Novel chiral poly(amide-imide) nanocomposites reinforced with silicate layers and TiO₂ nanoparticles based on N-trimellitylimido-l-isoleucine

Abstract

In the present investigation, the goal was the preparation, characterization, and surface morphology of poly(amide-imide)/TiO2/oganoclay nanocomposites. At first, an optically active poly(amide-imide) was synthesized from the polymerization reaction of N-trimellitylimido-l-isoleucine diacid with 4,4′-methylenebis(3-chloro-2,6-diethylaniline). The obtained polymer and TiO2 nanoparticles were used to prepare poly(amide-imide)/TiO2 nanocomposites through ultrasonic irradiation. Then, different amounts of organoclay were added to the poly(amide-imide)/TiO2 nanocomposite system to obtain poly(amide-imide)/TiO2/oganoclay nanocomposite. The resulting hybrids materials were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, and thermogravimetric analysis techniques.

Dispersion of surface-modified nano-Fe3O4 with poly(vinyl alcohol) in chiral poly(amide-imide) bearing pyromellitoyl-bis-l-phenylalanine segments

“…From a technological point of view, the use of an organic solvent in large scale preparation is not very friendly, and molten TBAB salt was selected as ionic liquid because it proved to be the most valuable among those employed. Due to their nonvolatility, ionic liquids have a little effect on the environment and human health and so, they are known as green solvents due to their properties such as chemical stability, low-to-high viscosity and high ionic conductivity properties [30][31][32][33][34][35]. Diamine 4 could improve thermal and solubility properties of the final polymer, owing to the aromatic nature of it.…”

“…As part of our continuing efforts in developing tractable chiral macromolecules including natural amino acid [27][28][29][30][31][32][33][34], in this work for the first time, we reported the synthesis of NC materials based on amino acid containing PAI and modified Fe 3 O 4 NPs. In this way, at first, the Fe 3 O 4 NPs were successfully fabricated by the reaction between Fe2 ?…”

First-principles study of trimethylamine adsorption on anatase TiO2 nanorod surfaces

“…The behavior of amines as adsorbates on TiO 2 nanosystems has recently attracted considerable interest, since they are widely used as nitrogen source in the synthesis of N-doped TiO 2 nanocrystals, acting either as precursors or as post-synthetic modifying agents [17][18][19][20], and also because polymers containing amino groups are often employed together with TiO 2 nanoparticles in nanocomposite materials [21][22][23][24]. Moreover, new promising solid-state sensitized solar cells rely on hybrid organic/ inorganic perovskite materials that are composed of methylammonium, lead cations and halide anions [25][26][27].…”

The surface modification of CuO nanoparticles with a flame retardant coupling agent and their influence on the thermal stability of poly(amide-imide)/CuO nanocomposites

“…29 The synthesis and characterization of PAI-based NCs reinforced with different modified NPs were reported in our previous works. [30][31][32][33] In the present study, the fabrication of optically active and thermally stable PAI/CuO NCs was carried out using ultrasonic technique. For this purpose, 2,3,4,5-tetrabromo-6-[(4-hydroxyphenyl) carbamoyl] benzoic acid (THBA) was used as a surface modifier.…”