Semiconducting nanocomposite based on the incorporation of polyaniline on the cellulose extracted from Bambusa vulgaris: structural, thermal and electrical properties.

Autor: da Silva, Laiane S., Biondo, Matheus M., Feitosa, Bianca de A., Rocha, Ana L. F., Pinto, Camila da C., Lima, Suzan X., Nogueira, Cláudia de L., de Souza, Sérgio M., Ruiz, Yurimiler L., Campelo, Pedro H., Sanches, Edgar A.
Zdroj: Chemical Papers; Jan2022, Vol. 76 Issue 1, p309-322, 14p
Abstrakt: Polyaniline Emeraldine-salt (PANI-ES)/Cellulose nanocomposite was synthesized based on the in situ polymerization of aniline over cellulose extracted from Bambusa vulgaris. X-ray diffraction (XRD) analysis suggested that the extraction process produced smaller and better oriented cellulose nanocrystals when compared to the bamboo in-natura cellulose. PANI-ES influenced on the orientation of the cellulose crystals in the nanocomposite form, increasing the intensity of the planes (0 0 2) and (1 −2 1), besides contributing with more than 60% of the X-ray scattering. Fourier-transform Infrared (FTIR) spectroscopy revealed that characteristic bands of cellulose in the nanocomposite, such as that at 1164 cm−1, presented a red shift about 14 cm−1, probably due to a chemical interaction between matrix and reinforcement. Thermogravimetry/derivative Thermogravimetry (TG/dTG) analysis showed that the nanocomposite degradation in 157 °C was the lowest among the bamboo in-natura and extracted cellulose, and it was attributed to the presence of Cl - counterions in the PANI-ES chains. The dc electrical conductivity values ​​(σdc) were 8.53 × 10−3 S/cm, 1.05 × 10−4 S/cm and 2.10 × 10−9 S/cm for PANI-ES, PANI-ES/Cellulose and extracted cellulose, respectively. Scanning Electron Microscopy (SEM) analysis revealed the formation of a polymer film all over the surface of cellulose fibers. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
Externí odkaz: