@article{article_1602161, title={Properties of poly(2-ethyl aniline)/graphene oxide (PEAn/GO) nanocomposites: influence of a synthesis method and polymerization time}, journal={Journal of Innovative Engineering and Natural Science}, volume={5}, pages={386–398}, year={2025}, DOI={10.61112/jiens.1602161}, author={Anaklı, Duygu}, keywords={graphene oxide, poly (2-ethyl aniline), nanocomposite, polymerization, electrical conductivity}, abstract={In this work, the in situ polymerization of 2-ethyl aniline (2-EAn) in the presence of graphene oxide (GO) as an oxidant was carried out to synthesize conductive GO–poly(2-ethyl aniline) (PEAn) nanocomposites (GO-g-PEAn). GO-assisted GO-PEAn composite (GO-g-PEAn) refers to the chemical bonding and crystallisation of PEAn with a unique structure. The three different polymerization times, 48 h, 120 h and 240 h, were applied to analyze the effect of the reaction time on the polymerization of the composites. GO-PEAn nanocomposites were also synthesized by in situ polymerization of 2-EAn with the oxidant ammonium persulfate (APS), termed APS-GO-PEAn. GO-g-PEAn nanocomposites prepared at 120 h (5-day GO-g-PEAn) were selected as the most suitable composite based on evaluation of both scanning electron imaging and electrical conductivity characterization results. The 5-day GO-g-PEAn nanocomposites were compared with APS-GO-PEAn nanocomposites using X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis. The Fourier Transform Infrared (FTIR) spectrum confirmed the polymerisation of 2-ethyl aniline in the absence of conventional oxidants such as ammonium persulfate, potassium dichromate and potassium permanganate. XRD patterns indicate the presence of a crystalline phase of PEAn, resulting in higher conductivity in GO-g-PEAn nanocomposites than in APS-GO-PEAn nanocomposites. GO-g-PEAn nanocomposites showed promising conditions for their use as an electromagnetic interference (EMI) shielding materials.}, number={1}, publisher={İdris Karagöz}