[Mise au point de fluides intelligents pour le contrôle de l'application de solutions vaporisées]
Les récents progrès concernant la compréhension des « fluides complexes » ont permis le développement de nouveaux additifs chimiques utilisés dans l'industrie phyto-sanitaire qui ont abouti à des produits plus efficaces et à un haut niveau de protection environnementale et publique. Nous présentons ici un exemple concernant l'amélioration de l'application des herbicides et des pesticides durant leur vaporisation sur des plantes. En choisissant judicieusement des solutions diluées de polymères, il est possible d'améliorer simultanément les caractéristiques du jet, la déposition des gouttes, et la rétention du produit sur la surface de la plante cible. L'optimisation de ces paramètres demande de trouver un équilibre entre l'hydrodynamique et les interactions moléculaires qui contrôlent le comportement des solutions vaporisées.
Recent advances in our understanding of ‘complex fluids’ have lead to the development of new chemical additives in the agricultural industry, which provide more efficient products and a higher level of public and environmental protection. Here we present one example that deals with the improved application of herbicides and pesticides during the spray treatment of plants. Using judiciously chosen dilute polymer solutions, one can simultaneously improve the spray characteristics, droplet deposition, and product retention onto the targeted plant surface. Achieving these combined benefits, requires a delicate balance between fluid hydrodynamics and the molecular interactions that control the phase behaviour of the sprayed solutions.
Mots-clés : Viscosité élongationelle, Rebond de gouttes, Herbicides, Pesticides
Vance Bergeron 1
@article{CRPHYS_2003__4_2_211_0,
author = {Vance Bergeron},
title = {Designing intelligent fluids for controlling spray applications},
journal = {Comptes Rendus. Physique},
pages = {211--219},
publisher = {Elsevier},
volume = {4},
number = {2},
year = {2003},
doi = {10.1016/S1631-0705(03)00043-4},
language = {en},
}
Vance Bergeron. Designing intelligent fluids for controlling spray applications. Comptes Rendus. Physique, Volume 4 (2003) no. 2, pp. 211-219. doi : 10.1016/S1631-0705(03)00043-4. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/S1631-0705(03)00043-4/
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