Amphiphilic Rhamnolipid Molybdenum Disulfide Nanosheets for Oil Recovery

Qu, Ming; Hou, Jirui; Liang, Tuo; Qi, Pengpeng

doi:10.1021/acsanm.1c00102

Cited by 39 publications

(14 citation statements)

References 72 publications

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“…The assembly of nanoparticles at the oil–water interface has received widespread attention and has been extensively studied by numerous investigators. These studies include but are not limited to food processing and production, − drug encapsulation, , environmental remediation, − and enhanced oil recovery. − The interest stems from the fact that particle-laden interfaces offer a route to controlled interfacial properties, including the ultimate stability of an emulsion. − Oil droplets surrounded by particles result in improved viscoelastic properties of the interface. Hence, emulsion breakup, coalescence, or coarsening can be circumvented or slowed. ,− …”

Section: Introductionmentioning

confidence: 99%

Probing the Interfacial Properties of Oil–Water Interfaces Decorated with Ionizable, pH Responsive Silica Nanoparticles

et al. 2023

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Particle-stabilized emulsions (Pickering emulsions) have recently attracted significant attention in scientific studies and for technological applications. The interest stems from the ease of directly assembling the particles at interfaces and modulating the interfacial properties. In this paper, we demonstrate the formation of stable, practical emulsions leveraging the assembly of ionizable, pH responsive silica nanoparticles, surface-functionalized by a mixture of silanes containing amine/ammonium groups, which renders them positively charged. Using pH as the trigger, the assembly and the behavior of the emulsion are controlled by modulating the charges of the functional groups of the nanoparticle and the oil (crude oil). In addition to their tunable charge, the particular combination of silane coupling agents leads to stable particle dispersions, which is critical for practical applications. Atomic force microscopy and interfacial tension (IFT) measurements are used to monitor the assembly, which is controlled by both the electrostatic interactions between the particles and oil and the interparticle interactions, both of which are modulated by pH. Under acidic conditions, when the surfaces of the oil and the nanoparticles (NPs) are positively charged, the NPs are not attracted at the interface and there is no significant reduction in the IFT. In contrast, under basic conditions in which the oil carries a high negative charge and the amine groups on the silica are deprotonated while still positively charged because of the ammonium groups, the NPs assemble at the interface in a closely packed configuration yielding a jammed state with a high dilatational modulus. As a result, two oil droplets do not coalesce even when pushed against each other and the emulsion stability improves significantly. The study provides new insights into the directed assembly of nanoparticles at fluid interfaces relevant to several applications, including environmental remediation, catalysis, drug delivery, food technology, and oil recovery.

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Section: Introductionmentioning

confidence: 99%

Probing the Interfacial Properties of Oil–Water Interfaces Decorated with Ionizable, pH Responsive Silica Nanoparticles

et al. 2023

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“…Different masses of ODA-MoS 2 were weighed and dispersed in 100 mL of simulated formation water, and then the different concentrations of ODA-MoS 2 nanofluids can be obtained by an ultrasonic cleaning instrument (EYG-3010) for 5 min. It has been demonstrated that the ODA-MoS 2 nanofluid has good stability by high-temperature and salt-resistance experiments, and the specific experimental results can be found in ref .…”

Section: Materials and Methodsmentioning

confidence: 99%

“…The volume of discharged water from the outlet end is the initial oil content of the core ( V oi ), and the volume of irreducible water is expressed as V wi = V – V oi . The core that was saturated with crude oil was aged at 45 °C for 14 days …”

Section: Materials and Methodsmentioning

confidence: 99%

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Study on the Adsorption Laws and Enhanced Oil Recovery of Nanofluid Prepared by Amphiphilic Nanosheets in the Low-Permeability Porous Media

Xiao,

Hou

2023

Ind. Eng. Chem. Res.

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The nanofluid prepared by spherical nanoparticles has a good enhanced oil recovery effect in low-permeability reservoirs. However, a huge adsorption loss has been produced in the process of oil displacement, reducing the oil recovery and increasing the production cost. In this paper, the static adsorption experiments under different influence factors, the dynamic desorption experiment on porous media, and the core flooding experiment are carried out with the nanofluids prepared by self-developed amphiphilic nanosheets (ODA-MoS 2 ). Furthermore, the laws of adsorption kinetics and thermodynamics of the ODA-MoS 2 nanofluid on the porous media surfaces are proposed, and the effect on improving oil recovery is clarified ulteriorly. The results show that the physical adsorption of the system on the surface of oil sand is caused by diffusion (concentration difference), electrostatic interaction, and hydrogen bonding. There is a monolayer adsorption existing on the porous media surface, which is consistent with Langmuir isothermal adsorption model. The salinity and temperature have an inhibitory effect on the adsorption of the ODA-MoS 2 nanofluid; the adsorption capacity increases with the increase in concentration and reaches the equilibrium value of 1.68 mg/g at 75 mg/L. Moreover, the adsorption rate of the ODA-MoS 2 nanofluid is the lowest, only 14.71% compared to that of SiO 2 , whereas the oil recovery increases by 18.59% compared to primary water flooding under the concentration of 75 mg/L. Therefore, the ODA-MoS 2 nanofluid with a lower adsorption capacity is more effective in improving oil recovery in low-permeability reservoirs, and it is expected to be applied on a large scale for oil extraction in low-permeability reservoirs.

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“…Moreover, structural disjoining pressure could be formed by AMH nanosheets at the confinement of the three-phase contact region, which contributes to the dynamic spreading of nanosheets on the solid surface and detachment of oil from the surface. Qu et al 26 found that the spreading rate of the three-phase contact line was in the range from 9.7 × 10 −6 to 2.8 × 10 −5 cm/s under the effect of amphiphilic nanosheets at a ultralow concentration (50 mg/L). Considering that the changes in the contact angle under the effect of MH and NH 2 -MH were insignificant, the adsorption of AMH on the solid surface may be the dominant reason for its superior wettability alteration ability.…”

Section: Characterizations Of Nanosheetsmentioning

confidence: 99%

Amphiphilic Magnesium Hydroxide Nanosheets for Enhanced Oil Recovery

Yang,

Geng,

et al. 2023

ACS Appl. Nano Mater.

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Two-dimensional nanosheets have attracted considerable attention as oil displacement agents due to their unique interfacial properties. However, the high cost limits the extensive application of conventional nanosheets in oilfields. In this study, an amphiphilic magnesium hydroxide (AMH) nanosheet was prepared through the surface modification of low-cost magnesium hydroxide nanosheets under mild conditions. The AMH demonstrates a twodimensional structure with 50−200 nm of plane size and 3.23−4.12 nm of thickness size. Scanning electron microscopy (SEM), atomic force microscopy (AFM), Fourier transform infrared spectrometry (FTIR), and thermogravimetric analysis (TGA) were used to characterize the AMH. Due to the amphiphilic groups on the surface, AMH exhibited favorable interfacial activity and the oil−water interfacial tension (IFT) could be reduced by approximately two-thirds at a very low AMH concentration (100 mg/L). Meanwhile, an elastic film could be formed by the AMH at the oil−water interface. Furthermore, emulsions could be formed by AMH at an ultralow concentration (10 mg/L) and the oil-wet solid surface was transformed into intermediate-wet under the wettability alteration effect of AMH. Due to its amphiphilicity, 17.11% of additional oil could be recovered by AMH in a heterogeneous core with the permeability of 50/250/1000 mD. Considering the favorable ability in enhancing oil recovery and relatively low cost compared to conventional nanosheets, AMH has great potential in large-scale applications in oilfields as an oil displacement agent.

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Amphiphilic Rhamnolipid Molybdenum Disulfide Nanosheets for Oil Recovery

Cited by 39 publications

References 72 publications

Probing the Interfacial Properties of Oil–Water Interfaces Decorated with Ionizable, pH Responsive Silica Nanoparticles

Probing the Interfacial Properties of Oil–Water Interfaces Decorated with Ionizable, pH Responsive Silica Nanoparticles

Study on the Adsorption Laws and Enhanced Oil Recovery of Nanofluid Prepared by Amphiphilic Nanosheets in the Low-Permeability Porous Media

Amphiphilic Magnesium Hydroxide Nanosheets for Enhanced Oil Recovery

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