Preparation of 5-Fluorouracil Loaded Polylactide-co-glycolide-co-methoxy Poly(ethylene glycol) (PLGA-mPEG) Nanoparticles via High Speed Shearing

5-Fluorouracil(5-FU) loaded nanoparticles(NPs) were prepared by a high speed shearing double emulsion method with polylactide-co-glycolide-co-methoxy poly(ethylene glycol)(PLGA-mPEG) as loading material. The prepared NPs possess a negative zeta potential and their loading efficiency is about 15%(mass fraction). The result of in vitro release shows that the release behavior of 5-FU from NPs is coincident with Zero-level release from the second day.