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An electrospun membrane for vascular stent coating made of2-methacryloyloxyethyl phosphorylcholine and butyl methacrylate copolymer(MPC-co-BMA), also known as (PMB), reinforced with functionalized and nitrogendoped reduced graphene oxide (f-NrGO) is presented. This membrane due to thenitrogen doped reduced graphene oxide (NrGO) negative electric charge has thecapacity to repeal low density lipoproteins (LDL), which under specificconditions are the main cause of atherosclerotic disease. The NrGOfunctionalization process is detailed, as it creates strong bonds between NrGOand PMB, avoiding NrGO sheets to detach from the membrane. The copolymersynthesis was characterized by FTIR and chemical bonds between f-NrGO and PMBwere proved by XPS and HNMR. Additionally, a simplified test bank thatsimulates blood flow conditions demonstrated the NrGO functionalization effectover the membrane. For the electrospinning process, optimal parameters were avoltage of 14.5 kV, and a flow rate of 0.3 mL/h, which lead to betterproperties of the membrane for the application. DMA results confirmed that thebest reinforcement percentage of f-NrGO in terms of mechanical properties was0.1 wt% and AFM images indicated the presence of the f-NrGO sheets over thefibers. Finally, the contact angle revealed the repulsion response to LDL, suchbehavior is promising to applications like cardiovascular coated stents.

Doped graphene oxide functionalization strategy for synthesis of nanocomposite membranes: electrospun coatings in biomedical field application