Springback effect and structural features during the drying of silica aerogels tracked by in-situ synchrotron X-ray scattering

dc.contributor.authorZemke, Fabian
dc.contributor.authorScoppola, Ernesto
dc.contributor.authorSimon, Ulla
dc.contributor.authorBekheet, Maged F.
dc.contributor.authorWagermaier, Wolfgang
dc.contributor.authorGurlo, Aleksander
dc.date.accessioned2022-06-27T10:46:33Z
dc.date.available2022-06-27T10:46:33Z
dc.date.issued2022-05-09
dc.description.abstractThe springback effect during ambient pressure drying of aerogels is an interesting structural phenomenon, consisting of a severe shrinkage followed by almost complete re-expansion. The drying of gels causes shrinkage, whereas re-expansion is believed to be linked to repelling forces on the nanoscale. A multi-scale structural characterization of this significant volume change is key in controlling aerogel processing and properties. In this work, hydrophobic, monolithic silica aerogels with high specific surface areas were synthesized by modification with trimethylchlorosilane and ambient pressure drying. Here, we report a multi-method approach focusing on in-situ X-ray scattering to observe alterations of the nanostructured material during the drying of surface-modified and unmodified silica gels. Both show a porous fractal nanostructure, which partially collapses during drying and only recovers in surface-modified samples during the springback effect. Distinct changes of the X-ray scattering data were reproducibly associated with the shrinkage, re-expansion and drying of the gel network. Our findings may contribute to tailor aerogels with specific functionality, as the springback effect has a direct influence on properties (e.g., porosity, pore size distribution), which is directly affected by the degree of re-expansion.en
dc.description.sponsorshipTU Berlin, Open-Access-Mittel – 2022en
dc.description.sponsorshipDFG, 454019637, Ursache des Springback-Effektes in den bei Raumtemperatur und Normaldruck hergestellten Silica und anderen metalloxidischen Aerogelenen
dc.identifier.eissn2045-2322
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/17161
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-15940
dc.language.isoenen
dc.relation.ispartof10.14279/depositonce-19594
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subject.ddc620 Ingenieurwissenschaften und zugeordnete Tätigkeitende
dc.subject.othercharacterization and analytical techniquesen
dc.subject.otherdesign, synthesis and processingen
dc.subject.othernanoscale materialsen
dc.titleSpringback effect and structural features during the drying of silica aerogels tracked by in-situ synchrotron X-ray scatteringen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.articlenumber7537en
dcterms.bibliographicCitation.doi10.1038/s41598-022-11127-6en
dcterms.bibliographicCitation.journaltitleScientific Reportsen
dcterms.bibliographicCitation.originalpublishernameSpringer Natureen
dcterms.bibliographicCitation.originalpublisherplaceHeidelbergen
dcterms.bibliographicCitation.volume12en
tub.accessrights.dnbfreeen
tub.affiliationFak. 3 Prozesswissenschaften::Inst. Werkstoffwissenschaften und -technologien::FG Keramische Werkstoffede
tub.affiliation.facultyFak. 3 Prozesswissenschaftende
tub.affiliation.groupFG Keramische Werkstoffede
tub.affiliation.instituteInst. Werkstoffwissenschaften und -technologiende
tub.publisher.universityorinstitutionTechnische Universität Berlinen

Files

Original bundle
Now showing 1 - 1 of 1
Loading…
Thumbnail Image
Name:
Zemke_etal_Springback_2022.pdf
Size:
2.75 MB
Format:
Adobe Portable Document Format
Description:
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
4.86 KB
Format:
Item-specific license agreed upon to submission
Description:

Collections