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dc.contributor.authorČapková, Pavla
dc.contributor.authorPospíšil, Miroslav
dc.contributor.authorValášková, Marta
dc.contributor.authorMěřínská, Dagmar
dc.contributor.authorTrchová, Miroslava
dc.contributor.authorSedláková, Z.
dc.contributor.authorWeiss, Zdeněk
dc.contributor.authorŠimoník, Josef
dc.identifier.citationJournal of Colloid and Interface Science. 2006, vol. 300, issue 1, p. 264-269.en
dc.description.abstractStructural analysis of Na-montmorillonite co-intercalated with octadecylamine and stearic acid was carried out using combination of experiment: X-ray powder diffraction and IR spectroscopy with molecular modeling (force field calculations) in Cerius2 modeling environment. Results of structure analysis revealed the chemical reaction of guest compounds leading to the formation of octadecylammonium stearate. This reaction may occur even before the intercalation out of the interlayer space of montmorillonite. The presence of octadecylammonium stearate in the samples was clearly confirmed by IR spectroscopy and X-ray diffraction. Present results also showed that: (1) Stearic acid itself does not intercalate into Na-montmorillonite; (2) cointercalation with octadecylamine led to the formation of octadecylammonium stearate, which was successfully intercalated into the interlayer space of montmorillonite, and (3) Na-montmorillonite intercalated with octadecylammonium stearate does not create a stable structure. Intercalated samples in ambient conditions undergo gradual decomposition, accompanied by the release of octadecylammonium stearate from the interlayer space and rearrangement of the interlayer structure. Co-intercalation of STA and ODA to lower the octadecylamine content and consequently to suppress the unfavorable effect of amine groups on the polymer matrix in nanocomposite, was investigated.en
dc.relation.ispartofseriesJournal of Colloid and Interface Scienceen
dc.subjectpolymer–clay nanocompositesen
dc.subjectstearic aciden
dc.subjectmolecular modelingen
dc.subjectIR spectroscopyen
dc.subjectX-ray diffractionen
dc.titleStructure of montmorillonite cointercalated with stearic acid and octadecylamine : modeling, diffraction, IR spectroscopyen
dc.identifier.locationNení ve fondu ÚKen

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