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dc.contributor.authorTejedor De León, A.
dc.contributor.authorNavarro, G.
dc.contributor.authorRubio, J.
dc.date.accessioned2017-08-23T16:56:39Z
dc.date.accessioned2017-08-23T16:56:39Z
dc.date.available2017-08-23T16:56:39Z
dc.date.available2017-08-23T16:56:39Z
dc.date.issued2013-05
dc.date.issued2013-05
dc.identifier.urihttp://ridda2.utp.ac.pa/handle/123456789/2863
dc.identifier.urihttp://ridda2.utp.ac.pa/handle/123456789/2863
dc.descriptionA combination of SEM (Scanning Electron Microscopy) and AFM (Atomic Force Microscopy) techniques was used to characterise the morphology of Brazilian montmorillonites before and after intercalation of some organic compounds. AFM revealed that the layers are staked over above the others. The surface of the particles consisted of layers bounded with smooth flat basal planes and larger edges ending in some cascade-like steps 184 µm wide. Some micro and macro valleys (0.6 µm deep) are distributed throughout the whole area and irregularities on basal planes may be attributed to the crystallographic conditions of the genesis of these Brazilian montmorillonites. The mapping performed over 20 x 40 areas showed adhesion forces of 11 nN magnitude on bare clay mineral in the Na+ form and 40 nN for the calcium form. Forces between 10 and 6 nN were found after organic intercalation. In general, the intercalation caused significant changes in the surface properties of clay mineral. The combination of AFM and SEM studies provided evidence about the poorl crystallinity of the Brazilian montmorillonites.en_US
dc.description.abstractA combination of SEM (Scanning Electron Microscopy) and AFM (Atomic Force Microscopy) techniques was used to characterise the morphology of Brazilian montmorillonites before and after intercalation of some organic compounds. AFM revealed that the layers are staked over above the others. The surface of the particles consisted of layers bounded with smooth flat basal planes and larger edges ending in some cascade-like steps 184 µm wide. Some micro and macro valleys (0.6 µm deep) are distributed throughout the whole area and irregularities on basal planes may be attributed to the crystallographic conditions of the genesis of these Brazilian montmorillonites. The mapping performed over 20 x 40 areas showed adhesion forces of 11 nN magnitude on bare clay mineral in the Na+ form and 40 nN for the calcium form. Forces between 10 and 6 nN were found after organic intercalation. In general, the intercalation caused significant changes in the surface properties of clay mineral. The combination of AFM and SEM studies provided evidence about the poorl crystallinity of the Brazilian montmorillonites.en_US
dc.languageeng
dc.language.isoengen_US
dc.rightshttps://creativecommons.org/licenses/by-nc-sa/4.0/
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectatomic force microscopyen_US
dc.subjectorganoclaysen_US
dc.subjectmontmorillonitesen_US
dc.subjectscanning electron microscopýen_US
dc.subjectatomic force microscopy
dc.subjectorganoclays
dc.subjectmontmorillonites
dc.subjectscanning electron microscopý
dc.titleMorphological Characterization of Brazilian Organ Clays Using AFM and SEM Studiesen_US
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion


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