the crude oil-in-water emulsion under alkaline conditions are studied. The zeta potential measurement and mechanism analysis results revealed that CB-EDA has better demulsification efficiency and universality than other nanocarbon-based demulsifiers at ambient temperature. As an amphiphilic nanocarbon-based material,the CB-EDA prefer to migrate to the oil / water interface after add into emulsions adding once CB-EDA is reached at the oil / water interface which can displace the emulsified molecules of the emulsion by strong π-π / n-π interaction. More importantly,the zeta potentials are CB-EDA is positive,which can compress double electric layer of dispersed oil droplets to promote emulsified oil droplets accumulation. In the current work,we overcame the disadvantages of the nanocarbon-based demulsifiers,effectively improved their efficiency and universality,and developed a promising CB-EDA demulsifier for the separation of O / W emulsion. © 2023 Cailiao Daobaoshe/ Materials Review. All rights reserved.
