doiSerbia

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

Anbarasan Ramasamy (Department of Polymer Technology, Advanced Nanotechnology Research Laboratory, Kamaraj College of Engineering and Technology, Virudhunagar, Tamil Nadu, India)
Lee Wanduc (Department of Fiber and Polymer Engineering, Hanyang University, Seoul, South Korea)
Soon Seung Im (Department of Fiber and Polymer Engineering, Hanyang University, Seoul, South Korea)

The inter-layer anion of layered double hydroxides (LDH) with a hydrotalcite (HT)-like structure was ion-exchanged with various organic surfactants, particularly with long chain aliphatic surfactants. After the ion-exchange 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 surfactants, stearic acid intercalated LDH showed the highest increase of the basal spacing, which was confirmed by XRD analysis. FTIR results supported the interaction of the surfactants with the LDH. In addition, an increase in the thermal stability of the dodecanedioic acid intercalated HT was evidenced by the TGA method.

Keywords: hybrid, ion-exchange method, XRD, FTIR spectroscopy, TGA