Functionalization of polyallylamine on graphene oxide

Pooja Saini, Prikshit Gautam, Manjari Singh, Ram P. Tandon, S. P. Singh, Ajit K. Mahapatro
2017 Advanced Materials Proceedings  
This work explains the functionalization of polyallylamine (PAA) on the graphene oxide (GO) sheets following a chemical route. The resulting GO-PAA complex is characterized by using various imaging and analytical tools. In the Raman spectroscopy for both the GO and GO-PAA, the appearance of D and G characteristic bands correspond to the sp 2 and sp 3 contents, respectively, in the carbon sheets. The observation of lowered D/G peak intensity ratio of these peaks from 1.3 for GO to 1.1 for GO-PAA
more » ... O to 1.1 for GO-PAA indicates the lowering of the D favored sp 2 content in the GO sheet after PAA functionalization. In the Fourier transform infra-red spectroscopy, the disappearance of the vibrational modes for ketone and carboxyl groups, and appearance of the amine (-NH) group confirms the chemical interaction of GO and PAA triggered with the -NH group of PAA interacting with the oxygen contained hydroxyl, epoxy, and carboxylic groups of the GO sheets to form the GO-PAA complex. Scanning electron microscopy imaging indicates opaque layers with no distinction of flakes after PAA functionalization.
doi:10.5185/amp.2016/3015 fatcat:npauzqzqsraw3aozlru4ec67hq