Stability of Liquid Films Containing Monodisperse Colloidal Particles

Sethumadhavan, Gopi; Nikolov, Alex

doi:10.1006/jcis.2001.7628

Cited by 112 publications

(99 citation statements)

References 24 publications

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“…However, it does appear that the expansion factor increases with increased undissolved solids. This trend has been demonstrated in various other systems 25,26 . In all cases, small doses of Q2 were able to reduce the expansion and foaminess (sustainability) of the foam.…”

Section: Antifoam Use and Demandsupporting

confidence: 65%

Foam Formation in the Saltstone Production Facility: Evaluation of Sources and Mitigation

Cozzi¹

2011

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Section: Antifoam Use and Demandsupporting

confidence: 65%

Foam Formation in the Saltstone Production Facility: Evaluation of Sources and Mitigation

Cozzi¹

2011

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“…A result of such a structure force is that nanofluids could exhibit a good spreading capability in confined spaces. Such forces have been observed (i) to be able to change the macroscopic contact angle of a liquid droplet [64][65][66] , (ii) to stabilise liquid films 67 , and (iii) to lift an oil droplet from a wall in an aqueous solution 36,[68][69][70][71][72] As shown by 36 , the SDP could be important for mobilising individual oil droplets. However as suggested earlier, the droplet form of oil was unlikely in the current experiments.…”

Section: The Structural Disjoining Pressure Effectmentioning

confidence: 99%

Nanoparticle-Assisted Water-Flooding in Berea Sandstones

Azmi

Raza

et al. 2016

Energy Fuels

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ABSRACT:The use of nanoparticles (NP) to improve reservoir characterisation or to enhance oil recovery (EOR) has recently received intensive interest; however there are still many un-resolved questions. This work reports a systematic study of the effect of rutile TiO 2 nanoparticle-assisted brine flooding. Rutile ellipsoid TiO 2 nanoparticles were synthesised and stabilised by tri-sodium citrate dehydrate for brine flooding of water-wet Berea sandstone cores. Careful characterisation of the rock samples and nanomaterials before and after the flooding was conducted, and the relative contributions to the modified flooding results from the stabiliser and the nanoparticles of different concentrations were examined. The oil recovery performance was evaluated both at break-through (BT) point and at the end of flooding (~3.2 pore volumes). Nanoparticle migration behavior was also investigated in order to understand the potential mechanisms for oil recovery. The results showed that both nanoparticle transport rate and EOR effect were strongly dependent on the particle concentration. The oil recovery efficiency at the BT point was found to increase at low nanoparticle concentrations but decrease at higher values. A maximum 33% increase of the recovery factor was observed at the BT point for a TiO 2 concentration of 20 ppm, but higher nanoparticle concentrations usually had higher ultimate recovery factors. The presence of oil phase was found to accelerate the particle migration though the core. The discussion of various mechanisms suggested that the improvement in the mobility ratio, possible wettability change and log-jamming effect were responsible for the observed phenomena.

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“…In experiments with horizontal films [1, 2], such transitions occur by rapid formation of circular regions of a smaller thickness, followed by a much slower expansion. In investigations of vertical films, up to seven coexisting parallel stripes of different thickness have been observed [3].Film stratification has recently been intensively studied [1][2][3][4][5][6][7][8] because of the relevance of the problem for understanding structural colloidal forces. In particle-stabilized thin liquid films, the structural forces depend on the film thickness in an oscillatory manner due to particle layering [9].…”

mentioning

confidence: 99%

“…Such a stratification phenomenon is particularly interesting in films stabilized by colloidal particles, micelles, or polyelectrolytes, where the thinning occurs through a series of stepwise transitions between film states characterized by the thickness commensurate with the size of the stabilizing particles. In experiments with horizontal films [1,2], such transitions occur by rapid formation of circular regions of a smaller thickness, followed by a much slower expansion. In investigations of vertical films, up to seven coexisting parallel stripes of different thickness have been observed [3].…”

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confidence: 99%

Phase equilibria in stratified thin liquid films stabilized by colloidal particles

Bławzdziewicz

Wajnryb

2005

Europhys. Lett.

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Abstract. -Phase equilibria between regions of different thickness in thin liquid films stabilized by colloidal particles are investigated using a quasi-two-dimensional thermodynamic formalism. Appropriate equilibrium conditions for the film tension, normal pressure, and chemical potential of the particles in the film are formulated, and it is shown that the relaxation of these parameters occurs consecutively on three distinct time scales. Film stratification is described quantitatively for a hard-sphere suspension using a Monte-Carlo method to evaluate thermodynamic equations of state. Coexisting phases are determined for systems in constrained-and full-equilibrium states that correspond to different stages of film relaxation.Drainage of thin liquid films often involves spontaneous formation of coexisting regions of different, but uniform, thickness. For example, circular black-film spots can be seen in soap bubbles prior to breakup. Such a stratification phenomenon is particularly interesting in films stabilized by colloidal particles, micelles, or polyelectrolytes, where the thinning occurs through a series of stepwise transitions between film states characterized by the thickness commensurate with the size of the stabilizing particles. In experiments with horizontal films [1, 2], such transitions occur by rapid formation of circular regions of a smaller thickness, followed by a much slower expansion. In investigations of vertical films, up to seven coexisting parallel stripes of different thickness have been observed [3].Film stratification has recently been intensively studied [1][2][3][4][5][6][7][8] because of the relevance of the problem for understanding structural colloidal forces. In particle-stabilized thin liquid films, the structural forces depend on the film thickness in an oscillatory manner due to particle layering [9]. Equilibrium values of the film thickness result from the balance between the normal pressure in the film (which includes the oscillatory structural force) and the outside pressure [6,7,10]. We find, however, that the normal-stress balance used alone in descriptions of the film stratification phenomenon is insufficient-the mechanical equilibrium between regions (phases) of different thickness requires also the lateral force balance. Since the lateral balance has not been included in the available theories, understanding of an essential aspect of c EDP Sciences

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Stability of Liquid Films Containing Monodisperse Colloidal Particles

Cited by 112 publications

References 24 publications

Foam Formation in the Saltstone Production Facility: Evaluation of Sources and Mitigation

Foam Formation in the Saltstone Production Facility: Evaluation of Sources and Mitigation

Nanoparticle-Assisted Water-Flooding in Berea Sandstones

Phase equilibria in stratified thin liquid films stabilized by colloidal particles

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