On the colloidal stability of water-in-oil emulsions a self-consistent field approach

Leermakers, F.A.M.; Sdranis, Y.S.; Lyklema, J.; Groot, Robert D.

doi:10.1016/0927-7757(93)02686-9

Cited by 18 publications

(12 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Small water droplets in mineral oil ( n -alkanes) lead more easily to dispersed systems whereas larger droplets in vegetable (fatty triglycerides), silicone, and some functionalized oils lead to gels made of strongly aggregated droplets. These observations are in agreement with the previously reported adhesion between large droplets revealed by the existence of contact angles in the same conditions . These gels are also very similar to those previously observed in direct emulsions stabilized with anionic surfactant in the presence of electrolytes .…”

Section: Introductionsupporting

confidence: 93%

Aggregation Phenomena in Water-in-Oil Emulsions

et al. 1996

View full text Add to dashboard Cite

We report the phase behavior of monodisperse water-in-oil emulsion droplets. We show that depending upon the droplet size, the surfactant concentration within the continuous oil phase, the chemical nature of the oil, and the temperature, the emulsion droplets may remain dispersed or reversibly aggregated. Close to the phase transition threshold, we observe coexisting phases, whereas much above, we preferentially observe gels. Since such phase transitions exhibit the same trends than what was previously observed in direct oil-in-water emulsions, a size purification process based on the same principles is accessible in the coexisting regime. We present phase diagrams for two different droplet sizes that describe the main qualitative features of these systems.

show abstract

Section: Introductionsupporting

confidence: 93%

Aggregation Phenomena in Water-in-Oil Emulsions

et al. 1996

View full text Add to dashboard Cite

show abstract

“…Most relevant to our printed systemwhere droplets are placed in specific arrangements-are studies by Princen et al on how the value of the contact angle between pairs of adhesive oil-in-water droplets controls droplet packing in small 2D and 3D assemblies [18][19][20] . Based on Princen's observations and early work on adhesive water-in-oil emulsions 21,22 , we hypothesised that the value of θ DIB between pairs of droplets would be a major geometrical constraint on the packing of hundreds of deformable aqueous droplets interfaced by lipid bilayers (see Supplementary Note 3 for discussion on geometrical constraints in droplet networks). For DIBs, θ DIB reflects the balance of the surface tensions between the lipid monolayers and the lipid bilayer (see Supplementary Note 1 for discussion on the thermodynamics of DIB formation) 23,24 .…”

mentioning

confidence: 99%

Controlled packing and single-droplet resolution of 3D-printed functional synthetic tissues

et al. 2020

View full text Add to dashboard Cite

3D-printing networks of droplets connected by interface bilayers are a powerful platform to build synthetic tissues in which functionality relies on precisely ordered structures. However, the structural precision and consistency in assembling these structures is currently limited, which restricts intricate designs and the complexity of functions performed by synthetic tissues. Here, we report that the equilibrium contact angle (θ DIB) between a pair of droplets is a key parameter that dictates the tessellation and precise positioning of hundreds of picolitresized droplets within 3D-printed, multi-layer networks. When θ DIB approximates the geometrically-derived critical angle (θ c) of 35.3°, the resulting networks of droplets arrange in regular hexagonal close-packed (hcp) lattices with the least fraction of defects. With this improved control over droplet packing, we can 3D-print functional synthetic tissues with single-droplet-wide conductive pathways. Our new insights into 3D droplet packing permit the fabrication of complex synthetic tissues, where precisely positioned compartments perform coordinated tasks.

show abstract

“…This approach is valuable in studies of bilayers. Another popular lattice-based approach is that of Scheutjens, Fleer, Leermakers et al [20][21][22]. Off-lattice, Gaussian string SCFT methods for lipids have been developed by Lee, Mezzenga and Fredrickson on the one hand [23,24], and Schick, Müller, Katsov and Lee on the other [25][26][27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

“…[17][18][19] This approach is valuable in studies of bilayers. Another popular lattice-based approach is that of Scheutjens, Fleer, Leermakers et al [20][21][22] Off-lattice, Gaussian string SCFT methods for lipids have been developed by Lee, Mezzenga and Fredrickson on the one hand, 23,24 and Schick, M€ uller, Katsov and Lee on the other. [25][26][27][28][29][30][31][32] These methods use a coarse-graining philosophy wherein the behaviour of lipid selfassembly is understood in terms of a generic amphiphilic molecule, specifically, a block copolymer.…”

Section: Introductionmentioning

confidence: 99%

Benchmarking a self-consistent field theory for small amphiphilic molecules

2012

View full text Add to dashboard Cite

A minimalist self-consistent field theory for small amphiphilic molecules is presented. The equations for this model are less involved than those for block copolymers and are easily implemented computationally. A new convergence technique based on a variant of Anderson mixing is also presented which allows the equations to be solved more rapidly than block copolymer self-consistent field theory. The computational speed up and simplicity of equations result from a lack of configurational degrees of freedom in the amphiphilic molecular model. The omission of polymeric flexibility leads to qualitatively different predictions compared to known diblock copolymer behaviour. * Electronic address: thompson@uwaterloo.ca † Present address:

show abstract

On the colloidal stability of water-in-oil emulsions a self-consistent field approach

Cited by 18 publications

References 28 publications

Aggregation Phenomena in Water-in-Oil Emulsions

Aggregation Phenomena in Water-in-Oil Emulsions

Controlled packing and single-droplet resolution of 3D-printed functional synthetic tissues

Benchmarking a self-consistent field theory for small amphiphilic molecules

Contact Info

Product

Resources

About