Processing and bioactivity of 45S5 Bioglass®-graphene nanoplatelets composites

  • Harshit Porwal
  • Salvatore Grasso
  • Luis Cordero-Arias
  • Chunchun Li
  • Aldo R. Boccaccini
  • Mike J. Reece
Article

DOI: 10.1007/s10856-014-5172-x

Cite this article as:
Porwal, H., Grasso, S., Cordero-Arias, L. et al. J Mater Sci: Mater Med (2014) 25: 1403. doi:10.1007/s10856-014-5172-x

Abstract

Well dispersed 45S5 Bioglass® (BG)-graphene nanoplatelets (GNP) composites were prepared after optimising the processing conditions. Fully dense BG nanocomposites with GNP loading of 1, 3 and 5 vol% were consolidated using Spark plasma sintering (SPS). SPS avoided any structural damage of GNP as confirmed using Raman spectroscopy. GNP increased the viscosity of BG-GNP composites resulting in an increase in the sintering temperature by ~50 °C compared to pure BG. Electrical conductivity of BG-GNP composites increased with increasing concentration of GNP. The highest conductivity of 13 S/m was observed for BG-GNP (5 vol%) composite which is ~9 orders of magnitude higher compared to pure BG. For both BG and BG-GNP composites, in vitro bioactivity testing was done using simulated body fluid for 1 and 3 days. XRD confirmed the formation of hydroxyapatite for BG and BG-GNP composites with cauliflower structures forming on top of the nano-composites surface. GNP increased the electrical conductivity of BG-GNP composites without affecting the bioactivity thus opening the possibility to fabricate bioactive and electrically conductive scaffolds for bone tissue engineering.

Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Harshit Porwal
    • 1
    • 2
  • Salvatore Grasso
    • 1
    • 2
  • Luis Cordero-Arias
    • 3
  • Chunchun Li
    • 4
  • Aldo R. Boccaccini
    • 3
  • Mike J. Reece
    • 1
    • 2
  1. 1.School of Engineering and Material ScienceQueen Mary University of LondonLondonUK
  2. 2.Nanoforce Technology LimitedLondonUK
  3. 3.Institute of Biomaterials, Department of Materials Science and EngineeringUniversity of Erlangen-NurembergErlangenGermany
  4. 4.Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Centre for Dielectric ResearchXi’an Jiaotong UniversityXi’anChina

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