Surface Tension of Charge-Stabilized Colloidal Suspensions at the Water−Air Interface

Dong, Lichun; Johnson, Dylan

doi:10.1021/la035128j

Cited by 85 publications

(72 citation statements)

References 15 publications

(15 reference statements)

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“…Therefore, part of the observed preferential accumulation of colloids is likely due to attraction of non-DLVO origin between the colloids and AWI. Although it has been suggested that capillary forces between particles at AWI can be neglected for particles with radii smaller than 3 µm [77,78], the possibility that the capillary phenomena contribute to particle attachment to AWI cannot be ruled out [14,32,[79][80][81][82]. Non-DLVO attachment of bacteria to AWI was observed by Schäfer et al [74] who reported that while accumulation of some strains of bacteria on AWI increased with increasing ionic strength, other strains did not show any dependence on ionic strength, or even exhibited the opposite tendency.…”

Section: Electrostatic Interactionsmentioning

confidence: 99%

Interfacial interactions and colloid retention under steady flows in a capillary channel

Lazouskaya

Jin

2006

Journal of Colloid and Interface Science

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Section: Electrostatic Interactionsmentioning

confidence: 99%

Interfacial interactions and colloid retention under steady flows in a capillary channel

Lazouskaya

Jin

2006

Journal of Colloid and Interface Science

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“…However, there is a long ongoing debate on whether or not nanoparticles (NPs) adsorbed at an interface can reduce the interfacial tension. [1][2][3][4][5][6][7][8][9][10][11] Briefly,…”

Section: Introductionmentioning

confidence: 99%

“…1 Glaser et al found that Au-Fe 3 O 4 Janus nanoparticles can more significantly reduce the interfacial tension than homogeneous ones at similar concentrations. 10 Okubo investigated the water-air interfacial tension in the presence of polystyrene and silica particles.…”

Section: Introductionmentioning

confidence: 99%

Nanoparticle effects on the water-oil interfacial tension

2012

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Although it is well known that solid particles adsorb at interfaces, no consensus has been reached on whether or not the adsorbed nanoparticles affect interfacial tension. In this work the Wilhelmy plate method is implemented in mesoscale dissipative particle dynamics (DPD) simulations to study the influence of nanoparticles on the water-oil interfacial tension. The results are compared with predictions that neglect nanoparticlenanoparticle interactions at the interface. We find that the two estimates can differ significantly. In the regime where nanoparticle-nanoparticle repulsion is large, the Wilhelmy plate method suggests interfacial tension reduction, which appears to be a strong function of nanoparticle surface coverage. Some experimental data from the literature, in apparent disagreement, are re-interpreted based on this insight.

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“…The increase of the concentration of the nonionic surfactant increases the migration of SiO 2 NPs towards the interface indicating that capillary force phenomenon is the causative factor of this increase in IFT (Dong and Johnson 2003). The location of the SiO 2 NPs at an interface causes a lateral manifestation of the capillary forces.…”

Section: Effects Of Sio 2 Nanoparticles On Nonionic Surfactant Propermentioning

confidence: 98%

“…The adsorption of the SiO 2 NPs also modifies the entropy of these systems. As the SiO 2 NPs are transported to the interface, this movement will generate more space for the aqueous molecules and, consequently, the entropy of the brine-surfactant-SiO 2 nanofluid-oil system changes and undergoes an expansion (Dong and Johnson 2003). These phenomena serve as the catalyst for a decrease in the total free energy of the brine-surfactant-SiO 2 nanofluid-oil system (Defay and Prigoin 1966), which therefore induces the IFT of this system to decrease.…”

Section: Effects Of Sio 2 Nanoparticles On Nonionic Surfactant Propermentioning

confidence: 99%

Effects of silica-based nanostructures with raspberry-like morphology and surfactant on the interfacial behavior of light, medium, and heavy crude oils at oil-aqueous interfaces

Bai

Korte

et al. 2017

Appl Nanosci

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Any efficient exploitation of new petroleum reservoirs necessitates developing methods to mobilize the crude oils from such reservoirs. Here silicon dioxide nanoparticles (SiO 2 NPs) were used to improve the efficiency of the chemical-enhanced oil recovery process that uses surfactant flooding. Specifically, SiO 2 NPs (i.e., 0, 0.001, 0.005, 0.01, 0.05, and 0.1 wt%) and Tween Ò 20, a nonionic surfactant, at 0, 0.5, and 2 critical micelle concentration (CMC) were varied to determine their effect on the stability of nanofluids and the interfacial tension (IFT) at the oil-aqueous interface for 5 wt% brine-surfactantSiO 2 nanofluid-oil systems for West Texas Intermediate light crude oil, Prudhoe Bay medium crude oil, and Lloydminster heavy crude oil. Our study demonstrates that SiO 2 NPs may either decrease, increase the IFT of the brinesurfactant-oil systems, or exhibit no effects at all. For the brine-surfactant-oil systems, the constituents of the oil and aqueous substances affected the IFT behavior, with the nanoparticles causing a contrast in IFT trends according to the type of crude oil. For the light oil system (0.5 and 2 CMC Tween threshold concentration resulted in a decrease in IFT, and concentrations above this threshold resulted in an increase in IFT. The IFT decreased until the NP concentration reached a threshold concentration where synergetic effects between nonionic surfactants and SiO 2 NPs are the opposite and result in antagonistic effects. Adsorption of both SiO 2 NPs and surfactants at an interface caused a synergistic effect and an increased reduction in IFT. The effectiveness of the brine-surfactant-SiO 2 nanofluids in decreasing the IFT between the oil-aqueous phase for the three tested crude oils were ranked as follows: (1) Prudhoe Bay [ (2) Lloydminster [ and (3) West Texas Intermediate. The level of asphaltenes and resins in these crude oil samples reflected these rankings. A decrease in the IFT also indicated the potential of the SiO 2 NPs to decrease capillary pressure and induce the movement and recovery of oil in original water-wet reservoirs. Conversely, an increase in IFT indicated the potential of SiO 2 NPs to increase capillary pressure and oil recovery in reservoirs subject to wettability reversal under water-wet conditions. Raspberrylike morphology particles were discovered in 5 wt% brinesurfactant-SiO 2 nanofluid-oil systems. The development of raspberry-like particles material with high surface area, high salt stability, and high capability of interfaces alteration and therefore wettability changes offers a wide range of applications in the fields of applied nanoscience, environmental engineering, and petroleum engineering.

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Surface Tension of Charge-Stabilized Colloidal Suspensions at the Water−Air Interface

Cited by 85 publications

References 15 publications

Interfacial interactions and colloid retention under steady flows in a capillary channel

Interfacial interactions and colloid retention under steady flows in a capillary channel

Nanoparticle effects on the water-oil interfacial tension

Effects of silica-based nanostructures with raspberry-like morphology and surfactant on the interfacial behavior of light, medium, and heavy crude oils at oil-aqueous interfaces

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