title: Preparation and characterization of graphene/poly(diphenylamine) composites.
abstract: Nanocomposites of graphene nanosheets and poly(diphenylamine) (graphene-PDPA) were synthesized via the in-situ oxidative polymerization of diphenylamine in a sulphuric acid medium. First, graphite oxide (GO) was prepared by oxidation of natural graphite using the modified Hummer's method and subsequently reduced using hydrazine monohydrate. The as-prepared graphene sheets were noncovalently grafted with PDPA using ammonium peroxydisulphate as an oxidant. During the polymerization, graphene sheets were homogeneously dispersed in the PDPA matrix. The formation of the hybrid material was confirmed by FTIR, XPS, TGA, HRTEM, FESEM and XRD measurements. XPS analysis revealed the removal of oxygen functionality from the GO surface after reduction and the bonding structure of the reduced hybrids. In addition, the nanocomposites showed better thermal properties due to the intrinsic property of the graphene sheets.
authors.affiliation: Department of Imaging System Engineering, Pukyong National University, Busan 608-737, Korea.
authors.forename: Niranjanmurthi
authors.initials: N
authors.lastname: Lingappan
authors.forename: Yeon Tae
authors.initials: YT
authors.lastname: Jeong
authors.forename: Yeong-Soon
authors.initials: YS
authors.lastname: Gal
authors.forename: Kwon Taek
authors.initials: KT
authors.lastname: Lim
mesh_terms: D003460:Crystallization / Q000379:methods*; D006108:Graphite / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008567:Membranes, Artificial; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D010655:Phenylenediamines / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D046911:Macromolecular Substances; D008567:Membranes, Artificial; D010655:Phenylenediamines; C521449:poly(p-phenylenediamine); D006108:Graphite