Sono-assisted Synthesis of MgAl-layered Double Hydroxide Nanosheet/multiwalled Carbon Nanotube Filler for the Fabricating of L-isoleucine Amino Acid Based Polymer Nanocomposites

Abstract

Hybrid of acid functionalized multiwalled carbon nanotubes and layered double hydroxides were prepared by coprecipitation reaction of the Al(NO₃)_3·9H₂O, Mg(NO₃)_2·6H₂O, and acid functionalized multiwalled carbon nanotubes under ultrasonic irradiation. An optically active amino acid containing poly(amide-imide) was synthesized by the direct polycondensation reaction of the N,N′-(pyromellitoyl)-bis-L-isoleucine diacid and diamine using molten tetra-n-butylammonium bromide. These three-dimensional nanofillers were used as reinforcing agent to enhance the performance of chiral poly(amide-imide). The structure and morphology of the hybrid materials were confirmed by Fourier transformed infrared spectroscopy, X-ray diffraction, field emission and transmission electron microscopy, and thermogravimetry analysis techniques.

GRAPHICAL ABSTRACT

Keywords:

• Chiral poly(amide-imide)
• Layered double hydroxides
• Multiwalled carbon nanotubes
• Nanocomposites
• Three-dimensional nanofiller
• Transmission electron microscopy