Characterization of biodegradable core–clad borosilicate glass fibers with round and rectangular cross‐section

Mikko Hongisto (1, 2) , Sonya Ghanavati (1, 3) , Arnaud Lemiere (1) , Gregory Hauss (4) , Shashank Boraiah (2) , Louis Cornet (2) , Angeline Poulon-Quintin (2) , Dominique Pagnoux (5) , Dominique Bernard (2) , Jonathan Massera (3) , Laeticia Petit (1) , Veronique Jubera (2) , Sylvain Danto (2)

1 Photonics Laboratory
2 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
3 Faculty of Medicine and Health Technology [Tampere, Finland]
4 PLACAMAT - Plateforme Aquitaine de Caractérisation des Matériaux
5 XLIM - XLIM

Here, we report on core–clad bioactive borosilicate fibers, that we have prepared both with round and rectangular cross‐section profile. The exposed approach, which relies on the stacking and drawing of glass slabs, demonstrates our ability to develop bioactive‐based glass fibers with tailored cross‐section profiles. Tens‐of‐meters‐long fibers were successfully drawn, although suffering from elevated losses in the case of the rectangular ones. The response of the fibers in simulated body fluid was studied for both geometries. We found that a round cladding can act as protective layer, tempering effects of the corrosion. We also noticed that rectangular fibers are more prone to degradation, the enhanced corrosion beginning from their sharp corners as they accumulated residual tensile stress during drawing. To the best of our knowledge, this is the first report on the effect of residual tensile stresses from surface tension deformations applied to the corrosion of rectangular fibers. As geometry plays a critical role on the biodegradation behavior of the fiberglass, we believe the enclosed results could lead to the design of fiber devices with tailored cross‐section profile in order to tune their rate of degradation on solely based geometrical effects.

Mots clés: Fibers; Borosilicate glass; Bioactive glass; Biodegradation

Domaines: Matériaux

Mikko Hongisto, Sonya Ghanavati, Arnaud Lemiere, Gregory Hauss, Shashank Boraiah, et al.. Characterization of biodegradable core–clad borosilicate glass fibers with round and rectangular cross‐section. Journal of the American Ceramic Society, 2023, 106 (11), pp.6527-6540. ⟨10.1111/jace.19304⟩. ⟨hal-04197166⟩