Structural ordering of organovermiculite: Experiments and modeling

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aaK citaci nebo jako odkaz na tento záznam použijte identifikátor: http://hdl.handle.net/10084/62777

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dc.contributor.author Simha Martynková, Gražyna
dc.contributor.author Valášková, Marta
dc.contributor.author Čapková, Pavla
dc.contributor.author Matějka, Vlastimil
dc.date.accessioned 2007-09-17T11:49:00Z
dc.date.available 2007-09-17T11:49:00Z
dc.date.issued 2007
dc.identifier.citation Journal of colloid and interface science. 2007, vol. 313, issue 1, p. 281-287. en
dc.identifier.issn 0021-9797
dc.identifier.uri http://hdl.handle.net/10084/62777
dc.language.iso en en
dc.publisher Elsevier en
dc.relation.ispartofseries Journal of colloid and interface science en
dc.relation.uri http://dx.doi.org/10.1016/j.jcis.2007.04.007 en
dc.subject quaternary ammonium salts en
dc.subject vermiculite en
dc.subject intercalation en
dc.subject modeling en
dc.subject nonbond energy en
dc.subject mean crystallite size en
dc.subject XRD en
dc.title Structural ordering of organovermiculite: Experiments and modeling en
dc.type article en
dc.identifier.location Není ve fondu ÚK en
dc.description.abstract-en The ordering of three different sizes of quaternary ammonium salts (QUATs) has been studied with respect to concentration of guests in the host's interlayer gallery. From the modeling, we could verify that small molecules of n-butylammonium salt build a monolayer structure in the vermiculite gallery without reference to concentration. On the other hand, the larger molecules of dodecyltrimethylammonium and dioctadecyldimethylammonium salts are responsive to the numbers of their molecules in the interlayer space of the host, building mono- or bilayered structures. Supersaturated structure of both QUATs keep an arrangement of alkyl chains nearly perpendicular to silicate layers, while only saturated samples exhibit tilted alkyl chains in the gallery. The ordering changes bring out the calculation of mean crystallite size. Low values of the nonbond energy of supersaturated forms predict that those organovermiculites will readily exfoliate, e.g., in polymer/clay nanocomposite en
dc.identifier.doi 10.1016/j.jcis.2007.04.007
dc.identifier.wos 000248351900036

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