Book ChapterDOI
Influence of the intensity of mixing on the droplet size distribution of emulsions: Theory and experiment
Bruno Mendiboure,A. Graciaa,Jean Lachaise,G. Marion,Maurice Bourrel,Jean-Louis Salager +5 more
- pp 338-341
TLDR
In this article, the authors used a stochastic model to predict the droplet size distribution of emulsions generated in a mixer, based on the two extreme diameters (dmin, dmax) of the states in which the droplets are classified during the formation of emulsion.Abstract:
We use a stochastic model to predict the droplet size distribution of emulsions generated in a mixer. The emulsions are made of two immiscible liquids, and do not contain surfactants. The intensity of mixing is measured by the speed of rotation of the propeller stirrer. - The model depends on the two extreme diameters (dmin, dmax) of the states in which the droplets are classified during the formation of the emulsion. It predicts a lognormal stationary distribution, the two independent parameters of which can be analytically related to dmin and dmax, by assuming that during the emulsification the breaking/coalescence probabilities of the droplets are time independent and linear functions of the droplet diameter. It can also be related to the speed of rotation of the stirrer by means of the isotropic turbulence theory. — The predicted volume median diameters and standard deviations of the lognormal stationary distributions are in agreement with experiments especially designed to test the model.read more
Citations
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Journal ArticleDOI
Encapsulation of actives for sustained release
Markus Andersson Trojer,Lars Nordstierna,Matias Nordin,Magnus Nydén,Magnus Nydén,Krister Holmberg +5 more
TL;DR: A number of encapsulation methodologies are available including; internal phase separation, interfacial polymerization, formation of multiple emulsions, Layer-by-Layer adsorption of polyelectrolytes and soft templating techniques, all of which are reviewed in this Perspective.
Journal ArticleDOI
Use of microcapsules as controlled release devices for coatings
Markus Andersson Trojer,Lars Nordstierna,Jonatan Bergek,Hans Blanck,Krister Holmberg,Magnus Nydén,Magnus Nydén +6 more
TL;DR: In this review, more than a decade of microcapsule research is summarized, focusing on two coacervation-based encapsulation techniques; the internal phase separation method and the double emulsion method, which together enable the encapsulation of a broad spectrum of biocides with different physicochemical properties.
Journal ArticleDOI
Microencapsulation reactor scale-up by dimensional analysis
TL;DR: Dimensional analysis can be used to predictably scale the current microencapsulation process up to 100 L to produce particles of defined size and Poly(methyl methacrylate) was found to behave similarly to poly(lactic-acid-co-glycolic acid) and could be used as a model polymer for scale-up investigation.
Journal ArticleDOI
Charged microcapsules for controlled release of hydrophobic actives. Part I: encapsulation methodology and interfacial properties
Markus Andersson Trojer,Ye Li,Christoffer Abrahamsson,Azmi Mohamed,Julian Eastoe,Krister Holmberg,Magnus Nydén,Magnus Nydén +7 more
TL;DR: In this paper, the long-term stability of the micro-capsule suspension without excess dispersant, as well as the stability at high ionic strength, have been investigated.
Journal ArticleDOI
Controlled release of microencapsulated 2-n-octyl-4-isothiazolin-3-one from coatings: Effect of microscopic and macroscopic pores
TL;DR: In this article, the microspheres of the biocide 2-n-octyl-4-isothiazolin-3-one (OIT) have been encapsulated by various formulation routes and the release has been studied with regard to different conditions.
References
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Journal ArticleDOI
On the behaviour of liquid dispersions in mixing vessels
TL;DR: In this article, the authors apply the theoretical concepts of local isotropy to explain the behavior of liquid in liquid dispersions, subjected to turbulent agitation, and compare the influence of turbulence on both breakup and coalescence of individual droplets.
Journal ArticleDOI
Drop sizes in an agitated liquid‐liquid system
Youval Mlynek,William Resnick +1 more
TL;DR: In this article, the relationship between drop size and location in an agitated liquid-liquid system was investigated, with a new sampling method in which the dispersion was sampled in a specially designed trap and immediately encapsulated by a polymer film.
Related Papers (5)
Pulsed NMR studies of restricted diffusion. I. Droplet size distributions in emulsions
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