Oleate–LDH Hybrids by the Successive Use of the Clay Structural "Memory Effect"
Oleate/LDH composites have been obtain by calcination–reconstruction procedures by the successive uses of the anionic clay memory effect. XRD and FTIR analysis were used to study the structural characteristics of the hybrid samples. The amount of oleate in the hybrid formulation
of the clay matrix is highest after the second calcination–reconstruction cycle. After the fourth cycle the clay structure is not recovered anymore. This result points out to the "short" structural "memory" of the LDH-like clays. Textural features of the samples were studied by N2
adsorption at 77 K, SEM and TEM analyses. The oleate/LDH hybrids, obtained by the successive uses of the clay "memory," are defined by different crystallinity and micromorphological characteristics.
Keywords: ANIONIC CLAY; HYDROTALCITE; MEMORY EFFECT; OLEATE
Document Type: Research Article
Publication date: 01 April 2010
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