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Fabrication process of bilayer CUR-loaded microparticles coated with alkylene quaternary ammonium salt grafted poly(acrylic acid) (denoted as PAA-C(O)O-(CH2)n-N+(CH3)3(m); n = 6, 12; m = 8, 10, 14%; Table 1) as the outer layer (A); structures of microparticle components (B).
