Novel Polyfuran/Functionalized Multiwalled Carbon Nanotubes Composites With Improved Conductivity: Chemical Synthesis, Characterization, and Antioxidant Activity

摘要

Novel composites containing very small quantities of functionalized multiwalled carbon nanotubes (MWCNTs-COOH; 0.025, 0.050, and 0.075 g), and furan were synthesized via in situ chemical oxidative polymerization. The polymerization was carried out in nitro-methane at room temperature using anhydrous iron (III) chloride (FeCI3) as an oxidant. The nanocomposites were characterized by Fourier transform infrared, ultraviolet-visible, X-ray diffraction, differential scanning calorimetry, and field emission scanning electron microscopy. All synthesized composites were crystalline and showed good solubility in dimethyl sulfoxide and N-methyl 2-pyrrolidone. The conductivity of composites was measured with a four-probe method, and it was found that the electrical conductivity increased by increasing the amount of MWCNTs-COOH. The maximum electrical conductivity value (6.68 x 10~(-4) S cm~(-1)) was obtained for polyfuran/MWCNTs-COOH (1:0.075, v/ w). The resulting composites were analyzed for their antioxidant activity using 2,2-diphenyl-1-picrylhydrazyl assay. The results showed that the antioxidant activity of the composites increased by increasing the amount of MWCNTs-COOH in nanocomposite