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Matière Molle
(423) Articles dans des revues
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Hydrodynamic instabilities in miscible fluids ![doi link](plugins/aigle//images/ext_link.jpg)
Auteur(s): Truzzolillo D., Cipelletti L.
(Article) Publié:
Journal Of Physics: Condensed Matter, vol. 30 p.033001 (2018)
Texte intégral en Openaccess : ![arxiv](plugins/aigle//images/logo-arxiv.png)
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Asymmetric soft-hard colloidal mixtures: Osmotic effects, glassy states and rheology ![doi link](plugins/aigle//images/ext_link.jpg)
Auteur(s): Merola Maria Consiglia, Parisi Daniele, Truzzolillo D., Vlassopoulos Dimitris, Deepak Vishnu D., Gauthier Mario
(Article) Publié:
Journal Of Rheology / Transactions Of The Society Of Rheology; Society Of Rheology -- Transactions, vol. 62 p.63 - 79 (2018)
Texte intégral en Openaccess : ![openaccess](plugins/aigle//images/logo-openaccess.png)
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Dynamic behaviour of multilamellar vesicles under Poiseuille flow ![doi link](plugins/aigle//images/ext_link.jpg)
Auteur(s): Pommella A., Donnarumma D., Caserta S., Guido S.
(Article) Publié:
Soft Matter, vol. 13 p.6304-6313 (2017)
Texte intégral en Openaccess : ![arxiv](plugins/aigle//images/logo-arxiv.png)
Ref HAL: hal-03344614_v1
DOI: 10.1039/C7SM00867H
Exporter : BibTex | endNote
Résumé: Surfactant solutions exhibit multilamellar surfactant vesicles (MLVs) under flow conditions and in concentration ranges which are found in a large number of industrial applications. MLVs are typically formed from a lamellar phase and play an important role in determining the rheological properties of surfactant solutions. Despite the wide literature on the collective dynamics of flowing MLVs, investigations into the flow behavior of single MLVs are scarce. In this work, we investigate a concentrated aqueous solution of linear alkylbenzene sulfonic acid (HLAS), characterized by MLVs dispersed in an isotropic micellar phase. Rheological tests show that the HLAS solution is a shear-thinning fluid with a power law index dependent on the shear rate. Pressure-driven shear flow of the HLAS solution in glass capillaries is investigated using high-speed video microscopy and image analysis. The so obtained velocity profiles provide evidence for a power-law fluid behaviour of the HLAS solution and images show a flow-focusing effect of the lamellar phase in the central core of the capillary. The flow behavior of individual MLVs shows analogies with that of unilamellar vesicles and emulsion droplets. Deformed MLVs exhibit typical shapes of unilamellar vesicles, such as parachute and bullet-like. Furthermore, MLV velocity follows the classical Hetsroni theory for droplets provided that the power law shear dependent viscosity of the HLAS solution is taken into account. The results of this work are relevant for the processing of surfactant-based systems in which the final properties depend on the flow-induced morphology, such as cosmetic formulations and food products.
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Structure, interfacial film properties, and thermal fluctuations of microemulsions as seen by scattering experiments ![doi link](plugins/aigle//images/ext_link.jpg)
Auteur(s): Oberdisse J., Hellweg Thomas
(Article) Publié:
Advances In Colloid And Interface Science, vol. 247 p.354-362 (2017)
Texte intégral en Openaccess : ![openaccess](plugins/aigle//images/logo-openaccess.png)
Ref HAL: hal-03013763_v1
DOI: 10.1016/j.cis.2017.07.011
Exporter : BibTex | endNote
Résumé: The physics of microemulsions and in particular Dominique Langevin's contributions to the understanding of microemulsion structure and bending properties using scattering techniques are reviewed. Among the many methods used by her and her co-workers, we particularly emphasize optical techniques and small angle neutron scattering, but also neutron spin echo spec-troscopy. The review is then extended to more recent studies of properties of microemulsions close to surfaces, using reflectometry and grazing-incidence small angle neutron scattering (GISANS).
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Mucus as an Arrested Phase Separation Gel ![doi link](plugins/aigle//images/ext_link.jpg)
Auteur(s): Philippe A. M., Cipelletti L. , Larobina Domenico
(Article) Publié:
Macromolecules, vol. 50 p.8221-8230 (2017)
Ref HAL: hal-01934572_v1
DOI: 10.1021/acs.macromol.7b00842
WoS: 000413885100043
Exporter : BibTex | endNote
7 Citations
Résumé: We investigate the spontaneous restructuring andaging behavior of pig gastric mucus gels by combining rheology andnonconventional static and dynamic light scattering. We find that themucus elasticity weakens over time, concomitantly to structuralevolution toward a locally more compact configuration and the onsetof large scale density fluctuations. We interpret this behavior asstemming from an arrested phase separation, as observed in manygel-forming polymer systems. This scenario is confirmed by spaceandtime-resolved dynamic light scattering data, showing that the gelrestructuring is due to intermittent bursts of spatially correlatedrearrangements, leading to ballistic dynamics.
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Customised bifurcating networks for mapping polymer dynamics in shear flows ![doi link](plugins/aigle//images/ext_link.jpg)
Auteur(s): Fidalgo Joana, Zografos Konstantinos, Casanellas Vilageliu L., Lindner Anke, Oliveira Mónica
(Article) Publié:
Biomicrofluidics, vol. 11 p. (2017)
Texte intégral en Openaccess : ![openaccess](plugins/aigle//images/logo-openaccess.png)
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Formulation flottante de biopesticide pour une démoustication efficace et durable ![hal link](plugins/aigle//images/ext_link.jpg)
Auteur(s): Massiera G.
(Article) Publié:
Les Cahiers De La Recherche Santé, Environnement, Travail, vol. p.16-17 (2017)
Texte intégral en Openaccess :
Ref HAL: anses-01798647_v1
Exporter : BibTex | endNote
Résumé: L’observation de résistances chez certaines espèces de moustiques aux pesticides synthétiques les plus couramment utilisés a conduit à l’utilisation et au développement d’alternatives efficaces aux insecticides chimiques. Ainsi, l’insecticide d’origine bactérienne Bacillus thuringiensis israelensis (Bti) est devenu pratiquement la seule substance active autorisée pour le traitement des gîtes larvaires de moustiques en milieu naturel en France métropolitaine. Si le Bti est un biolarvicide intéressant, son efficacité dépend de sa présence et de sa rémanence à la surface de l’eau, c’est‐à‐dire là où les larves de moustiques se nourrissent, exclusivement pour certaines espèces anophèles. Le projet de recherche "MicroBti" consiste à étudier deux stratégies de formulation qui permettraient de prolonger la présence de Bti à la surface de l’eau au-delà de quelques jours (à l’exception des eaux usées), pour le traitement des gîtes larvaires.
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