Issue 35, 2015

Effect of organically modified Ni–Al layered double hydroxide loading on the thermal and morphological properties of l-methionine containing poly(amide-imide) nanocomposites

Abstract

This work deals with the synthesis of an organically modified Ni–Al layered double hydroxide (LDH) and the effect of the LDH loading on the thermal and morphological behavior of poly(amide-imide)/Ni–Al LDH nanocomposites. Modified Ni–Al LDH was synthesized by a co-precipitation reaction of Ni(NO3)2·6H2O, Al(NO3)3·9H2O and N,N′-(pyromellitoyl)-bis-L-methionine under ultrasonic irradiation in a short time. The X-ray diffraction (XRD) analysis reveals that the d-spacing value of the modified LDH increases to 2.00 nm from 0.76 nm for the unmodified LDH, which confirms the insertion of a diacid molecule into the LDH interlayers. L-Methionine containing poly(amide-imide) blends with various modified-LDH content (2, 4 and 8 wt% with respect to polymer) were prepared in ethanol under sonication. The structural properties and the thermal behavior of the modified-LDH and polymer based nanocomposites were characterized by XRD, field emission-scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectra and thermogravimetry analysis (TGA) techniques. TEM and FE-SEM results revealed the exfoliated modified-LDH in the polymer matrix. According to the TGA results, the prepared nanocomposites show significantly improved thermal stability at higher temperature because of the homogeneous and good dispersion of modified LDH in the polymeric matrix.

Graphical abstract: Effect of organically modified Ni–Al layered double hydroxide loading on the thermal and morphological properties of l-methionine containing poly(amide-imide) nanocomposites

Article information

Article type
Paper
Submitted
24 Feb 2015
Accepted
13 Mar 2015
First published
13 Mar 2015

RSC Adv., 2015,5, 28007-28013

Author version available

Effect of organically modified Ni–Al layered double hydroxide loading on the thermal and morphological properties of L-methionine containing poly(amide-imide) nanocomposites

S. Mallakpour and M. Dinari, RSC Adv., 2015, 5, 28007 DOI: 10.1039/C5RA03383G

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