ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

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

Laiane S. da Silva, Matheus M. Biondo, Bianca de A. Feitosa, Ana L. F. Rocha, Camila da C. Pinto, Suzan X. Lima, Cláudia de L. Nogueira, Sérgio M. de Souza, Yurimiler L. Ruiz, Pedro H. Campelo, and Edgar A. Sanches

Programa de Pós-Graduação em Ciência e Engenharia de Materiais (PPGCEM), Universidade Federal do Amazonas (UFAM), Manaus, Brazil

E-mail: matheusbiondo@ufam.edu.br

Received: 18 June 2021  Accepted: 27 August 2021

Abstract:

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 ​​(σ_dc) 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.

Graphic abstract

Keywords: Polyaniline; Bambusa vulgaris; Nanocomposite; Cellulose extraction

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-021-01844-z

Chemical Papers 76 (1) 309–322 (2022)