2010/04/24 by Ratnesh K. Pandey, Ratnesh Pandey, Kalpana Awasthi +8
Materials Science · Physics and Astronomy · #Conducting polymers and applications #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Polymer Nanocomposite Synthesis and Irradiation #Supercapacitor Materials and Fabrication #cond-mat.mes-hall
paper · pdf · doi:10.48550/arxiv.1004.4281
arxiv created 2010/04/24 · openalex publication_date 2010/04/24 · arxiv updated 2010/04/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The functionalized graphene sheets (FGS)-polyacrylamide (PAM) composite films have been prepared by solution cast technique. The FGS have been synthesized by thermal exfoliation of graphite oxide. Several composites with different weight % (between 0 to 25 wt %) of FGS loading in PAM have been prepared and characterized by XRD, SEM, TEM and FTIR spectroscopy. FTIR analysis revealed the existence of the amide linkage (-NHC= O) between the polymer chain and oxygenated graphene sheets. The electrical and mechanical properties of FGS-PAM composite films have been studied by employing low temperature dc electrical conductivity measurement and nanoindentation technique. A significant increase in both electrical conductivity and mechanical properties (hardness and elastic modulus) is observed at 15 wt% loading of FGS in PAM. As the FGS loading increases from 0 to 25 wt% the conductivity of composite film increases by seven orders of magnitude (~5.55x10-7 to 1.42 S/cm). The hardness and elastic modulus of FGS (~15 wt%)PAM film increased four and five fold, respectively as compared to that of PAM film. To our knowledge studies on FGS-PAM composites and also improvement of both the electrical and mechanical properties have not yet been made.