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.