Effect of dsDNA wrapped single-walled carbon nanotubes on the thermal and mechanical properties of polycaprolactone and polyglycolide fiber blend composites

Shayla S. Spearman, Fahmida Irin, Iris V. Rivero, Micah J. Green, Noureddine Abidi

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The aim of this research is to create a stronger biopolymer/carbon nanotube composite suited for loadbearing biomedical applications. Electrospinning was used to fabricate a miscible polycaprolactone (PCL)/ polyglycolide (PGA) fiber blend in order to increase the interfacial bonding of the fibers to a PCL matrix. To further increase the strength of the composite, purified single-walled carbon nanotubes (SWNTs) wrapped with double stranded deoxyribonucleic acid (dsDNA) were introduced to the PCL-PGA fibers. Bulk PCL was compression molded to encapsulate the PCL-PGA blended fibers as well as the PCL-PGA/ dsDNA-SWNT fibers. Mechanical properties were determined with three-point bend testing to establish the composite's load transfer capabilities. It was demonstrated that incorporation of PCL-PGA/ dsDNA-SWNT fibers increased the strength and modulus over that of the bulk PCL and PCL-PGA fibers alone. Furthermore, the use of blended fibers allowed load transfer from the dsDNA-SWNTs to the PCL matrix.

Original languageEnglish
Pages (from-to)476-481
Number of pages6
JournalPolymer
Volume56
DOIs
StatePublished - Jan 15 2015

Keywords

  • Carbon nanotubes
  • Poly (ε-caprolactone)
  • Polyglycolide

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