Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 477072
Title Influence of the emulsion formulation in premix emulsification using packed beds
Author(s) Nazir, A.; Boom, R.M.; Schroën, C.G.P.H.
Source Chemical Engineering Science 116 (2014). - ISSN 0009-2509 - p. 547 - 557.
DOI https://doi.org/10.1016/j.ces.2014.05.009
Department(s) Food Process Engineering
VLAG
Publication type Refereed Article in a scientific journal
Publication year 2014
Keyword(s) in-water emulsions - droplet break-up - membrane emulsification - multiple emulsions - microchannel emulsification - interfacial-tension - drug-delivery - static mixers - homogenization - surfactant
Abstract Premix emulsification was investigated using packed beds consisting of micron-sized glassbeads, a system that avoids fouling issues, unlike traditional premix membrane emulsification. The effects of emulsion formulation were investigated, most notably the viscosity and the surfactant. The dropletsize was reduced by increased shea rstress in the emulsion. This was stronger at low viscosity ratios than at high ratios. As expected the flux was proportional to the overall emulsion viscosity, and emulsions with small droplet size (Sauter mean droplet diameter o5 µm) could still be produced at up to 60% of dispersed phase provided that sufficient surfactant was available. More uniform emulsions(spanE0.75) were produced withTween-20(nonionic )and SDS(anionic) as surfactants than with CTAB (acationic surfactant), possibly due to acombination of a low equilibrium interfacia ltension and electrostatic attractions with the glass surface. Scaling relations were proposed taking into account all investigated product properties that can describe the dropletsize successfully.
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