Multi-walled carbon nanotubes/poly(L-lactide) nanocomposite strain sensor for biomechanical implants

Yang Liu, Shantanu Chakrabartty, Dimitris Stamatis Gkinosatis, Amar K. Mohanty, Nizar Lajnef

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

32 Scopus citations

Abstract

Many biomedical applications require high sensitivity for measuring strain induced in biomechanical structures. Although current metallic foil strain gauges are capable of measuring strain deformations, their low sensitivity and relatively large size render them unsuitable for implantable and wearable application. In this paper, we present a novel nanocomposites strain sensor using Poly(L-lactide) (PLLA) as a host polymer matrix and multi-walled carbon nanotubes (MWNTs) as filler. The PLLA matrix improves load transfer across the nanotubes by means of better interfacial bonding between polymer and carbon nanotubes filler, thus endowing the nanocomposites material with excellent piezoresistive property. Experimental results using a fabricated nanocomposites strain sensor is presented demonstrating its linear response and high gauge factor. Due to biocompatibility and biodegradability of PLLA, the proposed sensor is attractive for many biomedical and wearable applications.

Original languageEnglish
Title of host publicationConference Proceedings - IEEE Biomedical Circuits and Systems Conference Healthcare Technology, BiOCAS2007
Pages119-122
Number of pages4
DOIs
StatePublished - 2007
EventIEEE Biomedical Circuits and Systems Conference Healthcare Technology, BiOCAS2007 - Montreal, QC, Canada
Duration: Nov 27 2007Nov 30 2007

Publication series

NameConference Proceedings - IEEE Biomedical Circuits and Systems Conference Healthcare Technology, BiOCAS2007

Conference

ConferenceIEEE Biomedical Circuits and Systems Conference Healthcare Technology, BiOCAS2007
Country/TerritoryCanada
CityMontreal, QC
Period11/27/0711/30/07

Keywords

  • Carbon nanotube
  • Nanocomposites
  • Poly(L-lactide)
  • Strain sensor

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