• 文献标题:   The production of concentrated dispersions of few-layer graphene by the direct exfoliation of graphite in organosilanes
  • 文献类型:   Article
  • 作  者:   NUVOLI D, ALZARI V, SANNA R, SCOGNAMILLO S, PICCININI M, PEPONI L, KENNY JM, MARIANI A
  • 作者关键词:   graphene, organosilane, high concentration, liquid exfoliation
  • 出版物名称:   NANOSCALE RESEARCH LETTERS
  • ISSN:   1931-7573 EI 1556-276X
  • 通讯作者地址:   ICTP CSIC
  • 被引频次:   21
  • DOI:   10.1186/1556-276X-7-674
  • 出版年:   2012

▎ 摘  要

We report the formation and characterization of graphene dispersions in two organosilanes, 3-glycidoxypropyl trimethoxysilane (GPTMS) and phenyl triethoxysilane (PhTES) as new reactive solvents. The preparation method was mild and easy and does not produce any chemical modification. The dispersions, which exhibit the Tyndall effect, were characterized by TEM and Raman spectroscopy to confirm the presence of few-layer graphene. Concentrations as high as 0.66 and 8.00 mg/ml were found for PhTES and GPTMS, respectively. The latter is one of the highest values reported for a dispersion of graphene obtained by any method. This finding paves the way for the direct synthesis of polymer nanofiller-containing composites consisting of graphene and reactive silanes to be used in sol-gel synthesis, without any need for solvent removal, thus preventing graphene reaggregation to form graphite flakes.