Optimisation of a novel glass-alginate hydrogel for the treatment of intracranial aneurysms.

•Hydrogels composed of alginate, an ion releasing glass and glucono-delta-lactone were produced.•The hydrogel working time is governed by the chemical composition of the alginate.•The hydrogel hardening time is governed by the molecular weight of the alginate.•The gelation rate of the hydrogel is slow compared to typical alginate hydrogels.