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Comparison of Surface Properties of Sepiolite and Palygorskite: Surface Energy and Nanoroughness

2021-06-16Journal article Open access
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dc.contributor.authorAlmeida, Ricardo
dc.contributor.authorFerraz, Eduardo
dc.contributor.authorSantarén, Julio
dc.contributor.authorGamelas, José A. F.
dc.date.accessioned2021-12-22T23:57:23Z
dc.date.available2021-12-22T23:57:23Z
dc.date.issued2021-06-16
dc.date.updated2021-12-22T19:50:06Z
dc.description.abstractThe surface properties of two sepiolite samples and one palygorskite sample were compared using inverse gas chromatography (IGC). Samples were previously conditioned at appropriate temperatures for the removal of all zeolitic water. Dispersive (or Lifshitz–van der Waals) component of the surface energy (γsd), specific interactions (−ΔGas) with π electron donor bases (1-alkenes), and nanomorphology indices (IMχT) based on the injections of cycloalkanes and a branched alkane were measured. From IGC data, at 240 °C, it was found that the palygorskite was clearly distinguished from the sepiolites. The palygorskite possessed a lower γsd, larger −ΔGas with 1-alkenes, and remarkably higher IMχT. Slight differences could also be observed between the two sepiolite samples with the same origin. The results were rationalized in terms of the structural features of the two studied minerals. The larger channels of the sepiolite allow for a better insertion of the n-alkanes (longer retention times) while excluding the bulkier probes, such as cyclooctane or 2,2,4-trimethylpentane. Accordingly, the corresponding γsd values were larger and the IMχT values were lower (higher surface nanoroughness) for the sepiolites. Regarding Lewis acid–base properties, all the sample’s surfaces evidenced a very strong amphoteric character. The present results highlight the potential of the evaluated samples for, e.g., adsorption processes with volatile organic compounds or matrix–filler interactions regarding the production of composite structures with Lewis acid–base matrices.pt_PT
dc.description.sponsorshipThe present research was supported by the R&D project titled “FILCNF-New generation of composite films of cellulose nanofibrils with mineral particles as high strength materials with gas barrier properties” (PTDC/QUI-OUT/31884/2017, CENTRO 01-0145-FEDER-031884), funded by the Fundação para a Ciência e Tecnologia (FCT) and FEDER. Strategic Research Centre Project (UIDB/00102/2020) and Techn&Art Project (UID/05488/2018) funded by the FCT are also acknowledged.pt_PT
dc.description.sponsorshipCENTRO-01-0145-FEDER-031884
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.3390/nano11061579pt_PT
dc.identifier.slugcv-prod-2546337
dc.identifier.urihttp://hdl.handle.net/10400.26/38425
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPIpt_PT
dc.relationNew generation of composite films of cellulose nanofibrils with mineral particles as high strength materials with gas barrier properties
dc.relationChemical Process Engineering and Forest Products Research Centre
dc.relation.publisherversionhttps://www.mdpi.com/2079-4991/11/6/1579pt_PT
dc.subjectadsorptionpt_PT
dc.subjectaluminosilicatept_PT
dc.subjectattapulgitept_PT
dc.subjectclay mineralspt_PT
dc.subjectfibrous mineralspt_PT
dc.subjectinverse gas chromatographypt_PT
dc.titleComparison of Surface Properties of Sepiolite and Palygorskite: Surface Energy and Nanoroughnesspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleNew generation of composite films of cellulose nanofibrils with mineral particles as high strength materials with gas barrier properties
oaire.awardTitleChemical Process Engineering and Forest Products Research Centre
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/9471 - RIDTI/PTDC%2FQUI-OUT%2F31884%2F2017/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00102%2F2020/PT
oaire.citation.endPage1579pt_PT
oaire.citation.issue6pt_PT
oaire.citation.startPage1579pt_PT
oaire.citation.titleNanomaterialspt_PT
oaire.citation.volume11pt_PT
oaire.fundingStream9471 - RIDTI
oaire.fundingStream6817 - DCRRNI ID
person.familyNameFerraz
person.givenNameEduardo
person.identifier.ciencia-idC517-A240-7C81
person.identifier.orcid0000-0003-4717-6305
person.identifier.ridB-7140-2014
person.identifier.scopus-author-id7003480912
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.cv.cienciaidC517-A240-7C81 | Eduardo Jorge Marques de Oliveira Ferraz
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication94c2590f-fd7a-44e1-b6cd-31297c9da934
relation.isAuthorOfPublication.latestForDiscovery94c2590f-fd7a-44e1-b6cd-31297c9da934
relation.isProjectOfPublication14949fdf-d268-4ae5-9f3c-5c346049b23d
relation.isProjectOfPublicationfb89bed9-aca7-42a1-b4c3-f8f8cbe99766
relation.isProjectOfPublication.latestForDiscoveryfb89bed9-aca7-42a1-b4c3-f8f8cbe99766

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