Journal of Coatings Technology and Research

, Volume 17, Issue 1, pp 91–100 | Cite as

Epoxy functionalization of multiwalled carbon nanotubes for their waterborne polyurethane composite with crosslinked structure

  • Shaohui Wang
  • Huafeng Duan
  • Guozhang MaEmail author
  • Caiying Hou
  • Jianbin Wu
  • Shasha Li
  • Ziyuan Yang
  • Xiaogang Hao


In order to achieve covalent bond between multiwalled carbon nanotubes (MWCNTs) and waterborne polyurethane (WPU), pristine MWCNTs were first oxidized by strong acids and then underwent ring-opening reaction with epoxy resin to chemically attach epoxy moiety onto their surface. For fabrication of the MWCNTs/WPU composite, the epoxy moiety facilitates the dispersion of MWCNTs in the polymer matrix and could react with carboxylic acid or amine groups in the WPU macromolecules to form a crosslinked structure in their composite, resulting in a great improvement in their mechanical property, thermal stability, water resistance, and electrical conductivity. As the content of MWCNTs reached 1.5 wt%, the tensile strength of functionalized MWCNTs composite was improved by about 108% and the electrical conductivity was increased by six orders of magnitude compared to that of the pristine MWCNTs composite.


Carbon nanotubes Waterborne polyurethane Chemical crosslinking Composite 



Financial supports from the Foundation for Platform Base and Talent Program of Shanxi province (201705D211006), Science and Technology Achievement Transformation Fund Project of Shanxi Province (201704D131024), and Science and Technology Major Special Projects of Shanxi Province (20181101012) are gratefully acknowledged.


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Copyright information

© American Coatings Association 2019

Authors and Affiliations

  • Shaohui Wang
    • 1
    • 2
  • Huafeng Duan
    • 1
    • 2
  • Guozhang Ma
    • 1
    • 2
    Email author
  • Caiying Hou
    • 1
    • 2
  • Jianbin Wu
    • 2
  • Shasha Li
    • 1
  • Ziyuan Yang
    • 1
    • 2
  • Xiaogang Hao
    • 1
  1. 1.College of Chemistry and Chemical EngineeringTaiyuan University of TechnologyTaiyuanChina
  2. 2.Shanxi Key Laboratory of Functional Polymers for CoatingsShanxi Research Institute of Applied ChemistryTaiyuanChina

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