Afficher la notice abrégée

Thermomagnetically Responsive γ-Fe2O3@Wax@SiO2 Sub-Micrometer Capsules

dc.rights.licenseopen
hal.structure.identifierCentre de recherches Paul Pascal [CRPP]
dc.contributor.authorBAILLOT, Marion
hal.structure.identifierLaboratoire de Chimie des Polymères Organiques [LCPO]
hal.structure.identifierTeam 3 LCPO : Polymer Self-Assembly & Life Sciences
dc.contributor.authorHEMERY, Gauvin
hal.structure.identifierTeam 3 LCPO : Polymer Self-Assembly & Life Sciences
hal.structure.identifierLaboratoire de Chimie des Polymères Organiques [LCPO]
dc.contributor.authorSANDRE, Olivier
hal.structure.identifierCentre de recherches Paul Pascal [CRPP]
dc.contributor.authorSCHMITT, Veronique
hal.structure.identifierCentre de recherches Paul Pascal [CRPP]
dc.contributor.authorBACKOV, Renal
dc.date.accessioned2020
dc.date.available2020
dc.date.issued2017
dc.identifier.issn0934-0866
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/19979
dc.description.abstractEnA three steps synthesis route is proposed to generate the first thermo-sensitive and magnetically responsive γ-Fe2O3@Wax@SiO2 submicron capsules with a paraffinic core and a solid and brittle shell. The process integrates Pickering-based emulsions, inorganic and sol-gel chemistries to promote monodisperse in size wax droplets, γ-Fe2O3 nanoparticles and mineralization of the wax/water interfaces. Final hybrid capsules are obtained with an average size around 800 nm, representing thereby the first example of sub-micrometer capsules generated employing Pickering emulsions as templates. Cetyltrimethylammonium bromide (CTAB) cationic surfactant added during mineralization at concentrations between 0.17 wt.% and 1.0 wt.% impact the shell density. The shell density seems to improve its mechanical strength while affording a low wax expansion volume without breaking for CTAB concentrations above 1.0 wt.%. On the contrary, for the lower CTAB concentration (0.17 wt.%), the silica shell becomes less bulky and cannot resist the wax dilatation induced by the solid-to-liquid phase transition imposed by hyperthermia. The magnetically-induced heating provided by the internal magnetic moments is sufficient to melt the wax core, expanding its volume, inducing thereby the surrounding silica shell rupture. Such γ-Fe2O3@Stearic Acid@Wax@SiO2 submicron capsules allow a sustained wax release with time, whereby 20% of the wax is being released after 50 minutes of alternating magnetic field (AMF) treatment.
dc.language.isoen
dc.publisherWiley-VCH Verlag
dc.subject.enstimuli responsive capsules
dc.subject.enMagnetic hyperthermia
dc.subject.enintegrative chemistry
dc.subject.enPickering emulsions
dc.subject.ensol–gel chemistry
dc.title.enThermomagnetically Responsive γ-Fe2O3@Wax@SiO2 Sub-Micrometer Capsules
dc.typeArticle de revue
dc.identifier.doi10.1002/ppsc.201700063
dc.subject.halChimie/Matériaux
bordeaux.journalParticle and Particle Systems Characterization
bordeaux.pagepp. 1-13
bordeaux.volume34
bordeaux.hal.laboratoriesLaboratoire de Chimie des Polymères Organiques (LCPO) - UMR 5629*
bordeaux.issue1700063
bordeaux.institutionBordeaux INP
bordeaux.institutionUniversité de Bordeaux
bordeaux.peerReviewedoui
hal.identifierhal-01610909
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01610909v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Particle%20and%20Particle%20Systems%20Characterization&rft.date=2017&rft.volume=34&rft.issue=1700063&rft.spage=pp.%201-13&rft.epage=pp.%201-13&rft.eissn=0934-0866&rft.issn=0934-0866&rft.au=BAILLOT,%20Marion&HEMERY,%20Gauvin&SANDRE,%20Olivier&SCHMITT,%20Veronique&BACKOV,%20Renal&rft.genre=article


Fichier(s) constituant ce document

FichiersTailleFormatVue

Il n'y a pas de fichiers associés à ce document.

Ce document figure dans la(les) collection(s) suivante(s)

Afficher la notice abrégée