Structure and Thermal Degradation Properties of Nanocomposites of Alanine Amino Acid-based Poly(amide–imide) Reinforced with Carboxymethyl-β-cyclodextrin Intercalated in a Layered Double Hydroxide

ABSTRACT

MgAl-layered double hydroxide was intercalated with carboxymethyl-β-cyclodextrin under ultrasonic conditions. Then, different percentages of carboxymethyl-β-cyclodextrin–functionalized layered double hydroxide (carboxymethyl-β-cyclodextrin-layered double hydroxide) was incorporated into the alanine amino acid-based poly(amide–imide) matrix via ultrasonic irradiations to obtain poly(amide–imide)/carboxymethyl-β-cyclodextrin-layered double hydroxide nanocomposites. The surface morphology and thermal degradation behavior of the poly(amide–imide)/carboxymethyl-β-cyclodextrin-layered double hydroxide nanocomposites have been examined by different techniques. The relatively good dispersion of carboxymethyl-β-cyclodextrin-layered double hydroxide into the poly(amide–imide) matrix was detected by transmission electron microscopy. Transmission electron microscopy images represented that the layered double hydroxide platelets were oriented separately and were not detected by X-ray diffraction, which means, the layered double hydroxide layers are exfoliated in the polymer.

GRAPHICAL ABSTRACT

KEYWORDS:

• Carboxymethyl-β-cyclodextrin
• MgAl-layered double hydroxide
• nanocomposites
• poly(amide–imide)

Acknowledgments

The authors extend their gratitude to the Research Affairs Division Isfahan University of Technology (IUT), Isfahan and the National Elite Foundation (NEF).