Exfoliation and dispersion of LDH modified with N-tetrabromophthaloyl-glutamic in poly(vinyl alcohol): Morphological and thermal studies

Abstract

In this study, modified LDH (M-LDH) was synthesized by the co-precipitation reaction of Al(NO 3) 3.9H 2 O, Mg(NO 3) 2.6H 2 O and N-tetrabromophthaloyl-glutamic (Br-Gl) in short time. M-LDH nano-fillers were embedded into poly(vinyl alcohol) (PVA) matrix via ultrasonic irradiation technique which provided PVA/M-LDH NCs. The morphology and structure of the prepared samples were characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis (TGA), field emission scanning electron microscopy and X-ray diffraction techniques TGA of the PVA/M-LDH NCs showed that the thermal stability was improved. The enhancement of thermal properties was ascribed to the homogeneous and good dispersion of M-LDH sheets in the PVA matrix by hydrogen bonding between O-H groups of PVA and the M-LDH. [Figure not available: see fulltext.]