Researchers have developed a novel nanocomposite based on polyaniline (PANI) doped with terbium (Tb) and reinforced with multi-walled carbon nanotubes (MWCNTs). This material exhibits a remarkable improvement in thermal stability and structural properties compared to pure PANI. The incorporation of Tb and MWCNTs significantly modifies the polyaniline's structure, which could open new avenues for its application in electronic devices and sensors operating under high-temperature conditions.

The study focused on the synthesis and characterization of these nanocomposites, varying the concentrations of terbium and carbon nanotubes. The results indicate that the addition of terbium acts as a dopant that alters the polymeric chain of PANI, while MWCNTs provide mechanical reinforcement and improved thermal conductivity. The synergy between both additives is key to the observed properties, suggesting a complex molecular interaction that stabilizes the polymer.

Characterization techniques employed included thermogravimetric analysis (TGA) to evaluate thermal stability and X-ray diffraction (XRD) to analyze structural changes. TGA data showed that the terbium and MWCNT-doped nanocomposites withstand higher temperatures before degradation, which is crucial for applications in demanding environments. XRD patterns, in turn, revealed modifications in the crystallinity and interplanar spacing of PANI, confirming the successful integration of the additives into the polymer matrix.