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.
@article{arxiv.1004.4281,
title = {Investigations on synthesis and characterization of functionalized graphene sheets-polyacrylamide composites},
author = {Ratnesh Pandey and Kalpana Awasthi and R. S. Tiwari and O. N. Srivastava},
journal= {arXiv preprint arXiv:1004.4281},
year = {2010}
}