Synergistic toughening of polymer nanocomposites by hydrogen-bond assisted three-dimensional network of functionalized graphene oxide and carbon nanotubes

Ki Ho Nam, Jaesang Yu, Nam Ho You, Haksoo Han, Bon Cheol Ku

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

We report a facile method to enhance mechanical properties of polymer nanocomposites using three-dimensional (3D) network structures of functionalized graphene oxide (GO) and multi-walled carbon nanotubes (MWCNTs) in a polymer matrix. The GO and MWCNTs were functionalized using Fisher indole and diazonium-salt reactions to produce pyridine (Py) moiety on the GO and MWCNTs. The functionalized GO (Py-RGO) and MWCNT (Py-MWCNT) nanocomposites exhibited hydrogen-bond assisted 3D network structures in a polyimide (PI) matrix. By incorporating 1 wt% of carbon materials (0.9 wt% Py-RGO and 0.1 wt% Py-MWCNTs) in a PI, the tensile strength and modulus of the ternary nanocomposites reached 581 MPa and 31 GPa, respectively, which was an enhancement of 221% and 312% compared with pristine PI. The fracture energy of the PI/Py-RGO/Py-MWCNT nanocomposites improved 200% and approached 29.7 MJ m−3. The formation of the 3D network structure of the functionalized carbon nanomaterials is considered to significantly affect load transfer of nanofillers in the polymer matrix, and produce high performance polymer nanocomposites.

Original languageEnglish
Pages (from-to)228-234
Number of pages7
JournalComposites Science and Technology
Volume149
DOIs
Publication statusPublished - 2017 Sep 8

Bibliographical note

Funding Information:
This work was supported by a grant from the Korea Institute of Science and Technology (KIST) Open Research Program (2E27243) and Nano Material Technology Development Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning.

Publisher Copyright:
© 2017

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Engineering(all)

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