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Novel Interfacial Adhesion Experiments with Individual Carbon Nanofibers

  • Tanil Ozkan
  • Ioannis Chasiotis
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)

Abstract

A novel experimental method for the interfacial mechanics of nanofibers embedded in polymeric matrices was developed. The debond force was determined by MEMS devices whose motion was precisely measured from optical images by digital image correlation. This method is based on a novel approach to embed nanofiber and nanotubes in a thermoplastic or thermosetting polymer with submicron control of the embedded length and orientation of the nanofiber. The cross-head displacement resolution of this optical method is ~20 nm and the force resolution is of the order of nanonewtons. A traceable force calibration technique was integrated to calibrate the MEMS force sensors. Experiments were conducted for the first time with vapor grown carbon nanofibers embedded in EPON epoxy to reveal the role of nanofiber surface roughness and functionalization in the interfacial shear strength. It was established that the nanoscale surface roughness of nanofibers strongly promotes interfacial strength while surface functionalization can increase the interfacial adhesion strength by more than a factor of three. The present experiments are the first of their kind both in their fidelity and accuracy of the applied experimental method and the data scatter is dramatically reduced compared to prior experimental attempts.

Keywords

Digital Image Correlation Interfacial Adhesion Interfacial Strength Interfacial Shear Strength High Temperature Heat 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Tanil Ozkan
    • 1
  • Ioannis Chasiotis
    • 1
  1. 1.Aerospace EngineeringUniversity of Illinois at Urbana-ChampaignUrbanaU.S.A

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