Surface functionalized cnts grafted short carbon fibers in CFRP composites as interleaving toughener and damage sensor

Xusheng Du, Helezi Zhou, Hong Yuan Liu, Huamin Zhou, Yiu Wing Mai

Research output: Unpublished conference presentation (presented paper, abstract, poster)Conference presentation (not published in journal/proceeding/book)Academic researchpeer-review

1 Citation (Scopus)

Abstract

Surface functionalized carbon nanotubes (CNT) were in-situ deposited and grafted onto non-woven short carbon fiber (SCF) tissue by a simple ethanol flame synthesis method and the resulted CNT-SCFs were used as interleaving materials for toughening carbon fabric/epoxy composites. When these hierarchical carbon structures were used as interleaves in carbon fiber reinforced polymer (CFRP) composites, significant improvement (125%) in mode I interlaminar fracture energy of CFRP laminates was achieved with an areal density of 1.0 mg/cm2 CNT-SCFs when compared to the control laminates. Results indicated a positive synergistic toughening effect. Moreover, the crack damage sensing capacity of the toughened CFRP composites with a simple electrical response method was investigated theoretically based on a parallel resistance model and demonstrated by the experiments, where the electrical resistance change increased almost monotonously with crack increment and fits well with the calculations. Useful guideline for high crack sensing design of the laminate composite and electrical measurement were resulted.

Original languageEnglish
Publication statusPublished - 2017
Externally publishedYes
Event21st International Conference on Composite Materials, ICCM 2017 - Xi'an, China
Duration: 20 Aug 201725 Aug 2017

Conference

Conference21st International Conference on Composite Materials, ICCM 2017
Country/TerritoryChina
CityXi'an
Period20/08/1725/08/17

Keywords

  • CFRP composites
  • CNT
  • Damage sensor
  • Fracture toughness
  • Interleaving

ASJC Scopus subject areas

  • General Engineering
  • Ceramics and Composites

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