title: Designing drug-loaded multi-layered polymeric microparticles.
abstract: This work reports how novel multi-layered (from double-layered to quadruple-layered) microparticles comprising immiscible polymers can be fabricated through a simple, economical, reliable and versatile one-step solvent evaporation method. These multi-layered microparticles would be excellent candidates to overcome problems inherent in single-layered microparticles for drug delivery. Particle morphologies, layer configurations, and drug distribution were determined by scanning electron microscopy and Raman mapping. Key process parameters achieving the formation of the multi-layered structure were identified. Encapsulation of multiple drugs and layer localization of these drugs within these multi-layered microparticles have also shown to be possible, which were driven by drug-polymer affinity. This one-step fabrication technique can therefore be used for tailoring particle designs, thus facilitating the development of multiparticulate drug delivery devices.
authors: School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore.
authors: Wei Li
authors: WL
authors: Lee
authors: Effendi
authors: E
authors: Widjaja
authors: Say Chye Joachim
authors: SC
authors: Loo
mesh_terms: D002851:Chromatography, High Pressure Liquid; D015195:Drug Design; D008855:Microscopy, Electron, Scanning; D008863:Microspheres; D011108:Polymers / Q000737:chemistry*; D013059:Spectrum Analysis, Raman
chemical_list: D011108:Polymers