Functionalized Multi-Walled Carbon Nanotubes with Vitamin C Structures: Characterization and Fabrication of Thiazole Containing Poly(Amide-Imide)-based Composites

Functionalization of multi-walled carbon nanotubes (MWCNTs) by ascorbic acid (vitamin C) was carried out. Then, functionalized MWCNTs were dispersed throughout a poly(amide-imide) (PAI) matrix by ex-situ technique with 5, 10, and 15% loading by weight. The composite hybrid films were prepared by a solvent casting method. It was found that the functionalization of MWCNTs could improve their dispersion and interfacial adhesion to the PAI matrix as proved by field emission scanning and transmission electron microscopy techniques. The modulus, tensile strength, and the thermal stability of the composites were improved in spite of excellent MWCNT dispersion in the matrix.