Effect of random/aligned nylon-6/MWCNT fibers on dental resin composite reinforcement

Alexandre L S Borges, Eliseu A. Münchow, Ana Carolina de Oliveira Souza, Takamitsu Yoshida, Pekka K. Vallittu, Marco C. Bottino

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The aims of this study were (1) to synthesize and characterize random and aligned nanocomposite fibers of multi-walled carbon nanotubes (MWCNT)/nylon-6 and (2) to determine their reinforcing effects on the flexural strength of a dental resin composite.Nylon-6 was dissolved in hexafluoropropanol (10wt%), followed by the addition of MWCNT (hereafter referred to as nanotubes) at two distinct concentrations (i.e., 0.5 or 1.5wt%). Neat nylon-6 fibers (without nanotubes) were also prepared. The solutions were electrospun using parameters under low- (120rpm) or high-speed (6000rpm) mandrel rotation to collect random and aligned fibers, respectively. The processed fiber mats were characterized by scanning (SEM) and transmission (TEM) electron microscopies, as well as by uni-axial tensile testing. To determine the reinforcing effects on the flexural strength of a dental resin composite, bar-shaped (20×2×2mm3) resin composite specimens were prepared by first placing one increment of the composite, followed by one strip of the mat, and one last increment of composite. Non-reinforced composite specimens were used as the control. The specimens were then evaluated using flexural strength testing. SEM was done on the fractured surfaces. The data were analyzed using ANOVA and the Tukey[U+05F3]s test (α=5%).Nanotubes were successfully incorporated into the nylon-6 fibers. Aligned and random fibers were obtained using high- and low-speed electrospinning, respectively, where the former were significantly (p

Original languageEnglish (US)
Pages (from-to)134-144
Number of pages11
JournalJournal of the Mechanical Behavior of Biomedical Materials
Volume48
DOIs
StatePublished - Aug 1 2015
Externally publishedYes

Fingerprint

Carbon Nanotubes
Carbon nanotubes
Reinforcement
Resins
Fibers
Composite materials
Bending strength
Nanotubes
Scanning electron microscopy
Composite Resins
Tensile testing
Electrospinning
Analysis of variance (ANOVA)
Electron microscopy
Composite Dental Resin
nylon 6
Nanocomposites
Transmission electron microscopy
Scanning
Testing

Keywords

  • Composite resin
  • Fiber reinforcement
  • MWCNT
  • Nanofibers
  • Nylon-6

ASJC Scopus subject areas

  • Biomaterials
  • Biomedical Engineering
  • Mechanics of Materials

Cite this

Borges, A. L. S., Münchow, E. A., de Oliveira Souza, A. C., Yoshida, T., Vallittu, P. K., & Bottino, M. C. (2015). Effect of random/aligned nylon-6/MWCNT fibers on dental resin composite reinforcement. Journal of the Mechanical Behavior of Biomedical Materials, 48, 134-144. https://doi.org/10.1016/j.jmbbm.2015.03.019

Effect of random/aligned nylon-6/MWCNT fibers on dental resin composite reinforcement. / Borges, Alexandre L S; Münchow, Eliseu A.; de Oliveira Souza, Ana Carolina; Yoshida, Takamitsu; Vallittu, Pekka K.; Bottino, Marco C.

In: Journal of the Mechanical Behavior of Biomedical Materials, Vol. 48, 01.08.2015, p. 134-144.

Research output: Contribution to journalArticle

Borges, Alexandre L S ; Münchow, Eliseu A. ; de Oliveira Souza, Ana Carolina ; Yoshida, Takamitsu ; Vallittu, Pekka K. ; Bottino, Marco C. / Effect of random/aligned nylon-6/MWCNT fibers on dental resin composite reinforcement. In: Journal of the Mechanical Behavior of Biomedical Materials. 2015 ; Vol. 48. pp. 134-144.
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