Multifunctional organically modified graphene with super-hydrophobicity

Huawen Hu, Chan C K Allan, Jianhua Li, Yeeyee Kong, Xiaowen Wang, John Haozhong Xin, Hong Hu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

58 Citations (Scopus)

Abstract

In order to bring graphene materials much closer to real world applications, it is imperative to have simple, efficient and eco-friendly ways to produce processable graphene derivatives. In this study, a hydrophilic low-temperature thermally functionalized graphene and its super-hydrophobic organically modified graphene derivative were fabricated. A unique structural topology was found and some of the oxygen functionalities were retained on the thermally functionalized graphene surfaces, which facilitated the subsequent highly effective organic modification reaction and led to the super-hydrophobic organically modified graphene with multifunctional applications in liquid marbles and polymer nanocomposites. The organic modification reaction also restored the graphenic conjugated structure of the thermally functionalized graphene, particularly for organic modifiers having longer alkyl chains, as confirmed by various characterization techniques such as electrical conductivity measurements, ultraviolet/visible spectroscopy and selected area electron diffraction. The free-standing soft liquid marble was fabricated by wrapping a water droplet with the super-hydrophobic organically modified graphene, and showed potential for use as a microreactor. As for the polymer nanocomposites, a strong interfacial adhesion is believed to exist between an organic polymer matrix and the modified graphene because of the organophilic coating formed on the graphene base, which resulted in large improvements in the thermal and mechanical properties of the polymer nanocomposites with the modified graphene, even at very low loading levels. A new avenue has therefore been opened up for large-scale production of processable graphene derivatives with various practicable applications. [Figure not available: see fulltext.]
Original languageEnglish
Pages (from-to)418-433
Number of pages16
JournalNano Research
Volume7
Issue number3
DOIs
Publication statusPublished - 1 Jan 2014

Keywords

  • liquid marbles
  • low-temperature thermally functionalized graphene
  • organic modification
  • organically modified graphene
  • polymer nanocomposites

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Materials Science(all)

Cite this