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The aspirin(ASA) was loaded on the graphene oxide(GO) by SC-CO2(supercritical CO2) method and GO/ASA complex was obtained, then the CaP-CS-GO/ASA(calcium-phosphorus-chitosan-graphene oxide/aspirin) coating was deposited on the magnesium alloy matrix by electrophoresis. The degradation behavior of magnesium alloy matrix CaP-CS-GO/ASA by SC-CO2 drug loading was studied by immersion experiment. The effects of the soaking solution and material coating on the proliferation of mouse osteoblasts 3T3E1 in vitro were detected by CCK-8 method. The results showed that the corrosion reaction of the magnesium alloy matrix CaP-CS-GO/ASA by SC-CO2 drug loading in m-SBF was orderly controlled by electrochemical and finite-layer diffusion processes, charge transfer and semi-infinite diffusion processes with the increase of the immersion time. The ASA presence in the CaP-CS-GO coating promoted the proliferation, adhesion and growth of osteoblasts, and the obtained bone material had the good osteogenesis.

international journal of electrochemical science

Supercritical CO2 Assisted Drug Loading and Degradation Behavior and Osteogenicity of Magnesium Alloy Matrix Calcium-Phosphorus-Chitosan-Graphene Oxide Bone Material