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The inter-layer anion of layered double hydroxides (LDH) with a hydrotalcite (HT)-like structure was ion-exchanged with various organic surf- actants, particularly with long chain aliphatic surfactants. After the ion-exchan- ge process, the basal spacing of the LDH was increased and the increase of the basal spacing depended on various factors, such as the intercalation capacity functionality and orientation capability of the surfactant. Of the employed surf- actants, stearic acid intercalated LDH showed the highest increase of the basal spacing, which was confirmed by XRD analysis. FTIR results supported the in- teraction of the surfactants with the LDH. In addition, an increase in the ther- mal stability of the dodecanedioic acid intercalated HT was evidenced by the TGA method.

Modification of nano-sized layered double hydroxides by long-chain organic aliphatic surfactants