Conducting cellulose/TiO2 composites by in situ polymerization of pyrrole

Amany M ElNahrawy; Ahmed A Haroun; Imad Hamadneh; Ammar H Al-Dujaili; Samir Kamel

doi:10.1016/j.carbpol.2017.03.066

Conducting cellulose/TiO₂ composites by in situ polymerization of pyrrole

Carbohydr Polym. 2017 Jul 15:168:182-190. doi: 10.1016/j.carbpol.2017.03.066. Epub 2017 Mar 21.

Authors

Amany M ElNahrawy¹, Ahmed A Haroun², Imad Hamadneh³, Ammar H Al-Dujaili⁴, Samir Kamel⁵

Affiliations

¹ Department of Solid State, Physics Division, National Research Centre, 33 El Bohouth st. (former El tahrir st.), P.O. 12622, Dokki, Giza, Egypt.
² Chemical Industrial Research Division, National Research Centre, 33 El Bohouth st. (former El tahrir st.), P.O. 12622, Dokki, Giza, Egypt.
³ Chemistry Department, Faculty of Science, University of Jordan, 11942 Amman, Jordan.
⁴ Hamdi Mango Center for Scientific Research, University of Jordan, 11942 Amman, Jordan.
⁵ Cellulose and Paper Department, National Research Centre, 33 El Bohouth st. (former El tahrir st.), P.O. 12622, Dokki, Giza, Egypt. Electronic address: samirki@yahoo.com.

PMID: 28457439
DOI: 10.1016/j.carbpol.2017.03.066

Abstract

Cellulose/polypyrrole and cellulose/polypyrrole-TiO₂ composites were prepared via in situ oxidative chemical polymerization of pyrrole using FeCl₃ as oxidant. The concentration effect of pyrrole on the structure and properties of prepared matrix has been investigated. Furthermore, the structure of the prepared materials was characterized using Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), X-ray Diffraction (XRD), and Thermal gravimetrical analysis (TGA). The results exhibited that the addition of cellulose and TiO₂ increase the thermal stability of the polypyrrole system. Moreover, dielectric properties of the obtained composites were studied over frequency range from 42Hz to 5MHz. The electrical measurements including dielectric constant, ε'(ω), dielectric loss, ε''(ω), loss tangent, tan δ and ac conductivity, σac were carried.

Keywords: Cellulose; Dielectric properties; Nano-composite; Polypyrrole; TiO(2)-nanoparticles.