Thermal and morphology characterization study of bio‐active poly (amide‐imide)‐based nanocomposites reinforced with modified SiO2 nanoparticle with poly (vinyl alcohol)

Abstract

Among the nanoparticles (NPs), the amorphous SiO₂ NPs are very useable, because of their important characteristics for different applications, such as mechanical performance, thermal properties, and biodegradability effects. For this manifest features SiO₂ NPs were used as filler in this study. Firstly, these NPs were modified with poly(vinyl alcohol) (PVA). Then, the poly(amide‐imide) (PAI) was synthesized from reaction betweenN‐trimellitylimido‐l‐methionine and 4,4′‐diaminodiphenylether in the presence of ionic liquid and triphenyl phosphite. Next, the modified SiO₂ NPs with PVA (SiO₂‐PVA) were incorporated into the PAI matrix for the preparation of PAI‐SiO₂‐PVA nanocomposites (PSiPNs). Finally, the resulting SiO₂‐PVA and PSiPNs were characterized by different analyses like field emission scanning electron microscopy, Fourier transform infrared spectroscopy, X‐ray diffraction, transmission electron microscopy, and thermogravimetric analysis (TGA). TGA showed high thermal stability of the obtained PSiPNs compared to the pure PAI.