Silica-based amphiphilic Janus nanofluid with improved interfacial properties for enhanced oil recovery

Application of Novel Amphiphilic Janus-SiO2 Nanoparticles for an Efficient Demulsification of Crude Oil/Water Emulsions

“…In the FT-IR spectra, the strong peak at 1090 cm –1 was ascribed to the asymmetric stretching vibration absorption of Si–O–Si . The broad peak at around 3400 cm –1 was associated with the stretching vibration of O–H . The peak of the hydroxyl group might overlap the peak of N–H, which was normally observed at about 3300–3500 cm –1 .…”

“…Wu et al synthesized amphiphilic Janus-SiO 2 -based nanoparticles to enhance oil recovery. By injecting 100 mg/L Janus nanofluids, the displacement experiments indicated that the increments of the oil recovery could reach 15.74% . Hong et al primarily prepared the amphiphilic Janus-SiO 2 (Janus-C18) nanoparticles, which were widely used in biomedicine, chemical engineering, and so on. , To the best of our knowledge, there are few reports about the application of amphiphilic Janus-SiO 2 nanoparticles in the demulsification of O/W emulsion.…”

Janus Particles at Fluid Interfaces: Stability and Interfacial Rheology

“…Therefore, in addition to the physicochemical properties of the stabilizer, an effective stabilization depends on the flow behavior of the stabilizer in response to applied stresses [ 96 ]. For example, amphiphilic silica-based Janus nanoparticles (diameter of nm) not only resulted in a reduction of oil/brine interfacial tension but also led to an increase of the interfacial shear viscosity such that their utilization in nanofluids wt.%) yielded an enhancement in oil recovery by % compared to homogenous particles [ 97 ]. In stabilization of Pickering foams using Janus particles, the enhanced stability has been correlated with the high dilational elasticity and mechanical strength of the interface in presence of Janus particles [ 75 , 76 ].…”

pH-Responsive Nanoemulsions Based on a Dynamic Covalent Surfactant

“…Among these external stimulation types, pH has attracted particular interest because it has the advantage of being simple to regulate [11,21]. The widely studied pH-responsive emulsifiers for EOR applications are particle-based [5,22,23]. However, solid particles in the flooding fluid can cause problems, such as permanent clogging of the rock pores, particularly when these pores are small or if the particles in the utilized Pickering emulsion tend to flocculate or aggregate [5,24].…”