Synthesize procedures, mechanical and thermal properties of thiazole bearing poly(amid-imide) composite thin films containing multiwalled carbon nanotubes

Surface functionalization of carbon nanotubes: fabrication and applications

This review highlights recent development in functionalization of CNTs and their applications.

The fabrication and characterization of nanocomposites containing new poly(amide–imide) based on 4,4-methylenebis(3-chloro-2,6-diethyl trimellitimidobenzene) and carboxylic acid-functionalized multiwalled carbon nanotubes

In this article, a nanostructure poly(amide–imide) (PAI) was prepared from the polymerization of 4,4′-methylenebis(3-chloro-2,6-diethyl trimellitimidobenzene) with 3,5-diamino- N-(4-hydroxyphenyl)benzamide using tetra- n-butylammonium bromide as a green media and triphenylphosphite as a condensing agent. This methodology is safe and green since toxic and volatile organic solvents were eliminated. To obtain a homogeneous dispersion of multiwalled carbon nanotubes (MWCNTs) in the PAI matrix, carboxyl-modified MWCNT (CA-MWCNT) was used. The resulting nanocomposites were characterized by Fourier transform infrared spectroscopy, powder X-ray diffraction, field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and thermogravimetric analysis. TEM and FESEM results confirm good dispersion of CA-MWCNTs in the polymer matrix.

Preparation and properties of high-performance poly(amide–imide) composite films based on glucose-functionalized multiwalled carbon nanotubes

Glucose has been covalently linked to multiwalled carbon nanotubes (MWCNTs). After that, the modified MWCNTs were added to a poly(amide–imide) (PAI) matrix. PAI-based composites were fabricated by an ex situ blending technique with 5, 10, and 15% of loading by weight. The composite hybrid films were prepared by a solvent-casting method. The structural properties of all hybrids have been characterized using a large variety of spectroscopic and microscopic techniques. It was found that the functionalization of MWCNTs could improve their dispersion and interfacial adhesion to the PAI matrix. The thermal stability of the MWCNT/PAI composite films was improved due to excellent dispersion of MWCNT in the polymer matrix. Tensile tests on the composites showed an increase in the elastic modulus and the yield strength and a decrease in the failure strain.