Show simple item record

dc.contributor.author
 hal.structure.identifier
SHIBAEV, Andrey V.
302918 Lomonosov Moscow State University [MSU]
dc.contributor.author
 hal.structure.identifier
MAKAROV, Anton V.
302918 Lomonosov Moscow State University [MSU]
dc.contributor.authorKUKLIN, Alexander I.
dc.contributor.author
 hal.structure.identifier
LIOPOULOS, Ilias
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
dc.contributor.author
 hal.structure.identifier
PHILIPPOVA, Olga E.
302918 Lomonosov Moscow State University [MSU]
dc.date.accessioned2018
dc.date.available2018
dc.date.issued2018
dc.date.submitted2018
dc.identifier.issn0024-9297
dc.identifier.urihttp://hdl.handle.net/10985/13296
dc.description.abstractThe paper describes phase behavior, microstructure, and rheological properties of the mixtures of surfactant micelles of varying negative charge with nonionic hydrophilic polymer poly(vinyl alcohol) (PVA) weakly interacting with the micelles. To reduce the charge of micelles, a cationic surfactant n-octyltrimethylammonium bromide was gradually added to the anionic surfactant potassium oleate. No appreciable interactions between the micelles and polymer were revealed by NMR spectroscopy. At the same time, the system shows a broad range of compatibility, which may be due to surfactant counterions preventing the demixing. The higher the concentration of added polymer, the higher the charge density of micelles necessary to prevent macrophase separation. However, SANS data demonstrate that upon the addition of polymer the intermicellar distances decrease, which suggests that the micelles are expelled from some area filled by PVA macromolecules, indicating a local demixing. A decrease of micellar charge density induces the growth of micelles from short nonoverlapping cylinders to long entangled wormlike chains both in the presence and in the absence of polymer, which is accompanied by an increase of viscosity by up to 5 orders of magnitude. Despite very weak interactions with the micelles, PVA makes their growth in length much more pronounced and forms the entanglements with micellar chains, thereby enhancing significantly the viscoelastic properties. The effect of polymer on micellar length was attributed to polymer-surfactant microsegregation increasing the local surfactant concentration and consequently the length of micelles. These data demonstrate the effectiveness of the addition of weakly interacting polymer for the modulation of rheology of wormlike surfactant micelles, thus opening a new way for manipulating the rheological properties of viscoelastic surfactants.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.rightsPost-print
dc.titleRole of Charge of Micellar Worms in Modulating Structure and Rheological Properties of Their Mixtures with Nonionic Polymer
dc.identifier.doi10.1021/acs.macromol.7b02246
dc.typdocArticle dans une revue avec comité de lecture
dc.localisationCentre de Paris
dc.subject.halSciences de l'ingénieur: Matériaux
dc.subject.halSciences de l'ingénieur: Mécanique
ensam.audienceInternationale
ensam.page213-221
ensam.journalMacromolecules
ensam.volume51
ensam.peerReviewingOui
hal.identifierhal-01826372
hal.version1
hal.submission.permittedupdateFiles
hal.statusaccept
dc.identifier.eissn1520-5835


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record