title: Novel biodegradable blend matrices for controlled drug release.
abstract: Phosphorylcholine-functionalized poly-epsilon-caprolactone (PC-PCL) is a new biodegradable polymer with good biocompatibility. In this study modulation of the controlled release of Ibuprofen (IB), a model drug, from poly-epsilon-caprolactone (PCL) by direct blending with PC-PCL is investigated. The influence of several factors such as the content of PC-PCL in the blend, drug loading and the molecular weight of PCL matrix upon the IB release is recognized. The release mechanism is discussed in terms of degradation/erosion profiles and hydrophilicity of the blend matrices. The IB release rate increased with the PC-PCL content because PC-PCL increased the hydrophilicity and biodegradability of the blends. Simultaneously, that release rate decreased with increase in the molecular weight of PCL in the blend. The drug loading in the blend also affected the release property of the matrix. Analysis of the release profiles following the power law indicated that the IB release was governed mainly by diffusion kinetics.
authors.affiliation: Key Laboratory of Molecular Engineering of Polymers of Ministry of Education, Department of Macromolecular Science, Fudan University, Shanghai 200433, China.
authors.forename: Mei
authors.initials: M
authors.lastname: Lin
authors.forename: Sheng
authors.initials: S
authors.lastname: Meng
authors.forename: Wei
authors.initials: W
authors.lastname: Zhong
authors.forename: Zhulai
authors.initials: Z
authors.lastname: Li
authors.forename: Qiangguo
authors.initials: Q
authors.lastname: Du
authors.forename: Piotr
authors.initials: P
authors.lastname: Tomasik
mesh_terms: D001672:Biocompatible Materials; D002152:Calorimetry, Differential Scanning; D002850:Chromatography, Gel; D003692:Delayed-Action Preparations; D016503:Drug Delivery Systems; D007052:Ibuprofen / Q000008:administration & dosage; D008970:Molecular Weight; D011091:Polyesters / Q000008:administration & dosage; D014961:X-Ray Diffraction
chemical_list: D001672:Biocompatible Materials; D003692:Delayed-Action Preparations; D011091:Polyesters; C016240:polycaprolactone; D007052:Ibuprofen