Stability of thin liquid films containing polydisperse particles

Sethumadhavan, Gopi; Bindal, Sunil K.; Nikolov, Alex; Wasan, Darsh T.

doi:10.1016/s0927-7757(01)01123-2

Cited by 34 publications

(25 citation statements)

References 15 publications

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“…,29] and polystyrene [30] nanoparticles. However, there is evidence that it can also occur with surfactant micelles [31] acting as particles, asphaltene resin particles [32] protein vesicles [33] and even globular proteins [34 !! ] and casein sub-micelles [35], though the evidence for the proteins is not quite so clear.…”

Section: Additional Stability Due To Particlesmentioning

confidence: 99%

“…and casein sub-micelles [35], though the evidence for the proteins is not quite so clear. Perhaps part of the reason for this lack of clarity is that it has also been shown [36] that a very slight amount of polydispersity in particle size can disrupt the in-film packing so significantly that films thin much more rapidly and indeed coalesce quite readily. The proteins may aggregate to different extents and so introduce this level of polydispersity.…”

Section: Additional Stability Due To Particlesmentioning

confidence: 99%

See 1 more Smart Citation

Foam stability: proteins and nanoparticles

Murray

Ettelaie

2004

Current Opinion in Colloid & Interface Science

326

197

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Section: Additional Stability Due To Particlesmentioning

confidence: 99%

Section: Additional Stability Due To Particlesmentioning

confidence: 99%

Foam stability: proteins and nanoparticles

Murray

Ettelaie

2004

Current Opinion in Colloid & Interface Science

326

197

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“…Assuming scale invariance (the phase ratio f GS being independent from length scale) and the mean thickness of the struts t B being independent from the nuclei density and the cell diameter e.g., t B ¼ const, stabilized evolution of cell size is approximated by [31] …”

Section: Hierarchial Foam (First and Second Generation)mentioning

confidence: 99%

“…Thus, for t crit B of 0.1 mm and 1 mm minimum cell sizes of $0.86 and 8.65 mm, respectively, are derived for a fractional density of r B Ã % 0.31 e.g., a porosity of 0.69 of the hierarchical foam. Stabilization of the cellular structure at low fractional density and hence small strut thickness may arise from particle layering (stratification) of the nano-scale filler (Al 2 O 3 ) which can cause film thinning [31] e.g., reduction of t crit B . [32] Conclusions While the matrix foam skeleton provides control of macroscopic shape as well as density distribution in a component single-or multistep foam infiltration may offer a high potential for improving the properties of hierarchical cellular materials.…”

Section: Structure Optimizationmentioning

confidence: 99%

Processing of Ceramic Foams with Hierarchical Cell Structure

2010

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Silicon carbide‐based cellular ceramics characterized by a hierarchical pore structure were processed. An open‐cellular PU foam template with a mean cell density of 10 pores per inch (ppi), equivalent to a cell diameter of 4 mm and a strut thickness of 250 µm, was coated with a primary SiC slurry. Cross‐linking of a polysiloxane binder at 190 h resulted in a SiC filled reticulated thermoset foam (first generation). Subsequently, this matrix foam was infiltrated with a second slurry of slightly different polysiloxane composition which upon heating to 290 °C caused bubble nucleation and formation of a second generation foam filling the cell space in the matrix foam skeleton. After pyrolysis at 1000 °C a SiC/SiOC reaction bonded composite foam with a hierarchical cell structure and a fractional density of 0.31 was obtained. SEM and X‐ray µ‐CT analyses confirm both generations of matrix as well as infiltrated foam to be open cellular but with a pronounced difference in cell size (matrix foam cell size 2.5 mm versus infiltrated foam cell size 0.29 mm). While the matrix foam skeleton provides control of macroscopic shape as well as density distribution in the component, single‐ or multistep foam infiltration may offer a high potential for improving the mechanical properties of hierarchical cellular materials. Thus, hierarchical structure formation offers a high potential to fabricate low density cellular ceramics which might be of interest for lightweight design of novel engineering materials.

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“…The stepwise-thinning in particle-stabilized thin liquid films has been studied experimentally [3,6,7,14,15,16] and theoretically [3,8,17,18,19,20]. Most of the analyses of the mechanism of stepwise thinning focused on the role of normal structural force produced by the suspended particles [3,8,14,18,19,20].…”

Section: Introductionmentioning

confidence: 99%

Equilibrium and nonequilibrium thermodynamics of particle-stabilized thin liquid films

Bławzdziewicz

Wajnryb²

2008

The Journal of Chemical Physics

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Our recent quasi-two-dimensional thermodynamic description of thin-liquid films stabilized by colloidal particles is generalized to describe nonuniform equilibrium states of films in external potentials and nonequilibrium transport processes produced in the film by gradients of thermodynamic forces. Using a Monte-Carlo simulation method, we have determined equilibrium equations of state for a film stabilized by a suspension of hard spheres. Employing a multipolar-expansion method combined with a flow-reflection technique, we have also evaluated the short-time film-viscosity coefficients and collective particle mobility.

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Stability of thin liquid films containing polydisperse particles

Cited by 34 publications

References 15 publications

Foam stability: proteins and nanoparticles

Foam stability: proteins and nanoparticles

Processing of Ceramic Foams with Hierarchical Cell Structure

Equilibrium and nonequilibrium thermodynamics of particle-stabilized thin liquid films

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