Bamboo-inspired crack-face bridging fiber reinforced composites simultaneously attain high strength and toughness

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Hao Wang
  • Zhangyu Wu
  • Jie Tao
  • Bin Wang
  • Chaobin He

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number2308070
Journal / PublicationAdvanced Science
Online published28 Dec 2023
Publication statusOnline published - 28 Dec 2023

Abstract

Biological strong and tough materials have been providing original structural designs for developing bioinspired high-performance composites. However, new synergistic strengthening and toughening mechanisms from bioinspired structures remain yet to be explored and employed to upgrade current carbon material reinforced polymer composites, which are keystone to various modern industries. In this work, from bamboo, the featured cell face-bridging fibers, are abstracted and embedded in a cellular network structure, and develop an epoxy resin/carbon composite featuring biomimetic architecture through a fabrication approach integrating freeze casting, carbonization, and resin infusion with carbon fibers (CFs) and carbon nanotubes (CNTs). Results show that this bamboo-inspired crack-face bridging fiber reinforced composite simultaneously possesses a high strength (430.8 MPa) and an impressive toughness (8.3 MPa m1/2), which surpass those of most resin-based nanocomposites reported in the literature. Experiments and multiscale simulation models reveal novel synergistic strengthening and toughening mechanisms arising from the 2D faces that bridge the CFs: sustaining and transferring loads to enhance the overall load-bearing ability and furthermore, incorporating CNTs pullout that resembles the intrinsic toughening at the molecular to nanoscale and strain delocalization, crack branching, and crack deflection as the extrinsic toughening at the microscale. These constitute a new effective and efficient strategy to develop simultaneously strong and tough composites through abstracting and implenting novel bioinspired structures, which contributes to addressing the long-standingly challenging attainment of both high strength and toughness for advanced structural materials. © 2023 The Authors. Advanced Science published by Wiley-VCH GmbH.

Research Area(s)

  • bamboo-inspired structure design, carbon material reinforced composite, face-bridging fiber reinforced composite, simultaneously strong and tough

Bibliographic Note

Information for this record is supplemented by the author(s) concerned.