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Drying kinetics and acoustic properties of soft porous polymer materials

hal.structure.identifierCentre de Recherche Paul Pascal [CRPP]
dc.contributor.authorKUMAR, Raj
hal.structure.identifierInstitut de Mécanique et d'Ingénierie [I2M]
dc.contributor.authorJIN, Y.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMARRE, Samuel
hal.structure.identifierInstitut de Mécanique et d'Ingénierie [I2M]
dc.contributor.authorPONCELET, Olivier
hal.structure.identifierInstitut de Mécanique et d'Ingénierie [I2M]
dc.contributor.authorBRUNET, Thomas
hal.structure.identifierLaboratoire du Futur [LOF]
dc.contributor.authorLENG, Jacques
hal.structure.identifierCentre de Recherche Paul Pascal [CRPP]
dc.contributor.authorMONDAIN-MONVAL, Olivier
dc.date.issued2020
dc.identifier.issn1380-2224
dc.description.abstractEnWe describe a method for the fabrication of acoustic metasurfaces, which is based on soft porous polymer materials. The materials are obtained using an emulsion templating technique, which allows for the fabrication of soft porous polymers with fully controlled porosity values between 0 and 30%. Our approach involves the polymerization of water-in-silicone emulsions with controlled water volume fractions. The obtained wet solid monolith samples are dried using three different methods. Due to the softness of the polymer matrix, and like in polyHIPE hydrogels or silica aerogels, the first method—regular air drying—leads to a collapse of the material and we present a complete experimental study of the observed kinetics as well as a model to account for the observed results. We show that this model can catch the kinetics characteristics. Then, using two alternative drying techniques, H2O2-assisted and supercritical drying, we show that it is possible to obtain materials with fully controlled porosities. The speed of sound—or equivalently the material acoustic index—inside the material being dependent on its porosity, we obtain a gradient-index acoustic material by spatially controlling the porosity distribution along the two dimensions of these metasurfaces. Their ability in terms of wavefront shaping is then demonstrated through a deflecting experiment performed in water with a sample having a thickness five times smaller than the incident acoustic wavelength at ultrasonic frequencies.
dc.description.sponsorshipAdvanced Materials by Design - ANR-10-LABX-0042
dc.description.sponsorshipRevêtements fonctionnels acoustiques à base de Métamatériaux souples - ANR-15-CE08-0024
dc.description.sponsorshipInitiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003
dc.language.isoen
dc.publisherSpringer Verlag
dc.subject.enPorous materials
dc.subject.enDrying methods
dc.subject.enEmulsion templating
dc.subject.enMetasurfaces
dc.subject.enAcoustic metamaterials
dc.title.enDrying kinetics and acoustic properties of soft porous polymer materials
dc.typeArticle de revue
dc.identifier.doi10.1007/s10934-020-00987-w
dc.subject.halChimie/Polymères
bordeaux.journalJournal of Porous Materials
bordeaux.page249–259
bordeaux.volume28
bordeaux.issue1
bordeaux.peerReviewedoui
hal.identifierhal-02975532
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02975532v1
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