Accueil >
Production scientifique
(144) Production(s) de IN M.
|
|
Solutions of surfactant oligomers: a model system for tuning foam stability by the surfactant structure 
Auteur(s): Salonen A., In M., Emile J., Saint-Jalmes A.
(Article) Publié:
Soft Matter, vol. 6 p.2271-2281 (2010)
Texte intégral en Openaccess : 
Ref HAL: hal-00520048_v1
DOI: 10.1039/b924410g
WoS: 000277564300021
Exporter : BibTex | endNote
25 Citations
Résumé: We report experiments on aqueous foams made of solutions of oligomers of cationic surfactants. The degree of oligomerization is varied up to 4, and two spacer lengths are used. We have studied both the interfacial dilational and shear rheology, the single thin film properties, the foamability of the solutions, as well as the aging and the mechanical properties of the 3D foams. We have found clear differences between the oligomeric systems at all length scales. We then discuss the correlations between the properties at the different length scales and see how the macroscopic features depend on the molecular structure. This work first allows us to determine the relevance of each measurement; in that respect, it stresses the important role of the timescales, and the need to monitor the liquid fraction and bubble size in order to perform correct comparisons. Secondly, this work provides information on how one could optimize foaming properties with oligomers, and the balance between the degree of oligomerization and spacer length.
|
|
|
|
Growth and Branching of Charged Wormlike Micelles as Revealed by Dilution Laws
Auteur(s): In M., Bendjeriou Baroudi, Noirez Laurence, Grillo Isabelle
(Article) Publié:
Langmuir, vol. 26 p.10411-10414 (2010)
Ref HAL: hal-00520033_v1
PMID 20527956
DOI: 10.1021/la101199u
WoS: 000279239900004
Exporter : BibTex | endNote
22 Citations
Résumé: The successive transitions of morphology in aqueous solutions of interacting micelles are directly evidenced by the position q* of the correlation peak of the small angle neutron scattering profiles. As the volume fraction Phi increases, q* successively fits to the dilution laws expected for spheres and cylinders, and eventually gets close to the one expected for sheets when the micelles get branched. Data in between the swelling laws are quantitatively analyzed in terms of aggregation number and junction density. Varying the temperature in the dilute regime yields the end-cap energy which varies with molecular structure and scales as Phi(-1/2). In the semidilute regime, the junction density scales as nu(j) similar to Phi(1.8), close but slightly faster than theoretically expected. The boosting effect of intermicellar repulsion on growth and branching is pointed out by the present results which directly show that both condensation processes keep the micelles further apart.
|
 |
Rotational and translational diffusion of colloidal particles on a fluid interface
Auteur(s): Ben-m'barek Nadia, Fedorenko D., Blanc C., Abkarian M., In M., Nobili M.
(Affiches/Poster)
International Soft Matter Conference 2010 (Granada, ES), 2010-07-03 |
|
|
|
Polymorphisme micellaire des solutions de tensioactifs gemini
Auteur(s): In M.
Conference: Rencontres Rossat-Mignot de la Société Française de Neutronique (La Grande Motte, FR, 2009-05-23)
Résumé: Résumé (à complèter)
|
|
|
|
Concentration of endcaps and junctions in charged wormlike micelles.
Auteur(s): In M.
Conference: JCNS Workshop 2009 Trends and perspectives in neutrons scattering on softmatter (Tutzing, DE, 2009-10-05)
Résumé: Résumé (à complèter)
|
|
Phase behavior of double-hydrophilic diblock copolymer mixed with oppositely charged surfactants
Auteur(s): In M.
Conférence invité: Engineering Conference International, Association in solution (Tomar, PT, 2009-07-26)
|
