Polyaniline In Situ Grafted to Graphene Sheets

• Main Authors: Enriquez, Erwin P, Yanza, Elliard Roswell S, Tan, Geoffrey Matthew C, Querebilo, Christine Joy, Somintac, Armando, Salvador, Arnel
• Format: text
• Published: Archīum Ateneo 2014
• Subjects: graphene; polyaniline; diazonium salts; composite; Chemistry; Materials Chemistry
• Online Access: https://archium.ateneo.edu/chemistry-faculty-pubs/77; https://archium.ateneo.edu/cgi/viewcontent.cgi?article=1076&context=chemistry-faculty-pubs
• Institution: Ateneo De Manila University

Graphene is one of the most promising allotropes of carbon with wide applications in nanotechnology. Modification of graphene by chemical means can further expand its uses. Here, liquid-exfoliated graphene is functionalized with p-aminophenyl moiety using p-nitrophenyl diazonium salts which were diazotized in situ then reduced by tin(II) chloride. The aminophenyl-graphene thus produced is further modified to form polyaniline-graphene (PANI-GNH) by in situ oxidative graft polymerization of aniline using ammonium peroxydisulfate as oxidizing agent. The properties of the PANI-GNH were compared with polyaniline/graphene blends by Raman, infrared and UV-Visible spectroscopy, and cyclic voltammetry. Indeed, PANI-GNH registered different spectrochemical and electrochemical properties compared with the physically blended PANI and GNH, a manifestation of the effect of chemical grafting on the overall property of the modified graphene.