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Facile and Robust Production of Ultrastable Micrometer-Sized Foams

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dc.contributor.authorRodríguez Hakim, Mariana
dc.contributor.authorOblak, Luka
dc.contributor.authorVermant, Jan
dc.date.accessioned2025-10-23T07:53:18Z
dc.date.available2025-10-23T07:53:18Z
dc.date.issued2023-05-23
dc.descriptionThe registered version of this article, first published in “ACS Engineering Au 2023, 3", is available online at the publisher's website: ACS Publications, https://doi.org/10.1021/acsengineeringau.3c00005
dc.descriptionLa versión registrada de este artículo, publicado por primera vez en “ACS Engineering Au 2023, 3", está disponible en línea en el sitio web del editor: ACS Publications, https://doi.org/10.1021/acsengineeringau.3c00005
dc.description.abstractStable foams that can resist disproportionation for extended periods of time have important applications in a wide range of technological and consumer materials. Yet, legislative initiatives limit the range of surface active materials that can be used for environmental impact reasons. There is a need for technologies to efficiently produce multiphase materials using more eco-friendly components, such as particles, and for which traditional thermodynamics-based processing routes are not necessarily efficient enough. This work describes an innovative foaming technology that can produce ultrastable Pickering-Ramsden foams, with bubbles of micrometer-sized dimensions, through pressure-induced particle densification. Specifically, aqueous nanosilica-stabilized foams are produced by foaming a suspension at subatmospheric pressures, allowing for adsorption of the particles onto large bubbles. This is followed by an increase back to atmospheric pressure, which induces bubble shrinkage and compresses the adsorbed particle interface, forming a strong elastoplastic network that provides mechanical resistance against disproportionation. The foam’s interfacial mechanical properties are quantified to predict the range of processing conditions needed to produce permanently stable foams, and a general stability criterion is derived by considering the interfacial rheological properties under slow, unidirectional compression. Foams that are stable against disproportionation are characterized by interfaces whose mechanical resistance to compressive deformations can withstand their tendency to minimize the interfacial stress by reducing their surface area. Our ultrastable nanosilica foams are tested in real-life applications by introducing them into concrete. In comparison to other commercial air entrainers, our microfoam improves concrete’s freeze–thaw resistance while supplying higher material strength, providing an economically attractive, industrially scalable, and durable alternative for use in real-life applications involving cementitious materials. The applicability of our stability criterion to other rheologically complex interfaces and the versatile nature of our foaming technology enables usage for a broad class of materials, beyond the construction industry.en
dc.description.versionversión publicada
dc.identifier.citationMariana Rodríguez-Hakim, Luka Oblak, and Jan Vermant ACS Engineering Au 2023 3 (4), 235-248 DOI: 10.1021/acsengineeringau.3c00005
dc.identifier.doihttps://doi.org/10.1021/acsengineeringau.3c00005
dc.identifier.issn2694-2488
dc.identifier.urihttps://hdl.handle.net/20.500.14468/30588
dc.journal.issue4
dc.journal.titleACS Engineering Au
dc.journal.volume3
dc.language.isoen
dc.page.final248
dc.page.initial235
dc.publisherACS
dc.relation.centerFacultad de Ciencias
dc.relation.departmentFísica Fundamental
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.es
dc.subject22 Física
dc.subject.keywordsaqueous foamsen
dc.subject.keywordsPickering-Ramsden foamsen
dc.subject.keywordsdisproportionationen
dc.subject.keywordsfoam stabilityen
dc.subject.keywordsinterfacial rheologyen
dc.subject.keywordselastoplastic interfacesen
dc.subject.keywordscementitious materialsen
dc.titleFacile and Robust Production of Ultrastable Micrometer-Sized Foamsen
dc.typeartículoes
dc.typejournal articleen
dspace.entity.typePublication
relation.isAuthorOfPublication0d3ca748-728d-48f4-b71c-55f101dfb9d8
relation.isAuthorOfPublication.latestForDiscovery0d3ca748-728d-48f4-b71c-55f101dfb9d8
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