title: Functionalization and reduction of graphene oxide with p-phenylene diamine for electrically conductive and thermally stable polystyrene composites.
abstract: A facile and efficient approach was developed to simultaneously functionalize and reduce graphene oxide (GO) with p-phenylene diamine (PPD) by simple refluxing. This was possible by the nucleophilic substitution reaction of epoxide groups of GO with amine groups of PPD aided by NH(3) solution. As a consequence, electrical conductivity of GO-PPD increased to 2.1 × 10(2) S/m, which was nearly 9 orders of magnitude higher than that of GO. Additionally, after the incorporation of GO-PPD in polystyrene (PS), the composites exhibited a sharp transition from electrically insulating to conducting behavior with a low percolation threshold of ~0.34 vol %, which was attributed to the improved dispersion and the reduction of GO-PPD. Thermal stability of the PS/GO-PPD composite was also ~8 °C higher than that of PS.
authors.affiliation: State Key Laboratory of Organic-Inorganic Composites, Department of Polymer Engineering, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, China.
authors.forename: Hui-Ling
authors.initials: HL
authors.lastname: Ma
authors.forename: Hao-Bin
authors.initials: HB
authors.lastname: Zhang
authors.forename: Qi-Hui
authors.initials: QH
authors.lastname: Hu
authors.forename: Wen-Juan
authors.initials: WJ
authors.lastname: Li
authors.forename: Zhi-Guo
authors.initials: ZG
authors.lastname: Jiang
authors.forename: Zhong-Zhen
authors.initials: ZZ
authors.lastname: Yu
authors.forename: Aravind
authors.initials: A
authors.lastname: Dasari