DP-bioglass particles are biodegradable material which can be used as bioactive material in soft tissue and bone treatment. It has often been used in orthopedics and plastic surgery. Recently, DP-bioglass was also used as a carrier for drug and gene delivery systems. Additionally, ferrimagnetic DP-bioglass can be a potential candidate for magnetic-induction hyperthermia, by using a magnetic field. The aim of this work is the preparation and characterization of surface-modified DP-bioglass particles. Their surface should be modified by polyethylene glycol (PEG) and folic acid (FA) to improve its intracellular uptake and ability to target specific cells. The first PEG-FA complex was synthesized using carbodiimide (DCC) to link PEG with FA. Then PEG-FA molecules were immobilized on the surface of DP-bioglass particles, which were initially modified by amino-silane (AEAPS) as a coupling agent. FTIR, TGA and NMR were used to reveal this immobilization process. Biological studies have shown that ferrimagnetic DP-bioglass particles coated with PEG-FA complex significantly enhance their intracellular uptake by targeted cells.

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