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Production of drug-releasing biodegradable microporous scaffold using a two-step micro-encapsulation/supercritical foaming process

Lookup NU author(s): Dr Cindy LeeORCiD


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A two-step fabrication process combining emulsification-solvent evaporation method for encapsulation of drug in PLGA microparticles followed by supercritical gas foaming was developed to produce drug-releasing biodegradable micro-porous foams. The encapsulation and release of model hydrophobic drug (Curcumin) and of model hydrophilic drug (Gentamicin) were investigated in this work. By utilizing a two-step fabrication process, a uniform dispersion of the drug in PLGA polymer matrix can be achieved and the method can be further adapted for the encapsulation of a wide range of active ingredient (both hydrophobic and hydrophilic) in biodegradable micro-porous scaffold.The in vitro release profile of the drug-encapsulated PLGA foam was studied over a period of 2 weeks and it was observed that the drug release profile can be engineered by the selection of different PLGA polymer blend, varying lactic to glycolic ratio and molecular chain length of the polymer, and by addition of compatible biodegradable polymer such as Polyethylene Glycol (PEG) to the polymer matrix.

Publication metadata

Author(s): Ong YXJ, Lee LY, Davoodi P, Wang CH

Publication type: Article

Publication status: Published

Journal: The Journal of Supercritical Fluids

Year: 2018

Volume: 133

Issue: Part 1

Pages: 263-269

Print publication date: 01/03/2018

Online publication date: 20/10/2017

Acceptance date: 20/10/2017

ISSN (print): 0896-8446

Publisher: Elsevier


DOI: 10.1016/j.supflu.2017.10.018


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