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 439369
Title Atomization of dilute oil-in-water emulsions during application of crop protection products
Author(s) Hilz, E.
Source University. Promotor(en): Martien Cohen Stuart; Frans Leermakers, co-promotor(en): A.W.P. Vermeer. - S.l. : s.n. - ISBN 9789461735416 - 199
Department(s) Physical Chemistry and Colloid Science
VLAG
Publication type Dissertation, internally prepared
Publication year 2013
Keyword(s) drift - spuiten - druppelstudies - verstuiving - druppelgrootte - formuleringen - pesticiden - emulsies - spraying - droplet studies - atomization - droplet size - formulations - pesticides - emulsions
Categories Colloid and Surface Chemistry / Herbicides
Abstract

Crop protection products are usually applied as sprays. These spray droplets have a certain size distribution. Fine droplets are often required to achieve a good coverage of the plant and to guarantee the biological efficacy of an agrochemical product. At the same time very fine droplets in spray are not desirable. Due to their low mass and velocity, these droplets can be carried from the application site by crosswind and e.g. can contaminate surface water. Droplet drift can be minimized by reducing the number of very fine droplets in spray. Dilute emulsions produce coarser sprays compared to water when atomized through a standard flat fan nozzle. For this reason dilute emulsions can reduce drift risk.

The mechanism of spray formation of dilute emulsions has been investigated in this thesis. The proposed mechanism also describes spray formation in more complex mixtures of dilute emulsions with surfactants or polymers.

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