Ultra-strong polyethyleneimine-graphene oxide nanocomposite film via synergistic interactions and its use for humidity sensing

Lei Chen, Zhi Li, Guangshun Wu, Yidi Wang, Tao Wang, Yan Ma, Bin Fei

Research output: Journal article publicationJournal articleAcademic researchpeer-review

8 Citations (Scopus)


The ternary roles of polyethyleneimine (PEI) as a polymer matirx, a reducing agent and a surface modifier have been presented to fabricate graphene oxide (GO) reinforced polymer nanocomposite films. GO is modified with PEI-glycerol diglycidyl ether (GDE) cross-linking networks in aqueous solution and in situ reduced by PEI simultaneously. Synergistic reinforcement of mechanical interlocking and hydrogen bonding leads to dramatic increases in tensile strength and Young's modulus by 98.3% and 87% respectively, at 7.5 wt% GO loading of PEI. The partial reduced GO sheets serve as moisture barriers for water-soluble PEI, and the nanocomposite films are shown to be structurally robust humidity sensors over the relative humidity (RH) range of 40–90%.

Original languageEnglish
Pages (from-to)341-347
Number of pages7
JournalComposites Part A: Applied Science and Manufacturing
Publication statusPublished - 1 Dec 2018


  • A. Graphene
  • A. nanocomposite
  • B. Electrical properties
  • B. Mechanical properties

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials

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