Spinning of endless bioactive silicate glass fibres for fibre reinforcement applications

Julia Eichhorn, Cindy Elschner, Martin Groß, Rudi Reichenbächer, Aarón X. Herrera Martín, Ana Prates Soares, Heilwig Fischer, Julia Kulkova, Niko Moritz, Leena Hupa, Markus Stommel, Christina Scheffler*, Martin Kilo

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

Bioactive glasses have been used for many years in the human body as bone substitute. Since bioactive glasses are not readily available in the form of endless thin fibres with diameters below 20 µm, their use is limited to mainly non-load-bearing applications in the form of particles or granules. In this study, the spinnability of four bioactive silicate glasses was evaluated in terms of crystallisation behaviour, characteristic processing temperatures and viscosity determined by thermal analysis. The glass melts were drawn into fibres and their mechanical strength was measured by single fibre tensile tests before and after the surface treatment with different silanes. The degradation of the bioactive glasses was observed in simulated body fluid and pure water by recording the changes of the pH value and the ion concentration by inductively coupled plasma optical emission spectrometry; further, the glass degradation process was monitored by scanning electron microscopy. Additionally, first in vitro experiments using murine pre-osteoblast cell line MC3T3E1 were carried out in order to evaluate the interaction with the glass fibre surface. The results achieved in this work show up the potential of the manufacturing of endless bioactive glass fibres with appropriate mechanical strength to be applied as reinforcing fibres in new innovative medical implants.

Original languageEnglish
Article number7927
JournalApplied Sciences (Switzerland)
Volume11
Issue number17
DOIs
Publication statusPublished - 27 Aug 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • Bioactive glass fibres
  • Glass fibre spinning
  • Silanes
  • Surface modification

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