The influence of precursor addition order on the porosity of sol–gel bioactive glasses

Delihta Fernando (1) , Pierre Colon (1, 2) , Mark Cresswell (3) , Catherine Journet (1) , Nelly Pradelle-Plasse (1, 2) , Phil Jackson (3) , Brigitte Grosgogeat (1, 4, 5) , Nina Attik (1, 4)

1 LMI - Laboratoire des Multimatériaux et Interfaces
2 CHU Rothschild [AP-HP]
3 Lucideon
4 UFR d’Odontologie, Université de Lyon,
5 HCL - Hospices Civils de Lyon

Objective The superior textural properties of sol–gel derived bioactive glasses compared to conventional melt quench glasses accounts for their accelerated bioactivity in vitro. Several studies have explored ways to improve the surface properties of sol–gel glasses in order to maximise their efficiency for bone and tooth regeneration. In this study, we investigated the effect of order of network modifying precursor addition on the textural properties of sol–gel derived bioactive glasses. Methods The effect of precursor addition order on the glass characteristics was assessed by switching the order of network modifying precursor (calcium acetate monohydrate and sodium acetate anhydrous) addition for a fixed composition of bioactive glass (75SiO2:5CaO:10Na2O:10P2O5). Results The results of this study showed that the order of precursor addition does influence the porosity of these glasses. For the glasses of a fixed composition and preparation conditions we achieved a doubling of surface area, a 1.5 times increase in pore volume and a 1.2 times decrease in pore size just by the mixing the network modifying precursors and adding them together in the sol–gel preparation. Significance This simple and straightforward route adaptation to the preparation of bioactive glasses would allow us to enhance the textural properties of existing and novel composition of bioactive glasses and thus accelerate their bioactivity.

Mots clés: Bioactive glass; Sol–gel; Porosity; Surface area; Mesoporous; Network modifiers; Precursors order

Domaines: Sciences du Vivant [q-bio]

Delihta Fernando, Pierre Colon, Mark Cresswell, Catherine Journet, Nelly Pradelle-Plasse, et al.. The influence of precursor addition order on the porosity of sol–gel bioactive glasses. Dental Materials, 2018, 34 (9), pp.1323-1330. ⟨10.1016/j.dental.2018.06.003⟩. ⟨hal-02063848⟩