Chemical synthesis and characterization of poly (pyrrole-co-o-aminophenol)/chitosan composite

In this study, poly(pyrrole-co-o-aminophenol)/chitosan composite samples were synthesized by chemical method (as powder) in solutions of different molar ratios of pyrrole and o-aminophenol (8:2, 1:1 and 2:8). Composite samples were characterized by FT-IR (Fourier Transform Infrared), solubility tests, H-1-NMR (Nuclear Magnetic Resonance), DSC (Differential Scanning Calorimetry), CV (Cyclic Voltammetry) and SEM (Scanning Electron Microscope) images. As a results of the solubility test, it was observed that the solubility of the composite decreased as the pyrrole ratio increased. Also, the best solvents for composite samples determined as DMSO and DMF. When SEM images of copolymer and composite samples are examined, it is seen that the copolymer structure shows a structure in the form of regular small particles, while large nebula-shaped structures are formed after composite formation with chitosan. In addition, it was determined that the structures of the composite samples prepared in solutions containing different ratios of monomers differ from each other depending on the monomer ratios. According to DSC thermal analysis results of composite samples, it was concluded that the thermal stability of the composite samples having high pyrrole ratio (8:2) was better than the composite samples having low pyrrole ratio (1:1, 2:8). The electrochemical behavior of the composites was achieved by cyclic voltammetry technique. Electrochemical stability studies show that composite samples have good redox behavior, do not degrade during redox behavior, and are therefore very stable electrochemically.

Automated summary

In this study, poly(pyrrole-co-o-aminophenol)/chitosan composite samples were synthesized using a chemical method. The solubility of the composite decreased as the pyrrole ratio increased, and the best solvents for the composite samples were determined as DMSO and DMF. The SEM images showed that the composite samples had different structures compared to the copolymer, and the thermal stability of the composites varied depending on the pyrrole ratio. Cyclic voltammetry studies demonstrated that the composite samples had good redox behavior and were electrochemically stable.